added business delegate

Author: Catherine22

README_cn.md

@@ -58,8 +58,8 @@
   the License.
   ```
 
-[runoob.com]:<https://www.tutorialspoint.com/design_pattern/index.htm>
-[]:<http://www.runoob.com/design-pattern/design-pattern-tutorial.html>
+[tutorialspoint]:<https://www.tutorialspoint.com/design_pattern/index.htm>
+[runoob.com]:<http://www.runoob.com/design-pattern/design-pattern-tutorial.html>
 [English]:<https://github.com/Catherine22/DesignPattern/blob/master/README.md>
 [LazyInitializingSingleton]:<https://github.com/Catherine22/DesignPattern/blob/master/src/com/catherine/singleton/LazyInitializingSingleton.java>
 [SafeLazyInitializingSingleton]:<https://github.com/Catherine22/DesignPattern/blob/master/src/com/catherine/singleton/SafeLazyInitializingSingleton.java>

src/com/catherine/Main.java

@@ -13,6 +13,9 @@
 import com.catherine.builder.OldStyleRobotBuilder;
 import com.catherine.builder.Robot;
 import com.catherine.builder.RobotDirector;
+import com.catherine.business_delegate.BusinessDelegate;
+import com.catherine.business_delegate.Client;
+import com.catherine.business_delegate.ServiceType;
 import com.catherine.chain_of_responsibility.DebugLogger;
 import com.catherine.chain_of_responsibility.ErrorLogger;
 import com.catherine.chain_of_responsibility.Logger;
@@ -107,10 +110,21 @@ public static void main(String[] args) {
 		// testStrategy();
 		// testTemplate();
 		// testVisitor();
-		testMVC();
+		// testMVC();
+		testBusinessDelegate();
 
 	}
 
+	private static void testBusinessDelegate() {
+		BusinessDelegate bd = new BusinessDelegate(ServiceType.EJB);
+		Client client = new Client(bd);
+		client.createTask();
+
+		bd = new BusinessDelegate(ServiceType.JMS);
+		client = new Client(bd);
+		client.createTask();
+	}
+
 	private static void testMVC() {
 		RetrieveCouponFromDB rc = new RetrieveCouponFromDB();
 		rc.downloadCoupons();

src/com/catherine/business_delegate/BusinessDelegate.java

@@ -0,0 +1,23 @@
+package com.catherine.business_delegate;
+
+import com.catherine.business_delegate.ServiceType;
+
+/**
+ * 作为入口，用来访问BusinessService
+ * 
+ * @author Catherine
+ *
+ */
+public class BusinessDelegate {
+	private ServiceType type;
+
+	public BusinessDelegate(ServiceType type) {
+		this.type = type;
+	}
+
+	public void createTask() {
+		BusinessLookUp blu = new BusinessLookUp();
+		BusinessService service = blu.getBusinessService(type);
+		service.bindService();
+	}
+}

src/com/catherine/business_delegate/BusinessLookUp.java

@@ -0,0 +1,11 @@
+package com.catherine.business_delegate;
+
+public class BusinessLookUp {
+
+	public BusinessService getBusinessService(ServiceType type) {
+		if (type == ServiceType.EJB)
+			return new EJBService();
+		else
+			return new JMSService();
+	}
+}

src/com/catherine/business_delegate/BusinessService.java

@@ -0,0 +1,5 @@
+package com.catherine.business_delegate;
+
+public interface BusinessService {
+	public void bindService();
+}

src/com/catherine/business_delegate/Client.java

@@ -0,0 +1,13 @@
+package com.catherine.business_delegate;
+
+public class Client {
+	BusinessDelegate bd;
+
+	public Client(BusinessDelegate bd) {
+		this.bd = bd;
+	}
+
+	public void createTask() {
+		bd.createTask();
+	}
+}

src/com/catherine/business_delegate/EJBService.java

@@ -0,0 +1,11 @@
+package com.catherine.business_delegate;
+
+public class EJBService implements BusinessService {
+
+	@Override
+	public void bindService() {
+		System.out.println("bind EJBService");
+
+	}
+
+}

src/com/catherine/business_delegate/JMSService.java

@@ -0,0 +1,11 @@
+package com.catherine.business_delegate;
+
+public class JMSService implements BusinessService {
+
+	@Override
+	public void bindService() {
+		System.out.println("bind JMSService");
+
+	}
+
+}

src/com/catherine/business_delegate/ServiceType.java

@@ -0,0 +1,5 @@
+package com.catherine.business_delegate;
+
+public enum ServiceType {
+	EJB, JMS
+}