고급편/섹션4: 구체 클래스 기반 프록시 - 예제2 (#5)

섹션4: 프록시 패턴과 데코레이터 패턴

스프링 로드맵5 고급편/proxy/src/test/java/hello/proxy/pureproxy/concreteproxy/ConcreteProxyTest.java

@@ -2,6 +2,7 @@
 
 import hello.proxy.pureproxy.concreteproxy.code.ConcreteClient;
 import hello.proxy.pureproxy.concreteproxy.code.ConcreteLogic;
+import hello.proxy.pureproxy.concreteproxy.code.TimeProxy;
 import org.junit.jupiter.api.Test;
 
 public class ConcreteProxyTest {
@@ -12,4 +13,12 @@ void noProxy() {
         ConcreteClient concreteClient = new ConcreteClient(concreteLogic);
         concreteClient.execute();
     }
+
+    @Test
+    void addProxy() {
+        ConcreteLogic concreteLogic = new ConcreteLogic();
+        TimeProxy timeProxy = new TimeProxy(concreteLogic);
+        ConcreteClient concreteClient = new ConcreteClient(timeProxy);
+        concreteClient.execute();
+    }
 }

스프링 로드맵5 고급편/proxy/src/test/java/hello/proxy/pureproxy/concreteproxy/code/TimeProxy.java

@@ -0,0 +1,27 @@
+package hello.proxy.pureproxy.concreteproxy.code;
+
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class TimeProxy extends ConcreteLogic {
+
+    private ConcreteLogic concreteLogic;
+
+    public TimeProxy(final ConcreteLogic concreteLogic) {
+        this.concreteLogic = concreteLogic;
+    }
+
+    @Override
+    public String operation() {
+
+        log.info("TimeDecorator 실행");
+        long startTime = System.currentTimeMillis();
+
+        String result = concreteLogic.operation();
+        long endTime = System.currentTimeMillis();
+
+        long resultTime = endTime - startTime;
+        log.info("총 걸린 시간 = {}", resultTime);
+        return result;
+    }
+}