스프링 Schema-Based Spring AOP(<AOP> 네임스페이스 이용), 자바동영상/스프링동영상/자바교육/…

스프링 Schema-Based Spring AOP(<AOP> 네임스페이스 이용), 자바동영상/스프링동영상/자바교육/스프링교육/스프링프레임워크/스프링학원/자바학원/자바/JAVA



Schema-Based Spring AOP(<AOP> 네임스페이스 이용)

 

n  선언적인 스프링 AOP 설정을 간단하게 해 준다. <Beans> 태그 내에 aop 네임스페이스를 선언해야 한다.

n  모든 스프링 aop 설정을 <aop:config></aop:config> 안에 넣어야 하는데 포인트컷, 어스펙트, 어드바이저 등을 정의하고 다른 스프링 빈을 참조

 가능 하다aop:config 태그안에서 aspect를 정의하는 데 aspect=advisor=advice + pointcut 이므로 충고와 포인트컷을 aop:config안에서 정의해야 한다. 아래는 충고 클래스인 aBean을 외부에 선언하고 aop:config 태그안에서 ref로 참조 한 경우이다.

<aop:config>

    <aop:aspect id="myAspect" ref="aBean">

        ...

    </aop:aspect>

</aop:config>

 

<bean id="aBean" class="...">

    ...

</bean>

 

n  aop:aspect 내에 pointcut을 정의할 수도 있다.    

<aop:config>

    <aop:aspect id="myAspect" ref=“aBean“>

       <aop:pointcut id=“onjPointcut“ expression="execution(* x.y.z.service.*.*(..))"/>

         ……

    </aop:aspect>

</aop:config>

<bean id="aBean" class="...">

    ...

</bean>

 

n  pointcut을 정의하고 사전충고에서 포인트컷을 참조하고 충고메소드를 정의할 수도 있다.

<aop:config>

    <aop:aspect id="myAspect" ref="aBean">

       <aop:pointcut id=“onjPointcut“

expression=“execution(* x.y.z.service..*(..))"/>

<!– pointcut-ref 대신 pointcut 속성을 사용하여 직접 포인트컷 표현식을 써도 된다 à

<!—myLogic() 메소드가 사전 충고용 메소드임을 정의 à

        <aop:before pointcut-ref="onjPointcut " method="myLogic"/>

    </aop:aspect>

</aop:config>

   

<bean id="aBean" class="x.y.z.advice.MyAdvice">

    ...

</bean>

 

[MyAdvice.java]

// 충고 클래스인 MyAdvice.java 에서 myLogic이라는 메소드가 정의되어 있어야 한다.

package x.y.z.advice;

public class MyAdvice {

   public void myLogic(Object service) {  }

   …

}

 

n  포인트컷 조합을 and, or , not을 사용할 수 있다.

<aop:config>

    <aop:aspect id="myAspect" ref="aBean“>

       <aop:pointcut id=“onjPointcut“

expression=“execution(* x.y.z.service..*(..))

and bean(smallmart)"/>

        <aop:before pointcut-ref="onjPointcut " method="myLogic"/>

    </aop:aspect>

</aop:config>

<bean id=”smallmart” class=”x.y.z.service.SmallMart”/> <!—타겟 클래스 à

<bean id="aBean" class="x.y.z.advice.MyAdvice">

    ...

</bean>

 

[MyAdvice.java]

// 충고 클래스인 MyAdvice.java 에서 myLogic이라는 메소드가 정의되어 있어야 한다.

package x.y.z.advice;

public class MyAdvice {

   public void myLogic(Object service) {  }

   …

}

 

 

n  충고 작성 예문

// 포인트컷을 AspectJ Expression으로 직접 정의

<aop:before pointcut="execution(* x.y.z.dao.*.*(..))" method="insert"/>

 

// 포인트컷을 외부에 만들고 pointcut-ref로 참조

<aop:after-returning pointcut-ref="onjPointcut " method=“myLogic1"/>

<aop:after-throwing pointcut-ref="onjPointcut " method=“myLogic2”/>

<aop:after pointcut-ref="onjPointcut " method="myLogic3"/>

<aop:around pointcut-ref="onjPointcut " method="myLogic4"/>

<aop:around pointcut-ref="onjPointcut " method="myLogic4“ arg-names=“name, age”/>

 

n  Advisor 작성 예문

 <aop:config>

    <aop:pointcut id=“onjPointcut"

                 expression="execution(* x.y.z.service.*.*(..))"/>

    <aop:advisor pointcut-ref="onjPointcut" advice-ref="tx-advice"/>

</aop:config>

 

// 스프링 AOP를 이용하여 트랜잭션도 하나의 충고로 주입 가능하다.

// Pointcut 클래스(x.y.z.service 패키지 아래의 모든 클래스)의 모든 메소드가

// 트랜잭션(충고)이 적용됨을 정의한다.

<tx:advice id="tx-advice">

    <tx:attributes>

        <tx:method name="*" propagation="REQUIRED"/>

    </tx:attributes>

</tx:advice>

 

Schema-Based Spring AOP(<AOP> 네임스페이스 이용) – 실습

 

n  이전에 프로그래밍적인 AOP / ProxyFactoryBean(XML방식)을 이용하여 작성한 SmallMart 예제를 aop Namespace를 이용한 방식으로 변경해 보자.

n  스프링부트 기반 예제

 

9d98b8bba743a7d61ef834ca8859d689_1602408
 

 

STS에서

 

1. File -> New -> Spring Starter Project

Name : demo-smallmart-2

Type : MAVEN

Package : onj.hello.aop2

 

 

 

[pom.xml]

<?xml version="1.0" encoding="UTF-8"?>

<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>

           <parent>

                      <groupId>org.springframework.boot</groupId>

                      <artifactId>spring-boot-starter-parent</artifactId>

                      <version>2.3.4.RELEASE</version>

                      <relativePath/> <!-- lookup parent from repository -->

           </parent>

           <groupId>com.example</groupId>

           <artifactId>demo-smallmart-2</artifactId>

           <version>0.0.1-SNAPSHOT</version>

           <name>demo-smallmart-2</name>

           <description>Demo project for Spring Boot</description>

 

           <properties>

                      <java.version>1.8</java.version>

           </properties>

 

           <dependencies>

                      <dependency>

                                 <groupId>org.springframework.boot</groupId>

                                 <artifactId>spring-boot-starter</artifactId>

                      </dependency>

                     

                      <dependency>

                                 <groupId>org.springframework.boot</groupId>

                                 <artifactId>spring-boot-starter-aop</artifactId>

                      </dependency>

 

                      <dependency>

                                 <groupId>org.springframework.boot</groupId>

                                 <artifactId>spring-boot-starter-test</artifactId>

                                 <scope>test</scope>

                                 <exclusions>

                                             <exclusion>

                                                        <groupId>org.junit.vintage</groupId>

                                                        <artifactId>junit-vintage-engine</artifactId>

                                             </exclusion>

                                 </exclusions>

                      </dependency>

           </dependencies>

 

           <build>

                      <plugins>

                                 <plugin>

                                             <groupId>org.springframework.boot</groupId>

                                             <artifactId>spring-boot-maven-plugin</artifactId>

                                 </plugin>

                      </plugins>

           </build>

</project>

[SmallMart.java]

package onj.hello.aop2;

 

public interface SmallMart {

           public void getProducts(String productName) throws Exception;

public void getProducts2(String productName) throws Exception;

}

 

[SmallMart.java]

package onj.hello.aop2;

 

public class SmallMartImpl implements SmallMart {

           public void getProducts(String productName) throws Exception {

              System.out.println("[Target Method]getProduct()..." + productName);

              //throw new Exception("error...");  //주석으로 막고 실행해 보자.

           }

public void getProducts2(String productName) throws Exception {

              System.out.println("[Target Method]getProduct2()..." + productName);

              //throw new Exception("error...");  //주석으로 막고 실행해 보자.

           }

 

}

 

[SmallMartAdvice.java]

package onj.hello.aop2;

 

import org.aspectj.lang.JoinPoint;

import org.aspectj.lang.ProceedingJoinPoint;

 

public class SmallMartAdvice {

           public void afterReturning(JoinPoint joinPoint) {

                      System.out.println(joinPoint.getSignature().getName() + "(" + joinPoint.getArgs()[0] + ") : 사후충고");

           }

 

           public void before(JoinPoint joinPoint) {

                      System.out.println(joinPoint.getSignature().getName() + "(" + joinPoint.getArgs()[0] + ") : 사전충고");

           }

 

public void afterThrowing() {

                      System.out.println("예외충고 발생...");

           }

 

           public Object around(ProceedingJoinPoint pjp) throws Throwable {

                      String findName = (String)pjp.getSignature().getName();

                      String methodName = (String)pjp.getArgs()[0];

                      System.out.println("[주변충고]"+ findName + "(" + methodName +") 메소드 실행전");

                      //타켓클래스의 메소드 호출

                      Object obj = pjp.proceed(); 

                      System.out.println("[주변충고]" + findName + "(" + methodName +") 메소드 실행후");                 

                      return obj;

                      }

}

 

[DemoSmallmart2Application.java]

package onj.hello.aop2;

 

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.AbstractApplicationContext;

import org.springframework.context.support.GenericXmlApplicationContext;

 

@SpringBootApplication

public class DemoSmallmart2Application {

 

           public static void main(String[] args) throws Exception {

                      SpringApplication.run(DemoSmallmart2Application.class, args);

                     

                      ApplicationContext ctx = new GenericXmlApplicationContext();

                      ((GenericXmlApplicationContext) ctx).load("smallmart2.xml");

                      ((AbstractApplicationContext) ctx).refresh();

                      SmallMart smallMart = (SmallMart)ctx.getBean("smallMart");

                      smallMart.getProducts("과자");

                      smallMart.getProducts2("과자");

                      ((AbstractApplicationContext) ctx).close();

 

           }

 

}

[src/main/resources/smallmart2.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"

       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd

             http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd">

      

       <aop:config>

             <aop:pointcut expression="execution(* onj.hello.aop2..getProducts2*(String)) and bean(smallMart*)"

                    id="onjpointcut" />

             <aop:aspect ref="advice">

                    <aop:before method="before" pointcut-ref="onjpointcut" />

                    <aop:after-returning method="afterReturning"

                           pointcut-ref="onjpointcut" />

                    <aop:around method="around" pointcut-ref="onjpointcut" />

                    <aop:after-throwing method="afterThrowing"

                           pointcut-ref="onjpointcut" />

             </aop:aspect>

       </aop:config>

 

       <bean id="advice" class="onj.hello.aop2.SmallMartAdvice" />

       <bean id="smallMart" class="onj.hello.aop2.SmallMartImpl" />

      

 

</beans>

 

[결과]

[Target Method]getProduct()...과자

getProducts2(과자) : 사전충고

[주변충고]getProducts2(과자) 메소드 실행전

[Target Method]getProduct2()...과자

[주변충고]getProducts2(과자) 메소드 실행후

getProducts2(과자) : 사후충고

 

 

 

 



#AOP네임스페이스, #스프링AOP, #aop:config, #ProxyFactoryBean, #스프링포인트컷, #스프링충고, #포인트컷, #스프링pointcut, #스프링AOP, #스프링advice, #SpringAOP, #스프링DI, #스프링IoC, #SpringDI, #SpringIoC, #자바스프링, #Spring동영상, #Spring강의, #스프링프레임워크, #스프링교육, #스프링학원, #스프링강좌, #스프링강의, #자바학원, #자바, #스프링동영상, #자바동영상, #스프링프레임워크교육, #스프링프레임워크강의, #스프링프레임워크학원

, , , , , , , , , , , , , , , , , , , , , , , , ,

Comments