#108 Consistent package naming throughout the examples

front-controller/src/main/java/com/iluwatar/front/controller/App.java

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+package com.iluwatar.front.controller;
+
+/**
+ * 
+ * The Front Controller is a presentation tier pattern. Essentially it defines a
+ * controller that handles all requests for a web site.
+ * 
+ * The Front Controller pattern consolidates request handling through a single handler
+ * object (FrontController). This object can carry out the common the behavior such as
+ * authorization, request logging and routing requests to corresponding views.
+ * 
+ * Typically the requests are mapped to command objects (Command) which then display
+ * the correct view (View).
+ * 
+ * In this example we have implemented two views: ArcherView and CatapultView. These
+ * are displayed by sending correct request to the FrontController object. For example,
+ * the ArcherView gets displayed when FrontController receives request "Archer". When
+ * the request is unknown, we display the error view (ErrorView).
+ *
+ */
+public class App {
+	
+	public static void main(String[] args) {
+		FrontController controller = new FrontController();
+		controller.handleRequest("Archer");
+		controller.handleRequest("Catapult");
+		controller.handleRequest("foobar");
+	}
+}

front-controller/src/main/java/com/iluwatar/front/controller/ApplicationException.java

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+package com.iluwatar.front.controller;
+
+public class ApplicationException extends RuntimeException {
+
+    public ApplicationException(Throwable cause) {
+        super(cause);
+    }
+}

front-controller/src/main/java/com/iluwatar/front/controller/ArcherCommand.java

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+package com.iluwatar.front.controller;
+
+/**
+ * 
+ * Command for archers.
+ *
+ */
+public class ArcherCommand implements Command {
+
+	@Override
+	public void process() {
+		new ArcherView().display();
+	}
+}

front-controller/src/main/java/com/iluwatar/front/controller/ArcherView.java

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+package com.iluwatar.front.controller;
+
+/**
+ * 
+ * View for archers.
+ *
+ */
+public class ArcherView implements View {
+
+	@Override
+	public void display() {
+		System.out.println("Displaying archers");
+	}
+}

front-controller/src/main/java/com/iluwatar/front/controller/CatapultCommand.java

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+package com.iluwatar.front.controller;
+
+/**
+ * 
+ * Command for catapults.
+ *
+ */
+public class CatapultCommand implements Command {
+
+	@Override
+	public void process() {
+		new CatapultView().display();
+	}
+}

front-controller/src/main/java/com/iluwatar/front/controller/CatapultView.java

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+package com.iluwatar.front.controller;
+
+/**
+ * 
+ * View for catapults.
+ *
+ */
+public class CatapultView implements View {
+
+	@Override
+	public void display() {
+		System.out.println("Displaying catapults");
+	}
+}

front-controller/src/main/java/com/iluwatar/front/controller/Command.java

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+package com.iluwatar.front.controller;
+
+/**
+ * 
+ * Commands are the intermediary between requests and views.
+ *
+ */
+public interface Command {
+	
+	void process();
+}

front-controller/src/main/java/com/iluwatar/front/controller/ErrorView.java

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+package com.iluwatar.front.controller;
+
+/**
+ * 
+ * View for errors.
+ *
+ */
+public class ErrorView implements View {
+
+	@Override
+	public void display() {
+		System.out.println("Error 500");
+	}
+}

front-controller/src/main/java/com/iluwatar/front/controller/FrontController.java

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+package com.iluwatar.front.controller;
+
+/**
+ * 
+ * FrontController is the handler class that takes in all the requests and
+ * renders the correct response.
+ *
+ */
+public class FrontController {
+	
+	public void handleRequest(String request) {
+		Command command = getCommand(request);
+		command.process();
+	}
+	
+	private Command getCommand(String request) {
+		Class commandClass = getCommandClass(request);
+		try {
+			return (Command) commandClass.newInstance();
+		} catch (Exception e) {
+			throw new ApplicationException(e);
+		}
+	}
+	
+	private Class getCommandClass(String request) {
+		Class result;
+		try {
+			result = Class.forName("com.iluwatar." + request + "Command");
+		} catch (ClassNotFoundException e) {
+			result = UnknownCommand.class;
+		}
+		return result;
+	}
+}

front-controller/src/main/java/com/iluwatar/front/controller/UnknownCommand.java

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+package com.iluwatar.front.controller;
+
+/**
+ * 
+ * Default command in case the mapping is not successful.
+ *
+ */
+public class UnknownCommand implements Command {
+
+	@Override
+	public void process() {
+		new ErrorView().display();
+	}
+}

front-controller/src/main/java/com/iluwatar/front/controller/View.java

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+package com.iluwatar.front.controller;
+
+/**
+ * 
+ * Views are the representations rendered for the user.
+ *
+ */
+public interface View {
+
+	void display();
+}