[POLICY-30] optional loadable eelf feature

for backwards compatibility purposes or if desired to
use EELF and common-framework (from policy-common) for
logging purposes in miscellaneous environments.   It supports
EELF/Common Framework style logging at the same time than
traditional logging.

This functionality is an optional loadable module.

policy-docker changes need to be made to optionally
unpack to make it active (in a different submission).

started marking feature projects with feature prefix in
project name to give a clear picture to the community which
modules are features vs. code base.

Change-Id: I5076c462409f03415ce54f0c9b5f50b78abb18f9
Signed-off-by: Jorge Hernandez <jh1730@att.com>

1 files changed, 138 insertions, 0 deletions

diff --git a/feature-eelf/src/test/java/org/openecomp/policy/drools/eelf/test/EElfTest.java b/feature-eelf/src/test/java/org/openecomp/policy/drools/eelf/test/EElfTest.java
new file mode 100644
index 00000000..2ded0d0d
--- /dev/null
+++ b/feature-eelf/src/test/java/org/openecomp/policy/drools/eelf/test/EElfTest.java
@@ -0,0 +1,138 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * feature-eelf
+ * ================================================================================
+ * Copyright (C) 2017 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.openecomp.policy.drools.eelf.test;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.junit.Test;
+import org.openecomp.policy.common.logging.flexlogger.FlexLogger;
+import org.openecomp.policy.drools.eelf.EelfFeature;
+import org.openecomp.policy.drools.system.Main;
+import org.openecomp.policy.drools.system.PolicyEngine;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.att.eelf.configuration.Configuration;
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFLogger.Level;
+import com.att.eelf.configuration.EELFManager;
+
+import ch.qos.logback.classic.LoggerContext;
+
+/**
+ * Logger Tests
+ */
+public class EElfTest {
+	
+	/**
+	 * logback configuration location
+	 */
+	public final static String LOGBACK_CONFIGURATION_FILE_DEFAULT = "src/main/install/config/logback.xml";
+	
+	/**
+	 * SLF4J Logger
+	 */
+	private final Logger slf4jLogger = LoggerFactory.getLogger(EElfTest.class);
+	
+	/**
+	 * get all loggers
+	 * @return list of all loggers
+	 */
+	protected List<String> loggers() {
+		List<String> loggers = new ArrayList<String>();
+		LoggerContext context = 
+    			(LoggerContext) org.slf4j.LoggerFactory.getILoggerFactory();
+    	for (org.slf4j.Logger logger: context.getLoggerList()) {
+    		loggers.add(logger.getName());
+    	}
+    	slf4jLogger.info(loggers.toString());
+		return loggers;
+	}
+	
+	/**
+	 * Assert Log Levels are the same between an EELF Logger and an SLF4J Logger
+	 * 
+	 * @param eelfAuditLogger
+	 * @param slf4jAuditLogger
+	 */
+	protected void assertLogLevels(EELFLogger eelfAuditLogger, Logger slf4jAuditLogger) {
+		assertTrue(slf4jAuditLogger.isDebugEnabled() == eelfAuditLogger.isDebugEnabled());
+		assertTrue(slf4jAuditLogger.isInfoEnabled() == eelfAuditLogger.isInfoEnabled());
+		assertTrue(slf4jAuditLogger.isErrorEnabled() == eelfAuditLogger.isErrorEnabled());
+		assertTrue(slf4jAuditLogger.isWarnEnabled() == eelfAuditLogger.isWarnEnabled());
+		assertTrue(slf4jAuditLogger.isTraceEnabled() == eelfAuditLogger.isTraceEnabled());
+	}
+	
+	@Test
+	public void slf4jLog() {
+		
+		/* standard slf4j using defaults */
+		
+		slf4jLogger.info("slf4j info");
+		
+		List<String> loggers = loggers();  	
+    	
+		assertFalse(loggers.contains(Configuration.DEBUG_LOGGER_NAME));
+		assertFalse(loggers.contains(Configuration.AUDIT_LOGGER_NAME));
+		assertFalse(loggers.contains(Configuration.ERROR_LOGGER_NAME));
+		assertFalse(loggers.contains(Configuration.METRICS_LOGGER_NAME));
+		
+		/* set logback configuration */
+		
+    	System.setProperty(Main.LOGBACK_CONFIGURATION_FILE_SYSTEM_PROPERTY, 
+                           LOGBACK_CONFIGURATION_FILE_DEFAULT);
+    	
+    	/* set up eelf throuth common loggings library */
+    	
+		EelfFeature feature = new EelfFeature();
+		feature.beforeBoot(PolicyEngine.manager, null);
+		
+		loggers = loggers();
+		assertTrue(loggers.contains(Configuration.DEBUG_LOGGER_NAME));
+		assertTrue(loggers.contains(Configuration.AUDIT_LOGGER_NAME));
+		assertTrue(loggers.contains(Configuration.ERROR_LOGGER_NAME));
+		assertTrue(loggers.contains(Configuration.METRICS_LOGGER_NAME));
+		
+		EELFLogger eelfAuditLogger = EELFManager.getInstance().getAuditLogger();
+		Logger slf4jAuditLogger = org.slf4j.LoggerFactory.getLogger(Configuration.AUDIT_LOGGER_NAME);
+		org.openecomp.policy.common.logging.flexlogger.Logger flexLogger = 
+												FlexLogger.getLogger(EElfTest.class);
+		
+		/* generate an audit entry through both logs */
+		
+		flexLogger.audit("flexlogger audit");
+		eelfAuditLogger.info("eelf audit");
+		slf4jAuditLogger.info("slf4j audit");
+
+		/* check log levels in eelf and standard slf4j  change in both directions */
+		
+		/* eelf initiated */
+		eelfAuditLogger.setLevel(Level.ERROR);		
+		assertLogLevels(eelfAuditLogger, slf4jAuditLogger);
+		
+		/* slf4j initiated */
+		((ch.qos.logback.classic.Logger) slf4jLogger).setLevel((ch.qos.logback.classic.Level.INFO));		
+		assertLogLevels(eelfAuditLogger, slf4jAuditLogger);
+	}
+}