AOP - XML 스키마 기반

XML 스키마 기반 AOP를 구현하는 과정

  ① 관련 jar 파일을 클래스패스에 추가

  ② 공통 기능을 제공하는 Advice 클래스를 구현

  ③ XML 설정 파일에서 <aop:config>를 이용해서 Aspect를 설정한다. Advice를 어떤 PointCut에 적용할지를 지정하게 됨

 

 

FaqBoardImpl.java

package sp.aop.service; public class FaqBoardImpl implements Board {    @Override  public String getBoardName() {   // TODO Auto-generated method stub   return "FAQ Board";  } }

 

NoticeBoardImpl.java

package sp.aop.service; public class NoticeBoardImpl implements Board {    @Override  public String getBoardName() {   // TODO Auto-generated method stub   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("<<===== END =====>>");   System.out.println("Board Name-2 : " + board.getBoardName());      return null;  } }

 

TimeCheckAdvice.java

package sp.aop.advice; import org.aspectj.lang.ProceedingJoinPoint;   public class TimeCheckAdvice {  public Object timeChk(ProceedingJoinPoint joinPoint) throws Throwable{   String signatureStr = joinPoint.getSignature().toShortString();   System.out.println(signatureStr + "시작");   long start = System.currentTimeMillis();      try{    Object result = joinPoint.proceed();    return result;   }finally{    long finish = System.currentTimeMillis();    System.out.println(signatureStr + "종료");        System.out.println(signatureStr + "실행시간 : " + (finish - start) + "ms");   }  } }

 

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/>      <!-- 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>    <!-- Aspect 설정 : Advice를 어떤 PointCut에 적용할 지 설정 -->  <aop:config>   <aop:aspect id="timeAspect" ref="timeCheckAdvice">    <aop:pointcut id="publicMethod" expression="execution(public * sp.aop..*(..))"/>    <aop:around pointcut-ref="publicMethod" method="timeChk"/>   </aop:aspect>  </aop:config>    <bean id="noticeBoard" class="sp.aop.service.NoticeBoardImpl"></bean>  <bean id="faqBoard" class="sp.aop.service.FaqBoardImpl"></bean>   </beans>

●위 AOP의 해석

  ▶ timeCheckAdvice 빈이 Aspect 기능을 제공함

  ▶ timeAspect가 sp.aop 패키지 및 그 하위 패키지의 모든 public 메소드에 Around Advice로 적용되며, 이때 Aspect의 구현 클래스인 TimeCheckAdvice의 timeChk() 메소드가 호출됨

 

※AOP 태그 설명 

<aop:config>	AOP 설정 정보임을 나타냄
<aop:aspect>	Aspect를 설정
<aop:pointcut>	Pointcut을 설정
<aop:around>	Around Advice를 설정, 이 외에도 다양한 Advice를 설정

 

 

 

결과

<<===== START =====>> Board.getBoardName()시작 Board.getBoardName()종료 Board.getBoardName()실행시간 : 1ms Board Name-1 : Notice Board <<===== END =====>> Board.getBoardName()시작 Board.getBoardName()종료 Board.getBoardName()실행시간 : 0ms Board Name-2 : Notice Board

 

 

 

 

[참고자료] Spring 3.0 프로그래밍 - 최범균