Srping監聽Controller,Service,Dao 方法執行時間場景

介紹

通常MVC各層執行時間和效率和咱們很是關注，經過spring方法攔截器能夠實現該場景

步驟

1.applicationContext.xml配置

beanNames根據注入實例名稱來過濾攔截

interceptorNames 配置了具體攔截器實例Bean id

<?xml version="1.0" encoding="UTF-8"?>
<beans>
   
    <bean id="daoProxyCreator"
		class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
		<property name="interceptorNames">
			<list>
				<value>performanceInterceptor</value>
			</list>
		</property>
		<property name="beanNames">
			<list>
				<value>*Dao</value>
				<value>*Controller</value>
				<value>*Service</value>
			</list>
			
		</property>
	</bean>
	
  <bean id="performanceInterceptor"class="com..PerformanceInstrumentInterceptor">
		<property name="threshold" value="200"/>
	</bean>
</beans>

2.監聽執行時間攔截器

攔截器類實現MethodInterceptor

threshold爲超時閥值，超過這個閥值日誌打印出來

package com.interceptor;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class PerformanceInstrumentInterceptor implements MethodInterceptor {

	private static final Logger logger = LoggerFactory
			.getLogger(PerformanceInstrumentInterceptor.class);

	private long threshold=10;

	public long getThreshold() {
		return threshold;
	}

	public void setThreshold(long threshold) {
		this.threshold = threshold;
	}

	@Override
	public Object invoke(MethodInvocation invocation) throws Throwable {

		String name = invocation.getMethod().getDeclaringClass().getName()
				+ "." + invocation.getMethod().getName();

		long start = System.currentTimeMillis();

		try {
			return invocation.proceed();
			
		} finally {

			long elapseTime = System.currentTimeMillis() - start;

			if (elapseTime > threshold) {
				StringBuilder builder = new StringBuilder();
				builder.append("方法").append(name);
				builder.append("的執行時間超過閾值").append(threshold).append("毫秒,");
				builder.append("實際執行時間爲").append(elapseTime).append("毫秒.\r\n");
				logger.info(builder.toString());
			}
		}

	}

}