[Spring] 18.Spring AOP(XML, AfterReturningAdvice)

Advice 동작 시점	설명
Before	비지니스 메서드 실행 전 동작
After	- AfterReturning : 비지니스 메서드가 성공적으로 리턴되면 동작 - AfterThrowing : 비지니스 메서드 실행 중 예외가 발생하면 동작(마치 try~catch 블록에서 catch 블록에 해당) - After : 비지니스 메서드가 실행된 후, 무조건 실행(try~catch~finally 블록에서 finally 블록에 해당)
Around	Around는 메서드 호출 자체를 가로채 비지니스 메서드 실행 전후에 처리할 로직을 삽입할 수 있음

 

// AfterReturningAdvice 인터페이스를 구현한 LogAfterReturningAdvice 클래스

package spring.aop.advice;

import java.lang.reflect.Method;

import org.springframework.aop.AfterReturningAdvice;

public class LogAfterReturningAdvice implements AfterReturningAdvice{

	@Override
	public void afterReturning(Object returnValue, Method method, Object[] args, Object target) throws Throwable {
		System.out.println("returnValue:"+returnValue + ", method:" + method.getName());
	}

}

 

// setting.xml

<?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:p="http://www.springframework.org/schema/p"
       xmlns:util="http://www.springframework.org/schema/util"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
       http://www.springframework.org/schema/util
       http://www.springframework.org/schema/util/spring-util-3.0.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context-3.0.xsd">
	
	
	<bean id="target" class="spring.aop.entity.NewlecExam" p:kor="1" p:eng="1" p:com="1" p:math="1"/>
	<bean id="logAroundAdvice" class="spring.aop.advice.LogAroundAdvice"/>
	<bean id="logBeforeAdvice" class="spring.aop.advice.LogBeforeAdvice"/>
	<bean id="logAfterReturningAdvice" class="spring.aop.advice.LogAfterReturningAdvice"/> // 추가
	<bean id="proxy" class="org.springframework.aop.framework.ProxyFactoryBean">
		<property name="target" ref="target" />
		<property name="interceptorNames">
			<list>
				<value>logAroundAdvice</value>
				<value>logBeforeAdvice</value>
				<value>logAfterReturningAdvice</value> // 추가
			</list>
		</property>
	</bean>

</beans>

 

package spring.aop;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

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

import spring.aop.entity.Exam;
import spring.aop.entity.NewlecExam;

public class Program {

	public static void main(String[] args) {
		
		ApplicationContext context = new ClassPathXmlApplicationContext("spring/aop/setting.xml"); //추가
		
		Exam proxy = (Exam) context.getBean("proxy");
		
		System.out.printf("total is %d\n", proxy.total());
		System.out.printf("avg is %f\n", proxy.avg());
						
	}

}

// <출력>
//앞에서 실행될 로직
//returnValue:4, method:total
//206ms 시간이 걸렸습니다.
//total is 4
//앞에서 실행될 로직
//returnValue:1.0, method:avg
//207ms 시간이 걸렸습니다.
//avg is 1.000000

 

참고자료

[1] 유튜브 채널 뉴렉처 - After Returning / Throwing 어드바이스 구현하기