Initial commit for EELF Logger

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

1 files changed, 59 insertions, 0 deletions

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;
+    }
+}