Srping监听Controller,Service,Dao 方法执行时间场景

介绍

通常MVC各层执行时间和效率和咱们很是关注，经过spring方法拦截器能够实现该场景

步骤

1.applicationContext.xml配置

beanNames根据注入实例名称来过滤拦截

interceptorNames 配置了具体拦截器实例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.监听执行时间拦截器

拦截器类实现MethodInterceptor

threshold为超时阀值，超过这个阀值日志打印出来

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("的执行时间超过阈值").append(threshold).append("毫秒,");
				builder.append("实际执行时间为").append(elapseTime).append("毫秒.\r\n");
				logger.info(builder.toString());
			}
		}

	}

}