1 files changed, 70 insertions, 0 deletions
diff --git a/openecomp-be/lib/openecomp-logging-lib/openecomp-sdc-logging-core/src/main/java/org/openecomp/sdc/logging/aspects/MetricsAspect.java b/openecomp-be/lib/openecomp-logging-lib/openecomp-sdc-logging-core/src/main/java/org/openecomp/sdc/logging/aspects/MetricsAspect.java
new file mode 100644
index 0000000000..782362b912
--- /dev/null
+++ b/openecomp-be/lib/openecomp-logging-lib/openecomp-sdc-logging-core/src/main/java/org/openecomp/sdc/logging/aspects/MetricsAspect.java
@@ -0,0 +1,70 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * SDC
+ * ================================================================================
+ * 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.sdc.logging.aspects;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.aspectj.lang.ProceedingJoinPoint;
+import org.aspectj.lang.annotation.Around;
+import org.aspectj.lang.annotation.Aspect;
+import org.slf4j.Marker;
+import org.slf4j.MarkerFactory;
+
+/**
+ * <p>Wraps around any method annotated with {@link Metrics} to measure and log its execution time
+ * in milliseconds.</p>
+ * <p>In order for the aspect to be used, AspectJ annotation processing must be tuned on and this
+ * particular aspect enabled. Conversely, it can be disabled completely if the application does not
+ * need to log metrics.</p>
+ * <p>See, for example, <a href="http://docs.spring.io/spring/docs/current/spring-framework-reference/html/aop.html">
+ * Aspect Oriented Programming with Spring</a>.</p>
+ *
+ * @author evitaliy
+ * @see Metrics
+ * @since 27/07/2016.
+ */
+@Aspect
+public class MetricsAspect {
+
+  private static final String MESSAGE_TEMPLATE = "'{}' took {} milliseconds";
+  private static final Marker METRICS = MarkerFactory.getMarker("METRICS");
+
+  @Around("@annotation(org.openecomp.sdc.logging.api.annotations.Metrics)")
+  public Object logExecutionTime(ProceedingJoinPoint pjp) throws Throwable {
+
+    final Logger logger = LoggerFactory.getLogger(pjp.getSignature().getDeclaringTypeName());
+    // measure and log only if the logger for this class is enabled
+    if (logger.isInfoEnabled()) {
+
+      final String method = pjp.getSignature().getName();
+      final long start = System.currentTimeMillis();
+
+      try {
+        return pjp.proceed();
+      } finally {
+        logger.info(METRICS, MESSAGE_TEMPLATE, method, System.currentTimeMillis() - start);
+      }
+
+    } else {
+      return pjp.proceed();
+    }
+  }
+}