spring core proxy : concrete proxy

spring-core/proxy/src/test/java/com/example/proxy/pureproxy/concreteproxy/ConcreteProxyTest.java

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+package com.example.proxy.pureproxy.concreteproxy;
+
+import com.example.proxy.pureproxy.concreteproxy.code.ConcreteClient;
+import com.example.proxy.pureproxy.concreteproxy.code.ConcreteLogic;
+import com.example.proxy.pureproxy.concreteproxy.code.TimeProxy;
+import org.junit.jupiter.api.Test;
+
+public class ConcreteProxyTest {
+
+    @Test
+    void noProxy() {
+        ConcreteLogic concreteLogic = new ConcreteLogic();
+        ConcreteClient client = new ConcreteClient(concreteLogic);
+        client.execute();
+    }
+
+    @Test
+    void addProxy() {
+        ConcreteLogic concreteLogic = new ConcreteLogic();
+        TimeProxy timeProxy = new TimeProxy(concreteLogic);
+        ConcreteClient client = new ConcreteClient(timeProxy);
+        client.execute();
+    }
+}

spring-core/proxy/src/test/java/com/example/proxy/pureproxy/concreteproxy/code/ConcreteClient.java

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+package com.example.proxy.pureproxy.concreteproxy.code;
+
+public class ConcreteClient {
+
+    private final ConcreteLogic concreteLogic;
+
+    public ConcreteClient(ConcreteLogic concreteLogic) {
+        this.concreteLogic = concreteLogic;
+    }
+
+    public void execute() {
+        concreteLogic.operation();
+    }
+}

spring-core/proxy/src/test/java/com/example/proxy/pureproxy/concreteproxy/code/ConcreteLogic.java

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+package com.example.proxy.pureproxy.concreteproxy.code;
+
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class ConcreteLogic {
+
+    public String operation() {
+        log.info("ConcreteLogic 실행");
+        return "data";
+    }
+}

spring-core/proxy/src/test/java/com/example/proxy/pureproxy/concreteproxy/code/TimeProxy.java

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+package com.example.proxy.pureproxy.concreteproxy.code;
+
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class TimeProxy extends ConcreteLogic {
+
+    private final ConcreteLogic concreteLogic;
+
+    public TimeProxy(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("TimeDecorator 종료 resultTime={}", resultTime);
+        return result;
+    }
+}