@Aspect 어노테이션을 이용한 AOP - @After, @Around

※ @After : After Advice를 구현

  - 대상 객체의 메서드를 실행하는 도중에 예외가 발생했는지의 여부와 상관없이 메서드 실행 후 공통 기능을 실행(try~catch~finally의 finally 블록과 비슷) 

■ 대상 객체 및 호출되는 메서드에 대한 정보나 전달되는 파라미터에 대한 정보가 필요한 경우 org.aspectj.lang.JoinPoint를 파라미터로 명시

 

※ @Around : Around Advice를 구현

  - 대상 객체의 메서드 실행 전, 후 또는 예외 발생 시점에 공통 기능을 실행

  - Around Advice를 구현한 메서드는 org.aspectj.lang.ProceedingJoinPoint를 반드시 첫 번째 파리미터로 지정해야 함 -> 그렇지 않을 경우 예외 발생 

 

 

FaqBoardImpl.java

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

 

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("Board Check-1 : " + board.checkBoard());   System.out.println("<<===== END =====>>");      return null;  } }

 

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> </beans>

 

 

TestAspect.java - After Advice

package sp.aop.aspect; import org.aspectj.lang.JoinPoint; import org.aspectj.lang.annotation.After; import org.aspectj.lang.annotation.Aspect; @Aspect public class TestAspect {  @After("execution(public * sp.aop.service.*.*())")  public void afterFinally(JoinPoint joinPoint){   System.out.println("<<< after >>>");  } }

<<===== START =====>> <<< after >>> Board Name-1 : Notice Board <<< after >>> Board Check-1 : Y <<===== END =====>>

 

 

TestAspect.java - Around Advice

package sp.aop.aspect; import org.aspectj.lang.JoinPoint; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Aspect; @Aspect public class TestAspect {  @Around("execution(public * sp.aop.service.*.*(..))")  public Object around(ProceedingJoinPoint joinPoint) throws Throwable{   System.out.println("*");   System.out.println("**");      Object obj = joinPoint.proceed();      System.out.println("***");   System.out.println("****");      return obj;  } }

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

 

 

 

[참고자료] Spring 3.0 프로그래밍-최범균