org.springframework.aop.interceptor.PerformanceMonitorInterceptor.java Source code

Introduction

Here is the source code for org.springframework.aop.interceptor.PerformanceMonitorInterceptor.java

Source

/*
 * Copyright 2002-2017 the original author or authors.
 *
 * 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
 *
 *      https://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.
 */

package org.springframework.aop.interceptor;

import org.aopalliance.intercept.MethodInvocation;
import org.apache.commons.logging.Log;

import org.springframework.util.StopWatch;

/**
 * Simple AOP Alliance {@code MethodInterceptor} for performance monitoring.
 * This interceptor has no effect on the intercepted method call.
 *
 * <p>Uses a {@code StopWatch} for the actual performance measuring.
 *
 * @author Rod Johnson
 * @author Dmitriy Kopylenko
 * @author Rob Harrop
 * @see org.springframework.util.StopWatch
 * @see JamonPerformanceMonitorInterceptor
 */
@SuppressWarnings("serial")
public class PerformanceMonitorInterceptor extends AbstractMonitoringInterceptor {

    /**
     * Create a new PerformanceMonitorInterceptor with a static logger.
     */
    public PerformanceMonitorInterceptor() {
    }

    /**
     * Create a new PerformanceMonitorInterceptor with a dynamic or static logger,
     * according to the given flag.
     * @param useDynamicLogger whether to use a dynamic logger or a static logger
     * @see #setUseDynamicLogger
     */
    public PerformanceMonitorInterceptor(boolean useDynamicLogger) {
        setUseDynamicLogger(useDynamicLogger);
    }

    @Override
    protected Object invokeUnderTrace(MethodInvocation invocation, Log logger) throws Throwable {
        String name = createInvocationTraceName(invocation);
        StopWatch stopWatch = new StopWatch(name);
        stopWatch.start(name);
        try {
            return invocation.proceed();
        } finally {
            stopWatch.stop();
            writeToLog(logger, stopWatch.shortSummary());
        }
    }

}