고급편/섹션4: 구체 클래스 기반 프록시 - 적용 (#5)

섹션4: 프록시 패턴과 데코레이터 패턴

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

@@ -2,6 +2,7 @@
 
 import hello.proxy.config.AppV1Config;
 import hello.proxy.config.AppV2Config;
+import hello.proxy.config.v1_proxy.concrete_proxy.ConcreteProxyConfig;
 import hello.proxy.config.v1_proxy.interface_proxy.InterfaceProxyConfig;
 import hello.proxy.trace.logtrace.LogTrace;
 import hello.proxy.trace.logtrace.ThreadLocalLogTrace;
@@ -12,7 +13,8 @@
 
 //@Import(AppV1Config.class)
 //@Import({AppV1Config.class, AppV2Config.class})
-@Import(InterfaceProxyConfig.class)
+//@Import(InterfaceProxyConfig.class)
+@Import(ConcreteProxyConfig.class)
 @SpringBootApplication(scanBasePackages = "hello.proxy.app")
 // 주의 config 하위 클래스 AppV1Config 등을 컴포넌트 스캔 대상에 두지 않기 위해 작업
 public class ProxyApplication {

스프링 로드맵5 고급편/proxy/src/main/java/hello/proxy/config/v1_proxy/concrete_proxy/ConcreteProxyConfig.java

@@ -0,0 +1,30 @@
+package hello.proxy.config.v1_proxy.concrete_proxy;
+
+import hello.proxy.app.v2.OrderControllerV2;
+import hello.proxy.app.v2.OrderRepositoryV2;
+import hello.proxy.app.v2.OrderServiceV2;
+import hello.proxy.trace.logtrace.LogTrace;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class ConcreteProxyConfig {
+
+    @Bean
+    public OrderControllerV2 orderControllerV2(LogTrace logTrace) {
+        OrderControllerV2 orderControllerImpl = new OrderControllerV2(orderServiceV2(logTrace));
+        return new OrderControllerConcreteProxy(orderControllerImpl, logTrace);
+    }
+
+    @Bean
+    public OrderServiceV2 orderServiceV2(LogTrace logTrace) {
+        OrderServiceV2 orderServiceImpl = new OrderServiceV2(orderRepositoryV2(logTrace));
+        return new OrderServiceConcreteProxy(orderServiceImpl, logTrace);
+    }
+
+    @Bean
+    public OrderRepositoryV2 orderRepositoryV2(LogTrace logTrace) {
+        OrderRepositoryV2 repositoryImpl = new OrderRepositoryV2();
+        return new OrderRepositoryConcreteProxy(repositoryImpl, logTrace);
+    }
+}

스프링 로드맵5 고급편/proxy/src/main/java/hello/proxy/config/v1_proxy/concrete_proxy/OrderControllerConcreteProxy.java

@@ -0,0 +1,38 @@
+package hello.proxy.config.v1_proxy.concrete_proxy;
+
+import hello.proxy.app.v2.OrderControllerV2;
+import hello.proxy.trace.TraceStatus;
+import hello.proxy.trace.logtrace.LogTrace;
+
+public class OrderControllerConcreteProxy extends OrderControllerV2 {
+
+    private final OrderControllerV2 target;
+    private final LogTrace logTrace;
+
+    public OrderControllerConcreteProxy(final OrderControllerV2 target, final LogTrace logTrace) {
+        super(null);
+        this.target = target;
+        this.logTrace = logTrace;
+    }
+
+    @Override
+    public String request(final String itemId) {
+        TraceStatus status = null;
+        try {
+            status = logTrace.begin("OrderController.request()");
+            // target 호출
+            String result = target.request("itemId");
+            logTrace.end(status);
+
+            return result;
+        } catch (Exception e) {
+            logTrace.exception(status, e);
+            throw e;
+        }
+    }
+
+    @Override
+    public String noLog() {
+        return target.noLog();
+    }
+}

스프링 로드맵5 고급편/proxy/src/main/java/hello/proxy/config/v1_proxy/concrete_proxy/OrderRepositoryConcreteProxy.java

@@ -0,0 +1,29 @@
+package hello.proxy.config.v1_proxy.concrete_proxy;
+
+import hello.proxy.app.v2.OrderRepositoryV2;
+import hello.proxy.trace.TraceStatus;
+import hello.proxy.trace.logtrace.LogTrace;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+@RequiredArgsConstructor
+public class OrderRepositoryConcreteProxy extends OrderRepositoryV2 {
+
+    private final OrderRepositoryV2 target;
+    private final LogTrace logTrace;
+    @Override
+    public void save(final String itemId) {
+        TraceStatus status = null;
+        try {
+            status = logTrace.begin("OrderRepository.request()");
+
+            // target 호출
+            target.save("itemId");
+
+            logTrace.end(status);
+        } catch (Exception e) {
+            logTrace.exception(status, e);
+        }
+    }
+}

스프링 로드맵5 고급편/proxy/src/main/java/hello/proxy/config/v1_proxy/concrete_proxy/OrderServiceConcreteProxy.java

@@ -0,0 +1,33 @@
+package hello.proxy.config.v1_proxy.concrete_proxy;
+
+import hello.proxy.app.v2.OrderServiceV2;
+import hello.proxy.trace.TraceStatus;
+import hello.proxy.trace.logtrace.LogTrace;
+
+public class OrderServiceConcreteProxy extends OrderServiceV2 {
+
+    private final OrderServiceV2 target;
+    private final LogTrace logTrace;
+
+
+    public OrderServiceConcreteProxy(final OrderServiceV2 target, final LogTrace logTrace) {
+        super(null);
+        this.target = target;
+        this.logTrace = logTrace;
+    }
+
+    @Override
+    public void orderItem(final String itemId) {
+        TraceStatus status = null;
+        try {
+            status = logTrace.begin("OrderService.orderItem()");
+
+            // target 호출
+            target.orderItem("itemId");
+
+            logTrace.end(status);
+        } catch (Exception e) {
+            logTrace.exception(status, e);
+        }
+    }
+}