Adding plugins-event module to apex-pdp

Adding plugins-event module to apex-pdp
Fix a minor bug in TextFileUtils

Change-Id: I393c5f5809d078850d6669d22759ba9fa1b4f0e6
Issue-ID: POLICY-862
Signed-off-by: ramverma <ram.krishna.verma@ericsson.com>

5 files changed, 635 insertions, 0 deletions

diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/pom.xml b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/pom.xml
new file mode 100644
index 000000000..8be1131e6
--- /dev/null
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/pom.xml
@@ -0,0 +1,49 @@
+<!--
+  ============LICENSE_START=======================================================
+   Copyright (C) 2018 Ericsson. 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.
+
+  SPDX-License-Identifier: Apache-2.0
+  ============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.policy.apex-pdp.plugins.plugins-event.plugins-event-carrier</groupId>
+        <artifactId>plugins-event-carrier</artifactId>
+        <version>2.0.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>plugins-event-carrier-restclient</artifactId>
+    <name>${project.artifactId}</name>
+    <description>[${project.parent.artifactId}] Plugin for handling events being transported over REST where Apex acts as a REST client</description>
+
+    <properties>
+        <apex-plugins-event-carrier-restclient-dir>${project.basedir}/src</apex-plugins-event-carrier-restclient-dir>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.glassfish.jersey.core</groupId>
+            <artifactId>jersey-client</artifactId>
+            <version>${version.jersey.core}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.onap.policy.apex-pdp.services</groupId>
+            <artifactId>services-engine</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+    </dependencies>
+</project>
\ No newline at end of file
diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientConsumer.java b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientConsumer.java
new file mode 100644
index 000000000..b9348d494
--- /dev/null
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientConsumer.java
@@ -0,0 +1,233 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2016-2018 Ericsson. 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.plugins.event.carrier.restclient;
+
+import java.util.EnumMap;
+import java.util.Map;
+
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.ClientBuilder;
+import javax.ws.rs.core.Response;
+
+import org.onap.policy.apex.core.infrastructure.threading.ApplicationThreadFactory;
+import org.onap.policy.apex.core.infrastructure.threading.ThreadUtilities;
+import org.onap.policy.apex.service.engine.event.ApexEventConsumer;
+import org.onap.policy.apex.service.engine.event.ApexEventException;
+import org.onap.policy.apex.service.engine.event.ApexEventReceiver;
+import org.onap.policy.apex.service.engine.event.ApexEventRuntimeException;
+import org.onap.policy.apex.service.engine.event.PeeredReference;
+import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters;
+import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerPeeredMode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This class implements an Apex event consumer that receives events from a REST server.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class ApexRestClientConsumer implements ApexEventConsumer, Runnable {
+    // Get a reference to the logger
+    private static final Logger LOGGER = LoggerFactory.getLogger(ApexRestClientConsumer.class);
+
+    // The amount of time to wait in milliseconds between checks that the consumer thread has stopped
+    private static final long REST_CLIENT_WAIT_SLEEP_TIME = 50;
+
+    // The REST parameters read from the parameter service
+    private RESTClientCarrierTechnologyParameters restConsumerProperties;
+
+    // The event receiver that will receive events from this consumer
+    private ApexEventReceiver eventReceiver;
+
+    // The HTTP client that makes a REST call to get an input event for Apex
+    private Client client;
+
+    // The name for this consumer
+    private String name = null;
+
+    // The peer references for this event handler
+    private Map<EventHandlerPeeredMode, PeeredReference> peerReferenceMap = new EnumMap<>(EventHandlerPeeredMode.class);
+
+    // The consumer thread and stopping flag
+    private Thread consumerThread;
+    private boolean stopOrderedFlag = false;
+
+    @Override
+    public void init(final String consumerName, final EventHandlerParameters consumerParameters,
+            final ApexEventReceiver incomingEventReceiver) throws ApexEventException {
+        this.eventReceiver = incomingEventReceiver;
+        this.name = consumerName;
+
+        // Check and get the REST Properties
+        if (!(consumerParameters.getCarrierTechnologyParameters() instanceof RESTClientCarrierTechnologyParameters)) {
+            final String errorMessage =
+                    "specified consumer properties are not applicable to REST client consumer (" + this.name + ")";
+            LOGGER.warn(errorMessage);
+            throw new ApexEventException(errorMessage);
+        }
+        restConsumerProperties =
+                (RESTClientCarrierTechnologyParameters) consumerParameters.getCarrierTechnologyParameters();
+
+        // Check if the HTTP method has been set
+        if (restConsumerProperties.getHttpMethod() == null) {
+            restConsumerProperties.setHttpMethod(RESTClientCarrierTechnologyParameters.CONSUMER_HTTP_METHOD);
+        }
+
+        if (!restConsumerProperties.getHttpMethod()
+                .equalsIgnoreCase(RESTClientCarrierTechnologyParameters.CONSUMER_HTTP_METHOD)) {
+            final String errorMessage = "specified HTTP method of \"" + restConsumerProperties.getHttpMethod()
+                    + "\" is invalid, only HTTP method \"GET\" is supported for event reception on REST client consumer ("
+                    + this.name + ")";
+            LOGGER.warn(errorMessage);
+            throw new ApexEventException(errorMessage);
+        }
+
+        // Initialize the HTTP client
+        client = ClientBuilder.newClient();
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.service.engine.event.ApexEventConsumer#start()
+     */
+    @Override
+    public void start() {
+        // Configure and start the event reception thread
+        final String threadName = this.getClass().getName() + ":" + this.name;
+        consumerThread = new ApplicationThreadFactory(threadName).newThread(this);
+        consumerThread.setDaemon(true);
+        consumerThread.start();
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.service.engine.event.ApexEventConsumer#getName()
+     */
+    @Override
+    public String getName() {
+        return name;
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.service.engine.event.ApexEventConsumer#getPeeredReference(org.onap.policy.apex.service.
+     * parameters. eventhandler.EventHandlerPeeredMode)
+     */
+    @Override
+    public PeeredReference getPeeredReference(final EventHandlerPeeredMode peeredMode) {
+        return peerReferenceMap.get(peeredMode);
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.service.engine.event.ApexEventConsumer#setPeeredReference(org.onap.policy.apex.service.
+     * parameters. eventhandler.EventHandlerPeeredMode, org.onap.policy.apex.service.engine.event.PeeredReference)
+     */
+    @Override
+    public void setPeeredReference(final EventHandlerPeeredMode peeredMode, final PeeredReference peeredReference) {
+        peerReferenceMap.put(peeredMode, peeredReference);
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see java.lang.Runnable#run()
+     */
+    @Override
+    public void run() {
+        // The RequestRunner thread runs the get request for the event
+        Thread requestRunnerThread = null;
+
+        // The endless loop that receives events using REST calls
+        while (consumerThread.isAlive() && !stopOrderedFlag) {
+            // Create a new request if one is not in progress
+            if (requestRunnerThread == null || !requestRunnerThread.isAlive()) {
+                requestRunnerThread = new Thread(new RequestRunner());
+                requestRunnerThread.start();
+            }
+
+            ThreadUtilities.sleep(REST_CLIENT_WAIT_SLEEP_TIME);
+        }
+
+        client.close();
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.apps.uservice.producer.ApexEventConsumer#stop()
+     */
+    @Override
+    public void stop() {
+        stopOrderedFlag = true;
+
+        while (consumerThread.isAlive()) {
+            ThreadUtilities.sleep(REST_CLIENT_WAIT_SLEEP_TIME);
+        }
+    }
+
+    /**
+     * This class is used to start a thread for each request issued.
+     *
+     * @author Liam Fallon (liam.fallon@ericsson.com)
+     */
+    private class RequestRunner implements Runnable {
+        /*
+         * (non-Javadoc)
+         *
+         * @see java.lang.Runnable#run()
+         */
+        @Override
+        public void run() {
+            try {
+                final Response response =
+                        client.target(restConsumerProperties.getURL()).request("application/json").get();
+
+                // Check that the event request worked
+                if (response.getStatus() != Response.Status.OK.getStatusCode()) {
+                    final String errorMessage = "reception of event from URL \"" + restConsumerProperties.getURL()
+                            + "\" failed with status code " + response.getStatus() + " and message \""
+                            + response.readEntity(String.class) + "\"";
+                    throw new ApexEventRuntimeException(errorMessage);
+                }
+
+                // Get the event we received
+                final String eventJSONString = response.readEntity(String.class);
+
+                // Check there is content
+                if (eventJSONString == null || eventJSONString.trim().length() == 0) {
+                    final String errorMessage =
+                            "received an empty event from URL \"" + restConsumerProperties.getURL() + "\"";
+                    throw new ApexEventRuntimeException(errorMessage);
+                }
+
+                // Send the event into Apex
+                eventReceiver.receiveEvent(eventJSONString);
+            } catch (final Exception e) {
+                LOGGER.warn("error receiving events on thread {}", consumerThread.getName(), e);
+            }
+        }
+    }
+}
diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientProducer.java b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientProducer.java
new file mode 100644
index 000000000..9d838f55e
--- /dev/null
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientProducer.java
@@ -0,0 +1,191 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2016-2018 Ericsson. 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.plugins.event.carrier.restclient;
+
+import java.util.EnumMap;
+import java.util.Map;
+
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.ClientBuilder;
+import javax.ws.rs.client.Entity;
+import javax.ws.rs.core.Response;
+
+import org.onap.policy.apex.service.engine.event.ApexEventException;
+import org.onap.policy.apex.service.engine.event.ApexEventProducer;
+import org.onap.policy.apex.service.engine.event.ApexEventRuntimeException;
+import org.onap.policy.apex.service.engine.event.PeeredReference;
+import org.onap.policy.apex.service.engine.event.SynchronousEventCache;
+import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters;
+import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerPeeredMode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Concrete implementation of an Apex event producer that sends events using REST.
+ *
+ * @author Joss Armstrong (joss.armstrong@ericsson.com)
+ *
+ */
+public class ApexRestClientProducer implements ApexEventProducer {
+    private static final Logger LOGGER = LoggerFactory.getLogger(ApexRestClientProducer.class);
+
+    // The HTTP client that makes a REST call with an event from Apex
+    private Client client;
+
+    // The REST carrier properties
+    private RESTClientCarrierTechnologyParameters restProducerProperties;
+
+    // The name for this producer
+    private String name = null;
+
+    // The peer references for this event handler
+    private Map<EventHandlerPeeredMode, PeeredReference> peerReferenceMap = new EnumMap<>(EventHandlerPeeredMode.class);
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#init(java.lang.String,
+     * org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters)
+     */
+    @Override
+    public void init(final String producerName, final EventHandlerParameters producerParameters)
+            throws ApexEventException {
+        this.name = producerName;
+
+        // Check and get the REST Properties
+        if (!(producerParameters.getCarrierTechnologyParameters() instanceof RESTClientCarrierTechnologyParameters)) {
+            final String errorMessage =
+                    "specified consumer properties are not applicable to REST client producer (" + this.name + ")";
+            LOGGER.warn(errorMessage);
+            throw new ApexEventException(errorMessage);
+        }
+        restProducerProperties =
+                (RESTClientCarrierTechnologyParameters) producerParameters.getCarrierTechnologyParameters();
+
+        // Check if the HTTP method has been set
+        if (restProducerProperties.getHttpMethod() == null) {
+            restProducerProperties.setHttpMethod(RESTClientCarrierTechnologyParameters.DEFAULT_PRODUCER_HTTP_METHOD);
+        }
+
+        if (!restProducerProperties.getHttpMethod().equalsIgnoreCase("POST")
+                && !restProducerProperties.getHttpMethod().equalsIgnoreCase("PUT")) {
+            final String errorMessage = "specified HTTP method of \"" + restProducerProperties.getHttpMethod()
+                    + "\" is invalid, only HTTP methods \"POST\" and \"PUT\" are supproted for event sending on REST client producer ("
+                    + this.name + ")";
+            LOGGER.warn(errorMessage);
+            throw new ApexEventException(errorMessage);
+        }
+
+        // Initialize the HTTP client
+        client = ClientBuilder.newClient();
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#getName()
+     */
+    @Override
+    public String getName() {
+        return name;
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#getPeeredReference(org.onap.policy.apex.service.
+     * parameters. eventhandler.EventHandlerPeeredMode)
+     */
+    @Override
+    public PeeredReference getPeeredReference(final EventHandlerPeeredMode peeredMode) {
+        return peerReferenceMap.get(peeredMode);
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#setPeeredReference(org.onap.policy.apex.service.
+     * parameters. eventhandler.EventHandlerPeeredMode, org.onap.policy.apex.service.engine.event.PeeredReference)
+     */
+    @Override
+    public void setPeeredReference(final EventHandlerPeeredMode peeredMode, final PeeredReference peeredReference) {
+        peerReferenceMap.put(peeredMode, peeredReference);
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#sendEvent(long, java.lang. String,
+     * java.lang.Object)
+     */
+    @Override
+    public void sendEvent(final long executionId, final String eventName, final Object event) {
+        // Check if this is a synchronized event, if so we have received a reply
+        final SynchronousEventCache synchronousEventCache =
+                (SynchronousEventCache) peerReferenceMap.get(EventHandlerPeeredMode.SYNCHRONOUS);
+        if (synchronousEventCache != null) {
+            synchronousEventCache.removeCachedEventToApexIfExists(executionId);
+        }
+
+        // Send the event as a REST request
+        final Response response = sendEventAsRESTRequest((String) event);
+
+        // Check that the request worked
+        if (response.getStatus() != Response.Status.OK.getStatusCode()) {
+            final String errorMessage = "send of event to URL \"" + restProducerProperties.getURL() + "\" using HTTP \""
+                    + restProducerProperties.getHttpMethod() + "\" failed with status code " + response.getStatus()
+                    + " and message \"" + response.readEntity(String.class) + "\", event:\n" + event;
+            LOGGER.warn(errorMessage);
+            throw new ApexEventRuntimeException(errorMessage);
+        }
+
+        if (LOGGER.isTraceEnabled()) {
+            LOGGER.trace("event sent from engine using {} to URL {} with HTTP {} : {} and response {} ", this.name,
+                    restProducerProperties.getURL(), restProducerProperties.getHttpMethod(), event, response);
+        }
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#stop()
+     */
+    @Override
+    public void stop() {
+        // Close the HTTP session
+        client.close();
+    }
+
+    /**
+     * Send the event as a JSON string as a REST request.
+     *
+     * @param event the event to send
+     * @return the response tot he JSON request
+     */
+    public Response sendEventAsRESTRequest(final String event) {
+        // We have already checked that it is a PUT or POST request
+        if (restProducerProperties.getHttpMethod().equalsIgnoreCase("POST")) {
+            return client.target(restProducerProperties.getURL()).request("application/json").post(Entity.json(event));
+        } else {
+            return client.target(restProducerProperties.getURL()).request("application/json").put(Entity.json(event));
+        }
+    }
+}
diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/RESTClientCarrierTechnologyParameters.java b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/RESTClientCarrierTechnologyParameters.java
new file mode 100644
index 000000000..e07593c55
--- /dev/null
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/RESTClientCarrierTechnologyParameters.java
@@ -0,0 +1,134 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2016-2018 Ericsson. 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.plugins.event.carrier.restclient;
+
+import org.onap.policy.apex.service.parameters.carriertechnology.CarrierTechnologyParameters;
+
+/**
+ * Apex parameters for REST as an event carrier technology with Apex as a REST client.
+ *
+ * The parameters for this plugin are:
+ * <ol>
+ * <li>url: The URL that the Apex Rest client will connect to over REST for event reception or event sending. This
+ * parameter is mandatory.
+ * <li>httpMethod: The HTTP method to use when sending events over REST, legal values are POST (default) and PUT. When
+ * receiving events, the REST client plugin always uses the HTTP GET method.
+ * </ol>
+ *
+ * @author Joss Armstrong (joss.armstrong@ericsson.com)
+ */
+public class RESTClientCarrierTechnologyParameters extends CarrierTechnologyParameters {
+
+    /** The label of this carrier technology. */
+    public static final String RESTCLIENT_CARRIER_TECHNOLOGY_LABEL = "RESTCLIENT";
+
+    /** The producer plugin class for the REST carrier technology. */
+    public static final String RESTCLIENT_EVENT_PRODUCER_PLUGIN_CLASS = ApexRestClientProducer.class.getCanonicalName();
+
+    /** The consumer plugin class for the REST carrier technology. */
+    public static final String RESTCLIENT_EVENT_CONSUMER_PLUGIN_CLASS = ApexRestClientConsumer.class.getCanonicalName();
+
+    /** The default HTTP method for output of events. */
+    public static final String DEFAULT_PRODUCER_HTTP_METHOD = "POST";
+
+    /** The HTTP method for input of events. */
+    public static final String CONSUMER_HTTP_METHOD = "GET";
+
+    private String url = null;
+    private String httpMethod = null;
+
+    /**
+     * Constructor to create a REST carrier technology parameters instance and register the instance with the parameter
+     * service.
+     */
+    public RESTClientCarrierTechnologyParameters() {
+        super(RESTClientCarrierTechnologyParameters.class.getCanonicalName());
+
+        // Set the carrier technology properties for the web socket carrier technology
+        this.setLabel(RESTCLIENT_CARRIER_TECHNOLOGY_LABEL);
+        this.setEventProducerPluginClass(RESTCLIENT_EVENT_PRODUCER_PLUGIN_CLASS);
+        this.setEventConsumerPluginClass(RESTCLIENT_EVENT_CONSUMER_PLUGIN_CLASS);
+
+    }
+
+    /**
+     * Gets the URL for the REST request.
+     *
+     * @return the URL
+     */
+    public String getURL() {
+        return url;
+    }
+
+    /**
+     * Sets the URL for the REST request.
+     *
+     * @param incomingURL the URL
+     */
+    public void setURL(final String incomingURL) {
+        this.url = incomingURL;
+    }
+
+    /**
+     * Gets the HTTP method to use for the REST request.
+     *
+     * @return the HTTP method
+     */
+    public String getHttpMethod() {
+        return httpMethod;
+    }
+
+    /**
+     * Sets the HTTP method to use for the REST request.
+     *
+     * @param httpMethod the HTTP method
+     */
+    public void setHttpMethod(final String httpMethod) {
+        this.httpMethod = httpMethod;
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see java.lang.Object#toString()
+     */
+    @Override
+    public String toString() {
+        return "RESTClientCarrierTechnologyParameters [url=" + url + ", httpMethod=" + httpMethod + "]";
+    }
+
+
+    /*
+     *
+     * @see org.onap.policy.apex.apps.uservice.parameters.ApexParameterValidator#validate()
+     */
+    @Override
+    public String validate() {
+        final StringBuilder errorMessageBuilder = new StringBuilder();
+
+        // Check if the URL has been set for event output
+        if (getURL() == null) {
+            errorMessageBuilder.append("  no URL has been set for event sending on REST client");
+        }
+
+        return errorMessageBuilder.toString();
+    }
+}
diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/package-info.java b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/package-info.java
new file mode 100644
index 000000000..e674beef6
--- /dev/null
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/package-info.java
@@ -0,0 +1,28 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2016-2018 Ericsson. 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * APEX REST consumer and producer plugins when APEX is acting as a REST client.
+ *
+ * @author Joss Armstrong (joss.armstrong@ericsson.com)
+ *
+ */
+
+package org.onap.policy.apex.plugins.event.carrier.restclient;