AOP around실습 - spring_aop_03_around

 

 

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

 
import aop.service.MemberService;

public class TestMain {
 public static void main(String[] args) {
  ApplicationContext ctx = new ClassPathXmlApplicationContext("aop/config/aop.xml");
  MemberService service = (MemberService)ctx.getBean("memberService");
  service.a();
  String str = service.c();
  System.out.println("main : "+str);
  
 

 }

}

 

package aop.advice;

import org.aspectj.lang.ProceedingJoinPoint;

public class LoggerAdvice {
 public Object aroundLogger(ProceedingJoinPoint jp)throws Throwable{
  System.out.println("---------before");
  try{
  Object retValue = jp.proceed();//클라이언트가 호출한 핵심 로칙 처리 메소드 호출
  System.out.println("---------after-returning : 리턴값 : "+retValue);
  
//  retValue = "asdfsdf";//String 값도 주소값으로 넘어다니기 때문에 retValue의 main에서의 값이 변한다.
  return retValue;
  }catch (Throwable ta) {
   System.out.println("--------after-throwing");
   throw ta;//여기서 예외를 처리하는 것이 아니기 때문에 호출한 곳으로 예외를 던져준다.
  }finally{
   System.out.println("--------after");
  }
  
 }
}

 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns:aop="http://www.springframework.org/schema/aop"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
  http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
 
 <bean name="memberService" class="aop.service.MemberService"/>
 <bean name="logger" class="aop.advice.LoggerAdvice"/>
 <aop:config>
  <aop:aspect id="loggerAS" ref="logger">
   <aop:around method="aroundLogger" pointcut="bean(*Service)"/>
  </aop:aspect>
 </aop:config>

</beans>

 

package aop.service;

public class MemberService {
 public void a(){
  System.out.println("MemberService.a() 실행");
 }
 public void b(){
  System.out.println("MemberService.b() 실행");
 }
 public String c(){
  System.out.println("MemberService.c() 실행");
  return "abc";
 }
}

 

* 결과

---------before
MemberService.a() 실행
---------after-returning : 리턴값 : null
--------after
---------before
MemberService.c() 실행
---------after-returning : 리턴값 : abc
--------after
main : abc