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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.core.logging.aspects;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.openecomp.core.logging.api.Logger;
import org.openecomp.core.logging.api.LoggerFactory;
import org.openecomp.core.logging.api.annotations.Metrics;
/**
* <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>
*
* @see Metrics
*/
@Aspect
public class MetricsAspect {
private static final String MESSAGE_TEMPLATE = "'{}' took {} milliseconds";
/**
* Log execution time object.
*
* @param pjp the pjp
* @return the object
* @throws Throwable the throwable
*/
@Around("@annotation(org.openecomp.core.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.isMetricsEnabled()) {
final String method = pjp.getSignature().getName();
final long start = System.currentTimeMillis();
try {
return pjp.proceed();
} finally {
logger.metrics(MESSAGE_TEMPLATE, method, System.currentTimeMillis() - start);
}
} else {
return pjp.proceed();
}
}
}
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