Spring aspectj annotation sample

aop_TracePerformance.java

package com.baidu.nightingale.common.aop;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 *  使用Spring AOP切面进行能分析. 将此注解声明在方法上，可将方法执行时间统计在LOG中
 *
 * @author lixiaomeng01
 * @date 2015-07-30 20:07
 */
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface TracePerformance {

    /**
     * 限定毫秒.
     *
     * @return
     */
    int limit();
}

aop_TracePerformanceAspect.java

package com.baidu.nightingale.common.aop;

import com.baidu.nightingale.common.log.LoggerHelper;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Service;

/**
 * 通过AOP切面统计方法调用时间.
 *
 * @author lixiaomeng01
 * @date 2015-07-30 20:10
 */
@Aspect
@Service
public class TracePerformanceAspect {


    /**
     * 将超过限定的执行时间写入LOG日志.
     *
     * @param pjp
     * @param tracePerformance
     * @return
     * @throws Throwable
     */
    @Around("@annotation(tracePerformance)")
    public Object invoke(ProceedingJoinPoint pjp, final TracePerformance tracePerformance)
            throws Throwable {
        long begin = System.currentTimeMillis();
        // 被切面的方法.
        Object result = pjp.proceed();
        long consumeMs = System.currentTimeMillis() - begin;
        if (consumeMs > tracePerformance.limit()) {
            String format = String.format("Target %s,Method %s eat %d ms", pjp.getTarget().getClass().getSimpleName(),
                    pjp.getSignature().toShortString(), consumeMs);
            LoggerHelper.warn(TracePerformanceAspect.class, format);
        }
        return result;
    }


}