Advice 적용 순서

※ 하나의 JoinPoint에 한 개 이상의 Advice가 적용될 경우, 순서를 명시적으로 지정할 수 있음

  지정방법

    ▶ org.springframework.core.annotation.Order 어노테이션을 적용

    ▶ org.springframework.core.Ordered 인터페이스를 구현

 

 

 

■ @Order 어노테이션을 이용하는 방법

NoticeBoardImpl.java 

package sp.aop.service; import org.springframework.stereotype.Component;   @Component("noticeBoard") public class NoticeBoardImpl implements Board {  @Override  public String getBoardName() {   // TODO Auto-generated method stub   return "Notice Board";  }  @Override  public String checkBoard() {   // TODO Auto-generated method stub   return "Y";  } }

 

BoardController.java

package sp.aop.controller; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.ModelAndView; import sp.aop.service.Board;   public class BoardController extends   org.springframework.web.servlet.mvc.AbstractController {    @Resource(name="noticeBoard")  private Board board;    @Override  protected ModelAndView handleRequestInternal(HttpServletRequest arg0,    HttpServletResponse arg1) throws Exception {   // TODO Auto-generated method stub      System.out.println("<<===== START =====>>");   System.out.println("Board Name-1 : " + board.getBoardName());   System.out.println("<<===== END =====>>");      return null;  } }

 

TestAspect.java

package sp.aop.aspect; import org.aspectj.lang.JoinPoint; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Before; import org.aspectj.lang.annotation.Pointcut; import org.springframework.core.annotation.Order; @Aspect @Order(1) public class TestAspect {    @Pointcut("execution(* sp.aop.service.*.get*())")  private void getInfo(){};     @Before("getInfo()")  public void beforeLog(JoinPoint joinPoint){   System.out.println("--- beforeLog ---");  } }

 

LogAspect.java

package sp.aop.aspect; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Pointcut; import org.springframework.core.annotation.Order;   @Aspect @Order(2) public class LogAspect {    @Pointcut("execution(public * sp.aop.service.*.get*(..))")  private void profileTarget(){};     @Around("profileTarget()")  public Object allLog(ProceedingJoinPoint joinPoint) throws Throwable{   System.out.println("*");   System.out.println("**");      try{    Object ret = joinPoint.proceed();    return ret;   }finally{    System.out.println("***");    System.out.println("****");   }  } }

 

spring302-servlet.xml

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans"  xmlns:aop="http://www.springframework.org/schema/aop"  xmlns:context="http://www.springframework.org/schema/context"  xmlns:p="http://www.springframework.org/schema/p"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  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-3.0.xsd        http://www.springframework.org/schema/aop        http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">    <context:annotation-config/>  <aop:aspectj-autoproxy/>  <context:component-scan base-package="sp.aop.service"/>      <!-- HandlerMapping 설정 -->  <bean id="simpleUrlHandlerMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">   <property name="mappings">    <props>     <prop key="/aoptest01.sp">boardController</prop>    </props>   </property>  </bean>    <!-- 각종 bean 설정 -->  <bean id="boardController" class="sp.aop.controller.BoardController"></bean>  <bean id="testAspect" class="sp.aop.aspect.TestAspect"></bean>  <bean id="logAspect" class="sp.aop.aspect.LogAspect"></bean> </beans>

 

 

결과 => LogAspect : Order(2), TestAspect : Order(1)

<<===== START =====>> --- beforeLog --- * ** *** **** Board Name-1 : Notice Board <<===== END =====>>

 

결과 => LogAspect : Order(1), TestAspect : Order(2)

<<===== START =====>> * ** --- beforeLog --- *** **** Board Name-1 : Notice Board <<===== END =====>>

● 적용 순서 값이 낮은 Advice의 우선 순위가 더 높다. 순서 값이 1인 Advice가 순서 값인 2인 Advice보다 우선 순위가 높다. 메서드 호출 전, 메서드 호출에 대해서느 우선 순위가 높은 Advice가 먼저 실행되고, 메서드 호출 후에 대해서는 우선 순위가 낮은 Advice가 먼저 실행

 

 

 

■ XML 스키마를 사용할 경우 <aop:asect> 태그의 order 속성을 사용

<aop:config>   <aop:aspect id="" ref="" order="1">    <aop:pointcut expression="" id=""/>    <aop:around method=""/>   </aop:aspect>  </aop:config>

 

 

 

[참고자료] Spring 3.0 프로그래밍-최범균