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Merge pull request #7 from chhs2131/SpringMVC
AOP 및 자바Proxy 예제 추가
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‎aop-example/.gitignore‎

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HELP.md
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.gradle
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build/
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!gradle/wrapper/gradle-wrapper.jar
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!**/src/main/**/build/
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!**/src/test/**/build/
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### STS ###
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.apt_generated
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.classpath
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.factorypath
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.project
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.settings
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.springBeans
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.sts4-cache
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bin/
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!**/src/main/**/bin/
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!**/src/test/**/bin/
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### IntelliJ IDEA ###
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.idea
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*.iws
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*.iml
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*.ipr
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out/
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!**/src/main/**/out/
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!**/src/test/**/out/
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### NetBeans ###
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/nbproject/private/
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/nbbuild/
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/dist/
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/nbdist/
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/.nb-gradle/
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### VS Code ###
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.vscode/

‎aop-example/README.md‎

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# AOP 예시
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관점 지향 프로그래밍 예제입니다. 순사 자바 Proxy에 대해 먼저 소개하고, Spring이 제공하는 AOP에 대해 살펴봅니다.
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</br>
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## 순수 자바의 Proxy
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```java
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package org.example.aopexample;
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import java.lang.reflect.InvocationHandler;
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import java.lang.reflect.Proxy;
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import org.example.aopexample.job.Worker;
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public class WorkerProxy {
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private Worker worker;
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public WorkerProxy(Worker worker) {
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this.worker = worker;
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}
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public Worker getWorker() {
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return (Worker) Proxy.newProxyInstance(
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Worker.class.getClassLoader(),
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new Class[]{Worker.class},
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workerHandler()
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);
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}
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private InvocationHandler workerHandler() {
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return (proxy, method, args) -> {
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System.out.println("====================================================================================");
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System.out.println("관리자: 일해라! 이놈아!");
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long start = System.currentTimeMillis();
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Object result = method.invoke(worker, args);
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long end = System.currentTimeMillis();
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System.out.println("관리자: 일하는데 " + (double) (end-start)/1000 + "초가 걸렷네!!");
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System.out.println("====================================================================================");
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return result;
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};
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}
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}
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```
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</br>
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### 실행결과
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```javascript
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요리사: 요리을 합니다.
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요리사: 요리완료!
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====================================================================================
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관리자: 일해라! 이놈아!
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개발자: 코딩을 합니다.
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개발자: 코딩완료!
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관리자: 일하는데 1.005초가 걸렷네!!
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====================================================================================
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====================================================================================
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관리자: 일해라! 이놈아!
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요리사: 요리을 합니다.
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요리사: 요리완료!
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관리자: 일하는데 1.501초가 걸렷네!!
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====================================================================================
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```
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</br>
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</br>
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</br>
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## 스프링 AOP
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### 의존성 추가
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```groovy
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dependencies {
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/* 스프링 AOP 사용을 위해 추가 */
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implementation 'org.springframework.boot:spring-boot-starter-aop'
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}
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```
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</br>
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### Controller
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```java
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@RestController
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public class WorkerController {
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@GetMapping("/cook")
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void cook() {
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final Cooker cooker = new Cooker();
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cooker.work();
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}
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@GetMapping("/coding")
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void coding() {
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final Programmer programmer = new Programmer();
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programmer.work();
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}
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}
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```
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</br>
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### AOP Class
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```java
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package org.example.aopexample;
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import org.aspectj.lang.annotation.Aspect;
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import org.aspectj.lang.annotation.Before;
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import org.aspectj.lang.annotation.After;
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import org.aspectj.lang.annotation.Around;
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import org.aspectj.lang.ProceedingJoinPoint;
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import org.springframework.stereotype.Component;
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@Aspect
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@Component
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public class WorkerAspect {
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// WorkerController의 cook 메소드를 실행하기 전에 실행
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@Before("execution(* org.example.aopexample.spring.WorkerController.cook(..))")
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public void beforeCooking() {
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System.out.println("요리 재료를 준비합니다...");
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}
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// WorkerController의 coding 메소드를 실행한 후에 실행
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@After("execution(* org.example.aopexample.spring.WorkerController.coding(..))")
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public void afterCoding() {
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System.out.println("리팩토링을 진행합니다...");
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}
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// WorkerController에 있는 모든 메소드 실행에 AOP를 지정
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@Around("execution(* org.example.aopexample.spring.WorkerController.*(..))")
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public Object aroundWorkerActivities(ProceedingJoinPoint joinPoint) throws Throwable {
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System.out.println("====================================================================================");
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System.out.println("관리자: 일해라! 이놈아!" + joinPoint.getSignature().getName());
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long start = System.currentTimeMillis();
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Object result = joinPoint.proceed(); // Proceed with the original method call
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long end = System.currentTimeMillis();
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System.out.println("관리자: 일하는데 " + (double) (end-start)/1000 + "초가 걸렷네!!" + joinPoint.getSignature().getName());
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System.out.println("====================================================================================");
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return result;
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}
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}
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```
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</br>
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### 실행결과
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```javascript
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. ____ _ __ _ _
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/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
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( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
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\\/ ___)| |_)| | | | | || (_| | ) ) ) )
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' |____| .__|_| |_|_| |_\__, | / / / /
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=========|_|==============|___/=/_/_/_/
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:: Spring Boot :: (v3.2.3)
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2024-03-12T02:04:49.750+09:00 INFO 12397 --- [aop-example] [ main] o.e.aopexample.AopExampleApplication : Starting AopExampleApplication using Java 17.0.4.1 with PID 12397 (/Users/hyeon/Documents/GitHub/SpringExample/aop-example/build/classes/java/main started by hyeon in /Users/hyeon/Documents/GitHub/SpringExample/aop-example)
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2024-03-12T02:04:49.752+09:00 INFO 12397 --- [aop-example] [ main] o.e.aopexample.AopExampleApplication : The following 1 profile is active: "local"
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2024-03-12T02:04:50.091+09:00 INFO 12397 --- [aop-example] [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port 8080 (http)
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2024-03-12T02:04:50.095+09:00 INFO 12397 --- [aop-example] [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
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2024-03-12T02:04:50.095+09:00 INFO 12397 --- [aop-example] [ main] o.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/10.1.19]
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2024-03-12T02:04:50.112+09:00 INFO 12397 --- [aop-example] [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
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2024-03-12T02:04:50.112+09:00 INFO 12397 --- [aop-example] [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 344 ms
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2024-03-12T02:04:50.256+09:00 INFO 12397 --- [aop-example] [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port 8080 (http) with context path ''
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2024-03-12T02:04:50.262+09:00 INFO 12397 --- [aop-example] [ main] o.e.aopexample.AopExampleApplication : Started AopExampleApplication in 0.631 seconds (process running for 4.865)
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2024-03-12T02:04:53.217+09:00 INFO 12397 --- [aop-example] [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
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2024-03-12T02:04:53.217+09:00 INFO 12397 --- [aop-example] [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
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2024-03-12T02:04:53.219+09:00 INFO 12397 --- [aop-example] [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 2 ms
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====================================================================================
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관리자: 일해라! 이놈아!cook
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요리 재료를 준비합니다...
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요리사: 요리을 합니다.
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요리사: 요리완료!
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관리자: 일하는데 1.505초가 걸렷네!!cook
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====================================================================================
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====================================================================================
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관리자: 일해라! 이놈아!coding
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개발자: 코딩을 합니다.
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개발자: 코딩완료!
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리팩토링을 진행합니다...
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관리자: 일하는데 1.005초가 걸렷네!!coding
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====================================================================================
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```
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‎aop-example/build.gradle‎

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plugins {
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id 'java'
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id 'org.springframework.boot' version '3.2.3'
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id 'io.spring.dependency-management' version '1.1.4'
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}
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group = 'org.example'
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version = '0.0.1-SNAPSHOT'
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java {
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sourceCompatibility = '17'
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}
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configurations {
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compileOnly {
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extendsFrom annotationProcessor
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}
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}
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repositories {
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mavenCentral()
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}
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dependencies {
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/* 스프링 AOP 사용을 위해 추가 */
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implementation 'org.springframework.boot:spring-boot-starter-aop'
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implementation 'org.springframework.boot:spring-boot-starter-web'
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compileOnly 'org.projectlombok:lombok'
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annotationProcessor 'org.projectlombok:lombok'
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testImplementation 'org.springframework.boot:spring-boot-starter-test'
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}
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tasks.named('test') {
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useJUnitPlatform()
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}

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