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/*-
* ============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();
}
}
}
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