Spring application - AOP 어노테이션 기반 간단예제

1. Main

public class Main {
	
	public static void main(String[] args) {
		ApplicationContext context = new ClassPathXmlApplicationContext("init2.xml");
		
		LogicImpl impl = context.getBean("logicImpl", LogicImpl.class);
		impl.selectDataProcess(); //AOP 적용 로직
		System.out.println();
		
		impl.updateDataPart(); //AOP 미적용 로직
	}
}

 

2. init2.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">

	<aop:aspectj-autoproxy></aop:aspectj-autoproxy>
	<context:component-scan base-package="pack2" />
	
</beans>

 

3. aspect

@Component
@Aspect
public class Aspect1 {
	
	@Around("execution(public void selectDataProcess())")
	public Object aspectProceed(ProceedingJoinPoint joinPoint) throws Throwable{
		String methodName = joinPoint.getSignature().toString();
		
		System.out.println(methodName + " 시작 전에 작업을 수행");
		Object object = joinPoint.proceed();
		System.out.println(methodName + " 처리 후에 작업을 수행");
		
		return object;
	}
}

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

 - @After는 대상 객체의 메서드 실행 후, @Before는 대상 객체의 메서드 실행 전에 공통 기능을 실행

 - execution : Advice를 적용할 메서드를 명시

기본 형식 : execution(수식어패턴? 리턴타입패턴 클래스이름패턴?이름패턴(파라미터패턴)

• 수식어패턴 : public, private 등등의 수식어를 명시, 생략 가능
• 리턴타입 : 리턴 타입을 명시
• 클래스이름, 이름패턴 : 클래스 이름 및 메서드이름을 패턴으로 명시
• 파라미터패턴 : 매칭될 파라미터에 대해 명시
• '*' : 모든 값을 표현
• '..' : 0개 이상을 의미
• 위 코드와 같이 public void selectDataProcess() 라고만 쓰면 그 메소드에만 적용하는 것.

 

 

 

4. dao

@Repository("articleDao")
public class ArticleDao{
	public void selectAll() {
		System.out.println("DB를 조회하는 메소드");
	}
}

 

5. impl

@Service
public class LogicImpl{
	//핵심 로직
	@Autowired
	@Qualifier("articleDao")
	private ArticleDao articleDao;
	
	public LogicImpl() {}
	
	public void selectDataProcess() {
		articleDao.selectAll();
	}
	
	public void updateDataPart() {
		System.out.println("aspect 미적용 메소드");
	}
}

 

6. pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>aa</groupId>
  <artifactId>teesst</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  
    <properties>
		<!-- Generic properties -->
		<java.version>1.8</java.version>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

		<!-- Spring -->
		<spring-framework.version>5.0.0.RELEASE</spring-framework.version>
	</properties>

	<dependencies>
		<!-- Spring and Transactions -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${spring-framework.version}</version>
		</dependency>
		<!-- AOP (https://search.maven.org/artifact/org.aspectj/aspectjweaver/1.9.5/jar) -->
		<dependency>
			<groupId>org.aspectj</groupId>
			<artifactId>aspectjweaver</artifactId>
			<version>1.9.5</version>
		</dependency>
	</dependencies>
	
</project>

 

7. 실행 결과

 

 

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참고 

1.  https://snoopy81.tistory.com/296

2.  https://snoopy81.tistory.com/292