Proxy Pattern

design-pattern/src/Proxy/Application.java

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+package Proxy;
+
+public class Application {
+    public static void main(String[] args) {
+        Subject real = new RealSubject();
+        Subject proxy1 = new Proxy(real);
+        Subject proxy2 = new Proxy(real);
+        Subject proxy3 = new Proxy(real);
+
+        proxy1.action1();
+        proxy2.action1();
+        proxy3.action1();
+
+        proxy1.action2();
+        proxy2.action2();
+        proxy3.action2();
+    }
+}

design-pattern/src/Proxy/Proxy

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+Proxy Pattern
+ - 대리인 내세우기
+ - 프록시 패턴을 통해 작업을 나누어 구현

design-pattern/src/Proxy/Proxy.java

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+package Proxy;
+
+public class Proxy implements Subject{
+
+    private final Subject realSubject;
+
+    public Proxy(Subject realSubject) {
+        this.realSubject = realSubject;
+    }
+
+    @Override
+    public void action1() {
+        System.out.println("간단한 업무 by proxy");
+    }
+
+    @Override
+    public void action2() {
+        this.realSubject.action2();
+    }
+}

design-pattern/src/Proxy/RealSubject.java

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+package Proxy;
+
+public class RealSubject implements Subject{
+    @Override
+    public void action1() {
+        System.out.println("간단한 업무 by real");
+    }
+
+    @Override
+    public void action2() {
+        System.out.println("복잡한 업무 by real");
+    }
+}

design-pattern/src/Proxy/Subject.java

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+package Proxy;
+
+public interface Subject {
+
+    // 리소스가 적게 드는 일
+    void action1();
+    // 리소스가 많이 드는 일 - 네트워크 / 메모리
+    void action2();
+}