Advice 타입 별 클래스 작성 <aop:after-throwing>

<aop:after-throwing>

  - After Throwing Advice는 대상 객체의 메서드가 예외를 발생시킨 경우에 적용되는 Advice

 

 

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";  } }

 

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;                   //강제로 예외 발생   return "Notice Board";  } }

 

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("<<===== RUNNING =====>>");   System.out.println("Board Name-2 : " + board.getBoardName());   System.out.println("<<===== END =====>>");      return null;  } }

 

LogAdvice.java

package sp.aop.advice; import org.aspectj.lang.JoinPoint; import org.aspectj.lang.ProceedingJoinPoint;   public class LogAdvice {  public Object logPrint(ProceedingJoinPoint joinPoint) throws Throwable{   System.out.println("***** START *****");   try{    System.out.println("*");    System.out.println("**");        Object ret = joinPoint.proceed();        System.out.println("***");    System.out.println("****");        return ret;   }finally{    System.out.println("***** END *****");   }  }    public void afterThrowing(Throwable exp){   System.out.println("***** after-throwing *****");   System.out.println("ex : " + exp.toString());  } }

●Advice 구현 메서드에서 발생된 예외를 사용하려면 <aop:after-throwing> 태그의 throwing 속성에 명시한 이름을 갖는 파라미터를 추가하면 됨

=> <aop:after-throwing pointcut-ref="logPrint" method="afterThrowing" throwing="exp"/>
   throwing="aaa" 라고 했다면 afterThrowing(Throwable aaa){ ... }라고 하면 됨.

 

 

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/>  <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>    <!-- Advice 클래스를 빈으로 등록 -->  <bean id="timeCheckAdvice" class="sp.aop.advice.TimeCheckAdvice"></bean>  <bean id="logAspect" class="sp.aop.advice.LogAdvice"></bean>    <!-- Aspect 설정 : Advice를 어떤 PointCut에 적용할 지 설정 -->  <aop:config>   <aop:aspect id="logPrtAspect" ref="logAspect">    <aop:pointcut id="logPrint" expression="execution(* sp.aop..*.*(..))"/>    <aop:after-throwing pointcut-ref="logPrint" method="afterThrowing" throwing="exp"/>   </aop:aspect>  </aop:config>   </beans>

●대상 객체의 메서드가 발생시킨 예외 객체가 필요한 경우 throwing 속성에 예외 객체를 전달받을 파라미터의 이름을 명시하면 됨. 

●특정 타입의 예외에 대해서만 처리하고 싶다면, Throwable이나 Exception이 아니라 처리하고 싶은 예외 타입을 파라미터로 지정하면 됨 => afterThrowing(FileNotFoundException ex){ ... }

●대상 객체 및 호출되는 메서드에 대한 정보나 전달되는 파라미터에 대한 정보나 필요 한 경우 다음과 같이 org.aspectj.lang.JoinPoint를 파라미터로 추가 =>

afterThrowing(JoinPoint joinPoint, Exception ex){ .. }

 

 

결과

<<===== START =====>> ***** after-throwing ***** ex : java.lang.ArithmeticException: / by zero 2012. 5. 5 오후 4:24:37 org.apache.catalina.core.StandardWrapperValve invoke 심각: Servlet.service() for servlet spring302 threw exception java.lang.ArithmeticException: / by zero

 

 

[참고자료] Spring 3.0 프로그래밍-최범균