Merge pull request #657 from christian-raedel/craedel-enterprise-patterns/front-controller

BAEL-305: enterprise patterns/front controller

enterprise-patterns/front-controller-pattern/pom.xml

@@ -31,7 +31,11 @@
             <plugin>
                 <groupId>org.eclipse.jetty</groupId>
                 <artifactId>jetty-maven-plugin</artifactId>
+<<<<<<< HEAD
+                <version>9.3.11.v20160721</version>
+=======
                 <version>9.4.0.M1</version>
+>>>>>>> upstream/master
                 <configuration>
                     <webApp>
                         <contextPath>/front-controller</contextPath>

enterprise-patterns/front-controller-pattern/src/main/java/com/baeldung/enterprise/patterns/front/controller/FrontControllerServlet.java

@@ -22,24 +22,17 @@ public class FrontControllerServlet extends HttpServlet {
 
     private FrontCommand getCommand(HttpServletRequest request) {
         try {
-            return (FrontCommand) getCommandClass(request)
-              .asSubclass(FrontCommand.class)
-              .newInstance();
-        } catch (Exception e) {
-            throw new RuntimeException("Failed to get command!", e);
-        }
-    }
-
-    private Class getCommandClass(HttpServletRequest request) {
-        try {
-            return Class.forName(
+            Class type = Class.forName(
               String.format(
                 "com.baeldung.enterprise.patterns.front.controller.commands.%sCommand",
                 request.getParameter("command")
               )
             );
-        } catch (ClassNotFoundException e) {
-            return UnknownCommand.class;
+            return (FrontCommand) type
+              .asSubclass(FrontCommand.class)
+              .newInstance();
+        } catch (Exception e) {
+            return new UnknownCommand();
         }
     }
 }

enterprise-patterns/front-controller-pattern/src/main/java/com/baeldung/enterprise/patterns/front/controller/data/Book.java

@@ -1,40 +1,15 @@
 package com.baeldung.enterprise.patterns.front.controller.data;
 
-public class Book {
-    private String author;
-    private String title;
-    private Double price;
+public interface Book {
+    String getAuthor();
 
-    public Book() {
-    }
+    void setAuthor(String author);
 
-    public Book(String author, String title, Double price) {
-        this.author = author;
-        this.title = title;
-        this.price = price;
-    }
+    String getTitle();
 
-    public String getAuthor() {
-        return author;
-    }
+    void setTitle(String title);
 
-    public void setAuthor(String author) {
-        this.author = author;
-    }
+    Double getPrice();
 
-    public String getTitle() {
-        return title;
-    }
-
-    public void setTitle(String title) {
-        this.title = title;
-    }
-
-    public Double getPrice() {
-        return price;
-    }
-
-    public void setPrice(Double price) {
-        this.price = price;
-    }
+    void setPrice(Double price);
 }

enterprise-patterns/front-controller-pattern/src/main/java/com/baeldung/enterprise/patterns/front/controller/data/BookImpl.java

@@ -0,0 +1,46 @@
+package com.baeldung.enterprise.patterns.front.controller.data;
+
+public class BookImpl implements Book {
+    private String author;
+    private String title;
+    private Double price;
+
+    public BookImpl() {
+    }
+
+    public BookImpl(String author, String title, Double price) {
+        this.author = author;
+        this.title = title;
+        this.price = price;
+    }
+
+    @Override
+    public String getAuthor() {
+        return author;
+    }
+
+    @Override
+    public void setAuthor(String author) {
+        this.author = author;
+    }
+
+    @Override
+    public String getTitle() {
+        return title;
+    }
+
+    @Override
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    @Override
+    public Double getPrice() {
+        return price;
+    }
+
+    @Override
+    public void setPrice(Double price) {
+        this.price = price;
+    }
+}

enterprise-patterns/front-controller-pattern/src/main/java/com/baeldung/enterprise/patterns/front/controller/data/Bookshelf.java

@@ -3,8 +3,8 @@ package com.baeldung.enterprise.patterns.front.controller.data;
 public interface Bookshelf {
 
     default void init() {
-        add(new Book("Wilson, Robert Anton & Shea, Robert", "Illuminati", 9.99));
-        add(new Book("Fowler, Martin", "Patterns of Enterprise Application Architecture", 27.88));
+        add(new BookImpl("Wilson, Robert Anton & Shea, Robert", "Illuminati", 9.99));
+        add(new BookImpl("Fowler, Martin", "Patterns of Enterprise Application Architecture", 27.88));
     }
 
     Bookshelf getInstance();