Advisor ( 1 )

[ 이전 글 ]

After Returning • Throwing Advice

After Returning • Throwing Advice

 

Weaving : 주업무와 보조업무를 엮는행위 ( 뜨개질의 의미를 가진 단어임 )

JoinPoint : Proxy의 타켓이 가진 메소드 중 실행 할 수 있는 메소드

Pointcuts : Proxy에서 실행할 메소드, 원하는 메소드만 실행

 

Advisor : Advice와 Pointcut과 연결하는 클래스

 

<?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/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
		http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.3.xsd">
		
	<!-- main -->
	<bean id="target" class="spring.aop.entity.ScoreExam" p:kor="1"  p:eng="1" p:math="1" p:com="1"/>
	
	<!-- Advice -->
	<bean id="logAroundAdvice" class="spring.aop.advice.LogAroundAdvice"/>
	<bean id="logBeforeAdvice" class="spring.aop.advice.LogBeforeAdvice"/>
	<bean id="logAfterReturningAdvice" class="spring.aop.advice.LogAfterReturningAdvice"/>
	<bean id="logAfterThrowingAdvice" class="spring.aop.advice.LogAfterThrowingAdvice"/>
	
	<!-- Pointcut -->
	<bean id="classicPointCut" class="org.springframework.aop.support.NameMatchMethodPointcut">
		<property name="mappedName" value="total"/>
	</bean>
	
	<!-- connect advice and pointcut -->
	<bean id="classicBeforeAdvisor" class="org.springframework.aop.support.DefaultPointcutAdvisor">
		<property name="advice" ref="logBeforeAdvice"/>
		<property name="pointcut" ref="classicPointCut"/>
	</bean>
	
	<bean id="classicAroundAdvisor" class="org.springframework.aop.support.DefaultPointcutAdvisor">
		<property name="advice" ref="logAroundAdvice"/>
		<property name="pointcut" ref="classicPointCut"/>
	</bean>
	
	<!-- Proxy -->
	<bean id="proxy" class="org.springframework.aop.framework.ProxyFactoryBean">
		<property name="target" ref="target"/>
		<property name="interceptorNames">
			<list>
				<value>classicAroundAdvisor</value>
				<value>classicBeforeAdvisor</value>
				<value>logAfterReturningAdvice</value>
				<value>logAfterThrowingAdvice</value>
			</list>
		</property>
	</bean>
	
</beans>

Advisor를 하나씩 추가하면서 main()을 실행해보면서 차이점을 느껴보자

Pointcut에서 total() 메소드만 실행하기 때문에  avg() 메소드 실행때와 다른 결과가 출력된다

Pointcut과 Advisor의 property는 각 객체별로 가지고 있는 setter이다 즉, 고정이다

 

가장 클래식한 방법으로 XML의 길이가 많이 길어진다

다음글에서 더 편하게 변형해보자