1 files changed, 179 insertions, 0 deletions
diff --git a/eelf-logging/src/main/java/org/onap/aai/cl/eelf/LoggerFactory.java b/eelf-logging/src/main/java/org/onap/aai/cl/eelf/LoggerFactory.java
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index 0000000..26a8e4e
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+++ b/eelf-logging/src/main/java/org/onap/aai/cl/eelf/LoggerFactory.java
@@ -0,0 +1,179 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ * Copyright © 2017 Amdocs
+ * ================================================================================
+ * 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=========================================================
+ *
+ * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ */
+package org.onap.aai.cl.eelf;
+
+import com.att.eelf.configuration.EELFManager;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.onap.aai.cl.api.Logger;
+import org.onap.aai.cl.api.LoggerFactoryInterface;
+import org.onap.aai.cl.api.LogLine.LogLineType;
+
+/** This is an implementation of the {@link LoggerFactoryInterface} which
+ * constructs a {@link Logger} implementation which is compatible with the EELF
+ * framework. */
+public class LoggerFactory implements LoggerFactoryInterface {
+
+  /** The instance for our factory singleton. */
+  private static LoggerFactory instance;
+
+  /** An instance of the log factory provided by the EELF framework. We will use
+   * this to get an actual EELF logger instance that we will wrap within our
+   * own, more generalized logger. */
+  private EELFManager eelfManager;
+
+  /** This cache maintains a mapping of logger names to instances so that if a
+   * logger with the same name is requested multiple times we can return the
+   * same instance each time. */
+  private Map<String, Logger> errorLoggerCache = new HashMap<String, Logger>();
+
+  /** This cache maintains a mapping of metric logger names to instances so that
+   * if a logger with the same name is requested multiple times we can return
+   * the same instance each time. */
+  private Map<String, Logger> metricLoggerCache = new HashMap<String, Logger>();
+
+  /** This cache maintains a mapping of audit logger names to instances so that
+   * if a logger with the same name is requested multiple times we can return
+   * the same instance each time. */
+  private Map<String, Logger> auditLoggerCache = new HashMap<String, Logger>();
+
+  /** Returns the single instance of our factory singleton.
+   * 
+   * @return - An instance of the {@link LoggerFactory} */
+  public static synchronized LoggerFactory getInstance() {
+
+    // If we don't already have an instance then create it now.
+    if (instance == null) {
+      instance = new LoggerFactory();
+    }
+
+    // Return our singleton instance.
+    return instance;
+  }
+
+  /** 
+   * Instantiates a new {@link LoggerFactory}. 
+   */
+  protected LoggerFactory() {
+
+    // We need an instance of the factory provided by the EELF
+    // framework so that we can instantiate the EELF logger that
+    // we will be wrapping, so get one now.
+    if (eelfManager == null) {
+      eelfManager = EELFManager.getInstance();
+    }
+  }
+
+  /**
+   * (non-Javadoc)
+   * 
+   * @see org.ecomp.cl.api.LoggerFactoryInterface#getLogger(java.lang.String)
+   */
+  public Logger getLogger(String name) {
+
+    // Check the cache to see if we have already instantiated a logger
+    // with the supplied name.
+    if (!errorLoggerCache.containsKey(name)) {
+
+      // Nothing in the cache, so let's instantiate a logger now.
+      Logger logger = new AaiLoggerAdapter(eelfManager.getLogger(name), LogLineType.ERROR, name);
+      errorLoggerCache.put(name, logger);
+    }
+
+    // Return the requested logger instance.
+    return errorLoggerCache.get(name);
+  }
+
+  /** 
+   * (non-Javadoc)
+   * 
+   * @see org.ecomp.cl.api.LoggerFactoryInterface#getLogger(java.lang.Class)
+   */
+  public Logger getLogger(Class<?> clazz) {
+
+    return getLogger(clazz.getName());
+  }
+
+  /** 
+   * (non-Javadoc)
+   * 
+   * @see org.ecomp.cl.api.LoggerFactoryInterface#getAuditLogger(java.lang.String)
+   */
+  public Logger getAuditLogger(String name) {
+
+    // Check the cache to see if we have already instantiated a logger
+    // with the supplied name.
+    if (!auditLoggerCache.containsKey(name)) {
+
+      // Nothing in the cache, so let's instantiate a logger now.
+      Logger logger = new AaiLoggerAdapter(eelfManager.getAuditLogger(), LogLineType.AUDIT, name);
+      auditLoggerCache.put(name, logger);
+    }
+
+    // Return the requested logger instance.
+    return auditLoggerCache.get(name);
+  }
+
+  /** 
+   * (non-Javadoc)
+   * 
+   * @see org.ecomp.cl.api.LoggerFactoryInterface#getAuditLogger(java.lang.Class)
+   */
+  public Logger getAuditLogger(Class<?> clazz) {
+
+    return getAuditLogger(clazz.getName());
+  }
+
+  /** 
+   * (non-Javadoc)
+   * 
+   * @see org.ecomp.cl.api.LoggerFactoryInterface#getMetricsLogger(java.lang.String)
+   */
+  public Logger getMetricsLogger(String name) {
+
+    // Check the cache to see if we have already instantiated a logger
+    // with the supplied name.
+    if (!metricLoggerCache.containsKey(name)) {
+
+      // Nothing in the cache, so let's instantiate a logger now.
+      Logger logger = new AaiLoggerAdapter(eelfManager.getMetricsLogger(), LogLineType.METRICS,
+          name);
+      metricLoggerCache.put(name, logger);
+    }
+
+    // Return the requested logger instance.
+    return metricLoggerCache.get(name);
+  }
+
+  /** 
+   * (non-Javadoc)
+   * 
+   * @see org.ecomp.cl.api.LoggerFactoryInterface#getMetricsLogger(java.lang.Class)
+   */
+  public Logger getMetricsLogger(Class<?> clazz) {
+
+    return getMetricsLogger(clazz.getName());
+  }
+}