[스프링AOP 포인트컷] 예제코드

1. Annotation

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@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
public @interface ClassAop {
}

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME) //Runtime때까지 annotation유지
public @interface MethodAop {
    String value();
}

• @Target: Indicates the contexts in which an annotation type is applicable. 
• @Retention: Indicates how long annotations with the annotated type are to be retained.

 

 

2. MemberService

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public interface MemberService {
    String hello(String param);
}

@ClassAop
@Component
public class MemberServiceImpl implements MemberService{

    @Override
    @MethodAop("test value")
    public String hello(String param) {
        return "ok";
    }

    public String internal(String param){
        return "ok";
    }
}

 

3. Test

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@Slf4j
public class ExecutionTest {

    AspectJExpressionPointcut pointcut = new AspectJExpressionPointcut();
    Method helloMethod;

    @BeforeEach
    public void init() throws NoSuchMethodException {
        helloMethod = MemberServiceImpl.class.getMethod("hello", String.class);
    }

    @Test
    void printMethod(){
        log.info("helloMethod={}", helloMethod);
    }
}

• AspectJExpressionPointcut 이 바로 포인트컷 표현식을 처리해주는 클래스다. 
• 여기에 포인트컷 표현식을 지정하면 된다. 
• AspectJExpressionPointcut 는 상위에 Pointcut 인터페이스를 가진다.
• printMethod() 테스트는 MemberServiceImpl.hello(String) 메서드의 정보를 출력해준다.

helloMethod=public java.lang.String hello.aop.member.MemberServiceImpl.hello(java.lang.String)

• 이번에 알아볼 execution 으로 시작하는 포인트컷 표현식은 
• 이 메서드 정보를 매칭해서 포인트컷 대상을 찾아낸다.

 

 

4. GitHub: 220105 SpringAop - Pointcut

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GitHub - bsh6463/SpringAOP