@Aspect 어노테이션을 이용한 AOP - @AfterThrowing

※ AfterThrowing 어노테이션을 사용하면 After Throwing Advice 메서드를 구현할 수 있음

  - 대상 객체의 메서드를 실행하는 도중 예외가 발생한 경우에 공통 기능을 실행

 

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

 

 

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   int num = 100 / 0;   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;  } }

 

TestAspect.java

package sp.aop.aspect; import org.aspectj.lang.JoinPoint; import org.aspectj.lang.annotation.AfterReturning; import org.aspectj.lang.annotation.AfterThrowing; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Before;   @Aspect public class TestAspect {    @AfterThrowing(pointcut="execution(public* sp.aop.service.*.*(..))", throwing="ex")  public void afterThrowing(JoinPoint joinPoint, Throwable ex){   System.out.println("<<< after throwing >>>");   System.out.println("ex message : " + ex.toString());  } }

● Advice 구현 메서드 내에서 Advice 대상 메서드가 발생시킨 예외 개체에 접근하려면 throwing속성을 이용해서 예외 객체를 전달 받을 파라미터의 이름을 지정해주면 됨

● 특정 타입의 예외에 대해서만 처리하고 싶다면, Throwable이나 Exception이 아닌 처리하고 싶은 타입을 파라미터로 지정하면 됨

  => public void afterThrowing(FileNotFoundException ex){ ... }

 

 

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>

 

결과

<<===== START =====>> <<< after throwing >>> ex message : java.lang.ArithmeticException: / by zero 2012. 5. 9 오후 9:13:07 org.apache.catalina.core.StandardWrapperValve invoke 심각: Servlet.service() for servlet spring302 threw exception ......

 

 

 

[참고자료] Spring 3.0 프로그래밍-최범균