Initial commit for EELF Logger

Issue-ID: DCAEGEN2-633
Change-Id: I108929219d2d6570080d2fe7792cbc5a6530bb59
Signed-off-by: Singla, Rajiv (rs153v) <rs153v@att.com>

95 files changed, 6680 insertions, 0 deletions

diff --git a/eelf-logger/cpd-exclude.properties b/eelf-logger/cpd-exclude.properties
new file mode 100644
index 0000000..399fb30
--- /dev/null
+++ b/eelf-logger/cpd-exclude.properties
@@ -0,0 +1,21 @@
+#

+# ================================================================================

+# Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.

+# ================================================================================

+# Licensed under the Apache License, Version 2.0 (the "License");

+# you may not use this file except in compliance with the License.

+# You may obtain a copy of the License at

+#

+#      http://www.apache.org/licenses/LICENSE-2.0

+#

+# Unless required by applicable law or agreed to in writing, software

+# distributed under the License is distributed on an "AS IS" BASIS,

+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

+# See the License for the specific language governing permissions and

+# limitations under the License.

+# ============LICENSE_END=========================================================

+#

+#

+

+# Ignored as there are different log specs

+org.onap.dcae.utils.eelf.logger.model.spec.AuditLogSpecImpl,org.onap.dcae.utils.eelf.logger.model.spec.MetricLogSpecImpl

diff --git a/eelf-logger/eelf-logger-api/pom.xml b/eelf-logger/eelf-logger-api/pom.xml
new file mode 100644
index 0000000..1d7fa1b
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/pom.xml
@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ ================================================================================
+  ~ Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+  ~ ================================================================================
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~ ============LICENSE_END=========================================================
+  ~
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.onap.dcaegen2.utils</groupId>
+        <artifactId>eelf-logger</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>eelf-logger-api</artifactId>
+    <packaging>jar</packaging>
+
+    <!-- EELF LOGGING API CONTAINS VARIOUS INTERFACES REQUIRED TO SUPPORT SUPPORT EELF LOGGING SPECIFICATIONS -->
+    <name>dcaegen2-utils-eelf-logger-api</name>
+    <description>API contracts for EELF Logging Framework</description>
+
+    <properties>
+        <main.basedir>${project.parent.basedir}</main.basedir>
+        <!-- SONAR SETTINGS : EXCLUDE TEST COVERAGE AS API ONLY CONTAINS INTERFACES AND NO BUSINESS LOGIC-->
+        <sonar.coverage.exclusions>**/api/**</sonar.coverage.exclusions>
+    </properties>
+
+    <!-- NOTE: THIS API MODULE MUST NOT HAVE ANY DEPENDENCIES IN COMPILE SCOPE-->
+
+</project>
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/AppLogInfo.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/AppLogInfo.java
new file mode 100644
index 0000000..bdce8d1
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/AppLogInfo.java
@@ -0,0 +1,101 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.info;
+
+/**
+ *  Captures information about application which is doing the logging. All app log fields must remain same for
+ *  the whole duration of the application once its instance is created.
+ *
+ * @author Rajiv Singla
+ */
+public interface AppLogInfo extends LogInfo {
+
+    /**
+     * Required field contains UUID which identifies this service instance inside an inventory management system
+     * (e.g. A&AI) to reference/manage this service as a unit
+     *
+     * @return remote VM Name or service the request is acting upon.
+     */
+    String getServiceInstanceID();
+
+    /**
+     * Required field contains a universally unique identifier used to differentiate between multiple instances of
+     * the same (named), log writing service/application. Its value is set at instance creation time (and read by it,
+     * e.g. at start/initialization time from the environment).  This value should be picked up by the component
+     * instance from its configuration file and subsequently used to enable differentiating log records created by
+     * multiple, locally load balanced EELF component or sub component instances that are otherwise identically
+     * configured.
+     *
+     * @return instance UUID
+     */
+    String getInstanceUUID();
+
+    /**
+     * Optional field contains VM Name where app is deployed.
+     * DCAE sub components should populate this field but it can be empty if
+     * determined that its value can be added by the log files collecting agent itself (e.g. Splunk).
+     * <p>
+     * <b> Example: host.vm.name.com</b>
+     * </p>
+     *
+     * @return virtual server name
+     */
+    String getVirtualServerName();
+
+    /**
+     * Optional field contains the logging component host server’s IP address.
+     * <p>
+     * <b>Example: 127.0.0.100</b>
+     * </p>
+     *
+     * @return server ip address
+     */
+    String getServerIPAddress();
+
+    /**
+     * Required field for VM's fully qualified domain name or hosting machine fully qualified domain name.
+     * <p>
+     * <b> Example: host.fqdn.com</b>
+     * </p>
+     *
+     * @return server host fully qualified domain name
+     */
+    String getServerFQDN();
+
+
+    /**
+     * Contains default values for {@link AppLogInfo}
+     */
+    interface Defaults {
+
+        String DEFAULT_SERVICE_INSTANCE_ID = "UNKNOWN_INSTANCE_ID";
+
+        String DEFAULT_INSTANCE_UUID = "";
+
+        String DEFAULT_VIRTUAL_SERVER_NAME = "";
+
+        String DEFAULT_SERVER_IP_ADDRESS = "UNKNOWN_IP_ADDRESS";
+
+        String DEFAULT_SERVER_FQDN = "UNKNOWN_SERVER_FQDN";
+
+    }
+
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/CodeLogInfo.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/CodeLogInfo.java
new file mode 100644
index 0000000..bea195d
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/CodeLogInfo.java
@@ -0,0 +1,55 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.info;
+
+/**
+ * Capture field required to log details about code which is generating the log message.
+ * <p>
+ * <b>NOTE: When using a logging framework(e.g. logback) implementation these fields may be automatically deduced - so
+ * settings these fields is not required by the application and even if application sets these fields the logging
+ * framework may ignore it
+ * </b>
+ * </p>
+ *
+ * @author Rajiv Singla
+ */
+public interface CodeLogInfo extends LogInfo {
+
+
+    /**
+     * Optional field used if wanting to trace processing of a request over a number of sub-components of a single EELF
+     * component. It should be preceded by a log record that establishes its chaining back to the corresponding
+     * requestID.
+     *
+     * @return thread ID used to trace processing of request over number of sub-components of single EELF Component.
+     */
+    String getThreadId();
+
+
+    /**
+     * Optional field: If available for OO programing languages that support this concept. This is the name of the
+     * class that has caused the log record to be created.
+     *
+     * @return name of the class that has the caused the log record to be created
+     */
+    String getClassName();
+
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/CustomFieldsLogInfo.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/CustomFieldsLogInfo.java
new file mode 100644
index 0000000..634afa6
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/CustomFieldsLogInfo.java
@@ -0,0 +1,62 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.info;
+
+/**
+ * Captures fields required to log Custom fields
+ *
+ * @author Rajiv Singla
+ */
+public interface CustomFieldsLogInfo extends LogInfo {
+
+    /**
+     * Optional field that can be used by developers to include additional application-specific
+     * information to support operations and troubleshooting of the system.
+     *
+     * @return additional application-specific information to support operations and troubleshooting of the system.
+     */
+    String getCustomField1();
+
+    /**
+     * Optional field that can be used by developers to include additional application-specific
+     * information to support operations and troubleshooting of the system.
+     *
+     * @return additional application-specific information to support operations and troubleshooting of the system.
+     */
+    String getCustomField2();
+
+    /**
+     * Optional field that can be used by developers to include additional application-specific
+     * information to support operations and troubleshooting of the system.
+     *
+     * @return additional application-specific information to support operations and troubleshooting of the system.
+     */
+    String getCustomField3();
+
+    /**
+     * Optional field that can be used by developers to include additional application-specific
+     * information to support operations and troubleshooting of the system.
+     *
+     * @return additional application-specific information to support operations and troubleshooting of the system.
+     */
+    String getCustomField4();
+
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/ErrorLogInfo.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/ErrorLogInfo.java
new file mode 100644
index 0000000..876037c
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/ErrorLogInfo.java
@@ -0,0 +1,76 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.info;
+
+/**
+ * Captures fields required to log error related information
+ *
+ * @author Rajiv Singla
+ */
+public interface ErrorLogInfo extends LogInfo {
+
+
+    /**
+     * Required field contains an error code representing the error condition. The codes can be chose by
+     * the logging application but they should adhere to the guidelines embodied in the table below:
+     * <table summary="Error Codes" cellspacing=0 border=1>
+     * <tr>
+     * <td style=min-width:50px>Error type</td>
+     * <td style=min-width:50px>Notes</td>
+     * </tr>
+     * <tr>
+     * <td style=min-width:50px>100</td>
+     * <td style=min-width:50px>Permission errors</td>
+     * </tr>
+     * <tr>
+     * <td style=min-width:50px>200</td>
+     * <td style=min-width:50px>Availability errors/Timeouts</td>
+     * </tr>
+     * <tr>
+     * <td style=min-width:50px>300</td>
+     * <td style=min-width:50px>Data errors</td>
+     * </tr>
+     * <tr>
+     * <td style=min-width:50px>400</td>
+     * <td style=min-width:50px>Schema errors</td>
+     * </tr>
+     * <tr>
+     * <td style=min-width:50px>500</td>
+     * <td style=min-width:50px>Business process errors</td>
+     * </tr>
+     * <tr>
+     * <td style=min-width:50px>900</td>
+     * <td style=min-width:50px>Unknown Errors</td>
+     * </tr>
+     * </table>
+     *
+     * @return error Code
+     */
+    Integer getErrorCode();
+
+
+    /**
+     * Required field contains a human readable description of the error condition.
+     *
+     * @return human readable description of the error condition
+     */
+    String getErrorDescription();
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/LogInfo.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/LogInfo.java
new file mode 100644
index 0000000..4a3680f
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/LogInfo.java
@@ -0,0 +1,30 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.info;
+
+import java.io.Serializable;
+
+/**
+ * Marker interface for all EELF Logging Information Components
+ *
+ * @author Rajiv Singla
+ */
+public interface LogInfo extends Serializable {
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/LogLevelCategory.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/LogLevelCategory.java
new file mode 100644
index 0000000..665a280
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/LogLevelCategory.java
@@ -0,0 +1,36 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.info;
+
+/**
+ * Captures various logging levels.
+ * NOTE: Enum ordered signifies low to high log level severity
+ *
+ * @author Rajiv Singla
+ */
+public enum LogLevelCategory implements LogInfo {
+
+    DEBUG,
+    INFO,
+    WARN,
+    ERROR,
+    FATAL;
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/MessageLogInfo.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/MessageLogInfo.java
new file mode 100644
index 0000000..cd53ccf
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/MessageLogInfo.java
@@ -0,0 +1,62 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.info;
+
+import java.util.Date;
+
+/**
+ * Captures fields required for message level logging. These fields are mostly derived fields. For example: creation
+ * timestamp can be auto generated based on system time, {@link RequestStatusCode} and {@link NagiosAlertLevel} can be
+ * derived based on {@link LogLevelCategory}
+ *
+ * @author Rajiv Singla
+ */
+public interface MessageLogInfo extends LogInfo {
+
+
+    /**
+     * Required field to capture when the message was created
+     * The value should be represented in UTC and formatted according to ISO 8601.
+     * <p>
+     * <b>Example: 2015-06-03T13:21:58+00:00</b>
+     * </p>
+     *
+     * @return message creation creationTimestamp
+     */
+    Date getCreationTimestamp();
+
+    /**
+     * Required field contains a value of COMPLETE or ERROR to indicate high level success or failure of the
+     * request related activities.
+     *
+     * @return value to indicate high level success or failure of the request related activities
+     */
+    RequestStatusCode getStatusCode();
+
+
+    /**
+     * Optional field for Nagios monitoring/alerting severity code
+     *
+     * @return nagios monitoring/alerting severity code
+     */
+    NagiosAlertLevel getAlertSeverity();
+
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/MiscLogInfo.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/MiscLogInfo.java
new file mode 100644
index 0000000..bf1e451
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/MiscLogInfo.java
@@ -0,0 +1,45 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.info;
+
+/**
+ * Captures optional / deprecated fields that can be populated as per EELF Logging Requirements
+ *
+ * @author Rajiv Singla
+ */
+public interface MiscLogInfo extends LogInfo {
+
+    /**
+     * Optional field that can can be used to capture the flow of a transaction through the system by
+     * indicating the components and operations involved in processed. If present, it can be denoted by a comma
+     * separated list of components and applications.
+     *
+     * @return list of comma separated components and operations involved in processing
+     */
+    String getProcessId();
+
+    /**
+     * This field is deprecated and should be left empty.
+     *
+     * @return deprecated field value - should be empty
+     */
+    String getUnused();
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/NagiosAlertLevel.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/NagiosAlertLevel.java
new file mode 100644
index 0000000..3da5fc3
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/NagiosAlertLevel.java
@@ -0,0 +1,52 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.info;
+
+/**
+ * Enum for Nagios monitoring/alerting codes as per table below.
+ * <p>
+ * <table cellspacing=0 border=1>
+ * <tr><th>Return Code</th><th>Service State</th><th>Host State</th></tr>
+ * <tr><td>0</td><td>OK</td><td>UP</td></tr>
+ * <tr><td>1</td><td>WARNING</td><td>UP or DOWN/UNREACHABLE*</td></tr>
+ * <tr><td>2</td><td>CRITICAL</td><td>DOWN/UNREACHABLE</td></tr>
+ * <tr><td>3</td><td>UNKNOWN</td><td>DOWN/UNREACHABLE</td></tr>
+ * </table>
+ *
+ * @author Rajiv Singla
+ */
+public enum NagiosAlertLevel implements LogInfo {
+
+    OK("0"),
+    WARNING("1"),
+    CRITICAL("2"),
+    UNKNOWN("3");
+
+    private String severityCode;
+
+    NagiosAlertLevel(final String severityCode) {
+        this.severityCode = severityCode;
+    }
+
+    public String getSeverityCode() {
+        return severityCode;
+    }
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/RequestIdLogInfo.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/RequestIdLogInfo.java
new file mode 100644
index 0000000..68d5a17
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/RequestIdLogInfo.java
@@ -0,0 +1,44 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.info;
+
+/**
+ * Captures fields required for logging request information
+ *
+ * @author Rajiv Singla
+ */
+public interface RequestIdLogInfo extends LogInfo {
+
+    /**
+     * Required field containing requestID which uniquely that identifies a single transaction request within the EELF
+     * platform. Its value is conforms to RFC4122 UUID. The requestID value is passed using a REST API from one
+     * EELF component to another via HTTP Headers named X-RequestID
+     * <p>
+     * <b>724229c0-9945-11e5-bcde-0002a5d5c51b:1234</b>
+     * </p>
+     * If receiving a composite requestID value, e.g. something of the form UUID-1:UUID-2, the receiving component
+     * should only use the UUID-1 portion (i.e. remove the “:” and any trailing suffix, e.g. UUID-2) as the requestID
+     * field value for its log files.
+     *
+     * @return requestID which uniquely that identifies a single transaction request within the EELF
+     */
+    String getRequestId();
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/RequestStatusCode.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/RequestStatusCode.java
new file mode 100644
index 0000000..b022b80
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/RequestStatusCode.java
@@ -0,0 +1,32 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.info;
+
+/**
+ * Enum to indicate high level success or failure of the request related activities
+ *
+ * @author Rajiv Singla
+ */
+public enum RequestStatusCode {
+
+    ERROR,
+    COMPLETE;
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/RequestTimingLogInfo.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/RequestTimingLogInfo.java
new file mode 100644
index 0000000..7448e69
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/RequestTimingLogInfo.java
@@ -0,0 +1,64 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.info;
+
+import java.util.Date;
+
+/**
+ * Captures Logging fields required for request timing related information
+ *
+ * @author Rajiv Singla
+ */
+public interface RequestTimingLogInfo extends LogInfo {
+
+    /**
+     * Required field containing creationTimestamp when the request processing started.
+     * The value should be represented in UTC and formatted according to ISO 8601.
+     * <p>
+     * <b>Example: 2015-06-03T13:21:58+00:00</b>
+     * </p>
+     *
+     * @return request activity begin creationTimestamp
+     */
+    Date getBeginTimestamp();
+
+
+    /**
+     * Required field containing creationTimestamp when the request processed stopped.
+     * The value should be represented in UTC and formatted according to ISO 8601.
+     * <p>
+     * <b>Example: 2015-06-03T13:21:58+00:00</b>
+     * </p>
+     *
+     * @return request activity end creationTimestamp
+     */
+    Date getEndTimestamp();
+
+
+    /**
+     * Required field contains the elapsed time to complete processing of an API call or transaction request (e.g.,
+     * processing of a message that was received). This value should be the difference between EndTimestamp and
+     * BeginTimestamp fields and should be expressed in milliseconds.
+     *
+     * @return request processing elapsed time in milliseconds
+     */
+    Long getElapsedTime();
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/ResponseLogInfo.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/ResponseLogInfo.java
new file mode 100644
index 0000000..1929e7f
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/ResponseLogInfo.java
@@ -0,0 +1,81 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.info;
+
+/**
+ * Captures field required for logging Response information
+ *
+ * @author Rajiv Singla
+ */
+public interface ResponseLogInfo extends LogInfo {
+
+    /**
+     * Required field contains application-specific response codes. While error codes are
+     * application-specific, they
+     * should conform categories mentioned in table below in order to provide consistency
+     * <p>
+     * <table cellspacing=0 border=1>
+     * <tr>
+     * <th style=min-width:50px><b>Error type</b></th>
+     * <th style=min-width:50px><b>Notes</b></th>
+     * </tr>
+     * <tr>
+     * <td style=min-width:50px>0</td>
+     * <td style=min-width:50px>Success</td>
+     * </tr>
+     * <tr>
+     * <td style=min-width:50px>100</td>
+     * <td style=min-width:50px>Permission errors</td>
+     * </tr>
+     * <tr>
+     * <td style=min-width:50px>200</td>
+     * <td style=min-width:50px>Availability errors/Timeouts</td>
+     * </tr>
+     * <tr>
+     * <td style=min-width:50px>300</td>
+     * <td style=min-width:50px>Data errors</td>
+     * </tr>
+     * <tr>
+     * <td style=min-width:50px>400</td>
+     * <td style=min-width:50px>Schema errors</td>
+     * </tr>
+     * <tr>
+     * <td style=min-width:50px>500</td>
+     * <td style=min-width:50px>Business process errors</td>
+     * </tr>
+     * <tr>
+     * <td style=min-width:50px>900</td>
+     * <td style=min-width:50px>Unknown Errors</td>
+     * </tr>
+     * </table>
+     *
+     * @return application-specific error code
+     */
+    Integer getResponseCode();
+
+
+    /**
+     * Required field contains a human readable description of the {@link #getResponseCode()}.
+     *
+     * @return human readable description of the response code
+     */
+    String getResponseDescription();
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/ServiceLogInfo.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/ServiceLogInfo.java
new file mode 100644
index 0000000..0287cef
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/ServiceLogInfo.java
@@ -0,0 +1,61 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.info;
+
+/**
+ * Captures information about logging fields for application acting as service and handling requests from other
+ * applications
+ *
+ * @author Rajiv Singla
+ */
+public interface ServiceLogInfo extends LogInfo {
+
+    /**
+     * Required field contains the developer given name of the ecomp component's exposed api (~='method', function')
+     * invoked. For example if the application is exposing a REST interface and exposing runtime metrics then the
+     * service name can be: appName-getMetrics
+     *
+     * @return name of the API invoked by the application
+     */
+    String getServiceName();
+
+
+    /**
+     * Optional field contains the name of the client or user invoking the service.
+     * It may be an application, user name or mech id.
+     *
+     * @return name of the client or user invoking the API if known
+     */
+    String getPartnerName();
+
+
+    /**
+     * Optional field contains requesting remote client application’s IP address. Use UNKNOWN or an empty string if not
+     * available.
+     *
+     * @return remote client application’s IP address
+     */
+    String getClientIPAddress();
+
+
+}
+
+
+
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/TargetServiceLogInfo.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/TargetServiceLogInfo.java
new file mode 100644
index 0000000..d9b1f98
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/TargetServiceLogInfo.java
@@ -0,0 +1,54 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.info;
+
+/**
+ * Captures fields for logging application which is calling an external/target service
+ *
+ * @author Rajiv Singla
+ */
+public interface TargetServiceLogInfo extends LogInfo {
+
+    /**
+     * Required field containing name of EELF component/sub component or non-EELF entity which is invoked by the
+     * logging application
+     *
+     * @return target entity name which is invoked by the logging application
+     */
+    String getTargetEntity();
+
+
+    /**
+     * Required field containing name of External API/operation activities invoked on {@link #getTargetEntity()}
+     *
+     * @return target service name invoked by the logging application
+     */
+    String getTargetServiceName();
+
+
+    /**
+     * Optional field containing target VNF or VM being acted upon by the logging application. This field contains the
+     * virtual entity that is the target of the action for example the FQDN of the target virtual entity
+     *
+     * @return target Virtual Entity
+     */
+    String getTargetVirtualEntity();
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/package-info.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/package-info.java
new file mode 100644
index 0000000..45bddd1
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/info/package-info.java
@@ -0,0 +1,28 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+/**
+ *  Captures EELF logging information about various types.
+ *  <p>
+ *  The logging information is segregated into various information different types as to their relevance in particular
+ *  cases.
+ *
+ *  @author Rajiv Singla
+ */
+package org.onap.dcae.utils.eelf.logger.api.info;
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/AuditLog.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/AuditLog.java
new file mode 100644
index 0000000..952176e
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/AuditLog.java
@@ -0,0 +1,130 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.log;
+
+
+import org.onap.dcae.utils.eelf.logger.api.info.LogLevelCategory;
+import org.onap.dcae.utils.eelf.logger.api.spec.AuditLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+
+/**
+ * Audit Log captures all log levels supported by audit specifications
+ *
+ * @author Rajiv Singla
+ */
+public interface AuditLog {
+
+    /**
+     * Logs audit message with provided {@link LogLevelCategory}
+     *
+     * @param logLevelCategory log level category
+     * @param message log message
+     * @param auditLogSpec audit log spec
+     * @param optionalLogSpec optional log spec
+     * @param args argument values for log message interpolation
+     */
+    void log(LogLevelCategory logLevelCategory, String message, AuditLogSpec auditLogSpec,
+             OptionalLogSpec optionalLogSpec, String... args);
+
+    /**
+     * Logs audit message with provided {@link LogLevelCategory} and with default {@link OptionalLogSpec}
+     *
+     * @param logLevelCategory log level category
+     * @param message log message
+     * @param auditLogSpec audit log spec
+     * @param args argument values for log message interpolation
+     */
+    void log(LogLevelCategory logLevelCategory, String message, AuditLogSpec auditLogSpec, String... args);
+
+
+    /**
+     * Logs audit message with provided INFO {@link LogLevelCategory}
+     *
+     * @param message log message
+     * @param auditLogSpec audit log spec
+     * @param args argument values for log message interpolation
+     */
+    void info(String message, AuditLogSpec auditLogSpec, OptionalLogSpec optionalLogSpec, String... args);
+
+    /**
+     * Logs audit message with provided INFO {@link LogLevelCategory} and with default {@link OptionalLogSpec}
+     *
+     * @param message log message
+     * @param auditLogSpec audit log spec
+     * @param args argument values for log message interpolation
+     */
+    void info(String message, AuditLogSpec auditLogSpec, String... args);
+
+
+    /**
+     * Logs audit message with provided WARN {@link LogLevelCategory}
+     *
+     * @param message log message
+     * @param auditLogSpec audit log spec
+     * @param args argument values for log message interpolation
+     */
+    void warn(String message, AuditLogSpec auditLogSpec, OptionalLogSpec optionalLogSpec, String... args);
+
+    /**
+     * Logs audit message with provided WARN {@link LogLevelCategory} and with default {@link OptionalLogSpec}
+     *
+     * @param message log message
+     * @param auditLogSpec audit log spec
+     * @param args argument values for log message interpolation
+     */
+    void warn(String message, AuditLogSpec auditLogSpec, String... args);
+
+    /**
+     * Logs audit message with provided ERROR {@link LogLevelCategory}
+     *
+     * @param message log message
+     * @param auditLogSpec audit log spec
+     * @param args argument values for log message interpolation
+     */
+    void error(String message, AuditLogSpec auditLogSpec, OptionalLogSpec optionalLogSpec, String... args);
+
+    /**
+     * Logs audit message with provided ERROR {@link LogLevelCategory} and with default {@link OptionalLogSpec}
+     *
+     * @param message log message
+     * @param auditLogSpec audit log spec
+     * @param args argument values for log message interpolation
+     */
+    void error(String message, AuditLogSpec auditLogSpec, String... args);
+
+    /**
+     * Logs audit message with provided FATAL {@link LogLevelCategory}
+     *
+     * @param message log message
+     * @param auditLogSpec audit log spec
+     * @param args argument values for log message interpolation
+     */
+    void fatal(String message, AuditLogSpec auditLogSpec, OptionalLogSpec optionalLogSpec, String... args);
+
+    /**
+     * Logs audit message with provided FATAL {@link LogLevelCategory} and with default {@link OptionalLogSpec}
+     *
+     * @param message log message
+     * @param auditLogSpec audit log spec
+     * @param args argument values for log message interpolation
+     */
+    void fatal(String message, AuditLogSpec auditLogSpec, String... args);
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/DebugLog.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/DebugLog.java
new file mode 100644
index 0000000..98a0921
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/DebugLog.java
@@ -0,0 +1,76 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.log;
+
+import org.onap.dcae.utils.eelf.logger.api.info.LogLevelCategory;
+import org.onap.dcae.utils.eelf.logger.api.spec.DebugLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+
+/**
+ * Debug Log captures all log levels supported by debug specifications.
+ * <p>
+ * <b>NOTE: DEBUG Log is optional as per EELF Specifications</b>
+ *
+ * @author Rajiv Singla
+ */
+public interface DebugLog {
+
+    /**
+     * Logs debug message with provided {@link LogLevelCategory}
+     *
+     * @param logLevelCategory log level category
+     * @param message log message
+     * @param debugLogSpec debug log spec
+     * @param optionalLogSpec optional log spec
+     * @param args argument values for log message interpolation
+     */
+    void log(LogLevelCategory logLevelCategory, String message, DebugLogSpec debugLogSpec,
+             OptionalLogSpec optionalLogSpec, String... args);
+
+    /**
+     * Logs debug message with provided {@link LogLevelCategory} and with default {@link OptionalLogSpec}
+     *
+     * @param logLevelCategory log level category
+     * @param message log message
+     * @param debugLogSpec debug log spec
+     * @param args argument values for log message interpolation
+     */
+    void log(LogLevelCategory logLevelCategory, String message, DebugLogSpec debugLogSpec, String... args);
+
+
+    /**
+     * Logs debug message with provided DEBUG {@link LogLevelCategory}
+     *
+     * @param message log message
+     * @param debugLogSpec debug log spec
+     * @param args argument values for log message interpolation
+     */
+    void debug(String message, DebugLogSpec debugLogSpec, OptionalLogSpec optionalLogSpec, String... args);
+
+    /**
+     * Logs debug message with provided DEBUG {@link LogLevelCategory} and with default {@link OptionalLogSpec}
+     *
+     * @param message log message
+     * @param debugLogSpec debug log spec
+     * @param args argument values for log message interpolation
+     */
+    void debug(String message, DebugLogSpec debugLogSpec, String... args);
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/EELFLogFactory.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/EELFLogFactory.java
new file mode 100644
index 0000000..2cfb2ec
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/EELFLogFactory.java
@@ -0,0 +1,85 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.log;
+
+
+import org.onap.dcae.utils.eelf.logger.api.noop.NoOpEELFLogger;
+
+import java.lang.reflect.InvocationTargetException;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.ServiceLoader;
+import java.util.WeakHashMap;
+
+/**
+ * EELF Log Factory uses {@link ServiceLoader} to load implementations of {@link EELFLogger} in application
+ * classpath. If no EELF Logging implementations are found - eelf logging is disabled and {@link NoOpEELFLogger}
+ * is used.
+ *
+ * @author Rajiv Singla
+ */
+public class EELFLogFactory {
+
+    private static final ServiceLoader<EELFLogger> SERVICE_LOADER = ServiceLoader.load(EELFLogger.class);
+    private static final Map<Class<?>, EELFLogger> LOGGER_CACHE = new WeakHashMap<>(64);
+
+    private static List<EELFLogger> loggerImplementations = new LinkedList<>();
+
+    static {
+
+        for (EELFLogger loggerImplementation : SERVICE_LOADER) {
+            loggerImplementations.add(loggerImplementation);
+        }
+
+        if (loggerImplementations.isEmpty()) {
+            System.err.println(
+                    "EELF LOGGING ERROR: Unable to find any EELF Logger Implementations in the classpath.");
+            System.err.println("=============EELF LOGGING IS DISABLED================");
+            loggerImplementations.add(NoOpEELFLogger.getInstance());
+        }
+
+    }
+
+    private EELFLogFactory() {
+        // private constructor
+    }
+
+    public static <T> EELFLogger getLogger(Class<T> clazz) {
+
+        if (LOGGER_CACHE.get(clazz) != null) {
+            return LOGGER_CACHE.get(clazz);
+        }
+
+        EELFLogger EELFLogger = null;
+        try {
+            EELFLogger = loggerImplementations.get(0).getClass().getConstructor(Class.class)
+                    .newInstance(clazz);
+            return EELFLogger;
+
+        } catch (
+                InstantiationException | IllegalAccessException | InvocationTargetException | NoSuchMethodException e) {
+            throw new IllegalStateException("Error while Creating EELF Logger", e);
+        }
+
+    }
+
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/EELFLogger.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/EELFLogger.java
new file mode 100644
index 0000000..500d814
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/EELFLogger.java
@@ -0,0 +1,67 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.log;
+
+/**
+ * EELF Logger is main abstraction which applications use to log EELF Compliant log messages
+ *
+ * @author Rajiv Singla
+ */
+public interface EELFLogger {
+
+    /**
+     * Provides Audit Log
+     *
+     * @return Audit log
+     */
+    AuditLog auditLog();
+
+
+    /**
+     * Provides Metric Log
+     *
+     * @return metric log
+     */
+    MetricLog metricLog();
+
+    /**
+     * Provides Error Log
+     *
+     * @return error log
+     */
+    ErrorLog errorLog();
+
+
+    /**
+     * Provides Debug Log
+     *
+     * @return debug log
+     */
+    DebugLog debugLog();
+
+    /**
+     * Provides logging context
+     *
+     * @return logging context
+     */
+    EELFLoggerContext loggingContext();
+
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/EELFLoggerContext.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/EELFLoggerContext.java
new file mode 100644
index 0000000..5910da5
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/EELFLoggerContext.java
@@ -0,0 +1,56 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.log;
+
+
+import org.onap.dcae.utils.eelf.logger.api.spec.AppLogSpec;
+
+/**
+ * EELF Logger Context contains fields are set during application creation time and are fixed for the entire
+ * duration of the application lifetime
+ *
+ * @author Rajiv Singla
+ */
+public interface EELFLoggerContext {
+
+    /**
+     * Returns App Log Spec
+     *
+     * @return current app log spec
+     */
+    AppLogSpec getAppLogSpec();
+
+
+    /**
+     * Sets new App Log Spec
+     *
+     * @param appLogSpec new app log spec
+     */
+    void setAppLogSpec(AppLogSpec appLogSpec);
+
+
+    /**
+     * Returns true if logging context is already initialized
+     *
+     * @return true if logger context is already initialized
+     */
+    boolean isInitialized();
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/ErrorLog.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/ErrorLog.java
new file mode 100644
index 0000000..6b27755
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/ErrorLog.java
@@ -0,0 +1,93 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.log;
+
+
+import org.onap.dcae.utils.eelf.logger.api.info.LogLevelCategory;
+import org.onap.dcae.utils.eelf.logger.api.spec.ErrorLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+
+/**
+ * @author Rajiv Singla
+ */
+public interface ErrorLog {
+
+    /**
+     * Logs error message with provided {@link LogLevelCategory}
+     *
+     * @param logLevelCategory log level category
+     * @param message log message
+     * @param errorLogSpec error log spec
+     * @param optionalLogSpec optional log spec
+     * @param args argument values for log message interpolation
+     */
+    void log(LogLevelCategory logLevelCategory, String message, ErrorLogSpec errorLogSpec,
+             OptionalLogSpec optionalLogSpec, String... args);
+
+    /**
+     * Logs error message with provided {@link LogLevelCategory} and with default {@link OptionalLogSpec}
+     *
+     * @param logLevelCategory log level category
+     * @param message log message
+     * @param errorLogSpec error log spec
+     * @param args argument values for log message interpolation
+     */
+    void log(LogLevelCategory logLevelCategory, String message, ErrorLogSpec errorLogSpec, String... args);
+
+
+    /**
+     * Logs error message with ERROR {@link LogLevelCategory}
+     *
+     * @param message log message
+     * @param errorLogSpec error log spec
+     * @param args argument values for log message interpolation
+     */
+    void error(String message, ErrorLogSpec errorLogSpec, OptionalLogSpec optionalLogSpec, String... args);
+
+    /**
+     * Logs error message with ERROR {@link LogLevelCategory} and with default {@link OptionalLogSpec}
+     *
+     * @param message log message
+     * @param errorLogSpec error log spec
+     * @param args argument values for log message interpolation
+     */
+    void error(String message, ErrorLogSpec errorLogSpec, String... args);
+
+
+    /**
+     * Logs error message with WARN {@link LogLevelCategory}
+     *
+     * @param message log message
+     * @param errorLogSpec error log spec
+     * @param args argument values for log message interpolation
+     */
+    void warn(String message, ErrorLogSpec errorLogSpec, OptionalLogSpec optionalLogSpec, String... args);
+
+    /**
+     * Logs error message with WARN {@link LogLevelCategory} and with default {@link OptionalLogSpec}
+     *
+     * @param message log message
+     * @param errorLogSpec error log spec
+     * @param args argument values for log message interpolation
+     */
+    void warn(String message, ErrorLogSpec errorLogSpec, String... args);
+
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/MetricLog.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/MetricLog.java
new file mode 100644
index 0000000..ebc33ca
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/MetricLog.java
@@ -0,0 +1,130 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.log;
+
+
+import org.onap.dcae.utils.eelf.logger.api.info.LogLevelCategory;
+import org.onap.dcae.utils.eelf.logger.api.spec.MetricLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+
+/**
+ * Metric Log captures all log levels supported by metric specifications
+ *
+ * @author Rajiv Singla
+ */
+public interface MetricLog {
+
+    /**
+     * Logs metric message with provided {@link LogLevelCategory}
+     *
+     * @param logLevelCategory log level category
+     * @param message log message
+     * @param metricLogSpec metric log spec
+     * @param optionalLogSpec optional log spec
+     * @param args argument values for log message interpolation
+     */
+    void log(LogLevelCategory logLevelCategory, String message, MetricLogSpec metricLogSpec,
+             OptionalLogSpec optionalLogSpec, String... args);
+
+    /**
+     * Logs metric message with provided {@link LogLevelCategory} and with default {@link OptionalLogSpec}
+     *
+     * @param logLevelCategory log level category
+     * @param message log message
+     * @param metricLogSpec metric log spec
+     * @param args argument values for log message interpolation
+     */
+    void log(LogLevelCategory logLevelCategory, String message, MetricLogSpec metricLogSpec, String... args);
+
+
+    /**
+     * Logs metric message with provided INFO {@link LogLevelCategory}
+     *
+     * @param message log message
+     * @param metricLogSpec metric log spec
+     * @param args argument values for log message interpolation
+     */
+    void info(String message, MetricLogSpec metricLogSpec, OptionalLogSpec optionalLogSpec, String... args);
+
+    /**
+     * Logs metric message with provided INFO {@link LogLevelCategory} and with default {@link OptionalLogSpec}
+     *
+     * @param message log message
+     * @param metricLogSpec metric log spec
+     * @param args argument values for log message interpolation
+     */
+    void info(String message, MetricLogSpec metricLogSpec, String... args);
+
+
+    /**
+     * Logs metric message with provided WARN {@link LogLevelCategory}
+     *
+     * @param message log message
+     * @param metricLogSpec metric log spec
+     * @param args argument values for log message interpolation
+     */
+    void warn(String message, MetricLogSpec metricLogSpec, OptionalLogSpec optionalLogSpec, String... args);
+
+    /**
+     * Logs metric message with provided WARN {@link LogLevelCategory} and with default {@link OptionalLogSpec}
+     *
+     * @param message log message
+     * @param metricLogSpec metric log spec
+     * @param args argument values for log message interpolation
+     */
+    void warn(String message, MetricLogSpec metricLogSpec, String... args);
+
+    /**
+     * Logs metric message with provided ERROR {@link LogLevelCategory}
+     *
+     * @param message log message
+     * @param metricLogSpec metric log spec
+     * @param args argument values for log message interpolation
+     */
+    void error(String message, MetricLogSpec metricLogSpec, OptionalLogSpec optionalLogSpec, String... args);
+
+    /**
+     * Logs metric message with provided ERROR {@link LogLevelCategory} and with default {@link OptionalLogSpec}
+     *
+     * @param message log message
+     * @param metricLogSpec metric log spec
+     * @param args argument values for log message interpolation
+     */
+    void error(String message, MetricLogSpec metricLogSpec, String... args);
+
+    /**
+     * Logs metric message with provided FATAL {@link LogLevelCategory}
+     *
+     * @param message log message
+     * @param metricLogSpec metric log spec
+     * @param args argument values for log message interpolation
+     */
+    void fatal(String message, MetricLogSpec metricLogSpec, OptionalLogSpec optionalLogSpec, String... args);
+
+    /**
+     * Logs metric message with provided FATAL {@link LogLevelCategory} and with default {@link OptionalLogSpec}
+     *
+     * @param message log message
+     * @param metricLogSpec metric log spec
+     * @param args argument values for log message interpolation
+     */
+    void fatal(String message, MetricLogSpec metricLogSpec, String... args);
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/package-info.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/package-info.java
new file mode 100644
index 0000000..e24ccc9
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/log/package-info.java
@@ -0,0 +1,23 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+/**
+ * Contains Logging API contracts for various EELF Logs (e.g. Audit, Metric, Error, Debug etc)
+ */
+package org.onap.dcae.utils.eelf.logger.api.log;
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/noop/NoOpAuditLog.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/noop/NoOpAuditLog.java
new file mode 100644
index 0000000..6c1c583
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/noop/NoOpAuditLog.java
@@ -0,0 +1,90 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.noop;
+
+
+import org.onap.dcae.utils.eelf.logger.api.info.LogLevelCategory;
+import org.onap.dcae.utils.eelf.logger.api.log.AuditLog;
+import org.onap.dcae.utils.eelf.logger.api.spec.AuditLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+
+/**
+ * A no operation implementation of AuditLog
+ *
+ * @author Rajiv Singla
+ */
+public class NoOpAuditLog implements AuditLog {
+
+    @Override
+    public void log(final LogLevelCategory logLevelCategory, final String message, final AuditLogSpec auditLogSpec,
+                    final OptionalLogSpec optionalLogSpec, final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void log(final LogLevelCategory logLevelCategory, final String message, final AuditLogSpec auditLogSpec,
+                    final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void info(final String message, final AuditLogSpec auditLogSpec, final OptionalLogSpec optionalLogSpec,
+                     final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void info(final String message, final AuditLogSpec auditLogSpec, final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void warn(final String message, final AuditLogSpec auditLogSpec, final OptionalLogSpec optionalLogSpec,
+                     final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void warn(final String message, final AuditLogSpec auditLogSpec, final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void error(final String message, final AuditLogSpec auditLogSpec, final OptionalLogSpec optionalLogSpec,
+                      final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void error(final String message, final AuditLogSpec auditLogSpec, final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void fatal(final String message, final AuditLogSpec auditLogSpec, final OptionalLogSpec optionalLogSpec,
+                      final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void fatal(final String message, final AuditLogSpec auditLogSpec, final String... args) {
+        // no operation
+    }
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/noop/NoOpDebugLog.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/noop/NoOpDebugLog.java
new file mode 100644
index 0000000..dd36b52
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/noop/NoOpDebugLog.java
@@ -0,0 +1,56 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.noop;
+
+
+import org.onap.dcae.utils.eelf.logger.api.info.LogLevelCategory;
+import org.onap.dcae.utils.eelf.logger.api.log.DebugLog;
+import org.onap.dcae.utils.eelf.logger.api.spec.DebugLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+
+/**
+ * A no operation implementation of Debug Log
+ *
+ * @author Rajiv Singla
+ */
+public class NoOpDebugLog implements DebugLog {
+    @Override
+    public void log(final LogLevelCategory logLevelCategory, final String message, final DebugLogSpec debugLogSpec,
+                    final OptionalLogSpec optionalLogSpec, final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void log(final LogLevelCategory logLevelCategory, final String message, final DebugLogSpec debugLogSpec,
+                    final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void debug(final String message, final DebugLogSpec debugLogSpec, final OptionalLogSpec optionalLogSpec,
+                      final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void debug(final String message, final DebugLogSpec debugLogSpec, final String... args) {
+        // no operation
+    }
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/noop/NoOpEELFLogger.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/noop/NoOpEELFLogger.java
new file mode 100644
index 0000000..c761ba1
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/noop/NoOpEELFLogger.java
@@ -0,0 +1,77 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.noop;
+
+
+import org.onap.dcae.utils.eelf.logger.api.log.AuditLog;
+import org.onap.dcae.utils.eelf.logger.api.log.DebugLog;
+import org.onap.dcae.utils.eelf.logger.api.log.EELFLogger;
+import org.onap.dcae.utils.eelf.logger.api.log.EELFLoggerContext;
+import org.onap.dcae.utils.eelf.logger.api.log.ErrorLog;
+import org.onap.dcae.utils.eelf.logger.api.log.MetricLog;
+
+/**
+ * A no operation implementation of {@link EELFLogger}
+ *
+ * @author Rajiv Singla
+ */
+public class NoOpEELFLogger implements EELFLogger {
+
+    private static final AuditLog NO_OP_AUDIT_LOG = new NoOpAuditLog();
+    private static final MetricLog NO_OP_METRIC_LOG = new NoOpMetricLog();
+    private static final ErrorLog NO_OP_ERROR_LOG = new NoOpErrorLog();
+    private static final DebugLog NO_OP_DEBUG_LOG = new NoOpDebugLog();
+
+    private static final NoOpEELFLogger NO_OP_EELF_LOGGER = new NoOpEELFLogger();
+
+    private NoOpEELFLogger() {
+        // private constructor
+    }
+
+    public static NoOpEELFLogger getInstance() {
+        return NO_OP_EELF_LOGGER;
+    }
+
+    @Override
+    public AuditLog auditLog() {
+        return NO_OP_AUDIT_LOG;
+    }
+
+    @Override
+    public MetricLog metricLog() {
+        return NO_OP_METRIC_LOG;
+    }
+
+    @Override
+    public ErrorLog errorLog() {
+        return NO_OP_ERROR_LOG;
+    }
+
+    @Override
+    public DebugLog debugLog() {
+        return NO_OP_DEBUG_LOG;
+    }
+
+    @Override
+    public EELFLoggerContext loggingContext() {
+        return null;
+    }
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/noop/NoOpErrorLog.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/noop/NoOpErrorLog.java
new file mode 100644
index 0000000..c1b4e13
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/noop/NoOpErrorLog.java
@@ -0,0 +1,68 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.noop;
+
+
+import org.onap.dcae.utils.eelf.logger.api.info.LogLevelCategory;
+import org.onap.dcae.utils.eelf.logger.api.log.ErrorLog;
+import org.onap.dcae.utils.eelf.logger.api.spec.ErrorLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+
+/**
+ * A no operation implementation of Error Log
+ *
+ * @author Rajiv Singla
+ */
+public class NoOpErrorLog implements ErrorLog {
+
+    @Override
+    public void log(final LogLevelCategory logLevelCategory, final String message, final ErrorLogSpec errorLogSpec,
+                    final OptionalLogSpec optionalLogSpec, final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void log(final LogLevelCategory logLevelCategory, final String message, final ErrorLogSpec errorLogSpec,
+                    final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void error(final String message, final ErrorLogSpec errorLogSpec, final OptionalLogSpec optionalLogSpec,
+                      final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void error(final String message, final ErrorLogSpec errorLogSpec, final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void warn(final String message, final ErrorLogSpec errorLogSpec, final OptionalLogSpec optionalLogSpec,
+                     final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void warn(final String message, final ErrorLogSpec errorLogSpec, final String... args) {
+        // no operation
+    }
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/noop/NoOpMetricLog.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/noop/NoOpMetricLog.java
new file mode 100644
index 0000000..1c67862
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/noop/NoOpMetricLog.java
@@ -0,0 +1,89 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.noop;
+
+
+import org.onap.dcae.utils.eelf.logger.api.info.LogLevelCategory;
+import org.onap.dcae.utils.eelf.logger.api.log.MetricLog;
+import org.onap.dcae.utils.eelf.logger.api.spec.MetricLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+
+/**
+ * A no operation implementation of Metric Log
+ *
+ * @author Rajiv Singla
+ */
+public class NoOpMetricLog implements MetricLog {
+    @Override
+    public void log(final LogLevelCategory logLevelCategory, final String message, final MetricLogSpec metricLogSpec,
+                    final OptionalLogSpec optionalLogSpec, final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void log(final LogLevelCategory logLevelCategory, final String message, final MetricLogSpec metricLogSpec,
+                    final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void info(final String message, final MetricLogSpec metricLogSpec, final OptionalLogSpec optionalLogSpec,
+                     final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void info(final String message, final MetricLogSpec metricLogSpec, final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void warn(final String message, final MetricLogSpec metricLogSpec, final OptionalLogSpec optionalLogSpec,
+                     final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void warn(final String message, final MetricLogSpec metricLogSpec, final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void error(final String message, final MetricLogSpec metricLogSpec, final OptionalLogSpec optionalLogSpec,
+                      final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void error(final String message, final MetricLogSpec metricLogSpec, final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void fatal(final String message, final MetricLogSpec metricLogSpec, final OptionalLogSpec optionalLogSpec,
+                      final String... args) {
+        // no operation
+    }
+
+    @Override
+    public void fatal(final String message, final MetricLogSpec metricLogSpec, final String... args) {
+        // no operation
+    }
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/noop/package-info.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/noop/package-info.java
new file mode 100644
index 0000000..f7ed917
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/noop/package-info.java
@@ -0,0 +1,26 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+/**
+ *  Contains no operation implementation of EELF Logging API. Generally used as a fallback when no EELF Logging
+ *  implementation is detected in the application classpath
+ *
+ *  @author Rajiv Singla
+ */
+package org.onap.dcae.utils.eelf.logger.api.noop;
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/AppLogSpec.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/AppLogSpec.java
new file mode 100644
index 0000000..83643fb
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/AppLogSpec.java
@@ -0,0 +1,32 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.spec;
+
+
+import org.onap.dcae.utils.eelf.logger.api.info.AppLogInfo;
+
+/**
+ * App Log spec captures fields which are fixed for the duration of application once its instance is created. They
+ * should be populated for all specifications regardless of if they are relevant to that specification
+ *
+ * @author Rajiv Singla
+ */
+public interface AppLogSpec extends AppLogInfo {
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/AuditLogSpec.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/AuditLogSpec.java
new file mode 100644
index 0000000..46360b1
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/AuditLogSpec.java
@@ -0,0 +1,42 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.spec;
+
+
+import org.onap.dcae.utils.eelf.logger.api.info.RequestIdLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.RequestTimingLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.ResponseLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.ServiceLogInfo;
+
+/**
+ * Captures fields required for EELF Audit Log Specification.
+ *
+ * @author Rajiv Singla
+ */
+public interface AuditLogSpec extends
+        // request id must be preset for all log specifications
+        RequestIdLogInfo,
+        // duration related fields
+        RequestTimingLogInfo,
+        // app acting as a service fields
+        ServiceLogInfo, ResponseLogInfo {
+
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/DebugLogSpec.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/DebugLogSpec.java
new file mode 100644
index 0000000..ac4bd64
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/DebugLogSpec.java
@@ -0,0 +1,34 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.spec;
+
+
+import org.onap.dcae.utils.eelf.logger.api.info.RequestIdLogInfo;
+
+/**
+ * Captures fields required for EELF Debug Log Specification.
+ * NOTE: As per specification debug log is optional
+ *
+ * @author Rajiv Singla
+ */
+public interface DebugLogSpec extends
+        // request id must be preset for all log specifications
+        RequestIdLogInfo {
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/ErrorLogSpec.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/ErrorLogSpec.java
new file mode 100644
index 0000000..455f433
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/ErrorLogSpec.java
@@ -0,0 +1,42 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.spec;
+
+
+import org.onap.dcae.utils.eelf.logger.api.info.ErrorLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.RequestIdLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.ServiceLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.TargetServiceLogInfo;
+
+/**
+ * Captures fields required for EELF Error Log Specification
+ *
+ * @author Rajiv Singla
+ */
+public interface ErrorLogSpec extends
+        // request id must be preset for all log specifications
+        RequestIdLogInfo,
+        // app acting as a service fields
+        ServiceLogInfo,
+        // app calling external service fields
+        TargetServiceLogInfo,
+        // error details fields
+        ErrorLogInfo {
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/MetricLogSpec.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/MetricLogSpec.java
new file mode 100644
index 0000000..5b5f698
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/MetricLogSpec.java
@@ -0,0 +1,36 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.spec;
+
+
+import org.onap.dcae.utils.eelf.logger.api.info.TargetServiceLogInfo;
+
+/**
+ * Captures fields required for EELF Metric Log Specification.
+ *
+ * @author Rajiv Singla
+ */
+public interface MetricLogSpec extends
+        // Audit log spec
+        AuditLogSpec,
+        // App calling external service fields
+        TargetServiceLogInfo {
+
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/OptionalLogSpec.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/OptionalLogSpec.java
new file mode 100644
index 0000000..dac08ab
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/OptionalLogSpec.java
@@ -0,0 +1,39 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.api.spec;
+
+import org.onap.dcae.utils.eelf.logger.api.info.CodeLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.CustomFieldsLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.MessageLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.MiscLogInfo;
+
+/**
+ * Captures fields which are optional or derived from other fields
+ *
+ * @author Rajiv Singla
+ */
+public interface OptionalLogSpec extends
+        // message fields are mostly auto generated or can be derived from other fields
+        MessageLogInfo,
+        // Code log info can be derived by the underlying logging framework or provided optionally by the app
+        CodeLogInfo,
+        // custom and misc log info are mostly optional
+        CustomFieldsLogInfo, MiscLogInfo {
+}
diff --git a/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/package-info.java b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/package-info.java
new file mode 100644
index 0000000..b4c1df8
--- /dev/null
+++ b/eelf-logger/eelf-logger-api/src/main/java/org/onap/dcae/utils/eelf/logger/api/spec/package-info.java
@@ -0,0 +1,28 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+/**
+ * Contains various EELF Logging Specifications.
+ * <p>
+ * Some specifications are fixed for the whole duration of the
+ * application, some specification are either optional or derived and some are required for particular EELF Logging
+ * specification. These logging specification are composed of various logging information in
+ * {@link org.onap.dcae.utils.eelf.logger.api.info} package
+ */
+package org.onap.dcae.utils.eelf.logger.api.spec;
diff --git a/eelf-logger/eelf-logger-logback-impl/pom.xml b/eelf-logger/eelf-logger-logback-impl/pom.xml
new file mode 100644
index 0000000..165d216
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/pom.xml
@@ -0,0 +1,62 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ ================================================================================
+  ~ Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+  ~ ================================================================================
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~ ============LICENSE_END=========================================================
+  ~
+  -->
+
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xmlns="http://maven.apache.org/POM/4.0.0"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.onap.dcaegen2.utils</groupId>
+        <artifactId>eelf-logger</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>eelf-logger-logback-impl</artifactId>
+    <packaging>jar</packaging>
+
+    <!-- EELF LOGGING IMPLEMENTATION BACKED BY LOGBACK LOGGING FRAMEWORK-->
+    <name>dcaegen2-utils-eelf-logger-logback-impl</name>
+    <description>Implements EEL Logging Specification using Logback</description>
+
+    <properties>
+        <main.basedir>${project.parent.basedir}</main.basedir>
+    </properties>
+
+    <dependencies>
+
+        <!-- ECOMP LOGGER MODEL -->
+        <dependency>
+            <groupId>${project.groupId}</groupId>
+            <artifactId>eelf-logger-model</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+
+        <!-- LOGBACK -->
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+        </dependency>
+
+    </dependencies>
+
+
+</project>
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/EELFLoggerDefaults.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/EELFLoggerDefaults.java
new file mode 100644
index 0000000..eceaf20
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/EELFLoggerDefaults.java
@@ -0,0 +1,105 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback;
+
+
+import org.onap.dcae.utils.eelf.logger.api.info.LogInfo;
+import org.onap.dcae.utils.eelf.logger.model.info.AppLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.CustomFieldsLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.ErrorLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.MiscLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.RequestTimingLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.ResponseLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.ServiceLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.TargetServiceLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.spec.OptionalLogSpecImpl;
+
+import java.util.Date;
+
+import static org.onap.dcae.utils.eelf.logger.logback.utils.LogUtils.createDefaultAppLogInfo;
+
+
+/**
+ * This utility class various default implementations for EELF Logger. Users should use these default rather then
+ * creating their own {@link LogInfo} objects.
+ *
+ * @author Rajiv Singla
+ */
+public class EELFLoggerDefaults {
+
+    private static final String UNKNOWN_FIELD_VALUE = "UNKNOWN";
+
+    // =============== APP LOG SPEC ======================//
+    /**
+     * Provides Default {@link AppLogInfoImpl}
+     */
+    public static final AppLogInfoImpl DEFAULT_APP_LOG_INFO = createDefaultAppLogInfo();
+
+
+    // =============== AUDIT LOG SPEC ===================== //
+
+    private static final String DEFAULT_PARTNER_NAME =
+            System.getProperty("user.name") != null ? System.getProperty("user.name") : UNKNOWN_FIELD_VALUE;
+
+    public static final ServiceLogInfoImpl DEFAULT_SERVICE_LOG_INFO =
+            new ServiceLogInfoImpl(UNKNOWN_FIELD_VALUE, DEFAULT_PARTNER_NAME, "");
+
+
+    public static final RequestTimingLogInfoImpl DEFAULT_REQUEST_TIMING_LOG_INFO =
+            new RequestTimingLogInfoImpl(new Date(), new Date(), null);
+
+
+    public static final ResponseLogInfoImpl DEFAULT_RESPONSE_LOG_INFO =
+            new ResponseLogInfoImpl(900, "UNDEFINED");
+
+
+    // =============== METRIC LOG SPEC ===================== //
+
+    public static final TargetServiceLogInfoImpl DEFAULT_TARGET_SERVICE_LOG_INFO =
+            new TargetServiceLogInfoImpl(UNKNOWN_FIELD_VALUE, UNKNOWN_FIELD_VALUE, UNKNOWN_FIELD_VALUE);
+
+    // =============== ERROR LOG SPEC ===================== //
+
+    public static final ErrorLogInfoImpl DEFAULT_ERROR_LOG_INFO =
+            new ErrorLogInfoImpl(900, "UNDEFINED ERROR");
+
+
+    // ============= OPTIONAL LOG SPEC =================== //
+
+    /**
+     * Provides Default {@link CustomFieldsLogInfoImpl}
+     */
+    public static final CustomFieldsLogInfoImpl DEFAULT_CUSTOM_FIELDS_LOG_INFO =
+            new CustomFieldsLogInfoImpl("", "", "", "");
+
+    /**
+     * Provides Default {@link MiscLogInfoImpl}
+     */
+    public static final MiscLogInfoImpl DEFAULT_MISC_LOG_INFO = new MiscLogInfoImpl("", "");
+
+
+    /**
+     * Provides Default {@link OptionalLogSpecImpl}
+     */
+    public static final OptionalLogSpecImpl DEFAULT_OPTIONAL_LOG_SPEC = new OptionalLogSpecImpl(null, null,
+            DEFAULT_CUSTOM_FIELDS_LOG_INFO, DEFAULT_MISC_LOG_INFO);
+
+
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/filter/MarkerFilter.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/filter/MarkerFilter.java
new file mode 100644
index 0000000..a664190
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/filter/MarkerFilter.java
@@ -0,0 +1,71 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.filter;
+
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import ch.qos.logback.core.filter.AbstractMatcherFilter;
+import ch.qos.logback.core.spi.FilterReply;
+import org.slf4j.Marker;
+import org.slf4j.MarkerFactory;
+
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * Logback Marker filter
+ *
+ * @author Rajiv Singla
+ */
+public class MarkerFilter extends AbstractMatcherFilter<ILoggingEvent> {
+
+    private String markersString;
+    private Set<Marker> markersToAccept = new HashSet<>();
+
+    @Override
+    public FilterReply decide(final ILoggingEvent event) {
+
+        if (!isStarted()) {
+            return FilterReply.NEUTRAL;
+        }
+
+        if (markersToAccept.contains(event.getMarker())) {
+            return onMatch;
+        } else {
+            return onMismatch;
+        }
+    }
+
+    public void setMarkers(String markersString) {
+        this.markersString = markersString;
+    }
+
+
+    public void start() {
+
+        if (markersString != null && markersString.trim().split(",").length > 0) {
+
+            final String[] markerStrings = markersString.trim().split(",");
+            for (String markerString : markerStrings) {
+                markersToAccept.add(MarkerFactory.getMarker(markerString.trim()));
+            }
+            super.start();
+        }
+    }
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/layout/AuditLogLayout.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/layout/AuditLogLayout.java
new file mode 100644
index 0000000..5d848ac
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/layout/AuditLogLayout.java
@@ -0,0 +1,81 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.layout;
+
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import ch.qos.logback.core.LayoutBase;
+import org.onap.dcae.utils.eelf.logger.api.info.LogLevelCategory;
+import org.onap.dcae.utils.eelf.logger.api.spec.AppLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.AuditLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+import org.onap.dcae.utils.eelf.logger.logback.utils.LogUtils;
+
+
+/**
+ * Audit log layout generates log messages as per EELF Audit Log Specifications
+ *
+ * @author Rajiv Singla
+ */
+public class AuditLogLayout extends LayoutBase<ILoggingEvent> {
+
+    @Override
+    public String doLayout(final ILoggingEvent event) {
+
+        final AppLogSpec appLogSpec = LogUtils.getAppLogSpec();
+        final LogLevelCategory logLevelCategory = LogUtils.getLogLevelCategory();
+        final Class<?> loggerClass = LogUtils.getLoggerClass();
+        final OptionalLogSpec optionalLogSpec = LogUtils.getOptionalLogSpec(loggerClass, logLevelCategory);
+        final AuditLogSpec auditLogSpec = LogUtils.getAuditLogSpec();
+
+        final String beginTimestamp = LogUtils.formatDate(auditLogSpec.getBeginTimestamp());
+        final String endTimestamp = LogUtils.formatDate(auditLogSpec.getEndTimestamp());
+
+        final String[] auditLogValues = {
+                beginTimestamp,
+                endTimestamp,
+                auditLogSpec.getRequestId(),
+                appLogSpec.getServiceInstanceID(),
+                event.getThreadName(),
+                appLogSpec.getVirtualServerName(),
+                auditLogSpec.getServiceName(),
+                auditLogSpec.getPartnerName(),
+                optionalLogSpec.getStatusCode().name(),
+                auditLogSpec.getResponseCode().toString(),
+                auditLogSpec.getResponseDescription(),
+                appLogSpec.getInstanceUUID(),
+                logLevelCategory != null ? logLevelCategory.name() : "",
+                optionalLogSpec.getAlertSeverity().getSeverityCode(),
+                appLogSpec.getServerIPAddress(),
+                auditLogSpec.getElapsedTime().toString(),
+                appLogSpec.getServerFQDN(),
+                auditLogSpec.getClientIPAddress(),
+                optionalLogSpec.getClassName(),
+                optionalLogSpec.getUnused(),
+                optionalLogSpec.getProcessId(),
+                optionalLogSpec.getCustomField1(),
+                optionalLogSpec.getCustomField2(),
+                optionalLogSpec.getCustomField3(),
+                optionalLogSpec.getCustomField4(),
+                event.getFormattedMessage()
+        };
+
+        return LogUtils.createLogMessageString(auditLogValues);
+    }
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/layout/ConsoleLayout.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/layout/ConsoleLayout.java
new file mode 100644
index 0000000..589d863
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/layout/ConsoleLayout.java
@@ -0,0 +1,56 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.layout;
+
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import ch.qos.logback.core.LayoutBase;
+import org.onap.dcae.utils.eelf.logger.logback.utils.LogUtils;
+import org.slf4j.Marker;
+
+/**
+ * Console layout is used to log messages on the console for debugging purposes.
+ *
+ * @author Rajiv Singla
+ */
+public class ConsoleLayout extends LayoutBase<ILoggingEvent> {
+
+    private static final MetricLogLayout METRIC_LOG_LAYOUT = new MetricLogLayout();
+    private static final AuditLogLayout AUDIT_LOG_LAYOUT = new AuditLogLayout();
+    private static final ErrorLogLayout ERROR_LOG_LAYOUT = new ErrorLogLayout();
+    private static final DebugLogLayout DEBUG_LOG_LAYOUT = new DebugLogLayout();
+
+    @Override
+    public String doLayout(final ILoggingEvent event) {
+
+        final Marker eventMarker = event.getMarker();
+
+        if (eventMarker.equals(LogUtils.AUDIT_LOG_MARKER)) {
+            return AUDIT_LOG_LAYOUT.doLayout(event);
+        } else if (eventMarker.equals(LogUtils.METRIC_LOG_MARKER)) {
+            return METRIC_LOG_LAYOUT.doLayout(event);
+        } else if (eventMarker.equals(LogUtils.ERROR_LOG_MARKER)) {
+            return ERROR_LOG_LAYOUT.doLayout(event);
+        } else if (eventMarker.equals(LogUtils.DEBUG_LOG_MARKER)) {
+            return DEBUG_LOG_LAYOUT.doLayout(event);
+        }
+
+        return "Console Layout not defined for Marker: " + eventMarker;
+    }
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/layout/DebugLogLayout.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/layout/DebugLogLayout.java
new file mode 100644
index 0000000..e7b1cd4
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/layout/DebugLogLayout.java
@@ -0,0 +1,54 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.layout;
+
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import ch.qos.logback.core.LayoutBase;
+import org.onap.dcae.utils.eelf.logger.api.info.LogLevelCategory;
+import org.onap.dcae.utils.eelf.logger.api.spec.DebugLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+import org.onap.dcae.utils.eelf.logger.logback.utils.LogUtils;
+
+
+/**
+ * @author Rajiv Singla
+ */
+public class DebugLogLayout extends LayoutBase<ILoggingEvent> {
+
+    @Override
+    public String doLayout(final ILoggingEvent event) {
+
+        final LogLevelCategory logLevelCategory = LogUtils.getLogLevelCategory();
+        final Class<?> loggerClass = LogUtils.getLoggerClass();
+        final OptionalLogSpec optionalLogSpec = LogUtils.getOptionalLogSpec(loggerClass, logLevelCategory);
+
+        final DebugLogSpec debugLogSpec = LogUtils.getDebugLogSpec();
+
+        final String creationTimestamp = LogUtils.formatDate(optionalLogSpec.getCreationTimestamp());
+
+        final String[] debugLogValues = {
+                creationTimestamp,
+                debugLogSpec.getRequestId(),
+                event.getFormattedMessage()
+        };
+
+        return LogUtils.createLogMessageString(debugLogValues);
+    }
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/layout/ErrorLogLayout.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/layout/ErrorLogLayout.java
new file mode 100644
index 0000000..4eefe36
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/layout/ErrorLogLayout.java
@@ -0,0 +1,64 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.layout;
+
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import ch.qos.logback.core.LayoutBase;
+import org.onap.dcae.utils.eelf.logger.api.info.LogLevelCategory;
+import org.onap.dcae.utils.eelf.logger.api.spec.ErrorLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+import org.onap.dcae.utils.eelf.logger.logback.utils.LogUtils;
+
+
+/**
+ * Error Log Layout generates log messages as per EELF Error Log Specifications
+ *
+ * @author Rajiv Singla
+ */
+public class ErrorLogLayout extends LayoutBase<ILoggingEvent> {
+
+    @Override
+    public String doLayout(final ILoggingEvent event) {
+
+        final LogLevelCategory logLevelCategory = LogUtils.getLogLevelCategory();
+        final Class<?> loggerClass = LogUtils.getLoggerClass();
+        final OptionalLogSpec optionalLogSpec = LogUtils.getOptionalLogSpec(loggerClass, logLevelCategory);
+
+        final ErrorLogSpec errorLogSpec = LogUtils.getErrorLogSpec();
+
+        final String creationTimestamp = LogUtils.formatDate(optionalLogSpec.getCreationTimestamp());
+
+        final String[] errorLogValues = {
+                creationTimestamp,
+                errorLogSpec.getRequestId(),
+                event.getThreadName(),
+                errorLogSpec.getServiceName(),
+                errorLogSpec.getPartnerName(),
+                errorLogSpec.getTargetEntity(),
+                errorLogSpec.getTargetServiceName(),
+                logLevelCategory != null ? logLevelCategory.name() : "",
+                errorLogSpec.getErrorCode() != null ? errorLogSpec.getErrorCode().toString() : "",
+                errorLogSpec.getErrorDescription(),
+                event.getFormattedMessage()
+        };
+
+        return LogUtils.createLogMessageString(errorLogValues);
+    }
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/layout/MetricLogLayout.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/layout/MetricLogLayout.java
new file mode 100644
index 0000000..509ff8f
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/layout/MetricLogLayout.java
@@ -0,0 +1,83 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.layout;
+
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import ch.qos.logback.core.LayoutBase;
+import org.onap.dcae.utils.eelf.logger.api.info.LogLevelCategory;
+import org.onap.dcae.utils.eelf.logger.api.spec.AppLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.MetricLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+import org.onap.dcae.utils.eelf.logger.logback.utils.LogUtils;
+
+/**
+ * Metric Log Layout generates log messages as per EELF Metric Log Specifications
+ *
+ * @author Rajiv Singla
+ */
+public class MetricLogLayout extends LayoutBase<ILoggingEvent> {
+
+    @Override
+    public String doLayout(final ILoggingEvent event) {
+
+        final AppLogSpec appLogSpec = LogUtils.getAppLogSpec();
+        final LogLevelCategory logLevelCategory = LogUtils.getLogLevelCategory();
+        final Class<?> loggerClass = LogUtils.getLoggerClass();
+        final OptionalLogSpec optionalLogSpec = LogUtils.getOptionalLogSpec(loggerClass, logLevelCategory);
+        final MetricLogSpec metricLogSpec = LogUtils.getMetricLogSpec();
+
+        final String beginTimestamp = LogUtils.formatDate(metricLogSpec.getBeginTimestamp());
+        final String endTimestamp = LogUtils.formatDate(metricLogSpec.getEndTimestamp());
+
+        final String[] metricLogValues = {
+                beginTimestamp,
+                endTimestamp,
+                metricLogSpec.getRequestId(),
+                appLogSpec.getServiceInstanceID(),
+                event.getThreadName(),
+                appLogSpec.getVirtualServerName(),
+                metricLogSpec.getServiceName(),
+                metricLogSpec.getPartnerName(),
+                metricLogSpec.getTargetEntity(),
+                metricLogSpec.getTargetServiceName(),
+                optionalLogSpec.getStatusCode().name(),
+                metricLogSpec.getResponseCode().toString(),
+                metricLogSpec.getResponseDescription(),
+                appLogSpec.getInstanceUUID(),
+                logLevelCategory != null ? logLevelCategory.name() : "",
+                optionalLogSpec.getAlertSeverity().getSeverityCode(),
+                appLogSpec.getServerIPAddress(),
+                metricLogSpec.getElapsedTime().toString(),
+                appLogSpec.getServerFQDN(),
+                metricLogSpec.getClientIPAddress(),
+                optionalLogSpec.getClassName(),
+                optionalLogSpec.getUnused(),
+                optionalLogSpec.getProcessId(),
+                metricLogSpec.getTargetVirtualEntity(),
+                optionalLogSpec.getCustomField1(),
+                optionalLogSpec.getCustomField2(),
+                optionalLogSpec.getCustomField3(),
+                optionalLogSpec.getCustomField4(),
+                event.getFormattedMessage()
+        };
+
+        return LogUtils.createLogMessageString(metricLogValues);
+    }
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/listener/LogbackStartupListener.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/listener/LogbackStartupListener.java
new file mode 100644
index 0000000..b02c471
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/listener/LogbackStartupListener.java
@@ -0,0 +1,128 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.listener;
+
+import ch.qos.logback.classic.Level;
+import ch.qos.logback.classic.Logger;
+import ch.qos.logback.classic.LoggerContext;
+import ch.qos.logback.classic.spi.LoggerContextListener;
+import ch.qos.logback.core.Context;
+import ch.qos.logback.core.spi.ContextAwareBase;
+import ch.qos.logback.core.spi.LifeCycle;
+import ch.qos.logback.core.status.InfoStatus;
+import ch.qos.logback.core.status.WarnStatus;
+import org.onap.dcae.utils.eelf.logger.api.info.AppLogInfo;
+import org.onap.dcae.utils.eelf.logger.model.spec.AppLogSpecImpl;
+
+
+import java.io.File;
+
+import static org.onap.dcae.utils.eelf.logger.logback.EELFLoggerDefaults.DEFAULT_APP_LOG_INFO;
+import static org.onap.dcae.utils.eelf.logger.logback.utils.LogUtils.APP_LOG_SPEC_KEY;
+import static org.onap.dcae.utils.eelf.logger.logback.utils.LogUtils.CUSTOM_MDC_MAP;
+
+
+/**
+ * Logback Startup Listener is used to inject {@link AppLogInfo}
+ *
+ * @author Rajiv Singla
+ */
+public class LogbackStartupListener extends ContextAwareBase implements LoggerContextListener, LifeCycle {
+
+    private static final String APP_LOG_INFO_KEY_IN_CONTEXT = "APP_LOG_INFO";
+    private static final String CONTEXT_COMPONENT_NAME_PROPERTY_KEY = "componentName";
+    private static final String CONTEXT_MODIFY_WINDOWS_LOG_PATH_PROPERTY_KEY = "modifyLogPathInWindows";
+    private static final String CONTEXT_LOG_DIRECTORY_PROPERTY_KEY = "logDirectory";
+    private static final String CONTEXT_DEBUG_LOG_DIRECTORY_PROPERTY_KEY = "debugLogDirectory";
+    private static final String CONTEXT_APPEND_DIRECTORY_PROPERTY_KEY = "appendDirectory";
+
+    private boolean started = false;
+
+    @Override
+    public boolean isResetResistant() {
+        return true;
+    }
+
+    @Override
+    public void onStart(final LoggerContext context) {
+
+    }
+
+    @Override
+    public void onReset(final LoggerContext context) {
+
+    }
+
+    @Override
+    public void onStop(final LoggerContext context) {
+
+    }
+
+    @Override
+    public void onLevelChange(final Logger logger, final Level level) {
+
+    }
+
+    @Override
+    public void start() {
+        if (started) {
+            return;
+        }
+
+        Context context = getContext();
+
+        CUSTOM_MDC_MAP.put(APP_LOG_SPEC_KEY, new AppLogSpecImpl(DEFAULT_APP_LOG_INFO));
+        context.putObject(APP_LOG_INFO_KEY_IN_CONTEXT, DEFAULT_APP_LOG_INFO);
+        context.getStatusManager().add(new InfoStatus("Initialized APP LOG INFO", DEFAULT_APP_LOG_INFO));
+
+        // if Component name is not set derive from jar file name
+        if (context.getProperty(CONTEXT_COMPONENT_NAME_PROPERTY_KEY) == null) {
+            final String appName =
+                    new File(getClass().getProtectionDomain().getCodeSource().getLocation().getPath()).getName();
+            context.putProperty(CONTEXT_COMPONENT_NAME_PROPERTY_KEY, appName);
+            context.getStatusManager().add(new WarnStatus(
+                    "No componentName Property found. Deriving it from jar name", appName));
+        }
+
+        // if modify windows log path is enabled - then append target before log directories
+        if (context.getProperty(CONTEXT_MODIFY_WINDOWS_LOG_PATH_PROPERTY_KEY).equalsIgnoreCase("true")) {
+            final String os = System.getProperty("os.name");
+            if (os != null && os.startsWith("Windows")) {
+                final String logDirectory = context.getProperty(CONTEXT_LOG_DIRECTORY_PROPERTY_KEY);
+                final String debugLogDirectory = context.getProperty(CONTEXT_DEBUG_LOG_DIRECTORY_PROPERTY_KEY);
+                final String appendDir = context.getProperty(CONTEXT_APPEND_DIRECTORY_PROPERTY_KEY);
+                context.putProperty(CONTEXT_LOG_DIRECTORY_PROPERTY_KEY, appendDir + "/" + logDirectory);
+                context.putProperty(CONTEXT_DEBUG_LOG_DIRECTORY_PROPERTY_KEY, appendDir + "/" + debugLogDirectory);
+            }
+        }
+
+        started = true;
+    }
+
+    @Override
+    public void stop() {
+
+    }
+
+    @Override
+    public boolean isStarted() {
+        return started;
+    }
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/log/AuditLogImpl.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/log/AuditLogImpl.java
new file mode 100644
index 0000000..947b4c2
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/log/AuditLogImpl.java
@@ -0,0 +1,119 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.log;
+
+
+import org.onap.dcae.utils.eelf.logger.api.info.LogLevelCategory;
+import org.onap.dcae.utils.eelf.logger.api.log.AuditLog;
+import org.onap.dcae.utils.eelf.logger.api.spec.AuditLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+import org.onap.dcae.utils.eelf.logger.logback.utils.LogUtils;
+import org.slf4j.Logger;
+
+
+/**
+ * Audit Log Logback Implementation
+ *
+ * @author Rajiv Singla
+ */
+public class AuditLogImpl implements AuditLog {
+
+    private final Logger logger;
+    private final Class<?> clazz;
+
+    public AuditLogImpl(final Logger logger, final Class<?> clazz) {
+        this.logger = logger;
+        this.clazz = clazz;
+    }
+
+    @Override
+    public void log(final LogLevelCategory logLevelCategory, final String message, final AuditLogSpec
+            auditLogSpec, final OptionalLogSpec optionalLogSpec, final String... args) {
+        // if audit log spec or log level category is null throw an exception
+        if (auditLogSpec == null || logLevelCategory == null) {
+            throw new IllegalArgumentException("Audit Log Spec and Log level category must not be null");
+        }
+        // required fields
+        LogUtils.CUSTOM_MDC_MAP.put(LogUtils.LOG_LEVEL_CATEGORY_KEY, logLevelCategory);
+        LogUtils.CUSTOM_MDC_MAP.put(LogUtils.AUDIT_LOG_SPEC_KEY, auditLogSpec);
+        LogUtils.CUSTOM_MDC_MAP.put(LogUtils.LOGGER_CLASS_KEY, clazz);
+        // optional fields
+        LogUtils.CUSTOM_MDC_MAP.put(LogUtils.OPTIONAL_LOG_SPEC_KEY, optionalLogSpec);
+
+        // log with normalized log level category
+        LogUtils.logWithLogLevel(logLevelCategory, logger, LogUtils.AUDIT_LOG_MARKER, message, args);
+
+        // clean up
+        LogUtils.CUSTOM_MDC_MAP.remove(LogUtils.LOG_LEVEL_CATEGORY_KEY);
+        LogUtils.CUSTOM_MDC_MAP.remove(LogUtils.AUDIT_LOG_SPEC_KEY);
+        LogUtils.CUSTOM_MDC_MAP.remove(LogUtils.LOGGER_CLASS_KEY);
+        LogUtils.CUSTOM_MDC_MAP.remove(LogUtils.OPTIONAL_LOG_SPEC_KEY);
+    }
+
+    @Override
+    public void log(final LogLevelCategory logLevelCategory, final String message, final AuditLogSpec auditLogSpec,
+                    final String... args) {
+        log(logLevelCategory, message, auditLogSpec, null, args);
+    }
+
+    @Override
+    public void info(final String message, final AuditLogSpec auditLogSpec, final OptionalLogSpec optionalLogSpec,
+                     final String... args) {
+        log(LogLevelCategory.INFO, message, auditLogSpec, optionalLogSpec, args);
+    }
+
+    @Override
+    public void info(final String message, final AuditLogSpec auditLogSpec, final String... args) {
+        info(message, auditLogSpec, null, args);
+    }
+
+    @Override
+    public void warn(final String message, final AuditLogSpec auditLogSpec, final OptionalLogSpec optionalLogSpec,
+                     final String... args) {
+        log(LogLevelCategory.WARN, message, auditLogSpec, optionalLogSpec, args);
+    }
+
+    @Override
+    public void warn(final String message, final AuditLogSpec auditLogSpec, final String... args) {
+        warn(message, auditLogSpec, null, args);
+    }
+
+    @Override
+    public void error(final String message, final AuditLogSpec auditLogSpec, final OptionalLogSpec optionalLogSpec,
+                      final String... args) {
+        log(LogLevelCategory.ERROR, message, auditLogSpec, optionalLogSpec, args);
+    }
+
+    @Override
+    public void error(final String message, final AuditLogSpec auditLogSpec, final String... args) {
+        error(message, auditLogSpec, null, args);
+    }
+
+    @Override
+    public void fatal(final String message, final AuditLogSpec auditLogSpec, final OptionalLogSpec optionalLogSpec,
+                      final String... args) {
+        log(LogLevelCategory.FATAL, message, auditLogSpec, optionalLogSpec, args);
+    }
+
+    @Override
+    public void fatal(final String message, final AuditLogSpec auditLogSpec, final String... args) {
+        fatal(message, auditLogSpec, null, args);
+    }
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/log/DebugLogImpl.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/log/DebugLogImpl.java
new file mode 100644
index 0000000..1e17f3b
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/log/DebugLogImpl.java
@@ -0,0 +1,88 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.log;
+
+
+import org.onap.dcae.utils.eelf.logger.api.info.LogLevelCategory;
+import org.onap.dcae.utils.eelf.logger.api.log.DebugLog;
+import org.onap.dcae.utils.eelf.logger.api.spec.DebugLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+import org.onap.dcae.utils.eelf.logger.logback.utils.LogUtils;
+import org.slf4j.Logger;
+
+
+/**
+ * Debug Log Logback Implementation
+ *
+ * @author Rajiv Singla
+ */
+public class DebugLogImpl implements DebugLog {
+
+    private final Logger logger;
+    private final Class<?> clazz;
+
+    public DebugLogImpl(final Logger logger, final Class<?> clazz) {
+        this.logger = logger;
+        this.clazz = clazz;
+    }
+
+    @Override
+    public void log(final LogLevelCategory logLevelCategory, final String message, final DebugLogSpec debugLogSpec,
+                    final OptionalLogSpec optionalLogSpec, final String... args) {
+
+        // if log level category is null throw an exception
+        if (logLevelCategory == null) {
+            throw new IllegalArgumentException("Log level category must not be null");
+        }
+
+        LogUtils.CUSTOM_MDC_MAP.put(LogUtils.LOG_LEVEL_CATEGORY_KEY, logLevelCategory);
+        LogUtils.CUSTOM_MDC_MAP.put(LogUtils.DEBUG_LOG_SPEC_KEY, debugLogSpec);
+        LogUtils.CUSTOM_MDC_MAP.put(LogUtils.LOGGER_CLASS_KEY, clazz);
+        // optional fields
+        LogUtils.CUSTOM_MDC_MAP.put(LogUtils.OPTIONAL_LOG_SPEC_KEY, optionalLogSpec);
+
+        // log with normalized log level category
+        LogUtils.logWithLogLevel(logLevelCategory, logger, LogUtils.DEBUG_LOG_MARKER, message, args);
+
+        // clean up
+        LogUtils.CUSTOM_MDC_MAP.remove(LogUtils.LOG_LEVEL_CATEGORY_KEY);
+        LogUtils.CUSTOM_MDC_MAP.remove(LogUtils.DEBUG_LOG_SPEC_KEY);
+        LogUtils.CUSTOM_MDC_MAP.remove(LogUtils.LOGGER_CLASS_KEY);
+        LogUtils.CUSTOM_MDC_MAP.remove(LogUtils.OPTIONAL_LOG_SPEC_KEY);
+
+    }
+
+    @Override
+    public void log(final LogLevelCategory logLevelCategory, final String message, final DebugLogSpec debugLogSpec,
+                    final String... args) {
+        log(logLevelCategory, message, debugLogSpec, null, args);
+    }
+
+    @Override
+    public void debug(final String message, final DebugLogSpec debugLogSpec, final OptionalLogSpec optionalLogSpec,
+                      final String... args) {
+        log(LogLevelCategory.DEBUG, message, debugLogSpec, optionalLogSpec, args);
+    }
+
+    @Override
+    public void debug(final String message, final DebugLogSpec debugLogSpec, final String... args) {
+        debug(message, debugLogSpec, null, args);
+    }
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/log/EELFLoggerContextImpl.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/log/EELFLoggerContextImpl.java
new file mode 100644
index 0000000..e5be1d8
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/log/EELFLoggerContextImpl.java
@@ -0,0 +1,57 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.log;
+
+import org.onap.dcae.utils.eelf.logger.api.log.EELFLoggerContext;
+import org.onap.dcae.utils.eelf.logger.api.spec.AppLogSpec;
+import org.onap.dcae.utils.eelf.logger.model.spec.AppLogSpecImpl;
+
+import static org.onap.dcae.utils.eelf.logger.logback.EELFLoggerDefaults.DEFAULT_APP_LOG_INFO;
+import static org.onap.dcae.utils.eelf.logger.logback.utils.LogUtils.APP_LOG_SPEC_KEY;
+import static org.onap.dcae.utils.eelf.logger.logback.utils.LogUtils.CUSTOM_MDC_MAP;
+
+
+/**
+ * Default EELF Logger Context which contains EELF Specs which are usually constant for entire life cycle of the
+ * application
+ *
+ * @author Rajiv Singla
+ */
+public class EELFLoggerContextImpl implements EELFLoggerContext {
+
+    @Override
+    public AppLogSpec getAppLogSpec() {
+        return CUSTOM_MDC_MAP.get(APP_LOG_SPEC_KEY) == null ? null : (AppLogSpec) CUSTOM_MDC_MAP.get(APP_LOG_SPEC_KEY);
+    }
+
+    @Override
+    public void setAppLogSpec(final AppLogSpec appLogSpec) {
+        if (appLogSpec == null) {
+            CUSTOM_MDC_MAP.put(APP_LOG_SPEC_KEY, new AppLogSpecImpl(DEFAULT_APP_LOG_INFO));
+        } else {
+            CUSTOM_MDC_MAP.put(APP_LOG_SPEC_KEY, appLogSpec);
+        }
+    }
+
+    @Override
+    public boolean isInitialized() {
+        return CUSTOM_MDC_MAP.get(APP_LOG_SPEC_KEY) == null;
+    }
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/log/EELFLoggerImpl.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/log/EELFLoggerImpl.java
new file mode 100644
index 0000000..3f1e716
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/log/EELFLoggerImpl.java
@@ -0,0 +1,81 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.log;
+
+
+import org.onap.dcae.utils.eelf.logger.api.log.AuditLog;
+import org.onap.dcae.utils.eelf.logger.api.log.DebugLog;
+import org.onap.dcae.utils.eelf.logger.api.log.EELFLogger;
+import org.onap.dcae.utils.eelf.logger.api.log.EELFLoggerContext;
+import org.onap.dcae.utils.eelf.logger.api.log.ErrorLog;
+import org.onap.dcae.utils.eelf.logger.api.log.MetricLog;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * EELF Logger Logback Implementation
+ *
+ * @author Rajiv Singla
+ */
+public class EELFLoggerImpl implements EELFLogger {
+
+    private Logger logger;
+    private Class<?> clazz;
+
+    public EELFLoggerImpl() {
+        // no arg constructor required for Service Loader discovery
+    }
+
+    public EELFLoggerImpl(final Class<?> clazz) {
+        logger = LoggerFactory.getLogger(clazz);
+        this.clazz = clazz;
+    }
+
+
+    @Override
+    public AuditLog auditLog() {
+        return new AuditLogImpl(logger, clazz);
+    }
+
+    @Override
+    public MetricLog metricLog() {
+        return new MetricLogImpl(logger, clazz);
+    }
+
+    @Override
+    public ErrorLog errorLog() {
+        return new ErrorLogImpl(logger, clazz);
+    }
+
+    @Override
+    public DebugLog debugLog() {
+        return new DebugLogImpl(logger, clazz);
+    }
+
+    @Override
+    public EELFLoggerContext loggingContext() {
+        return new EELFLoggerContextImpl();
+    }
+
+    @Override
+    public String toString() {
+        return "EELF LOGBACK IMP";
+    }
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/log/ErrorLogImpl.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/log/ErrorLogImpl.java
new file mode 100644
index 0000000..5d8f272
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/log/ErrorLogImpl.java
@@ -0,0 +1,98 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.log;
+
+import org.onap.dcae.utils.eelf.logger.api.info.LogLevelCategory;
+import org.onap.dcae.utils.eelf.logger.api.log.ErrorLog;
+import org.onap.dcae.utils.eelf.logger.api.spec.ErrorLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+import org.onap.dcae.utils.eelf.logger.logback.utils.LogUtils;
+import org.slf4j.Logger;
+
+
+/**
+ * Error Log Logback Implementation
+ *
+ * @author Rajiv Singla
+ */
+public class ErrorLogImpl implements ErrorLog {
+
+    private final Logger logger;
+    private final Class<?> clazz;
+
+    public ErrorLogImpl(final Logger logger, final Class<?> clazz) {
+        this.logger = logger;
+        this.clazz = clazz;
+    }
+
+    @Override
+    public void log(final LogLevelCategory logLevelCategory, final String message, final ErrorLogSpec errorLogSpec,
+                    final OptionalLogSpec optionalLogSpec, final String... args) {
+
+        // if error log spec or log level category is null throw an exception
+        if (errorLogSpec == null || logLevelCategory == null) {
+            throw new IllegalArgumentException("Error Log Spec and Log level category must not be null");
+        }
+
+        // required fields
+        LogUtils.CUSTOM_MDC_MAP.put(LogUtils.LOG_LEVEL_CATEGORY_KEY, logLevelCategory);
+        LogUtils.CUSTOM_MDC_MAP.put(LogUtils.ERROR_LOG_SPEC_KEY, errorLogSpec);
+        LogUtils.CUSTOM_MDC_MAP.put(LogUtils.LOGGER_CLASS_KEY, clazz);
+        // optional fields
+        LogUtils.CUSTOM_MDC_MAP.put(LogUtils.OPTIONAL_LOG_SPEC_KEY, optionalLogSpec);
+
+        // log with normalized log level category
+        LogUtils.logWithLogLevel(logLevelCategory, logger, LogUtils.ERROR_LOG_MARKER, message, args);
+
+        // clean up
+        LogUtils.CUSTOM_MDC_MAP.remove(LogUtils.LOG_LEVEL_CATEGORY_KEY);
+        LogUtils.CUSTOM_MDC_MAP.remove(LogUtils.ERROR_LOG_SPEC_KEY);
+        LogUtils.CUSTOM_MDC_MAP.remove(LogUtils.LOGGER_CLASS_KEY);
+        LogUtils.CUSTOM_MDC_MAP.remove(LogUtils.OPTIONAL_LOG_SPEC_KEY);
+    }
+
+    @Override
+    public void log(final LogLevelCategory logLevelCategory, final String message, final ErrorLogSpec errorLogSpec,
+                    final String... args) {
+        log(logLevelCategory, message, errorLogSpec, null, args);
+    }
+
+    @Override
+    public void error(final String message, final ErrorLogSpec errorLogSpec, final OptionalLogSpec optionalLogSpec,
+                      final String... args) {
+        log(LogLevelCategory.ERROR, message, errorLogSpec, null, args);
+    }
+
+    @Override
+    public void error(final String message, final ErrorLogSpec errorLogSpec, final String... args) {
+        error(message, errorLogSpec, null, args);
+    }
+
+    @Override
+    public void warn(final String message, final ErrorLogSpec errorLogSpec, final OptionalLogSpec optionalLogSpec,
+                     final String... args) {
+        log(LogLevelCategory.WARN, message, errorLogSpec, null, args);
+    }
+
+    @Override
+    public void warn(final String message, final ErrorLogSpec errorLogSpec, final String... args) {
+        warn(message, errorLogSpec, null, args);
+    }
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/log/MetricLogImpl.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/log/MetricLogImpl.java
new file mode 100644
index 0000000..5857835
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/log/MetricLogImpl.java
@@ -0,0 +1,120 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.log;
+
+import org.onap.dcae.utils.eelf.logger.api.info.LogLevelCategory;
+import org.onap.dcae.utils.eelf.logger.api.log.MetricLog;
+import org.onap.dcae.utils.eelf.logger.api.spec.MetricLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+import org.onap.dcae.utils.eelf.logger.logback.utils.LogUtils;
+import org.slf4j.Logger;
+
+/**
+ * Metric Log Logback Implementation
+ *
+ * @author Rajiv Singla
+ */
+public class MetricLogImpl implements MetricLog {
+
+    private final Logger logger;
+    private final Class<?> clazz;
+
+    public MetricLogImpl(final Logger logger, final Class<?> clazz) {
+        this.logger = logger;
+        this.clazz = clazz;
+    }
+
+
+    @Override
+    public void log(final LogLevelCategory logLevelCategory, final String message, final MetricLogSpec metricLogSpec,
+                    final OptionalLogSpec optionalLogSpec, final String... args) {
+
+        // if metric log spec or log level category is null throw an exception
+        if (metricLogSpec == null || logLevelCategory == null) {
+            throw new IllegalArgumentException("Metric Log Spec and Log level category must not be null");
+        }
+
+        // required fields
+        LogUtils.CUSTOM_MDC_MAP.put(LogUtils.LOG_LEVEL_CATEGORY_KEY, logLevelCategory);
+        LogUtils.CUSTOM_MDC_MAP.put(LogUtils.METRIC_LOG_SPEC_KEY, metricLogSpec);
+        LogUtils.CUSTOM_MDC_MAP.put(LogUtils.LOGGER_CLASS_KEY, clazz);
+        // optional fields
+        LogUtils.CUSTOM_MDC_MAP.put(LogUtils.OPTIONAL_LOG_SPEC_KEY, optionalLogSpec);
+
+        // log with normalized log level category
+        LogUtils.logWithLogLevel(logLevelCategory, logger, LogUtils.METRIC_LOG_MARKER, message, args);
+
+        // clean up
+        LogUtils.CUSTOM_MDC_MAP.remove(LogUtils.LOG_LEVEL_CATEGORY_KEY);
+        LogUtils.CUSTOM_MDC_MAP.remove(LogUtils.METRIC_LOG_SPEC_KEY);
+        LogUtils.CUSTOM_MDC_MAP.remove(LogUtils.LOGGER_CLASS_KEY);
+        LogUtils.CUSTOM_MDC_MAP.remove(LogUtils.OPTIONAL_LOG_SPEC_KEY);
+    }
+
+    @Override
+    public void log(final LogLevelCategory logLevelCategory, final String message, final MetricLogSpec metricLogSpec,
+                    final String... args) {
+        log(logLevelCategory, message, metricLogSpec, null, args);
+    }
+
+    @Override
+    public void info(final String message, final MetricLogSpec metricLogSpec, final OptionalLogSpec optionalLogSpec,
+                     final String... args) {
+        log(LogLevelCategory.INFO, message, metricLogSpec, optionalLogSpec, args);
+    }
+
+    @Override
+    public void info(final String message, final MetricLogSpec metricLogSpec, final String... args) {
+        log(LogLevelCategory.INFO, message, metricLogSpec, args);
+    }
+
+    @Override
+    public void warn(final String message, final MetricLogSpec metricLogSpec, final OptionalLogSpec optionalLogSpec,
+                     final String... args) {
+        log(LogLevelCategory.WARN, message, metricLogSpec, optionalLogSpec, args);
+    }
+
+    @Override
+    public void warn(final String message, final MetricLogSpec metricLogSpec, final String... args) {
+        warn(message, metricLogSpec, null, args);
+    }
+
+    @Override
+    public void error(final String message, final MetricLogSpec metricLogSpec, final OptionalLogSpec optionalLogSpec,
+                      final String... args) {
+        log(LogLevelCategory.ERROR, message, metricLogSpec, optionalLogSpec, args);
+    }
+
+    @Override
+    public void error(final String message, final MetricLogSpec metricLogSpec, final String... args) {
+        error(message, metricLogSpec, null, args);
+    }
+
+    @Override
+    public void fatal(final String message, final MetricLogSpec metricLogSpec, final OptionalLogSpec optionalLogSpec,
+                      final String... args) {
+        log(LogLevelCategory.FATAL, message, metricLogSpec, optionalLogSpec, args);
+    }
+
+    @Override
+    public void fatal(final String message, final MetricLogSpec metricLogSpec, final String... args) {
+        fatal(message, metricLogSpec, null, args);
+    }
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/resolver/CompositePropertyResolver.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/resolver/CompositePropertyResolver.java
new file mode 100644
index 0000000..e5f1bc1
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/resolver/CompositePropertyResolver.java
@@ -0,0 +1,53 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.resolver;
+
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * A composite property resolver can look under different resolvers in order of given property resolvers
+ *
+ * @author Rajiv Singla
+ */
+public class CompositePropertyResolver implements PropertyResolver {
+
+    private static final long serialVersionUID = 1L;
+
+    private final List<PropertyResolver> propertyResolvers;
+
+    public CompositePropertyResolver(PropertyResolver... propertyResolvers) {
+        this.propertyResolvers = Arrays.asList(propertyResolvers);
+    }
+
+    @Override
+    public String resolve(final List<String> propertyNames) {
+        // resolver property in given resolvers in the same order they are defined
+        for (PropertyResolver propertyResolver : propertyResolvers) {
+            final String propertyValue = propertyResolver.resolve(propertyNames);
+            if (propertyValue != null) {
+                return propertyValue;
+            }
+        }
+
+        return null;
+    }
+
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/resolver/EnvironmentPropertyResolver.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/resolver/EnvironmentPropertyResolver.java
new file mode 100644
index 0000000..8f3d59f
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/resolver/EnvironmentPropertyResolver.java
@@ -0,0 +1,46 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.resolver;
+
+import java.util.List;
+
+/**
+ * Looks up Property values inside HOST environment variables
+ *
+ * @author Rajiv Singla
+ */
+public class EnvironmentPropertyResolver implements PropertyResolver {
+
+    private static final long serialVersionUID = 1L;
+
+    @Override
+    public String resolve(final List<String> propertyNames) {
+
+        // check if system environment variables have property names set
+        for (final String propertyName : propertyNames) {
+            final String propertyValue = System.getenv(propertyName);
+            if (propertyValue != null) {
+                return propertyValue;
+            }
+        }
+
+        return null;
+    }
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/resolver/PropertyResolver.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/resolver/PropertyResolver.java
new file mode 100644
index 0000000..758de61
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/resolver/PropertyResolver.java
@@ -0,0 +1,41 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.resolver;
+
+import java.io.Serializable;
+import java.util.List;
+
+/**
+ * A resolver is used to resolve properties
+ *
+ * @author Rajiv Singla
+ */
+public interface PropertyResolver extends Serializable {
+
+    /**
+     * Returns resolved property value
+     *
+     * @param propertyNames names under which property can be found
+     *
+     * @return property value
+     */
+    String resolve(List<String> propertyNames);
+
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/resolver/SystemPropertyResolver.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/resolver/SystemPropertyResolver.java
new file mode 100644
index 0000000..674b00b
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/resolver/SystemPropertyResolver.java
@@ -0,0 +1,59 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.resolver;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Properties;
+
+/**
+ * Resolve System Properties passed in by -DpropertyName=propertyValue when invoking
+ * via java command line arguments
+ *
+ * @author Rajiv Singla
+ */
+public class SystemPropertyResolver implements PropertyResolver {
+
+    private static final long serialVersionUID = 1L;
+
+    @Override
+    public String resolve(final List<String> propertyNames) {
+
+        // Get all system Properties
+        final Properties systemProperties = System.getProperties();
+
+        for (Map.Entry<Object, Object> systemEntries : systemProperties.entrySet()) {
+
+            if (systemEntries.getKey() instanceof String) {
+                final String systemKey = (String) systemEntries.getKey();
+
+                // if system properties contain any of the property names - ignoring case then return its value
+                for (String propertyName : propertyNames) {
+                    if (propertyName.equalsIgnoreCase(systemKey)) {
+                        return (String) systemEntries.getValue();
+                    }
+                }
+
+            }
+        }
+
+        return null;
+    }
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/utils/LogUtils.java b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/utils/LogUtils.java
new file mode 100644
index 0000000..f5c558b
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/java/org/onap/dcae/utils/eelf/logger/logback/utils/LogUtils.java
@@ -0,0 +1,590 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.utils;
+
+import ch.qos.logback.core.CoreConstants;
+import org.onap.dcae.utils.eelf.logger.api.info.AppLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.LogLevelCategory;
+import org.onap.dcae.utils.eelf.logger.api.info.NagiosAlertLevel;
+import org.onap.dcae.utils.eelf.logger.api.info.RequestIdLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.RequestStatusCode;
+import org.onap.dcae.utils.eelf.logger.api.spec.AppLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.AuditLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.DebugLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.ErrorLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.MetricLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+import org.onap.dcae.utils.eelf.logger.logback.EELFLoggerDefaults;
+import org.onap.dcae.utils.eelf.logger.logback.resolver.CompositePropertyResolver;
+import org.onap.dcae.utils.eelf.logger.logback.resolver.EnvironmentPropertyResolver;
+import org.onap.dcae.utils.eelf.logger.logback.resolver.SystemPropertyResolver;
+import org.onap.dcae.utils.eelf.logger.model.info.AppLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.CodeLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.MessageLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.RequestIdLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.RequestTimingLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.spec.AppLogSpecImpl;
+import org.onap.dcae.utils.eelf.logger.model.spec.AuditLogSpecImpl;
+import org.onap.dcae.utils.eelf.logger.model.spec.DebugLogSpecImpl;
+import org.onap.dcae.utils.eelf.logger.model.spec.ErrorLogSpecImpl;
+import org.onap.dcae.utils.eelf.logger.model.spec.MetricLogSpecImpl;
+import org.onap.dcae.utils.eelf.logger.model.spec.OptionalLogSpecImpl;
+import org.slf4j.Logger;
+import org.slf4j.Marker;
+import org.slf4j.MarkerFactory;
+
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.text.SimpleDateFormat;
+import java.util.Arrays;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.TimeZone;
+import java.util.UUID;
+
+
+
+/**
+ * Contains various logging utility methods
+ *
+ * @author Rajiv Singla
+ */
+public abstract class LogUtils {
+
+    private static final String LOG_MESSAGE_DELIMITER = "|";
+    private static final String DATE_FORMAT = "yyyy-MM-dd'T'HH:mm:ss.SSSZ";
+    private static final String DATE_TIMEZONE = "UTC";
+    // property resolver which looks up system property and the environment properties
+    private static final CompositePropertyResolver COMPOSITE_PROPERTY_RESOLVER =
+            new CompositePropertyResolver(new SystemPropertyResolver(), new EnvironmentPropertyResolver());
+
+    // Custom MDC Map Keys
+    public static final String APP_LOG_SPEC_KEY = "APP_LOG_SPEC";
+    public static final String AUDIT_LOG_SPEC_KEY = "AUDIT_LOG_SPEC";
+    public static final String METRIC_LOG_SPEC_KEY = "METRIC_LOG_SPEC";
+    public static final String ERROR_LOG_SPEC_KEY = "ERROR_LOG_SPEC";
+    public static final String DEBUG_LOG_SPEC_KEY = "DEBUG_LOG_SPEC";
+    public static final String OPTIONAL_LOG_SPEC_KEY = "OPTIONAL_LOG_SPEC";
+    public static final String LOG_LEVEL_CATEGORY_KEY = "LOG_LEVEL_CATEGORY";
+    public static final String LOGGER_CLASS_KEY = "LOGGER_CLASS_KEY";
+
+    // markers
+    public static final Marker AUDIT_LOG_MARKER = MarkerFactory.getMarker("AUDIT_LOG");
+    public static final Marker METRIC_LOG_MARKER = MarkerFactory.getMarker("METRIC_LOG");
+    public static final Marker ERROR_LOG_MARKER = MarkerFactory.getMarker("ERROR_LOG");
+    public static final Marker DEBUG_LOG_MARKER = MarkerFactory.getMarker("DEBUG_LOG");
+
+
+    public static final Map<String, Object> CUSTOM_MDC_MAP = new ThreadLocal<Map<String, Object>>() {
+        @Override
+        protected Map<String, Object> initialValue() {
+            return new HashMap<>();
+        }
+    }.get();
+
+    public static final ThreadLocal<SimpleDateFormat> SIMPLE_DATE_FORMAT = new ThreadLocal<SimpleDateFormat>() {
+        @Override
+        protected SimpleDateFormat initialValue() {
+            final SimpleDateFormat simpleDateFormat = new SimpleDateFormat(DATE_FORMAT);
+            simpleDateFormat.setTimeZone(TimeZone.getTimeZone(DATE_TIMEZONE));
+            return simpleDateFormat;
+        }
+    };
+
+
+    private LogUtils() {
+        // private constructor
+    }
+
+
+    /**
+     * Logs eomp message with normalized log level category
+     *
+     * @param logLevelCategory ecomp log level category
+     * @param logger logback logger
+     * @param marker logback marker
+     * @param message log message
+     * @param args log message arguments for interpolation
+     */
+    public static void logWithLogLevel(final LogLevelCategory logLevelCategory,
+                                       final Logger logger, final Marker marker,
+                                       final String message, final String... args) {
+        switch (logLevelCategory) {
+            case DEBUG:
+                logger.debug(marker, message, args);
+                break;
+            case INFO:
+                logger.info(marker, message, args);
+                break;
+            case WARN:
+                logger.warn(marker, message, args);
+                break;
+            default:
+                // fatal log level is treated as error also as logback does not have fatal level
+                logger.error(marker, message, args);
+        }
+    }
+
+
+    /**
+     * Returns value for {@link AppLogSpec}. If no {@link AppLogSpec} is defined a default app log spec is passed
+     *
+     * @return app log spec
+     */
+    public static AppLogSpec getAppLogSpec() {
+        final AppLogSpec appLogSpec = getCustomMapValue(APP_LOG_SPEC_KEY, AppLogSpec.class);
+        return appLogSpec == null ? new AppLogSpecImpl(EELFLoggerDefaults.DEFAULT_APP_LOG_INFO) : appLogSpec;
+    }
+
+    /**
+     * Populate default values of {@link OptionalLogSpec} if not present
+     *
+     * @param loggerClass logger class
+     * @param logLevelCategory log level category
+     *
+     * @return optional log spec with default values if not present
+     */
+    public static OptionalLogSpec getOptionalLogSpec(final Class<?> loggerClass, final LogLevelCategory
+            logLevelCategory) {
+
+        OptionalLogSpecImpl optionalLogSpec =
+                getCustomMapValue(OPTIONAL_LOG_SPEC_KEY, OptionalLogSpecImpl.class);
+
+        if (optionalLogSpec != null) {
+            // if message log info is empty populate default values
+            if (optionalLogSpec.getMessageLogInfo() == null ||
+                    optionalLogSpec.getCreationTimestamp() == null && optionalLogSpec.getAlertSeverity() == null &&
+                            optionalLogSpec.getStatusCode() == null) {
+                optionalLogSpec = optionalLogSpec.withMessageLogInfo(createDefaultMessageLogInfo(logLevelCategory));
+            }
+            // if code log info is empty populate default values
+            if (optionalLogSpec.getCodeLogInfo() == null ||
+                    optionalLogSpec.getClassName() == null && optionalLogSpec.getThreadId() == null) {
+                optionalLogSpec = optionalLogSpec.withCodeLogInfo(createDefaultCodeLogInfo(loggerClass));
+            }
+            // if custom fields log info is empty populate default values
+            if (optionalLogSpec.getCustomFieldsLogInfo() == null) {
+                optionalLogSpec =
+                        optionalLogSpec.withCustomFieldsLogInfo(EELFLoggerDefaults.DEFAULT_CUSTOM_FIELDS_LOG_INFO);
+            }
+            // if misc fields log info is empty populate default values
+            if (optionalLogSpec.getMiscLogInfo() == null) {
+                optionalLogSpec = optionalLogSpec.withMiscLogInfo(EELFLoggerDefaults.DEFAULT_MISC_LOG_INFO);
+            }
+        } else {
+            // optional log spec is null so create new optional log spec
+            optionalLogSpec = createDefaultOptionalLogSpec(loggerClass, logLevelCategory);
+        }
+
+        return optionalLogSpec;
+    }
+
+
+    /**
+     * Formats given date in ISO 8601 format
+     *
+     * @param date Date object
+     *
+     * @return formatted date string
+     */
+    public static String formatDate(final Date date) {
+        if (date == null) {
+            return "";
+        }
+        return SIMPLE_DATE_FORMAT.get().format(date);
+    }
+
+    /**
+     * Creates log message string
+     *
+     * @param logValues log message values
+     *
+     * @return log message string
+     */
+    public static String createLogMessageString(final String[] logValues) {
+        final StringBuffer stringBuffer = new StringBuffer(512);
+        for (int i = 0; i < logValues.length; i++) {
+            final String logValue = logValues[i];
+            stringBuffer.append(logValue != null ? logValue : "");
+            if (i != logValues.length - 1) {
+                stringBuffer.append(LOG_MESSAGE_DELIMITER);
+            }
+        }
+        stringBuffer.append(CoreConstants.LINE_SEPARATOR);
+        return stringBuffer.toString();
+    }
+
+    /**
+     * Gets custom MDC value from Custom MDC Map for give key. Returns null if no value can be found
+     *
+     * @param key MDC Map key
+     * @param clazz expected value class type
+     * @param <T> class type
+     *
+     * @return value inside Custom MDC Map
+     */
+    private static <T> T getCustomMapValue(final String key, final Class<T> clazz) {
+        final Object value = CUSTOM_MDC_MAP.get(key);
+        if (value != null) {
+            return clazz.cast(value);
+        }
+        return null;
+    }
+
+
+    /**
+     * Get current Metric log spec from the custom MDC map and populates default values if not present
+     *
+     * @return Metric log spec
+     */
+    public static MetricLogSpec getMetricLogSpec() {
+        MetricLogSpecImpl metricLogSpec = getCustomMapValue(METRIC_LOG_SPEC_KEY, MetricLogSpecImpl.class);
+
+        if (metricLogSpec != null) {
+            if (metricLogSpec.getRequestIdLogInfo() == null || metricLogSpec.getRequestId() == null) {
+                metricLogSpec = metricLogSpec.withRequestIdLogInfo(createNewRequestIdLogInfo());
+            }
+            if (metricLogSpec.getServiceLogInfo() == null) {
+                metricLogSpec = metricLogSpec.withServiceLogInfo(EELFLoggerDefaults.DEFAULT_SERVICE_LOG_INFO);
+            }
+            if (metricLogSpec.getRequestTimingLogInfo() == null || metricLogSpec.getBeginTimestamp() == null ||
+                    metricLogSpec.getEndTimestamp() == null) {
+                metricLogSpec =
+                        metricLogSpec.withRequestTimingLogInfo(EELFLoggerDefaults.DEFAULT_REQUEST_TIMING_LOG_INFO);
+            }
+            if (metricLogSpec.getResponseLogInfo() == null) {
+                metricLogSpec = metricLogSpec.withResponseLogInfo(EELFLoggerDefaults.DEFAULT_RESPONSE_LOG_INFO);
+            }
+            final Date beginTimestamp = metricLogSpec.getBeginTimestamp();
+            final Date endTimestamp = metricLogSpec.getEndTimestamp();
+            final Long elapsedTime = metricLogSpec.getElapsedTime();
+            if (endTimestamp != null && beginTimestamp != null && elapsedTime == null) {
+                final RequestTimingLogInfoImpl requestTimingLogInfo =
+                        new RequestTimingLogInfoImpl(beginTimestamp, endTimestamp,
+                                endTimestamp.getTime() - beginTimestamp.getTime());
+                metricLogSpec = metricLogSpec.withRequestTimingLogInfo(requestTimingLogInfo);
+            }
+            if (metricLogSpec.getTargetServiceLogInfo() == null) {
+                metricLogSpec =
+                        metricLogSpec.withTargetServiceLogInfo(EELFLoggerDefaults.DEFAULT_TARGET_SERVICE_LOG_INFO);
+            }
+        } else {
+            throw new IllegalArgumentException("Metric Log Spec must not be null");
+        }
+
+        return metricLogSpec;
+    }
+
+    /**
+     * Get current Debug log spec from the custom MDC map and populates default values if not present
+     *
+     * @return Debug log spec
+     */
+    public static DebugLogSpec getDebugLogSpec() {
+        final DebugLogSpecImpl debugLogSpec = getCustomMapValue(DEBUG_LOG_SPEC_KEY, DebugLogSpecImpl.class);
+        if (debugLogSpec == null || debugLogSpec.getRequestIdLogInfo() == null || debugLogSpec.getRequestId() == null) {
+            return new DebugLogSpecImpl(createNewRequestIdLogInfo());
+        }
+        return debugLogSpec;
+    }
+
+    /**
+     * Get current Error log spec from the custom MDC map and populates default values if not present
+     *
+     * @return Error log spec
+     */
+    public static ErrorLogSpec getErrorLogSpec() {
+        ErrorLogSpecImpl errorLogSpec = getCustomMapValue(ERROR_LOG_SPEC_KEY, ErrorLogSpecImpl.class);
+        if (errorLogSpec != null) {
+
+            if (errorLogSpec.getRequestIdLogInfo() == null || errorLogSpec.getRequestId() == null) {
+                errorLogSpec = errorLogSpec.withRequestIdLogInfo(createNewRequestIdLogInfo());
+            }
+            if (errorLogSpec.getServiceLogInfo() == null) {
+                errorLogSpec = errorLogSpec.withServiceLogInfo(EELFLoggerDefaults.DEFAULT_SERVICE_LOG_INFO);
+            }
+            if (errorLogSpec.getTargetServiceLogInfo() == null) {
+                errorLogSpec =
+                        errorLogSpec.withTargetServiceLogInfo(EELFLoggerDefaults.DEFAULT_TARGET_SERVICE_LOG_INFO);
+            }
+            if (errorLogSpec.getErrorLogInfo() == null) {
+                errorLogSpec = errorLogSpec.withErrorLogInfo(EELFLoggerDefaults.DEFAULT_ERROR_LOG_INFO);
+            }
+
+        } else {
+            throw new IllegalArgumentException("Error Log Spec cannot be null");
+        }
+        return errorLogSpec;
+    }
+
+
+    /**
+     * Get current Audit log spec from the custom MDC map and populates default values if not present
+     *
+     * @return Audit log spec
+     */
+    public static AuditLogSpec getAuditLogSpec() {
+        AuditLogSpecImpl auditLogSpec = getCustomMapValue(AUDIT_LOG_SPEC_KEY, AuditLogSpecImpl.class);
+        if (auditLogSpec != null) {
+            if (auditLogSpec.getServiceLogInfo() == null) {
+                auditLogSpec = auditLogSpec.withServiceLogInfo(EELFLoggerDefaults.DEFAULT_SERVICE_LOG_INFO);
+            }
+            if (auditLogSpec.getRequestIdLogInfo() == null || auditLogSpec.getRequestId() == null) {
+                auditLogSpec = auditLogSpec.withRequestIdLogInfo(createNewRequestIdLogInfo());
+            }
+            if (auditLogSpec.getResponseLogInfo() == null) {
+                auditLogSpec = auditLogSpec.withResponseLogInfo(EELFLoggerDefaults.DEFAULT_RESPONSE_LOG_INFO);
+            }
+
+            if (auditLogSpec.getRequestTimingLogInfo() == null || auditLogSpec.getBeginTimestamp() == null ||
+                    auditLogSpec.getEndTimestamp() == null) {
+                auditLogSpec =
+                        auditLogSpec.withRequestTimingLogInfo(EELFLoggerDefaults.DEFAULT_REQUEST_TIMING_LOG_INFO);
+            }
+            final Date beginTimestamp = auditLogSpec.getBeginTimestamp();
+            final Date endTimestamp = auditLogSpec.getEndTimestamp();
+            final Long elapsedTime = auditLogSpec.getElapsedTime();
+            if (endTimestamp != null && beginTimestamp != null && elapsedTime == null) {
+                final RequestTimingLogInfoImpl requestTimingLogInfo =
+                        new RequestTimingLogInfoImpl(beginTimestamp, endTimestamp,
+                                endTimestamp.getTime() - beginTimestamp.getTime());
+                auditLogSpec = auditLogSpec.withRequestTimingLogInfo(requestTimingLogInfo);
+            }
+
+        } else {
+            throw new IllegalArgumentException("Audit Log Spec cannot be null");
+        }
+
+        return auditLogSpec;
+    }
+
+
+    private static RequestIdLogInfo createNewRequestIdLogInfo() {
+        return new RequestIdLogInfoImpl(UUID.randomUUID().toString());
+    }
+
+    /**
+     * Return Log Level Category from MDC Map
+     *
+     * @return log level category
+     */
+    public static Class<?> getLoggerClass() {
+        final Class<?> loggerClass = getCustomMapValue(LOGGER_CLASS_KEY, Class.class);
+        // logger class must always be non null
+        if (loggerClass != null) {
+            return loggerClass;
+        }
+        return LogUtils.class.getClass();
+    }
+
+
+    /**
+     * Return Log Level Category from MDC Map
+     *
+     * @return log level category
+     */
+    public static LogLevelCategory getLogLevelCategory() {
+        final LogLevelCategory logLevelCategory = getCustomMapValue(LOG_LEVEL_CATEGORY_KEY, LogLevelCategory.class);
+        if (logLevelCategory != null) {
+            return logLevelCategory;
+        }
+        return LogLevelCategory.ERROR;
+    }
+
+    /**
+     * Creates Default Optional Log spec
+     *
+     * @param loggerClass logger class name
+     * @param logLevelCategory Log leve category
+     *
+     * @return default optional log spec
+     */
+    private static OptionalLogSpecImpl createDefaultOptionalLogSpec(final Class<?> loggerClass,
+                                                                    final LogLevelCategory logLevelCategory) {
+        return new OptionalLogSpecImpl(createDefaultMessageLogInfo(logLevelCategory),
+                createDefaultCodeLogInfo(loggerClass), EELFLoggerDefaults.DEFAULT_CUSTOM_FIELDS_LOG_INFO,
+                EELFLoggerDefaults.DEFAULT_MISC_LOG_INFO);
+    }
+
+
+    /**
+     * Creates Default Code Log Info
+     *
+     * @param loggerClass logger class name
+     *
+     * @return default code log info
+     */
+    private static CodeLogInfoImpl createDefaultCodeLogInfo(final Class<?> loggerClass) {
+        // thread id can be extracted from the framework
+        return new CodeLogInfoImpl(null, loggerClass != null ? loggerClass.getName() : "");
+    }
+
+
+    /**
+     * Creates Default Message Log Info
+     *
+     * @param logLevelCategory Log leve category
+     *
+     * @return default message log info
+     */
+    private static MessageLogInfoImpl createDefaultMessageLogInfo(final LogLevelCategory logLevelCategory) {
+        return new MessageLogInfoImpl(new Date(),
+                getStatusCode(logLevelCategory),
+                getNagiosAlertLevel(logLevelCategory));
+    }
+
+
+    /**
+     * Creates Default App Log Spec
+     *
+     * @return default APP log Spec
+     */
+    public static AppLogInfoImpl createDefaultAppLogInfo() {
+        final String serviceInstanceId =
+                resolveProperty(null, AppLogInfo.Defaults.DEFAULT_SERVICE_INSTANCE_ID,
+                        "SERVICE_NAME", "ServiceInstanceId", "SERVICE_INSTANCE_ID");
+        final String instanceUUID =
+                resolveProperty(null, AppLogInfo.Defaults.DEFAULT_INSTANCE_UUID,
+                        "InstanceUUID", "INSTANCE_UUID");
+        final String virtualServerName =
+                resolveProperty(null, AppLogInfo.Defaults.DEFAULT_VIRTUAL_SERVER_NAME,
+                        "VirtualServerName", "VIRTUAL_SERVER_NAME");
+        final String serverIPAddress = getHostIPAddress() != null ?
+                getHostIPAddress() : AppLogInfo.Defaults.DEFAULT_SERVER_IP_ADDRESS;
+        final String serverFQDN = getHostName() != null ? getHostName() : AppLogInfo.Defaults.DEFAULT_SERVER_FQDN;
+        return new AppLogInfoImpl(serviceInstanceId, instanceUUID, virtualServerName, serverIPAddress, serverFQDN);
+    }
+
+
+    /**
+     * Returns status code based on log level category
+     *
+     * @param logLevelCategory log level category
+     *
+     * @return request status code as string based on log level category
+     */
+    private static RequestStatusCode getStatusCode(final LogLevelCategory logLevelCategory) {
+        if (logLevelCategory == LogLevelCategory.DEBUG || logLevelCategory == LogLevelCategory.INFO ||
+                logLevelCategory == LogLevelCategory.WARN) {
+            return RequestStatusCode.COMPLETE;
+        } else {
+            return RequestStatusCode.ERROR;
+        }
+    }
+
+    /**
+     * Returns nagios Alert level based on log level category
+     *
+     * @param logLevelCategory log level category
+     *
+     * @return nagios alert level
+     */
+    private static NagiosAlertLevel getNagiosAlertLevel(final LogLevelCategory logLevelCategory) {
+        switch (logLevelCategory) {
+            case DEBUG:
+                return NagiosAlertLevel.OK;
+            case INFO:
+                return NagiosAlertLevel.OK;
+            case WARN:
+                return NagiosAlertLevel.WARNING;
+            case ERROR:
+                return NagiosAlertLevel.CRITICAL;
+            case FATAL:
+                return NagiosAlertLevel.CRITICAL;
+            default:
+                return NagiosAlertLevel.UNKNOWN;
+        }
+    }
+
+    /**
+     * Resolves property value if not present
+     *
+     * @param userPassedValue user passed property value
+     * @param defaultValue default value if no value is found after resolving the property
+     * @param propertyNames property names
+     *
+     * @return resolved property value
+     */
+    private static String resolveProperty(
+            final String userPassedValue, final String defaultValue, final String... propertyNames) {
+        // if user passed is present return that value
+        if (userPassedValue != null) {
+            return userPassedValue;
+        }
+        // resolve it using composite resolver
+        final String resolveProperty = resolveProperty(Arrays.asList(propertyNames));
+        return resolveProperty != null ? resolveProperty : defaultValue;
+    }
+
+    /**
+     * Resolves property values in different places
+     *
+     * @param propertyNames property Names
+     *
+     * @return property Value
+     */
+    private static String resolveProperty(final List<String> propertyNames) {
+        return COMPOSITE_PROPERTY_RESOLVER.resolve(propertyNames);
+    }
+
+
+    /**
+     * Determine host IP Address
+     *
+     * @return host ip address
+     */
+    private static String getHostIPAddress() {
+        final InetAddress inetAddress = getInetAddress();
+        if (inetAddress != null) {
+            return inetAddress.getHostAddress();
+        }
+        return null;
+    }
+
+    /**
+     * Determines fully qualified host name
+     *
+     * @return fully qualified host name
+     */
+    private static String getHostName() {
+        final InetAddress inetAddress = getInetAddress();
+        if (inetAddress != null) {
+            return inetAddress.getCanonicalHostName();
+        }
+        return null;
+    }
+
+    /**
+     * Fetches Inet Address
+     *
+     * @return Inet Address
+     */
+    private static InetAddress getInetAddress() {
+        try {
+            return InetAddress.getLocalHost();
+        } catch (UnknownHostException e) {
+            return null;
+        }
+    }
+
+
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/resources/META-INF/services/org.onap.dcae.utils.eelf.logger.api.log.EELFLogger b/eelf-logger/eelf-logger-logback-impl/src/main/resources/META-INF/services/org.onap.dcae.utils.eelf.logger.api.log.EELFLogger
new file mode 100644
index 0000000..d7d5c71
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/resources/META-INF/services/org.onap.dcae.utils.eelf.logger.api.log.EELFLogger
@@ -0,0 +1,20 @@
+#
+# ================================================================================
+# Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+# ================================================================================
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ============LICENSE_END=========================================================
+#
+#
+
+org.onap.dcae.utils.eelf.logger.logback.log.EELFLoggerImpl
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/resources/eelf-async-appenders.xml b/eelf-logger/eelf-logger-logback-impl/src/main/resources/eelf-async-appenders.xml
new file mode 100644
index 0000000..e2e93e4
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/resources/eelf-async-appenders.xml
@@ -0,0 +1,55 @@
+<!--
+  ~ ================================================================================
+  ~ Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+  ~ ================================================================================
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~ ============LICENSE_END=========================================================
+  ~
+  -->
+
+<included>
+
+    <!--
+        ASYNC APPENDERS CAN BE USED TO INCREASE THE PERFORMANCE OF ECOMP LOGGING, HOWEVER, ASYNC LOGGERS
+        CAN DROP MESSAGES IF QUEUE SIZE IF FULL AND DURING SHUT DOWN TIME.
+
+        SO INCREASED PERFORMANCE AT THE COST OF LESS RELIABLE LOGGING
+     -->
+
+    <appender name="asyncAuditLogAppender" class="ch.qos.logback.classic.AsyncAppender">
+        <queueSize>${queueSize}</queueSize>
+        <maxFlushTime>${maxFlushTime}</maxFlushTime>
+        <appender-ref ref="auditLogAppender"/>
+    </appender>
+
+    <appender name="asyncMetricLogAppender" class="ch.qos.logback.classic.AsyncAppender">
+        <queueSize>${queueSize}</queueSize>
+        <maxFlushTime>${maxFlushTime}</maxFlushTime>
+        <appender-ref ref="metricLogAppender"/>
+    </appender>
+
+    <appender name="asyncErrorLogAppender" class="ch.qos.logback.classic.AsyncAppender">
+        <queueSize>${queueSize}</queueSize>
+        <maxFlushTime>${maxFlushTime}</maxFlushTime>
+        <appender-ref ref="errorLogAppender"/>
+    </appender>
+
+    <appender name="asyncDebugLogAppender" class="ch.qos.logback.classic.AsyncAppender">
+        <queueSize>${queueSize}</queueSize>
+        <maxFlushTime>${maxFlushTime}</maxFlushTime>
+        <appender-ref ref="debugLogAppender"/>
+    </appender>
+
+</included>
+
+
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/resources/eelf-defaults.xml b/eelf-logger/eelf-logger-logback-impl/src/main/resources/eelf-defaults.xml
new file mode 100644
index 0000000..f9bb078
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/resources/eelf-defaults.xml
@@ -0,0 +1,51 @@
+<!--
+  ~ ================================================================================
+  ~ Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+  ~ ================================================================================
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~ ============LICENSE_END=========================================================
+  ~
+  -->
+
+<included>
+
+    <!-- LOG DIRECTORIES -->
+    <property scope="context" name="logDir" value="logs"/>
+    <property scope="context" name="debugDir" value="debug-logs"/>
+
+    <!-- SETUP LOG DIRECTORIES -->
+    <property scope="context" name="logDirectory" value="${logDir}/${componentName}"/>
+    <property scope="context" name="debugLogDirectory" value="${debugDir}/${componentName}"/>
+
+    <!--
+    MODIFY LOG DIR ON WINDOWS OS SO THAT TEST LOGS ARE UNDER TARGET DIR CAN BE CLEANED AFTER TESTS AUTOMATICALLY
+     -->
+    <property scope="context" name="modifyLogPathInWindows" value="true" />
+    <property scope="context" name="appendDirectory" value="target" />
+
+    <!-- LOG FILE NAMES -->
+    <property scope="context" name="metricLogName" value="metrics"/>
+    <property scope="context" name="auditLogName" value="audit"/>
+    <property scope="context" name="errorLogName" value="error"/>
+    <property scope="context" name="debugLogName" value="debug"/>
+
+    <!-- ROLLING FILE APPENDER DEFAULT SETTINGS -->
+    <property scope="context" name="minFileIndex" value="1"/>
+    <property scope="context" name="maxFileIndex" value="10"/>
+    <property scope="context" name="maxFileSize" value="2500KB"/>
+
+    <!-- ASYNC APPENDER DEFAULT SETTINGS -->
+    <property scope="context" name="queueSize" value="1024"/>
+    <property scope="context" name="maxFlushTime" value="5000"/>
+
+</included>
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/resources/eelf-logback.xml b/eelf-logger/eelf-logger-logback-impl/src/main/resources/eelf-logback.xml
new file mode 100644
index 0000000..7e08eb2
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/resources/eelf-logback.xml
@@ -0,0 +1,45 @@
+<!--
+  ~ ================================================================================
+  ~ Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+  ~ ================================================================================
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~ ============LICENSE_END=========================================================
+  ~
+  -->
+
+<included>
+
+    <include resource="eelf-defaults.xml"/>
+
+    <!-- CUSTOM STARTUP LISTENER REQUIRED TO SETUP DEFAULT APP LOG INFO DURING STARTUP TIME-->
+    <contextListener class="org.onap.dcae.utils.eelf.logger.logback.listener.LogbackStartupListener"/>
+
+    <!-- ADD REQUIRED APPENDERS -->
+    <include resource="eelf-required-appenders.xml"/>
+
+    <!-- ADD OPTIONAL APPENDERS: NOT ADDED BY DEFAULT -->
+    <!--<include resource="eelf-optional-appenders.xml"/>-->
+
+
+    <root level="DEBUG">
+        <!-- required appenders -->
+        <appender-ref ref="auditLogAppender"/>
+        <appender-ref ref="metricLogAppender"/>
+        <appender-ref ref="errorLogAppender"/>
+
+        <!-- optional appenders: not added by default -->
+        <!--<appender-ref ref="debugLogAppender"/>-->
+        <!--<appender-ref ref="STDOUT"/>-->
+    </root>
+
+</included>
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/resources/eelf-optional-appenders.xml b/eelf-logger/eelf-logger-logback-impl/src/main/resources/eelf-optional-appenders.xml
new file mode 100644
index 0000000..fb7ec7f
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/resources/eelf-optional-appenders.xml
@@ -0,0 +1,68 @@
+<!--
+  ~ ================================================================================
+  ~ Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+  ~ ================================================================================
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~ ============LICENSE_END=========================================================
+  ~
+  -->
+
+<included>
+
+    <!--
+     ============================= DEBUG LOG APPENDER ================================
+     -->
+    <appender name="debugLogAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">
+
+        <filter class="org.onap.dcae.utils.eelf.logger.logback.filter.MarkerFilter">
+            <markers>DEBUG_LOG</markers>
+            <onMatch>ACCEPT</onMatch>
+            <onMismatch>DENY</onMismatch>
+        </filter>
+
+        <file>${debugLogDirectory}/${debugLogName}.log</file>
+
+        <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
+            <fileNamePattern>${logDirectory}/${debugLogName}.%i.log.zip</fileNamePattern>
+            <minIndex>${minFileIndex}</minIndex>
+            <maxIndex>${maxFileIndex}</maxIndex>
+        </rollingPolicy>
+
+        <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
+            <maxFileSize>${maxFileSize}</maxFileSize>
+        </triggeringPolicy>
+
+        <encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
+            <layout class="org.onap.dcae.utils.eelf.logger.logback.layout.DebugLogLayout"/>
+        </encoder>
+
+    </appender>
+
+
+    <!--
+      ============================= CONSOLE APPENDER ================================
+     -->
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+
+        <filter class="org.onap.dcae.utils.eelf.logger.logback.filter.MarkerFilter">
+            <markers>METRIC_LOG,AUDIT_LOG,ERROR_LOG,DEBUG_LOG</markers>
+            <onMatch>ACCEPT</onMatch>
+            <onMismatch>DENY</onMismatch>
+        </filter>
+
+        <encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
+            <layout class="org.onap.dcae.utils.eelf.logger.logback.layout.ConsoleLayout"/>
+        </encoder>
+    </appender>
+
+</included>
diff --git a/eelf-logger/eelf-logger-logback-impl/src/main/resources/eelf-required-appenders.xml b/eelf-logger/eelf-logger-logback-impl/src/main/resources/eelf-required-appenders.xml
new file mode 100644
index 0000000..72f1a5d
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/main/resources/eelf-required-appenders.xml
@@ -0,0 +1,112 @@
+<!--
+  ~ ================================================================================
+  ~ Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+  ~ ================================================================================
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~ ============LICENSE_END=========================================================
+  ~
+  -->
+
+<included>
+
+    <!--
+     ============================= AUDIT LOG APPENDER ================================
+     -->
+    <appender name="auditLogAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">
+
+        <filter class="org.onap.dcae.utils.eelf.logger.logback.filter.MarkerFilter">
+            <markers>AUDIT_LOG</markers>
+            <onMatch>ACCEPT</onMatch>
+            <onMismatch>DENY</onMismatch>
+        </filter>
+
+        <file>${logDirectory}/${auditLogName}.log</file>
+
+        <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
+            <fileNamePattern>${logDirectory}/${auditLogName}.%i.log.zip</fileNamePattern>
+            <minIndex>${minFileIndex}</minIndex>
+            <maxIndex>${maxFileIndex}</maxIndex>
+        </rollingPolicy>
+
+        <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
+            <maxFileSize>${maxFileSize}</maxFileSize>
+        </triggeringPolicy>
+
+        <encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
+            <layout class="org.onap.dcae.utils.eelf.logger.logback.layout.AuditLogLayout"/>
+        </encoder>
+
+    </appender>
+
+
+    <!--
+     ============================= METRIC LOG APPENDER ================================
+     -->
+    <appender name="metricLogAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">
+
+        <filter class="org.onap.dcae.utils.eelf.logger.logback.filter.MarkerFilter">
+            <markers>METRIC_LOG</markers>
+            <onMatch>ACCEPT</onMatch>
+            <onMismatch>DENY</onMismatch>
+        </filter>
+
+        <file>${logDirectory}/${metricLogName}.log</file>
+
+        <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
+            <fileNamePattern>${logDirectory}/${metricLogName}.%i.log.zip</fileNamePattern>
+            <minIndex>${minFileIndex}</minIndex>
+            <maxIndex>${maxFileIndex}</maxIndex>
+        </rollingPolicy>
+
+        <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
+            <maxFileSize>${maxFileSize}</maxFileSize>
+        </triggeringPolicy>
+
+        <encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
+            <layout class="org.onap.dcae.utils.eelf.logger.logback.layout.MetricLogLayout"/>
+        </encoder>
+
+    </appender>
+
+
+    <!--
+     ============================= ERROR LOG APPENDER ================================
+    -->
+    <appender name="errorLogAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">
+
+        <filter class="org.onap.dcae.utils.eelf.logger.logback.filter.MarkerFilter">
+            <markers>ERROR_LOG</markers>
+            <onMatch>ACCEPT</onMatch>
+            <onMismatch>DENY</onMismatch>
+        </filter>
+
+        <file>${logDirectory}/${errorLogName}.log</file>
+
+        <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
+            <fileNamePattern>${logDirectory}/${errorLogName}.%i.log.zip</fileNamePattern>
+            <minIndex>${minFileIndex}</minIndex>
+            <maxIndex>${maxFileIndex}</maxIndex>
+        </rollingPolicy>
+
+        <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
+            <maxFileSize>${maxFileSize}</maxFileSize>
+        </triggeringPolicy>
+
+        <encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
+            <layout class="org.onap.dcae.utils.eelf.logger.logback.layout.ErrorLogLayout"/>
+        </encoder>
+
+    </appender>
+
+
+</included>
diff --git a/eelf-logger/eelf-logger-logback-impl/src/test/java/org/onap/dcae/utils/eelf/logger/logback/BaseLogbackUnitTest.java b/eelf-logger/eelf-logger-logback-impl/src/test/java/org/onap/dcae/utils/eelf/logger/logback/BaseLogbackUnitTest.java
new file mode 100644
index 0000000..fda4355
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/test/java/org/onap/dcae/utils/eelf/logger/logback/BaseLogbackUnitTest.java
@@ -0,0 +1,157 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback;
+
+
+import org.onap.dcae.utils.eelf.logger.api.info.CodeLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.CustomFieldsLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.ErrorLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.MessageLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.MiscLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.NagiosAlertLevel;
+import org.onap.dcae.utils.eelf.logger.api.info.RequestIdLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.RequestStatusCode;
+import org.onap.dcae.utils.eelf.logger.api.info.RequestTimingLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.ResponseLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.ServiceLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.TargetServiceLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.spec.AuditLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.DebugLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.ErrorLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.MetricLogSpec;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+import org.onap.dcae.utils.eelf.logger.model.info.CodeLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.CustomFieldsLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.ErrorLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.MessageLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.MiscLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.RequestIdLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.RequestTimingLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.ResponseLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.ServiceLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.info.TargetServiceLogInfoImpl;
+import org.onap.dcae.utils.eelf.logger.model.spec.AuditLogSpecImpl;
+import org.onap.dcae.utils.eelf.logger.model.spec.DebugLogSpecImpl;
+import org.onap.dcae.utils.eelf.logger.model.spec.ErrorLogSpecImpl;
+import org.onap.dcae.utils.eelf.logger.model.spec.MetricLogSpecImpl;
+import org.onap.dcae.utils.eelf.logger.model.spec.OptionalLogSpecImpl;
+
+import java.util.Date;
+
+/**
+ * Base Logback Unit Test.
+ *
+ * @author Rajiv Singla
+ */
+public abstract class BaseLogbackUnitTest {
+
+    protected static final String TEST_SERVICE_INSTANCE_ID = "testServiceInstanceID";
+    protected static final String TEST_INSTANCE_UUID = "";
+
+    static {
+        System.setProperty("ServiceInstanceId", TEST_SERVICE_INSTANCE_ID);
+        System.setProperty("InstanceUUID", TEST_INSTANCE_UUID);
+    }
+
+    protected static final String TEST_REQUEST_ID = "403cdad8-4de7-450d-b441-561001decdd6";
+    protected static final String TEST_SERVICE_NAME = "testServiceName";
+    protected static final String TEST_PARTNER_NAME = "testPartnerName";
+    protected static final String TEST_CLIENT_IP_ADDRESS = "";
+
+    protected static final Date START_DATE = new Date();
+    protected static final Date END_DATE = new Date(new Date().getTime() + 30_000);
+    protected static final Long ELAPSED_TIME = END_DATE.getTime() - START_DATE.getTime();
+
+    protected static final Integer RESPONSE_CODE = 200;
+    protected static final String RESPONSE_DESCRIPTION = "TEST RESPONSE DESCRIPTION";
+
+    protected static final String TEST_TARGET_ENTITY = "testTargetEntity";
+    protected static final String TEST_TARGET_SERVICE_NAME = "testTargetServiceName";
+    protected static final String TEST_TARGET_VIRTUAL_ENTITY = "testTargetVirtualEntity";
+
+
+    protected static final String TEST_THREAD_ID = "testThreadId";
+    protected static final String TEST_CLASS_NAME = "testClassName";
+
+    protected static final String TEST_CUSTOM_FIELD1 = "testCustomField1";
+    protected static final String TEST_CUSTOM_FIELD2 = "testCustomField2";
+    protected static final String TEST_CUSTOM_FIELD3 = "testCustomField3";
+    protected static final String TEST_CUSTOM_FIELD4 = "testCustomField4";
+
+    protected static final String TEST_PROCESS_KEY = "testProcessId";
+
+    protected static final Integer TEST_ERROR_CODE = 500;
+    protected static final String TEST_ERROR_CODE_DESCRIPTION = "TEST ERROR CODE DESCRIPTION";
+
+
+    protected static RequestIdLogInfo getTestRequestIdLogInfo() {
+        return new RequestIdLogInfoImpl(TEST_REQUEST_ID);
+    }
+
+    protected static ServiceLogInfo getTestServiceLogInfo() {
+        return new ServiceLogInfoImpl(TEST_SERVICE_NAME, TEST_PARTNER_NAME, TEST_CLIENT_IP_ADDRESS);
+    }
+
+    protected static RequestTimingLogInfo getTestRequestTimingInfo() {
+        return new RequestTimingLogInfoImpl(START_DATE, END_DATE, ELAPSED_TIME);
+    }
+
+    protected static ResponseLogInfo getTestResponseLogInfo() {
+        return new ResponseLogInfoImpl(RESPONSE_CODE, RESPONSE_DESCRIPTION);
+    }
+
+    protected static AuditLogSpec getTestAuditLogSpec() {
+        return new AuditLogSpecImpl(getTestRequestIdLogInfo(), getTestServiceLogInfo(),
+                getTestRequestTimingInfo(), getTestResponseLogInfo());
+    }
+
+    protected static DebugLogSpec getTestDebugLogSpec() {
+        return new DebugLogSpecImpl(getTestRequestIdLogInfo());
+    }
+
+    protected static TargetServiceLogInfo getTestTargetServiceLogInfo() {
+        return new TargetServiceLogInfoImpl(TEST_TARGET_ENTITY, TEST_TARGET_SERVICE_NAME, TEST_TARGET_VIRTUAL_ENTITY);
+    }
+
+    protected static MetricLogSpec getTestMetricLogSpec() {
+        return new MetricLogSpecImpl(getTestRequestIdLogInfo(), getTestServiceLogInfo(),
+                getTestRequestTimingInfo(), getTestResponseLogInfo(), getTestTargetServiceLogInfo());
+    }
+
+    protected static ErrorLogInfo getTestErrorLogInfo() {
+        return new ErrorLogInfoImpl(TEST_ERROR_CODE, TEST_ERROR_CODE_DESCRIPTION);
+    }
+
+    protected static ErrorLogSpec getTestErrorLogSpec() {
+        return new ErrorLogSpecImpl(getTestRequestIdLogInfo(), getTestServiceLogInfo(), getTestTargetServiceLogInfo()
+                , getTestErrorLogInfo());
+    }
+
+    protected static OptionalLogSpec getTestOptionalLogSpec() {
+        final MessageLogInfo messageLogInfo = new MessageLogInfoImpl(new Date(), RequestStatusCode.COMPLETE,
+                NagiosAlertLevel.OK);
+        final CodeLogInfo codeLogInfo = new CodeLogInfoImpl(TEST_THREAD_ID, TEST_CLASS_NAME);
+        final CustomFieldsLogInfo customFieldsLogInfo = new CustomFieldsLogInfoImpl(TEST_CUSTOM_FIELD1,
+                TEST_CUSTOM_FIELD2, TEST_CUSTOM_FIELD3, TEST_CUSTOM_FIELD4);
+        final MiscLogInfo miscLogInfo = new MiscLogInfoImpl(TEST_PROCESS_KEY, "");
+        return new OptionalLogSpecImpl(messageLogInfo, codeLogInfo, customFieldsLogInfo, miscLogInfo);
+    }
+
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/test/java/org/onap/dcae/utils/eelf/logger/logback/log/AuditLogImplTest.java b/eelf-logger/eelf-logger-logback-impl/src/test/java/org/onap/dcae/utils/eelf/logger/logback/log/AuditLogImplTest.java
new file mode 100644
index 0000000..02b377a
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/test/java/org/onap/dcae/utils/eelf/logger/logback/log/AuditLogImplTest.java
@@ -0,0 +1,66 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.log;
+
+import org.junit.Test;
+import org.onap.dcae.utils.eelf.logger.api.log.EELFLogFactory;
+import org.onap.dcae.utils.eelf.logger.api.log.EELFLogger;
+import org.onap.dcae.utils.eelf.logger.api.spec.AuditLogSpec;
+import org.onap.dcae.utils.eelf.logger.logback.BaseLogbackUnitTest;
+import org.onap.dcae.utils.eelf.logger.logback.EELFLoggerDefaults;
+import org.onap.dcae.utils.eelf.logger.model.spec.AuditLogSpecImpl;
+
+/**
+ * Tests for Audit log implementations.
+ *
+ * @author Rajiv Singla
+ */
+public class AuditLogImplTest extends BaseLogbackUnitTest {
+
+    private static final EELFLogger LOG = EELFLogFactory.getLogger(AuditLogImplTest.class);
+
+    @Test
+    public void auditLoggerTest() throws Exception {
+
+        LOG.auditLog().info("Test Audit info message: {}",
+                getTestAuditLogSpec(), getTestOptionalLogSpec(), "infoArg");
+
+        final AuditLogSpec emptyAuditLog = new AuditLogSpecImpl(null, null,
+                null, null);
+
+        LOG.auditLog().info("Test Empty Audit info message.", emptyAuditLog,
+                EELFLoggerDefaults.DEFAULT_OPTIONAL_LOG_SPEC);
+
+    }
+
+
+    @Test
+    public void auditLoggerTestWithWarnLogLevel() throws Exception {
+        LOG.auditLog().warn("Test Audit warn message: {}",
+                getTestAuditLogSpec(), getTestOptionalLogSpec(), "warnArg");
+    }
+
+    @Test
+    public void auditLoggerTestWithErrorLogLevel() throws Exception {
+        LOG.auditLog().error("Test Audit error message: {}",
+                getTestAuditLogSpec(), getTestOptionalLogSpec(), "errorArg");
+
+    }
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/test/java/org/onap/dcae/utils/eelf/logger/logback/log/DebugLogImplTest.java b/eelf-logger/eelf-logger-logback-impl/src/test/java/org/onap/dcae/utils/eelf/logger/logback/log/DebugLogImplTest.java
new file mode 100644
index 0000000..76d41f9
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/test/java/org/onap/dcae/utils/eelf/logger/logback/log/DebugLogImplTest.java
@@ -0,0 +1,53 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.log;
+
+import org.junit.Test;
+import org.onap.dcae.utils.eelf.logger.api.log.EELFLogFactory;
+import org.onap.dcae.utils.eelf.logger.api.log.EELFLogger;
+import org.onap.dcae.utils.eelf.logger.api.spec.DebugLogSpec;
+import org.onap.dcae.utils.eelf.logger.logback.BaseLogbackUnitTest;
+import org.onap.dcae.utils.eelf.logger.logback.EELFLoggerDefaults;
+import org.onap.dcae.utils.eelf.logger.model.spec.DebugLogSpecImpl;
+
+
+/**
+ * Test for Debug log implementation.
+ *
+ * @author Rajiv Singla
+ */
+public class DebugLogImplTest extends BaseLogbackUnitTest {
+
+    private static final EELFLogger LOG = EELFLogFactory.getLogger(DebugLogImplTest.class);
+
+    @Test
+    public void debugLoggerTest() throws Exception {
+
+        LOG.debugLog().debug("Test DebugLog debug message: {}",
+                getTestDebugLogSpec(), getTestOptionalLogSpec(), "debugArg");
+
+        final DebugLogSpec emptyDebugLog = new DebugLogSpecImpl(null);
+
+        LOG.debugLog().debug("Test Empty DebugLog debug message.", emptyDebugLog,
+                EELFLoggerDefaults.DEFAULT_OPTIONAL_LOG_SPEC);
+
+    }
+
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/test/java/org/onap/dcae/utils/eelf/logger/logback/log/ErrorLogImplTest.java b/eelf-logger/eelf-logger-logback-impl/src/test/java/org/onap/dcae/utils/eelf/logger/logback/log/ErrorLogImplTest.java
new file mode 100644
index 0000000..0b96be5
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/test/java/org/onap/dcae/utils/eelf/logger/logback/log/ErrorLogImplTest.java
@@ -0,0 +1,61 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.log;
+
+import org.junit.Test;
+import org.onap.dcae.utils.eelf.logger.api.log.EELFLogFactory;
+import org.onap.dcae.utils.eelf.logger.api.log.EELFLogger;
+import org.onap.dcae.utils.eelf.logger.api.spec.ErrorLogSpec;
+import org.onap.dcae.utils.eelf.logger.logback.BaseLogbackUnitTest;
+import org.onap.dcae.utils.eelf.logger.logback.EELFLoggerDefaults;
+import org.onap.dcae.utils.eelf.logger.model.spec.ErrorLogSpecImpl;
+
+
+/**
+ * Tests for Error Log implementation.
+ *
+ * @author Rajiv Singla
+ */
+public class ErrorLogImplTest extends BaseLogbackUnitTest {
+
+    private static final EELFLogger LOG = EELFLogFactory.getLogger(ErrorLogImplTest.class);
+
+    @Test
+    public void errorLoggerTest() throws Exception {
+        LOG.errorLog().error("Test ErrorLog error message: {}",
+                getTestErrorLogSpec(), getTestOptionalLogSpec(), "errorArg");
+
+        final ErrorLogSpec emptyErrorLog = new ErrorLogSpecImpl(null, null,
+                null, null);
+
+        LOG.errorLog().error("Test Empty ErrorLog error message", emptyErrorLog,
+                EELFLoggerDefaults.DEFAULT_OPTIONAL_LOG_SPEC);
+
+    }
+
+    @Test
+    public void errorLoggerTestWithWarnLogLevel() throws Exception {
+        LOG.errorLog().warn("Test errorLog warn message: {}", getTestErrorLogSpec(), getTestOptionalLogSpec(),
+                "warnArg");
+
+    }
+
+
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/test/java/org/onap/dcae/utils/eelf/logger/logback/log/MetricLogImplTest.java b/eelf-logger/eelf-logger-logback-impl/src/test/java/org/onap/dcae/utils/eelf/logger/logback/log/MetricLogImplTest.java
new file mode 100644
index 0000000..8df1e9c
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/test/java/org/onap/dcae/utils/eelf/logger/logback/log/MetricLogImplTest.java
@@ -0,0 +1,67 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.logback.log;
+
+import org.junit.Test;
+import org.onap.dcae.utils.eelf.logger.api.log.EELFLogFactory;
+import org.onap.dcae.utils.eelf.logger.api.log.EELFLogger;
+import org.onap.dcae.utils.eelf.logger.api.spec.MetricLogSpec;
+import org.onap.dcae.utils.eelf.logger.logback.BaseLogbackUnitTest;
+import org.onap.dcae.utils.eelf.logger.logback.EELFLoggerDefaults;
+import org.onap.dcae.utils.eelf.logger.model.spec.MetricLogSpecImpl;
+
+
+/**
+ * Tests for Metric Log implementation.
+ *
+ * @author Rajiv Singla
+ */
+public class MetricLogImplTest extends BaseLogbackUnitTest {
+
+    private static final EELFLogger LOG = EELFLogFactory.getLogger(MetricLogImplTest.class);
+
+    @Test
+    public void metricLoggerTest() throws Exception {
+
+        LOG.metricLog().info("test Metric info message: {}", getTestMetricLogSpec(), getTestOptionalLogSpec(),
+                "infoArg");
+
+        final MetricLogSpec emptyMetricLog = new MetricLogSpecImpl(null, null, null, null, null);
+
+        LOG.metricLog().info("Test Empty Metric info message", emptyMetricLog,
+                EELFLoggerDefaults.DEFAULT_OPTIONAL_LOG_SPEC);
+    }
+
+    @Test
+    public void metricLoggerTestWithWarnLogLevel() throws Exception {
+        LOG.metricLog().warn("test Metric warn message: {}", getTestMetricLogSpec(), getTestOptionalLogSpec(),
+                "warnArg");
+
+    }
+
+    @Test
+    public void metricLoggerTestWithErrorLogLevel() throws Exception {
+        LOG.metricLog().warn("test Metric error message: {}", getTestMetricLogSpec(), getTestOptionalLogSpec(),
+                "errorArg");
+
+
+    }
+
+}
diff --git a/eelf-logger/eelf-logger-logback-impl/src/test/resources/logback.xml b/eelf-logger/eelf-logger-logback-impl/src/test/resources/logback.xml
new file mode 100644
index 0000000..b1cffd6
--- /dev/null
+++ b/eelf-logger/eelf-logger-logback-impl/src/test/resources/logback.xml
@@ -0,0 +1,41 @@
+<!--
+  ~ ================================================================================
+  ~ Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+  ~ ================================================================================
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~ ============LICENSE_END=========================================================
+  ~
+  -->
+<configuration>
+
+    <!-- SET EELF COMPONENT NAME -->
+    <property scope="context" name="componentName" value="test-eelf-logger"/>
+    <contextName>${componentName}</contextName>
+
+    <include resource="eelf-logback.xml"/>
+
+    <include resource="eelf-optional-appenders.xml"/>
+
+    <root level="DEBUG">
+        <!-- required appenders -->
+        <appender-ref ref="auditLogAppender"/>
+        <appender-ref ref="metricLogAppender"/>
+        <appender-ref ref="errorLogAppender"/>
+
+        <!-- optional appenders -->
+        <appender-ref ref="debugLogAppender"/>
+        <appender-ref ref="STDOUT"/>
+    </root>
+
+
+</configuration>
diff --git a/eelf-logger/eelf-logger-model/pom.xml b/eelf-logger/eelf-logger-model/pom.xml
new file mode 100644
index 0000000..86f269a
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/pom.xml
@@ -0,0 +1,77 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ ================================================================================
+  ~ Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+  ~ ================================================================================
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~ ============LICENSE_END=========================================================
+  ~
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.onap.dcaegen2.utils</groupId>
+        <artifactId>eelf-logger</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>eelf-logger-model</artifactId>
+    <packaging>jar</packaging>
+
+
+    <!-- EELF LOGGER MODELS CONTAINS IMMUTABLE MODEL OBJECTS FOR VARIOUS EELF LOGGER INTERFACES -->
+    <name>dcaegen2-utils-eelf-logger-model</name>
+    <description>Contains immutable model objects for various EELF Logger interfaces</description>
+
+    <properties>
+        <main.basedir>${project.parent.basedir}</main.basedir>
+        <!-- SONAR SETTINGS : EXCLUDE TEST COVERAGE AS MODEL ONLY CONTAINS POJOs AND NO BUSINESS LOGIC-->
+        <sonar.coverage.exclusions>**/model/**</sonar.coverage.exclusions>
+    </properties>
+
+    <!-- NOTE: THIS MODULE MUST NOT HAVE ANY DEPENDENCY BESIDES ECOMP LOGGER API IN COMPILE SCOPE -->
+    <dependencies>
+
+        <!-- ECOMP LOGGER API -->
+        <dependency>
+            <groupId>${project.groupId}</groupId>
+            <artifactId>eelf-logger-api</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+
+        <!-- LOMBOK IS USED FOR CODE GENERATION IN PROVIDED SCOPE (NOT IN COMPILE SCOPE) -->
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <sourceDirectory>${project.build.directory}/generated-sources/delombok</sourceDirectory>
+        <plugins>
+            <plugin>
+                <groupId>org.projectlombok</groupId>
+                <artifactId>lombok-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+
+
+</project>
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/AppLogInfoImpl.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/AppLogInfoImpl.java
new file mode 100644
index 0000000..689915c
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/AppLogInfoImpl.java
@@ -0,0 +1,53 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.model.info;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.Wither;
+import org.onap.dcae.utils.eelf.logger.api.info.AppLogInfo;
+
+/**
+ * Concrete model implementation for {@link AppLogInfo}
+ *
+ * @author Rajiv Singla
+ */
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+@ToString
+@Wither
+public class AppLogInfoImpl implements AppLogInfo {
+
+    private static final long serialVersionUID = 1L;
+
+    private String serviceInstanceID;
+
+    private String instanceUUID;
+
+    private String virtualServerName;
+
+    private String serverIPAddress;
+
+    private String serverFQDN;
+
+}
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/CodeLogInfoImpl.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/CodeLogInfoImpl.java
new file mode 100644
index 0000000..7f5eb2f
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/CodeLogInfoImpl.java
@@ -0,0 +1,48 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.model.info;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.Wither;
+import org.onap.dcae.utils.eelf.logger.api.info.CodeLogInfo;
+
+/**
+ * Concrete model implementation for {@link CodeLogInfo}
+ *
+ * @author Rajiv Singla
+ */
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+@ToString
+@Wither
+public class CodeLogInfoImpl implements CodeLogInfo {
+
+    private static final long serialVersionUID = 1L;
+
+    private String threadId;
+
+    private String className;
+
+
+}
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/CustomFieldsLogInfoImpl.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/CustomFieldsLogInfoImpl.java
new file mode 100644
index 0000000..151900d
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/CustomFieldsLogInfoImpl.java
@@ -0,0 +1,51 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.model.info;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.Wither;
+import org.onap.dcae.utils.eelf.logger.api.info.CustomFieldsLogInfo;
+
+/**
+ * Concrete model implementation for {@link CustomFieldsLogInfo}
+ *
+ * @author Rajiv Singla
+ */
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+@ToString
+@Wither
+public class CustomFieldsLogInfoImpl implements CustomFieldsLogInfo {
+
+    private static final long serialVersionUID = 1L;
+
+    private String customField1;
+
+    private String customField2;
+
+    private String customField3;
+
+    private String customField4;
+
+}
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/ErrorLogInfoImpl.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/ErrorLogInfoImpl.java
new file mode 100644
index 0000000..18c2e95
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/ErrorLogInfoImpl.java
@@ -0,0 +1,47 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.model.info;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.Wither;
+import org.onap.dcae.utils.eelf.logger.api.info.ErrorLogInfo;
+
+/**
+ * Concrete model implementation for {@link ErrorLogInfo}
+ *
+ * @author Rajiv Singla
+ */
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+@ToString
+@Wither
+public class ErrorLogInfoImpl implements ErrorLogInfo {
+
+    private static final long serialVersionUID = 1L;
+
+    private Integer errorCode;
+
+    private String errorDescription;
+
+}
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/MessageLogInfoImpl.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/MessageLogInfoImpl.java
new file mode 100644
index 0000000..65e722a
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/MessageLogInfoImpl.java
@@ -0,0 +1,54 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.model.info;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.Wither;
+import org.onap.dcae.utils.eelf.logger.api.info.MessageLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.NagiosAlertLevel;
+import org.onap.dcae.utils.eelf.logger.api.info.RequestStatusCode;
+
+
+import java.util.Date;
+
+/**
+ * Concrete model implementation for {@link MessageLogInfo}
+ *
+ * @author Rajiv Singla
+ */
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+@ToString
+@Wither
+public class MessageLogInfoImpl implements MessageLogInfo {
+
+    private static final long serialVersionUID = 1L;
+
+    private Date creationTimestamp;
+
+    private RequestStatusCode statusCode;
+
+    private NagiosAlertLevel alertSeverity;
+
+}
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/MiscLogInfoImpl.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/MiscLogInfoImpl.java
new file mode 100644
index 0000000..f7e648b
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/MiscLogInfoImpl.java
@@ -0,0 +1,47 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.model.info;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.Wither;
+import org.onap.dcae.utils.eelf.logger.api.info.MiscLogInfo;
+
+/**
+ * Concrete model implementation for {@link MiscLogInfo}
+ *
+ * @author Rajiv Singla
+ */
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+@ToString
+@Wither
+public class MiscLogInfoImpl implements MiscLogInfo {
+
+    private static final long serialVersionUID = 1L;
+
+    private String processId;
+
+    private String unused;
+
+}
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/RequestIdLogInfoImpl.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/RequestIdLogInfoImpl.java
new file mode 100644
index 0000000..af939c4
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/RequestIdLogInfoImpl.java
@@ -0,0 +1,45 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.model.info;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.Wither;
+import org.onap.dcae.utils.eelf.logger.api.info.RequestIdLogInfo;
+
+/**
+ * Concrete model implementation for {@link RequestIdLogInfo}
+ *
+ * @author Rajiv Singla
+ */
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+@ToString
+@Wither
+public class RequestIdLogInfoImpl implements RequestIdLogInfo {
+
+    private static final long serialVersionUID = 1L;
+
+    private String requestId;
+
+}
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/RequestTimingLogInfoImpl.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/RequestTimingLogInfoImpl.java
new file mode 100644
index 0000000..19d860b
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/RequestTimingLogInfoImpl.java
@@ -0,0 +1,51 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.model.info;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.Wither;
+import org.onap.dcae.utils.eelf.logger.api.info.RequestTimingLogInfo;
+
+import java.util.Date;
+
+/**
+ * Concrete model implementation for {@link RequestTimingLogInfo}
+ *
+ * @author Rajiv Singla
+ */
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+@ToString
+@Wither
+public class RequestTimingLogInfoImpl implements RequestTimingLogInfo {
+
+    private static final long serialVersionUID = 1L;
+
+    private Date beginTimestamp;
+
+    private Date endTimestamp;
+
+    private Long elapsedTime;
+
+}
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/ResponseLogInfoImpl.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/ResponseLogInfoImpl.java
new file mode 100644
index 0000000..1f0bfbf
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/ResponseLogInfoImpl.java
@@ -0,0 +1,47 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.model.info;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.Wither;
+import org.onap.dcae.utils.eelf.logger.api.info.ResponseLogInfo;
+
+/**
+ * Concrete model implementation for {@link ResponseLogInfo}
+ *
+ * @author Rajiv Singla
+ */
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+@ToString
+@Wither
+public class ResponseLogInfoImpl implements ResponseLogInfo {
+
+    private static final long serialVersionUID = 1L;
+
+    private Integer responseCode;
+
+    private String responseDescription;
+
+}
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/ServiceLogInfoImpl.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/ServiceLogInfoImpl.java
new file mode 100644
index 0000000..68d1f41
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/ServiceLogInfoImpl.java
@@ -0,0 +1,49 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.model.info;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.Wither;
+import org.onap.dcae.utils.eelf.logger.api.info.ServiceLogInfo;
+
+/**
+ * Concrete model implementation for {@link ServiceLogInfo}
+ *
+ * @author Rajiv Singla
+ */
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+@ToString
+@Wither
+public class ServiceLogInfoImpl implements ServiceLogInfo {
+
+    private static final long serialVersionUID = 1L;
+
+    private String serviceName;
+
+    private String partnerName;
+
+    private String clientIPAddress;
+
+}
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/TargetServiceLogInfoImpl.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/TargetServiceLogInfoImpl.java
new file mode 100644
index 0000000..4a41e73
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/TargetServiceLogInfoImpl.java
@@ -0,0 +1,48 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.model.info;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.Wither;
+import org.onap.dcae.utils.eelf.logger.api.info.TargetServiceLogInfo;
+
+/**
+ * Concrete model implementation for {@link TargetServiceLogInfo}
+ *
+ * @author Rajiv Singla
+ */
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+@ToString
+@Wither
+public class TargetServiceLogInfoImpl implements TargetServiceLogInfo {
+
+    private static final long serialVersionUID = 1L;
+
+    private String targetEntity;
+
+    private String targetServiceName;
+
+    private String targetVirtualEntity;
+}
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/package-info.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/package-info.java
new file mode 100644
index 0000000..ce0966e
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/info/package-info.java
@@ -0,0 +1,23 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+/**
+ * Contains immutable implementations for EELF Logging Information interfaces
+ */
+package org.onap.dcae.utils.eelf.logger.model.info;
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/AppLogSpecImpl.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/AppLogSpecImpl.java
new file mode 100644
index 0000000..d1e40ad
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/AppLogSpecImpl.java
@@ -0,0 +1,47 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.model.spec;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.Delegate;
+import org.onap.dcae.utils.eelf.logger.api.info.AppLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.spec.AppLogSpec;
+
+
+/**
+ * Concrete model implementation for {@link AppLogSpec}
+ *
+ * @author Rajiv Singla
+ */
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+@ToString
+public class AppLogSpecImpl implements AppLogSpec {
+
+    private static final long serialVersionUID = 1L;
+
+    @Delegate(types = AppLogSpec.class)
+    private AppLogInfo appLogInfo;
+
+}
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/AuditLogSpecImpl.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/AuditLogSpecImpl.java
new file mode 100644
index 0000000..c217595
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/AuditLogSpecImpl.java
@@ -0,0 +1,61 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.model.spec;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.Delegate;
+import lombok.experimental.Wither;
+import org.onap.dcae.utils.eelf.logger.api.info.RequestIdLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.RequestTimingLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.ResponseLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.ServiceLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.spec.AuditLogSpec;
+
+
+/**
+ * Concrete model implementation for {@link AuditLogSpec}
+ *
+ * @author Rajiv Singla
+ */
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+@ToString
+@Wither
+public class AuditLogSpecImpl implements AuditLogSpec {
+
+    private static final long serialVersionUID = 1L;
+
+    @Delegate(types = RequestIdLogInfo.class)
+    private RequestIdLogInfo requestIdLogInfo;
+
+    @Delegate(types = ServiceLogInfo.class)
+    private ServiceLogInfo serviceLogInfo;
+
+    @Delegate(types = RequestTimingLogInfo.class)
+    private RequestTimingLogInfo requestTimingLogInfo;
+
+    @Delegate(types = ResponseLogInfo.class)
+    private ResponseLogInfo responseLogInfo;
+
+}
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/DebugLogSpecImpl.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/DebugLogSpecImpl.java
new file mode 100644
index 0000000..53a1070
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/DebugLogSpecImpl.java
@@ -0,0 +1,48 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.model.spec;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.Delegate;
+import lombok.experimental.Wither;
+import org.onap.dcae.utils.eelf.logger.api.info.RequestIdLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.spec.DebugLogSpec;
+
+
+/**
+ * Concrete model implementation for {@link DebugLogSpec}
+ *
+ * @author Rajiv Singla
+ */
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+@ToString
+@Wither
+public class DebugLogSpecImpl implements DebugLogSpec {
+
+    private static final long serialVersionUID = 1L;
+
+    @Delegate(types = RequestIdLogInfo.class)
+    private RequestIdLogInfo requestIdLogInfo;
+}
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/ErrorLogSpecImpl.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/ErrorLogSpecImpl.java
new file mode 100644
index 0000000..6e73fcf
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/ErrorLogSpecImpl.java
@@ -0,0 +1,61 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.model.spec;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.Delegate;
+import lombok.experimental.Wither;
+import org.onap.dcae.utils.eelf.logger.api.info.ErrorLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.RequestIdLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.ServiceLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.TargetServiceLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.spec.ErrorLogSpec;
+
+
+/**
+ * Concrete model implementation for {@link ErrorLogSpec}
+ *
+ * @author Rajiv Singla
+ */
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+@ToString
+@Wither
+public class ErrorLogSpecImpl implements ErrorLogSpec {
+
+    private static final long serialVersionUID = 1L;
+
+    @Delegate(types = RequestIdLogInfo.class)
+    private RequestIdLogInfo requestIdLogInfo;
+
+    @Delegate(types = ServiceLogInfo.class)
+    private ServiceLogInfo serviceLogInfo;
+
+    @Delegate(types = TargetServiceLogInfo.class)
+    private TargetServiceLogInfo targetServiceLogInfo;
+
+    @Delegate(types = ErrorLogInfo.class)
+    private ErrorLogInfo errorLogInfo;
+
+}
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/MetricLogSpecImpl.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/MetricLogSpecImpl.java
new file mode 100644
index 0000000..d910bc2
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/MetricLogSpecImpl.java
@@ -0,0 +1,64 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.model.spec;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.Delegate;
+import lombok.experimental.Wither;
+import org.onap.dcae.utils.eelf.logger.api.info.RequestIdLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.RequestTimingLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.ResponseLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.ServiceLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.TargetServiceLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.spec.MetricLogSpec;
+
+
+/**
+ * Concrete model implementation for {@link MetricLogSpec}
+ *
+ * @author Rajiv Singla
+ */
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+@ToString
+@Wither
+public class MetricLogSpecImpl implements MetricLogSpec {
+
+    private static final long serialVersionUID = 1L;
+
+    @Delegate(types = RequestIdLogInfo.class)
+    private RequestIdLogInfo requestIdLogInfo;
+
+    @Delegate(types = ServiceLogInfo.class)
+    private ServiceLogInfo serviceLogInfo;
+
+    @Delegate(types = RequestTimingLogInfo.class)
+    private RequestTimingLogInfo requestTimingLogInfo;
+
+    @Delegate(types = ResponseLogInfo.class)
+    private ResponseLogInfo responseLogInfo;
+
+    @Delegate(types = TargetServiceLogInfo.class)
+    private TargetServiceLogInfo targetServiceLogInfo;
+}
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/OptionalLogSpecImpl.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/OptionalLogSpecImpl.java
new file mode 100644
index 0000000..755b4bf
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/OptionalLogSpecImpl.java
@@ -0,0 +1,60 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.onap.dcae.utils.eelf.logger.model.spec;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.Delegate;
+import lombok.experimental.Wither;
+import org.onap.dcae.utils.eelf.logger.api.info.CodeLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.CustomFieldsLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.MessageLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.info.MiscLogInfo;
+import org.onap.dcae.utils.eelf.logger.api.spec.OptionalLogSpec;
+
+
+/**
+ * Concrete model implementation for {@link OptionalLogSpec}
+ *
+ * @author Rajiv Singla
+ */
+@Getter
+@AllArgsConstructor
+@EqualsAndHashCode
+@ToString
+@Wither
+public class OptionalLogSpecImpl implements OptionalLogSpec {
+
+    private static final long serialVersionUID = 1L;
+
+    @Delegate(types = MessageLogInfo.class)
+    private MessageLogInfo messageLogInfo;
+
+    @Delegate(types = CodeLogInfo.class)
+    private CodeLogInfo codeLogInfo;
+
+    @Delegate(types = CustomFieldsLogInfo.class)
+    private CustomFieldsLogInfo customFieldsLogInfo;
+
+    @Delegate(types = MiscLogInfo.class)
+    private MiscLogInfo miscLogInfo;
+}
diff --git a/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/package-info.java b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/package-info.java
new file mode 100644
index 0000000..73aec41
--- /dev/null
+++ b/eelf-logger/eelf-logger-model/src/main/java/org/onap/dcae/utils/eelf/logger/model/spec/package-info.java
@@ -0,0 +1,23 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ */
+
+/**
+ * Contains immutable implementations for EELF Logging specification interfaces
+ */
+package org.onap.dcae.utils.eelf.logger.model.spec;
diff --git a/eelf-logger/findbugs-exclude.xml b/eelf-logger/findbugs-exclude.xml
new file mode 100644
index 0000000..9eac36d
--- /dev/null
+++ b/eelf-logger/findbugs-exclude.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+  ~ ================================================================================
+  ~ Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+  ~ ================================================================================
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~ ============LICENSE_END=========================================================
+  ~
+  -->
+
+<FindBugsFilter>
+
+    <Match>
+        <!-- MODEL OBJECTS ARE USING LOMBOK ANNOTATIONS SO SOME FINDBUGS ARE IGNORED-->
+        <Package name="~.*model.*"/>
+        <Bug pattern="ES_COMPARING_PARAMETER_STRING_WITH_EQ, RC_REF_COMPARISON, EI_EXPOSE_REP, EI_EXPOSE_REP2"/>
+    </Match>
+
+</FindBugsFilter>
diff --git a/eelf-logger/pmd-exclude.properties b/eelf-logger/pmd-exclude.properties
new file mode 100644
index 0000000..d325b88
--- /dev/null
+++ b/eelf-logger/pmd-exclude.properties
@@ -0,0 +1,22 @@
+#

+# ================================================================================

+# Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.

+# ================================================================================

+# Licensed under the Apache License, Version 2.0 (the "License");

+# you may not use this file except in compliance with the License.

+# You may obtain a copy of the License at

+#

+#      http://www.apache.org/licenses/LICENSE-2.0

+#

+# Unless required by applicable law or agreed to in writing, software

+# distributed under the License is distributed on an "AS IS" BASIS,

+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

+# See the License for the specific language governing permissions and

+# limitations under the License.

+# ============LICENSE_END=========================================================

+#

+#

+

+# List fully qualified names of classes that can be excluded for PMD (PROGRAMMING-MISTAKE-DETECTOR)

+

+# IGNORE TOO MANY STATIC IMPORTS

diff --git a/eelf-logger/pom.xml b/eelf-logger/pom.xml
new file mode 100644
index 0000000..acb5fda
--- /dev/null
+++ b/eelf-logger/pom.xml
@@ -0,0 +1,476 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ ================================================================================
+  ~ Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+  ~ ================================================================================
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~ ============LICENSE_END=========================================================
+  ~
+  -->
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xmlns="http://maven.apache.org/POM/4.0.0"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+    <modelVersion>4.0.0</modelVersion>
+    <modules>
+        <module>eelf-logger-api</module>
+        <module>eelf-logger-model</module>
+        <module>eelf-logger-logback-impl</module>
+    </modules>
+
+    <parent>
+        <artifactId>utils</artifactId>
+        <groupId>org.onap.dcaegen2.utils</groupId>
+        <version>1.2.0-SNAPSHOT</version>
+    </parent>
+
+
+    <artifactId>eelf-logger</artifactId>
+    <name>dcaegen2-utils-eelf-logger</name>
+    <version>1.0.0-SNAPSHOT</version>
+    <packaging>pom</packaging>
+    <url>http://maven.apache.org</url>
+
+
+    <properties>
+
+        <!-- PROJECT SETTINGS-->
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <main.basedir>${project.basedir}</main.basedir>
+
+        <!--TEST SETTINGS -->
+        <surefire.redirectTestOutputToFile>true</surefire.redirectTestOutputToFile>
+
+        <!-- PROJECT DEPENDENCIES -->
+        <slf4j.version>1.7.5</slf4j.version>
+        <logback.version>1.2.3</logback.version>
+        <lombok.version>1.16.10</lombok.version>
+
+
+        <!--TESTING DEPENDENCIES -->
+        <junit.version>4.12</junit.version>
+        <mockito.version>2.2.11</mockito.version>
+        <assertj-core.version>2.6.0</assertj-core.version>
+
+
+        <!-- PLUGINS VERSIONS -->
+        <compiler.plugin.version>3.3</compiler.plugin.version>
+        <surefire.plugin.version>2.19.1</surefire.plugin.version>
+        <failsafe.plugin.version>2.19.1</failsafe.plugin.version>
+        <findbugs.plugin.version>3.0.2</findbugs.plugin.version>
+
+        <pmd.plugin.version>3.5</pmd.plugin.version>
+        <javadoc.plugin.version>2.10.4</javadoc.plugin.version>
+        <source.plugin.version>2.4</source.plugin.version>
+        <jar.plugin.version>2.4</jar.plugin.version>
+        <deploy.plugin.version>2.8</deploy.plugin.version>
+        <lombok.plugin.version>1.16.10.0</lombok.plugin.version>
+        <maven.site.plugin>3.5.1</maven.site.plugin>
+
+        <!--PLUGIN SETTINGS -->
+        <compiler.source.version>1.7</compiler.source.version>
+        <compiler.target.version>1.7</compiler.target.version>
+        <unit.test.pattern>**/*Test.java</unit.test.pattern>
+        <skip.unit.tests>false</skip.unit.tests>
+        <integration.test.pattern>**/*IT.java</integration.test.pattern>
+        <skip.integration.tests>true</skip.integration.tests>
+        <pmd.violation.buildfail>true</pmd.violation.buildfail>
+        <findbugs.failOnError>true</findbugs.failOnError>
+
+    </properties>
+
+
+    <dependencyManagement>
+
+        <dependencies>
+
+            <!-- LOGGING -->
+            <dependency>
+                <groupId>org.slf4j</groupId>
+                <artifactId>slf4j-api</artifactId>
+                <version>${slf4j.version}</version>
+            </dependency>
+
+            <dependency>
+                <groupId>ch.qos.logback</groupId>
+                <artifactId>logback-classic</artifactId>
+                <version>${logback.version}</version>
+            </dependency>
+
+            <!-- CODE GENERATION -->
+            <dependency>
+                <groupId>org.projectlombok</groupId>
+                <artifactId>lombok</artifactId>
+                <version>${lombok.version}</version>
+                <scope>provided</scope>
+            </dependency>
+
+
+            <!-- TEST DEPENDENCIES -->
+            <dependency>
+                <groupId>junit</groupId>
+                <artifactId>junit</artifactId>
+                <version>${junit.version}</version>
+                <scope>test</scope>
+            </dependency>
+
+            <dependency>
+                <groupId>org.mockito</groupId>
+                <artifactId>mockito-core</artifactId>
+                <version>${mockito.version}</version>
+                <scope>test</scope>
+            </dependency>
+
+            <dependency>
+                <groupId>org.assertj</groupId>
+                <artifactId>assertj-core</artifactId>
+                <version>${assertj-core.version}</version>
+                <scope>test</scope>
+            </dependency>
+
+        </dependencies>
+
+    </dependencyManagement>
+
+
+    <!-- COMMON DEPENDENCIES FOR ALL SUB-PROJECTS -->
+    <dependencies>
+        <!-- TEST DEPENDENCIES -->
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+        </dependency>
+    </dependencies>
+
+
+    <build>
+
+        <pluginManagement>
+
+            <plugins>
+                <!-- COMPILER PLUGIN -->
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-compiler-plugin</artifactId>
+                    <version>${compiler.plugin.version}</version>
+                    <configuration>
+                        <source>${compiler.target.version}</source>
+                        <target>${compiler.source.version}</target>
+                    </configuration>
+                </plugin>
+
+                <!-- MAVEN SOURCE PLUGIN -->
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-source-plugin</artifactId>
+                    <version>${source.plugin.version}</version>
+                    <configuration>
+                        <excludeResources>true</excludeResources>
+                    </configuration>
+                    <executions>
+                        <execution>
+                            <id>attach-sources</id>
+                            <phase>verify</phase>
+                            <goals>
+                                <goal>jar-no-fork</goal>
+                            </goals>
+                        </execution>
+                    </executions>
+                </plugin>
+
+
+                <!-- MAVEN JAVADOC PLUGIN -->
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-javadoc-plugin</artifactId>
+                    <version>${javadoc.plugin.version}</version>
+                    <configuration>
+                        <!-- minimize console output messages -->
+                        <quiet>true</quiet>
+                        <verbose>false</verbose>
+                        <useStandardDocletOptions>false</useStandardDocletOptions>
+                    </configuration>
+                    <executions>
+                        <execution>
+                            <id>aggregate</id>
+                            <phase>site</phase>
+                            <goals>
+                                <goal>aggregate</goal>
+                            </goals>
+                        </execution>
+                        <execution>
+                            <id>attach-javadoc</id>
+                            <goals>
+                                <goal>jar</goal>
+                            </goals>
+                        </execution>
+                    </executions>
+                </plugin>
+
+
+                <!-- SUREFIRE TEST PLUGIN -->
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-surefire-plugin</artifactId>
+                    <version>${surefire.plugin.version}</version>
+                    <configuration>
+                        <skipTests>${skip.unit.tests}</skipTests>
+                        <argLine>-Xmx2048m -Djava.awt.headless=true -XX:+UseConcMarkSweepGC
+                            -XX:OnOutOfMemoryError="kill -9 %p" -XX:+HeapDumpOnOutOfMemoryError
+                        </argLine>
+                        <redirectTestOutputToFile>${surefire.redirectTestOutputToFile}</redirectTestOutputToFile>
+                        <parallel>methods</parallel>
+                        <threadCount>8</threadCount>
+                        <forkCount>8</forkCount>
+                        <reuseForks>true</reuseForks>
+                        <reportFormat>xml</reportFormat>
+                        <trimStackTrace>false</trimStackTrace>
+                        <systemPropertyVariables>
+                            <java.io.tmpdir>${project.build.directory}</java.io.tmpdir>
+                            <logback.configurationFile>
+                                ${basedir}/src/test/resources/logback-test.xml
+                            </logback.configurationFile>
+                        </systemPropertyVariables>
+                        <includes>
+                            <include>${unit.test.pattern}</include>
+                        </includes>
+                        <excludes>
+                            <exclude>${integration.test.pattern}</exclude>
+                        </excludes>
+                        <!-- Sets the VM argument line used when unit tests are run. -->
+                        <argLine>${surefireArgLine}</argLine>
+                    </configuration>
+                    <dependencies>
+                        <dependency>
+                            <groupId>org.apache.maven.surefire</groupId>
+                            <artifactId>surefire-junit47</artifactId>
+                            <version>${surefire.plugin.version}</version>
+                        </dependency>
+                    </dependencies>
+                </plugin>
+
+                <!-- FAIL SAFE PLUGIN FOR INTEGRATION TEST -->
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-failsafe-plugin</artifactId>
+                    <version>${failsafe.plugin.version}</version>
+                    <executions>
+                        <execution>
+                            <id>integration-tests</id>
+                            <goals>
+                                <goal>integration-test</goal>
+                                <goal>verify</goal>
+                            </goals>
+                            <configuration>
+                                <skipTests>${skip.integration.tests}</skipTests>
+                                <!-- Sets the VM argument line used when integration tests are run. -->
+                                <!--suppress MavenModelInspection -->
+                                <argLine>${failsafeArgLine}</argLine>
+                            </configuration>
+                        </execution>
+                    </executions>
+                </plugin>
+
+
+                <!-- FIND BUGS (STATIC CODE ANALYSIS) PLUGIN -->
+                <plugin>
+                    <groupId>org.codehaus.mojo</groupId>
+                    <artifactId>findbugs-maven-plugin</artifactId>
+                    <version>${findbugs.plugin.version}</version>
+                    <configuration>
+                        <effort>Max</effort>
+                        <threshold>Low</threshold>
+                        <xmlOutput>true</xmlOutput>
+                        <!-- BUILD FAIL ON FINDBUGS ERRORS -->
+                        <failOnError>${findbugs.failOnError}</failOnError>
+                        <excludeFilterFile>${main.basedir}/findbugs-exclude.xml</excludeFilterFile>
+                        <outputDirectory>${project.reporting.outputDirectory}/findbugs</outputDirectory>
+                        <findbugsXmlOutputDirectory>${project.reporting.outputDirectory}/findbugs
+                        </findbugsXmlOutputDirectory>
+                    </configuration>
+                    <executions>
+                        <execution>
+                            <id>analyze-compile</id>
+                            <phase>compile</phase>
+                            <goals>
+                                <goal>check</goal>
+                            </goals>
+                        </execution>
+                    </executions>
+                </plugin>
+
+                <!-- PMD PLUGIN SETUP -->
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-pmd-plugin</artifactId>
+                    <version>${pmd.plugin.version}</version>
+                    <configuration>
+                        <sourceEncoding>${project.build.sourceEncoding}</sourceEncoding>
+                        <targetJdk>${compiler.target.version}</targetJdk>
+                        <linkXRef>false</linkXRef>
+                        <!-- BUILD FAIL ON PMD VIOLATION -->
+                        <failOnViolation>${pmd.violation.buildfail}</failOnViolation>
+                        <targetDirectory>${project.reporting.outputDirectory}/pmd</targetDirectory>
+                        <minimumTokens>200</minimumTokens>
+                    </configuration>
+                    <executions>
+                        <execution>
+                            <id>pmd-check</id>
+                            <goals>
+                                <goal>check</goal>
+                            </goals>
+                            <configuration>
+                                <printFailingErrors>true</printFailingErrors>
+                                <excludeFromFailureFile>${main.basedir}/pmd-exclude.properties</excludeFromFailureFile>
+                            </configuration>
+                        </execution>
+                        <execution>
+                            <id>cpd-check</id>
+                            <goals>
+                                <goal>cpd-check</goal>
+                            </goals>
+                            <configuration>
+                                <printFailingErrors>true</printFailingErrors>
+                                <excludeFromFailureFile>${main.basedir}/cpd-exclude.properties</excludeFromFailureFile>
+                            </configuration>
+                        </execution>
+                    </executions>
+                </plugin>
+
+
+
+
+                <!-- LOMBOK PLUGIN -->
+                <plugin>
+                    <groupId>org.projectlombok</groupId>
+                    <artifactId>lombok-maven-plugin</artifactId>
+                    <version>${lombok.plugin.version}</version>
+                    <executions>
+                        <execution>
+                            <id>delombok</id>
+                            <phase>generate-sources</phase>
+                            <goals>
+                                <goal>delombok</goal>
+                            </goals>
+                            <configuration>
+                                <addOutputDirectory>false</addOutputDirectory>
+                                <sourceDirectory>src/main/java</sourceDirectory>
+                            </configuration>
+                        </execution>
+                    </executions>
+                </plugin>
+
+                <!-- JAR PLUGIN -->
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-jar-plugin</artifactId>
+                    <version>${jar.plugin.version}</version>
+                    <configuration>
+                        <archive>
+                            <manifest>
+                                <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
+                            </manifest>
+                            <manifestEntries>
+                                <Implementation-Build-Version>${project.version}</Implementation-Build-Version>
+                            </manifestEntries>
+                        </archive>
+                    </configuration>
+                </plugin>
+
+                <!-- DEPLOY PLUGIN -->
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-deploy-plugin</artifactId>
+                    <version>${deploy.plugin.version}</version>
+                    <configuration>
+                        <deployAtEnd>true</deployAtEnd>
+                    </configuration>
+                </plugin>
+
+            </plugins>
+
+        </pluginManagement>
+
+        <plugins>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-failsafe-plugin</artifactId>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-deploy-plugin</artifactId>
+            </plugin>
+
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-source-plugin</artifactId>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-pmd-plugin</artifactId>
+            </plugin>
+
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>findbugs-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+
+    </build>
+
+    <profiles>
+        <profile>
+            <id>disable-java8-doclint</id>
+            <activation>
+                <jdk>[1.8,)</jdk>
+            </activation>
+            <properties>
+                <additionalparam>-Xdoclint:none</additionalparam>
+            </properties>
+        </profile>
+    </profiles>
+
+</project>
diff --git a/eelf-logger/version.properties b/eelf-logger/version.properties
new file mode 100644
index 0000000..907cdc4
--- /dev/null
+++ b/eelf-logger/version.properties
@@ -0,0 +1,25 @@
+#
+# ================================================================================
+# Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
+# ================================================================================
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ============LICENSE_END=========================================================
+#
+#
+
+major=1
+minor=0
+patch=0
+base_version=${major}.${minor}.${patch}
+release_version=${base_version}
+snapshot_version=${base_version}-SNAPSHOT