고급편/섹션4: 예제 프로젝트 만들기 v1 (#5)

섹션4: 프록시 패턴과 데코레이터 패턴

스프링 로드맵5 고급편/proxy/src/main/java/hello/proxy/ProxyApplication.java

@@ -1,9 +1,13 @@
 package hello.proxy;
 
+import hello.proxy.config.AppV1Config;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Import;
 
-@SpringBootApplication(scanBasePackages = "hello.proxy.app") //주의
+@Import(AppV1Config.class)
+@SpringBootApplication(scanBasePackages = "hello.proxy.app")
+// 주의 config 하위 클래스 AppV1Config 등을 컴포넌트 스캔 대상에 두지 않기 위해 작업
 public class ProxyApplication {
 
 	public static void main(String[] args) {

스프링 로드맵5 고급편/proxy/src/main/java/hello/proxy/app/v1/OrderControllerV1.java

@@ -0,0 +1,17 @@
+package hello.proxy.app.v1;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+@RequestMapping // Spring은 @Controller 또는 @RequestMapping이 있어야 스프링 컨트롤러로 인식
+@ResponseBody
+public interface OrderControllerV1 {
+
+    @GetMapping("/v1/request")
+    String request(@RequestParam("itemId") String itemId);
+
+    @GetMapping("/v1/no-log")
+    String noLog();
+}

스프링 로드맵5 고급편/proxy/src/main/java/hello/proxy/app/v1/OrderControllerV1Impl.java

@@ -0,0 +1,20 @@
+package hello.proxy.app.v1;
+
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+public class OrderControllerV1Impl implements OrderControllerV1 {
+
+    private final OrderServiceV1 orderService;
+
+    @Override
+    public String request(final String itemId) {
+        orderService.orderItem(itemId);
+        return "ok";
+    }
+
+    @Override
+    public String noLog() {
+        return "noLog";
+    }
+}

스프링 로드맵5 고급편/proxy/src/main/java/hello/proxy/app/v1/OrderRepositoryV1.java

@@ -0,0 +1,5 @@
+package hello.proxy.app.v1;
+
+public interface OrderRepositoryV1 {
+    void save(String itemId);
+}

스프링 로드맵5 고급편/proxy/src/main/java/hello/proxy/app/v1/OrderRepositoryV1Impl.java

@@ -0,0 +1,20 @@
+package hello.proxy.app.v1;
+
+public class OrderRepositoryV1Impl implements OrderRepositoryV1 {
+    @Override
+    public void save(final String itemId) {
+        // 저장 로직
+        if (itemId.equals("ex")) {
+            throw new IllegalStateException("예외 발생");
+        }
+        sleep(1000);
+    }
+
+    private void sleep(final int mills) {
+        try {
+            Thread.sleep(mills);
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

스프링 로드맵5 고급편/proxy/src/main/java/hello/proxy/app/v1/OrderServiceV1.java

@@ -0,0 +1,5 @@
+package hello.proxy.app.v1;
+
+public interface OrderServiceV1 {
+    void orderItem(String itemId);
+}

스프링 로드맵5 고급편/proxy/src/main/java/hello/proxy/app/v1/OrderServiceV1Impl.java

@@ -0,0 +1,14 @@
+package hello.proxy.app.v1;
+
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+public class OrderServiceV1Impl implements OrderServiceV1 {
+
+    private final OrderRepositoryV1 orderRepository;
+
+    @Override
+    public void orderItem(final String itemId) {
+        orderRepository.save(itemId);
+    }
+}

스프링 로드맵5 고급편/proxy/src/main/java/hello/proxy/config/AppV1Config.java

@@ -0,0 +1,31 @@
+package hello.proxy.config;
+
+import hello.proxy.app.v1.OrderControllerV1;
+import hello.proxy.app.v1.OrderControllerV1Impl;
+import hello.proxy.app.v1.OrderRepositoryV1;
+import hello.proxy.app.v1.OrderRepositoryV1Impl;
+import hello.proxy.app.v1.OrderServiceV1;
+import hello.proxy.app.v1.OrderServiceV1Impl;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class AppV1Config {
+
+    /* Bean 수동 등록 */
+
+    @Bean
+    public OrderControllerV1 orderControllerV1() {
+        return new OrderControllerV1Impl(orderServiceV1());
+    }
+
+    @Bean
+    public OrderServiceV1 orderServiceV1() {
+        return new OrderServiceV1Impl(orderRepositoryV1());
+    }
+
+    @Bean
+    public OrderRepositoryV1 orderRepositoryV1() {
+        return new OrderRepositoryV1Impl();
+    }
+}