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Spring Framework example source code file (PerformanceMonitorListener.java)

This example Spring Framework source code file (PerformanceMonitorListener.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Spring Framework tags/keywords

applicationlistener, applicationlistener, log, performancemonitorlistener, performancemonitorlistener, requesthandledevent, requesthandledevent, responsetimemonitorimpl, responsetimemonitorimpl

The Spring Framework PerformanceMonitorListener.java source code

/*
 * Copyright 2002-2008 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
 *
 *      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.
 */

package org.springframework.web.context.support;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.util.ResponseTimeMonitorImpl;

/**
 * Listener that logs the response times of web requests.
 * To be registered as bean in a WebApplicationContext.
 *
 * <p>Logs performance statistics using Commons Logging at "trace" level.
 *
 * @author Rod Johnson
 * @author Juergen Hoeller
 * @since January 21, 2001
 * @see RequestHandledEvent
 * @deprecated as of Spring 2.5, to be removed in Spring 3.0.
 * Use a custom ApplicationListener specific to your needs instead.
 */
public class PerformanceMonitorListener implements ApplicationListener {

	protected final Log logger = LogFactory.getLog(getClass());

	protected final ResponseTimeMonitorImpl responseTimeMonitor = new ResponseTimeMonitorImpl();


	public void onApplicationEvent(ApplicationEvent event) {
		if (event instanceof RequestHandledEvent) {
			RequestHandledEvent rhe = (RequestHandledEvent) event;
			this.responseTimeMonitor.recordResponseTime(rhe.getProcessingTimeMillis());
			if (logger.isTraceEnabled()) {
				logger.trace("PerformanceMonitorListener: last=[" + rhe.getProcessingTimeMillis() + "ms]; " +
						this.responseTimeMonitor + "; " + rhe.getShortDescription());
			}
		}
	}

}

Other Spring Framework examples (source code examples)

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