new pattern: Issue#1264: Implemented Composite-View Pattern (#1923)

* initial commit, created package, README, pom, and directory structure.

* Issue#1264, continue working on JavaBeans, added getters, setters, and private fields. Created test file for JavaBeans.

* set up junit for tests folder.

* Issue#1264, set up local server and added web-application framework to composite-view to allow the JSP to run on a local Tomcat container. Wrote unit tests for Java-bean class, working on JSP pages.

* Issue#1264, Added forwarding functionality to servlet and main composite view page.

* Issue#1264, Finished composite view template in newsDisplay.jsp and created atomic sub-view components in businessNews.jsp, header.jsp, localNews.jsp, scienceNews.jsp, sportsNews.jsp, worldNews.jsp. Composite view page renders correctly, atomic views are inserted in and substituted in the template page depending on request parameters.

* Issue#1264, Added all views, updated README.md with documentation.

* Issue#1264, updated README.md, moved images folder into etc folder.

* Issue#1264, removed build artifacts from tracked files.

* Issue#1264, updated README.md

* Issue#1264, updated README.md

* Issue#1264, removed unused import, made AppServlet class final, changed to .equals() for string comparison.

* Issue#1264, in AppServlet, put the output writing into try blocks to ensure writers are closed.

* Issue#1264, added tests for Servlet, coverage up to 100%, used lombok to reduce boilerplate setters and getter, updated README.md with better grammar, appropriate tags and links to related patterns. Updated pom.xml to get rid of superfluous lines.

* Issue#1264, made changes as requested in README.md.

Co-authored-by: Ilkka Seppälä <iluwatar@users.noreply.github.com>

composite-view/README.md

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+---
+layout: pattern
+title: Composite View 
+folder: composite-view
+permalink: /patterns/composite-view/
+categories: Structural
+language: en
+tags:
+- Enterprise Integration Pattern
+- Presentation
+---
+
+## Name
+**Composite View**
+
+## Intent
+The purpose of the Composite View Pattern is to increase re-usability and flexibility when creating views for websites/webapps. 
+This pattern seeks to decouple the content of the page from its layout, allowing changes to be made to either the content
+or layout of the page without impacting the other. This pattern also allows content to be easily reused across different views easily.
+
+## Explanation
+Real World Example
+> A news site wants to display the current date and news to different users
+> based on that user's preferences. The news site will substitute in different news feed
+> components depending on the user's interest, defaulting to local news.
+
+In Plain Words
+> Composite View Pattern is having a main view being composed of smaller subviews.
+> The layout of this composite view is based on a template. A View-manager then decides which
+> subviews to include in this template.
+
+Wikipedia Says
+> Composite views that are composed of multiple atomic subviews. Each component of 
+> the template may be included dynamically into the whole and the layout of the page may be managed independently of the content.
+> This solution provides for the creation of a composite view based on the inclusion and substitution of 
+> modular dynamic and static template fragments. 
+> It promotes the reuse of atomic portions of the view by encouraging modular design.
+
+**Programmatic Example**
+
+Since this is a web development pattern, a server is required to demonstrate it.
+This example uses Tomcat 10.0.13 to run the servlet, and this programmatic example will only work with Tomcat 10+.
+
+Firstly there is `AppServlet` which is an `HttpServlet` that runs on Tomcat 10+.
+```java
+public class AppServlet extends HttpServlet {
+  private String msgPartOne = "<h1>This Server Doesn't Support";
+  private String msgPartTwo = "Requests</h1>\n"
+      + "<h2>Use a GET request with boolean values for the following parameters<h2>\n"
+      + "<h3>'name'</h3>\n<h3>'bus'</h3>\n<h3>'sports'</h3>\n<h3>'sci'</h3>\n<h3>'world'</h3>";
+
+  private String destination = "newsDisplay.jsp";
+
+  public AppServlet() {
+
+  }
+
+  @Override
+  public void doGet(HttpServletRequest req, HttpServletResponse resp)
+          throws ServletException, IOException {
+    RequestDispatcher requestDispatcher = req.getRequestDispatcher(destination);
+    ClientPropertiesBean reqParams = new ClientPropertiesBean(req);
+    req.setAttribute("properties", reqParams);
+    requestDispatcher.forward(req, resp);
+  }
+
+  @Override
+  public void doPost(HttpServletRequest req, HttpServletResponse resp)
+          throws ServletException, IOException {
+    resp.setContentType("text/html");
+    PrintWriter out = resp.getWriter();
+    out.println(msgPartOne + " Post " + msgPartTwo);
+
+  }
+
+  @Override
+  public void doDelete(HttpServletRequest req, HttpServletResponse resp)
+          throws ServletException, IOException {
+    resp.setContentType("text/html");
+    PrintWriter out = resp.getWriter();
+    out.println(msgPartOne + " Delete " + msgPartTwo);
+
+  }
+
+  @Override
+  public void doPut(HttpServletRequest req, HttpServletResponse resp)
+          throws ServletException, IOException {
+    resp.setContentType("text/html");
+    PrintWriter out = resp.getWriter();
+    out.println(msgPartOne + " Put " + msgPartTwo);
+
+  }
+}
+
+```
+This servlet is not part of the pattern, and simply forwards GET requests to the correct JSP.
+PUT, POST, and DELETE requests are not supported and will simply show an error message.
+
+The view management in this example is done via a javabean class: `ClientPropertiesBean`, which stores user preferences.
+```java
+public class ClientPropertiesBean implements Serializable {
+
+  private static final String WORLD_PARAM = "world";
+  private static final String SCIENCE_PARAM = "sci";
+  private static final String SPORTS_PARAM = "sport";
+  private static final String BUSINESS_PARAM = "bus";
+  private static final String NAME_PARAM = "name";
+
+  private static final String DEFAULT_NAME = "DEFAULT_NAME";
+  private boolean worldNewsInterest;
+  private boolean sportsInterest;
+  private boolean businessInterest;
+  private boolean scienceNewsInterest;
+  private String name;
+  
+  public ClientPropertiesBean() {
+    worldNewsInterest = true;
+    sportsInterest = true;
+    businessInterest = true;
+    scienceNewsInterest = true;
+    name = DEFAULT_NAME;
+
+  }
+  
+  public ClientPropertiesBean(HttpServletRequest req) {
+    worldNewsInterest = Boolean.parseBoolean(req.getParameter(WORLD_PARAM));
+    sportsInterest = Boolean.parseBoolean(req.getParameter(SPORTS_PARAM));
+    businessInterest = Boolean.parseBoolean(req.getParameter(BUSINESS_PARAM));
+    scienceNewsInterest = Boolean.parseBoolean(req.getParameter(SCIENCE_PARAM));
+    String tempName = req.getParameter(NAME_PARAM);
+    if (tempName == null || tempName == "") {
+      tempName = DEFAULT_NAME;
+    }
+    name = tempName;
+  }
+  // getters and setters generated by Lombok 
+}
+```
+This javabean has a default constructor, and another that takes an `HttpServletRequest`.
+This second constructor takes the request object, parses out the request parameters which contain the
+user preferences for different types of news.
+
+The template for the news page is in `newsDisplay.jsp`
+```html
+<html>
+<head>
+    <style>
+        h1 { text-align: center;}
+        h2 { text-align: center;}
+        h3 { text-align: center;}
+        .centerTable {
+            margin-left: auto;
+            margin-right: auto;
+        }
+        table {border: 1px solid black;}
+        tr {text-align: center;}
+        td {text-align: center;}
+    </style>
+</head>
+<body>
+    <%ClientPropertiesBean propertiesBean = (ClientPropertiesBean) request.getAttribute("properties");%>
+    <h1>Welcome <%= propertiesBean.getName()%></h1>
+    <jsp:include page="header.jsp"></jsp:include>
+    <table class="centerTable">
+
+        <tr>
+            <td></td>
+            <% if(propertiesBean.isWorldNewsInterest()) { %>
+                <td><%@include file="worldNews.jsp"%></td>
+            <% } else { %>
+                <td><%@include file="localNews.jsp"%></td>
+            <% } %>
+            <td></td>
+        </tr>
+        <tr>
+            <% if(propertiesBean.isBusinessInterest()) { %>
+                <td><%@include file="businessNews.jsp"%></td>
+            <% } else { %>
+                <td><%@include file="localNews.jsp"%></td>
+            <% } %>
+            <td></td>
+            <% if(propertiesBean.isSportsInterest()) { %>
+                <td><%@include file="sportsNews.jsp"%></td>
+            <% } else { %>
+                <td><%@include file="localNews.jsp"%></td>
+            <% } %>
+        </tr>
+        <tr>
+            <td></td>
+            <% if(propertiesBean.isScienceNewsInterest()) { %>
+                <td><%@include file="scienceNews.jsp"%></td>
+            <% } else { %>
+                <td><%@include file="localNews.jsp"%></td>
+            <% } %>
+            <td></td>
+        </tr>
+    </table>
+</body>
+</html>
+```
+This JSP page is the template. It declares a table with three rows, with one component in the first row,
+two components in the second row, and one component in the third row. 
+
+The scriplets in the file are part of the
+view management strategy that include different atomic subviews based on the user preferences in the Javabean.
+
+Here are two examples of the mock atomic subviews used in the composite:
+`businessNews.jsp`
+```html
+<html>
+    <head>
+        <style>
+            h2 { text-align: center;}
+            table {border: 1px solid black;}
+            tr {text-align: center;}
+            td {text-align: center;}
+        </style>
+    </head>
+    <body>
+        <h2>
+            Generic Business News
+        </h2>
+        <table style="margin-right: auto; margin-left: auto">
+            <tr>
+                <td>Stock prices up across the world</td>
+                <td>New tech companies to invest in</td>
+            </tr>
+            <tr>
+                <td>Industry leaders unveil new project</td>
+                <td>Price fluctuations and what they mean</td>
+            </tr>
+        </table>
+    </body>
+</html>
+```
+`localNews.jsp`
+```html
+<html>
+    <body>
+        <div style="text-align: center">
+            <h3>
+                Generic Local News
+            </h3>
+            <ul style="list-style-type: none">
+                <li>
+                    Mayoral elections coming up in 2 weeks
+                </li>
+                <li>
+                    New parking meter rates downtown coming tomorrow
+                </li>
+                <li>
+                    Park renovations to finish by the next year
+                </li>
+                <li>
+                    Annual marathon sign ups available online
+                </li>
+            </ul>
+        </div>
+    </body>
+</html>
+```
+The results are as such:
+
+1) The user has put their name as `Tammy` in the request parameters and no preferences: 
+![alt text](etc/images/noparam.PNG)
+2) The user has put their name as `Johnny` in the request parameters and has a preference for world, business, and science news:
+![alt text](etc/images/threeparams.PNG)
+
+The different subviews such as `worldNews.jsp`, `businessNews.jsp`, etc. are included conditionally
+based on the request parameters.
+
+**How To Use**
+
+To try this example, make sure you have Tomcat 10+ installed.
+Set up your IDE to build a WAR file from the module and deploy that file to the server
+
+IntelliJ:
+
+Under `Run` and `edit configurations` Make sure Tomcat server is one of the run configurations. 
+Go to the deployment tab, and make sure there is one artifact being built called `composite-view:war exploded`. 
+If not present, add one.
+
+Ensure that the artifact is being built from the content of the `web` directory and the compilation results of the module.
+Point the output of the artifact to a convenient place. Run the configuration and view the landing page, 
+follow instructions on that page to continue.
+
+## Class diagram
+
+![alt text](./etc/composite_view.png)
+
+The class diagram here displays the Javabean which is the view manager.
+The views are JSP's held inside the web directory.
+
+## Applicability
+
+This pattern is applicable to most websites that require content to be displayed dynamically/conditionally.
+If there are components that need to be re-used for multiple views, or if the project requires reusing a template, 
+or if it needs to include content depending on certain conditions, then this pattern is a good choice.
+
+## Known uses
+
+Most modern websites use composite views in some shape or form, as they have templates for views and small atomic components
+that are included in the page dynamically. Most modern Javascript libraries, like React, support this design pattern 
+with components.
+
+## Consequences
+**Pros**
+* Easy to re-use components
+* Change layout/content without affecting the other
+* Reduce code duplication
+* Code is more maintainable and modular
+
+**Cons**
+* Overhead cost at runtime
+* Slower response compared to directly embedding elements
+* Increases potential for display errors 
+
+## Related patterns
+* [Composite (GoF)](https://java-design-patterns.com/patterns/composite/)
+* [View Helper](https://www.oracle.com/java/technologies/viewhelper.html)
+
+## Credits
+* [Core J2EE Patterns - Composite View](https://www.oracle.com/java/technologies/composite-view.html)
+* [Composite View Design Pattern – Core J2EE Patterns](https://www.dineshonjava.com/composite-view-design-pattern/)
+

composite-view/etc/composite-view.urm.puml

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+@startuml
+package com.iluwatar.compositeview {
+  class ClientPropertiesBean {
+    - BUSINESS_PARAM : String {static}
+    - DEFAULT_NAME : String {static}
+    - NAME_PARAM : String {static}
+    - SCIENCE_PARAM : String {static}
+    - SPORTS_PARAM : String {static}
+    - WORLD_PARAM : String {static}
+    - businessInterest : boolean
+    - name : String
+    - scienceNewsInterest : boolean
+    - sportsInterest : boolean
+    - worldNewsInterest : boolean
+    + ClientPropertiesBean()
+    + ClientPropertiesBean(req : HttpServletRequest)
+    + getName() : String
+    + isBusinessInterest() : boolean
+    + isScienceNewsInterest() : boolean
+    + isSportsInterest() : boolean
+    + isWorldNewsInterest() : boolean
+    + setBusinessInterest(businessInterest : boolean)
+    + setName(name : String)
+    + setScienceNewsInterest(scienceNewsInterest : boolean)
+    + setSportsInterest(sportsInterest : boolean)
+    + setWorldNewsInterest(worldNewsInterest : boolean)
+  }
+}
+@enduml

composite-view/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    The MIT License
+    Copyright © 2014-2021 Ilkka Seppälä
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+    THE SOFTWARE.
+
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>java-design-patterns</artifactId>
+        <groupId>com.iluwatar</groupId>
+        <version>1.26.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>composite-view</artifactId>
+    <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>jakarta.servlet</groupId>
+            <artifactId>jakarta.servlet-api</artifactId>
+            <version>5.0.0</version>
+            <scope>compile</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-core</artifactId>
+            <version>4.1.0</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <configuration>
+                            <archive>
+                                <manifest>
+                                    <mainClass>com.iluwatar.compositeview.App</mainClass>
+                                </manifest>
+                            </archive>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

composite-view/src/main/java/com/iluwatar/compositeview/AppServlet.java

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+package com.iluwatar.compositeview;
+
+import jakarta.servlet.RequestDispatcher;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.PrintWriter;
+
+/**
+ * A servlet object that extends HttpServlet.
+ * Runs on Tomcat 10 and handles Http requests
+ */
+
+public final class AppServlet extends HttpServlet {
+  private String msgPartOne = "<h1>This Server Doesn't Support";
+  private String msgPartTwo = "Requests</h1>\n"
+      + "<h2>Use a GET request with boolean values for the following parameters<h2>\n"
+      + "<h3>'name'</h3>\n<h3>'bus'</h3>\n<h3>'sports'</h3>\n<h3>'sci'</h3>\n<h3>'world'</h3>";
+
+  private String destination = "newsDisplay.jsp";
+
+  public AppServlet() {
+
+  }
+
+  @Override
+  public void doGet(HttpServletRequest req, HttpServletResponse resp)
+          throws ServletException, IOException {
+    RequestDispatcher requestDispatcher = req.getRequestDispatcher(destination);
+    ClientPropertiesBean reqParams = new ClientPropertiesBean(req);
+    req.setAttribute("properties", reqParams);
+    requestDispatcher.forward(req, resp);
+  }
+
+  @Override
+  public void doPost(HttpServletRequest req, HttpServletResponse resp)
+          throws ServletException, IOException {
+    resp.setContentType("text/html");
+    try (PrintWriter out = resp.getWriter()) {
+      out.println(msgPartOne + " Post " + msgPartTwo);
+    }
+
+  }
+
+  @Override
+  public void doDelete(HttpServletRequest req, HttpServletResponse resp)
+          throws ServletException, IOException {
+    resp.setContentType("text/html");
+    try (PrintWriter out = resp.getWriter()) {
+      out.println(msgPartOne + " Delete " + msgPartTwo);
+    }
+  }
+
+  @Override
+  public void doPut(HttpServletRequest req, HttpServletResponse resp)
+          throws ServletException, IOException {
+    resp.setContentType("text/html");
+    try (PrintWriter out = resp.getWriter()) {
+      out.println(msgPartOne + " Put " + msgPartTwo);
+    }
+  }
+}

composite-view/src/main/java/com/iluwatar/compositeview/ClientPropertiesBean.java

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+package com.iluwatar.compositeview;
+
+import jakarta.servlet.http.HttpServletRequest;
+import java.io.Serializable;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+
+/**
+ * A Java beans class that parses a http request and stores parameters.
+ * Java beans used in JSP's to dynamically include elements in view.
+ * DEFAULT_NAME = a constant, default name to be used for the default constructor
+ * worldNewsInterest = whether current request has world news interest
+ * sportsInterest = whether current request has a sportsInterest
+ * businessInterest = whether current request has a businessInterest
+ * scienceNewsInterest = whether current request has a scienceNewsInterest
+ */
+@Getter
+@Setter
+@NoArgsConstructor
+public class ClientPropertiesBean implements Serializable {
+
+  private static final String WORLD_PARAM = "world";
+  private static final String SCIENCE_PARAM = "sci";
+  private static final String SPORTS_PARAM = "sport";
+  private static final String BUSINESS_PARAM = "bus";
+  private static final String NAME_PARAM = "name";
+
+  private static final  String DEFAULT_NAME = "DEFAULT_NAME";
+  private boolean worldNewsInterest = true;
+  private boolean sportsInterest = true;
+  private boolean businessInterest = true;
+  private boolean scienceNewsInterest = true;
+  private String name = DEFAULT_NAME;
+
+  /**
+   * Constructor that parses an HttpServletRequest and stores all the request parameters.
+   *
+   * @param req the HttpServletRequest object that is passed in
+   */
+  public ClientPropertiesBean(HttpServletRequest req) {
+    worldNewsInterest = Boolean.parseBoolean(req.getParameter(WORLD_PARAM));
+    sportsInterest = Boolean.parseBoolean(req.getParameter(SPORTS_PARAM));
+    businessInterest = Boolean.parseBoolean(req.getParameter(BUSINESS_PARAM));
+    scienceNewsInterest = Boolean.parseBoolean(req.getParameter(SCIENCE_PARAM));
+    String tempName = req.getParameter(NAME_PARAM);
+    if (tempName == null || tempName.equals("")) {
+      tempName = DEFAULT_NAME;
+    }
+    name = tempName;
+  }
+}

composite-view/src/test/java/com/iluwatar/compositeview/AppServletTest.java

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+package com.iluwatar.compositeview;
+
+import jakarta.servlet.RequestDispatcher;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+
+import java.io.PrintWriter;
+import java.io.StringWriter;
+
+import static org.junit.Assert.*;
+
+/* Written with reference from https://stackoverflow.com/questions/5434419/how-to-test-my-servlet-using-junit
+and https://stackoverflow.com/questions/50211433/servlets-unit-testing
+ */
+
+public class AppServletTest extends Mockito{
+  private String msgPartOne = "<h1>This Server Doesn't Support";
+  private String msgPartTwo = "Requests</h1>\n"
+      + "<h2>Use a GET request with boolean values for the following parameters<h2>\n"
+      + "<h3>'name'</h3>\n<h3>'bus'</h3>\n<h3>'sports'</h3>\n<h3>'sci'</h3>\n<h3>'world'</h3>";
+  private String destination = "newsDisplay.jsp";
+
+  @Test
+  public void testDoGet() throws Exception {
+    HttpServletRequest mockReq = Mockito.mock(HttpServletRequest.class);
+    HttpServletResponse mockResp = Mockito.mock(HttpServletResponse.class);
+    RequestDispatcher mockDispatcher = Mockito.mock(RequestDispatcher.class);
+    StringWriter stringWriter = new StringWriter();
+    PrintWriter printWriter = new PrintWriter(stringWriter);
+    when(mockResp.getWriter()).thenReturn(printWriter);
+    when(mockReq.getRequestDispatcher(destination)).thenReturn(mockDispatcher);
+    AppServlet curServlet = new AppServlet();
+    curServlet.doGet(mockReq, mockResp);
+    verify(mockReq, times(1)).getRequestDispatcher(destination);
+    verify(mockDispatcher).forward(mockReq, mockResp);
+
+
+  }
+
+  @Test
+  public void testDoPost() throws Exception {
+    HttpServletRequest mockReq = Mockito.mock(HttpServletRequest.class);
+    HttpServletResponse mockResp = Mockito.mock(HttpServletResponse.class);
+    StringWriter stringWriter = new StringWriter();
+    PrintWriter printWriter = new PrintWriter(stringWriter);
+    when(mockResp.getWriter()).thenReturn(printWriter);
+
+    AppServlet curServlet = new AppServlet();
+    curServlet.doPost(mockReq, mockResp);
+    printWriter.flush();
+    assertTrue(stringWriter.toString().contains(msgPartOne + " Post " + msgPartTwo));
+  }
+
+  @Test
+  public void testDoPut() throws Exception {
+    HttpServletRequest mockReq = Mockito.mock(HttpServletRequest.class);
+    HttpServletResponse mockResp = Mockito.mock(HttpServletResponse.class);
+    StringWriter stringWriter = new StringWriter();
+    PrintWriter printWriter = new PrintWriter(stringWriter);
+    when(mockResp.getWriter()).thenReturn(printWriter);
+
+    AppServlet curServlet = new AppServlet();
+    curServlet.doPut(mockReq, mockResp);
+    printWriter.flush();
+    assertTrue(stringWriter.toString().contains(msgPartOne + " Put " + msgPartTwo));
+  }
+
+  @Test
+  public void testDoDelete() throws Exception {
+    HttpServletRequest mockReq = Mockito.mock(HttpServletRequest.class);
+    HttpServletResponse mockResp = Mockito.mock(HttpServletResponse.class);
+    StringWriter stringWriter = new StringWriter();
+    PrintWriter printWriter = new PrintWriter(stringWriter);
+    when(mockResp.getWriter()).thenReturn(printWriter);
+
+    AppServlet curServlet = new AppServlet();
+    curServlet.doDelete(mockReq, mockResp);
+    printWriter.flush();
+    assertTrue(stringWriter.toString().contains(msgPartOne + " Delete " + msgPartTwo));
+  }
+}

composite-view/src/test/java/com/iluwatar/compositeview/JavaBeansTest.java

@@ -0,0 +1,71 @@
+package com.iluwatar.compositeview;
+
+import jakarta.servlet.http.HttpServletRequest;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+
+import static org.junit.Assert.*;
+
+public class JavaBeansTest {
+    @Test
+    public void testDefaultConstructor() {
+        ClientPropertiesBean newBean = new ClientPropertiesBean();
+        assertEquals("DEFAULT_NAME", newBean.getName());
+        assertTrue(newBean.isBusinessInterest());
+        assertTrue(newBean.isScienceNewsInterest());
+        assertTrue(newBean.isSportsInterest());
+        assertTrue(newBean.isWorldNewsInterest());
+
+    }
+
+    @Test
+    public void testNameGetterSetter() {
+        ClientPropertiesBean newBean = new ClientPropertiesBean();
+        assertEquals("DEFAULT_NAME", newBean.getName());
+        newBean.setName("TEST_NAME_ONE");
+        assertEquals("TEST_NAME_ONE", newBean.getName());
+    }
+
+    @Test
+    public void testBusinessSetterGetter() {
+        ClientPropertiesBean newBean = new ClientPropertiesBean();
+        assertTrue(newBean.isBusinessInterest());
+        newBean.setBusinessInterest(false);
+        assertFalse(newBean.isBusinessInterest());
+    }
+
+    @Test
+    public void testScienceSetterGetter() {
+        ClientPropertiesBean newBean = new ClientPropertiesBean();
+        assertTrue(newBean.isScienceNewsInterest());
+        newBean.setScienceNewsInterest(false);
+        assertFalse(newBean.isScienceNewsInterest());
+    }
+
+    @Test
+    public void testSportsSetterGetter() {
+        ClientPropertiesBean newBean = new ClientPropertiesBean();
+        assertTrue(newBean.isSportsInterest());
+        newBean.setSportsInterest(false);
+        assertFalse(newBean.isSportsInterest());
+    }
+
+    @Test
+    public void testWorldSetterGetter() {
+        ClientPropertiesBean newBean = new ClientPropertiesBean();
+        assertTrue(newBean.isWorldNewsInterest());
+        newBean.setWorldNewsInterest(false);
+        assertFalse(newBean.isWorldNewsInterest());
+    }
+
+    @Test
+    public void testRequestConstructor(){
+        HttpServletRequest mockReq = Mockito.mock(HttpServletRequest.class);
+        ClientPropertiesBean newBean = new ClientPropertiesBean((mockReq));
+        assertEquals("DEFAULT_NAME", newBean.getName());
+        assertFalse(newBean.isWorldNewsInterest());
+        assertFalse(newBean.isBusinessInterest());
+        assertFalse(newBean.isScienceNewsInterest());
+        assertFalse(newBean.isSportsInterest());
+    }
+}

composite-view/web/WEB-INF/web.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
+         version="4.0">
+    <servlet>
+        <servlet-name>appServlet</servlet-name>
+        <servlet-class>com.iluwatar.compositeview.AppServlet</servlet-class>
+    </servlet>
+    <servlet-mapping>
+        <servlet-name>appServlet</servlet-name>
+        <url-pattern>/news</url-pattern>
+    </servlet-mapping>
+</web-app>

composite-view/web/businessNews.jsp

@@ -0,0 +1,33 @@
+<%--
+  Created by IntelliJ IDEA.
+  User: Kevin
+  Date: 11/29/2021
+  Time: 2:51 PM
+  To change this template use File | Settings | File Templates.
+--%>
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+    <head>
+        <style>
+            h2 { text-align: center;}
+            table {border: 1px solid black;}
+            tr {text-align: center;}
+            td {text-align: center;}
+        </style>
+    </head>
+    <body>
+        <h2>
+            Generic Business News
+        </h2>
+        <table style="margin-right: auto; margin-left: auto">
+            <tr>
+                <td>Stock prices up across the world</td>
+                <td>New tech companies to invest in</td>
+            </tr>
+            <tr>
+                <td>Industry leaders unveil new project</td>
+                <td>Price fluctuations and what they mean</td>
+            </tr>
+        </table>
+    </body>
+</html>

composite-view/web/header.jsp

@@ -0,0 +1,23 @@
+<%--
+  Created by IntelliJ IDEA.
+  User: Kevin
+  Date: 11/29/2021
+  Time: 1:28 PM
+  To change this template use File | Settings | File Templates.
+--%>
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<%@ page import="java.util.Date"%>
+<html>
+<head>
+    <style>
+        h1 { text-align: center;}
+        h2 { text-align: center;}
+        h3 { text-align: center;}
+    </style>
+</head>
+<body>
+    <% String todayDateStr = (new Date().toString()); %>
+    <h1>Today's Personalized Frontpage</h1>
+    <h2><%=todayDateStr%></h2>
+</body>
+</html>

composite-view/web/index.jsp

@@ -0,0 +1,20 @@
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+  <head>
+    <style>
+      h1 { text-align: center;}
+      h2 { text-align: center;}
+      h3 { text-align: center;}
+    </style>
+  </head>
+  <body>
+    <h1>Welcome To The Composite Patterns Mock News Site</h1>
+    <h2>Send a GET request to the "/news" path to see the composite view with mock news</h2>
+    <h2>Use the following parameters:</h2>
+    <h3>name: string name to be dynamically displayed</h3>
+    <h3>bus: boolean for whether you want to see the mock business news</h3>
+    <h3>world: boolean for whether you want to see the mock world news</h3>
+    <h3>sci: boolean for whether you want to see the mock world news</h3>
+    <h3>sport: boolean for whether you want to see the mock world news</h3>
+  </body>
+</html>

composite-view/web/localNews.jsp

@@ -0,0 +1,25 @@
+
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+    <body>
+        <div style="text-align: center">
+            <h3>
+                Generic Local News
+            </h3>
+            <ul style="list-style-type: none">
+                <li>
+                    Mayoral elections coming up in 2 weeks
+                </li>
+                <li>
+                    New parking meter rates downtown coming tomorrow
+                </li>
+                <li>
+                    Park renovations to finish by the next year
+                </li>
+                <li>
+                    Annual marathon sign ups available online
+                </li>
+            </ul>
+        </div>
+    </body>
+</html>

composite-view/web/newsDisplay.jsp

@@ -0,0 +1,57 @@
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<%@ page import="com.iluwatar.compositeview.ClientPropertiesBean"%>
+<html>
+<head>
+    <style>
+        h1 { text-align: center;}
+        h2 { text-align: center;}
+        h3 { text-align: center;}
+        .centerTable {
+            margin-left: auto;
+            margin-right: auto;
+        }
+        table {border: 1px solid black;}
+        tr {text-align: center;}
+        td {text-align: center;}
+    </style>
+</head>
+<body>
+    <%ClientPropertiesBean propertiesBean = (ClientPropertiesBean) request.getAttribute("properties");%>
+    <h1>Welcome <%= propertiesBean.getName()%></h1>
+    <jsp:include page="header.jsp"></jsp:include>
+    <table class="centerTable">
+
+        <tr>
+            <td></td>
+            <% if(propertiesBean.isWorldNewsInterest()) { %>
+                <td><%@include file="worldNews.jsp"%></td>
+            <% } else { %>
+                <td><%@include file="localNews.jsp"%></td>
+            <% } %>
+            <td></td>
+        </tr>
+        <tr>
+            <% if(propertiesBean.isBusinessInterest()) { %>
+                <td><%@include file="businessNews.jsp"%></td>
+            <% } else { %>
+                <td><%@include file="localNews.jsp"%></td>
+            <% } %>
+            <td></td>
+            <% if(propertiesBean.isSportsInterest()) { %>
+                <td><%@include file="sportsNews.jsp"%></td>
+            <% } else { %>
+                <td><%@include file="localNews.jsp"%></td>
+            <% } %>
+        </tr>
+        <tr>
+            <td></td>
+            <% if(propertiesBean.isScienceNewsInterest()) { %>
+                <td><%@include file="scienceNews.jsp"%></td>
+            <% } else { %>
+                <td><%@include file="localNews.jsp"%></td>
+            <% } %>
+            <td></td>
+        </tr>
+    </table>
+</body>
+</html>

composite-view/web/scienceNews.jsp

@@ -0,0 +1,34 @@
+<%--
+  Created by IntelliJ IDEA.
+  User: Kevin
+  Date: 11/29/2021
+  Time: 4:18 PM
+  To change this template use File | Settings | File Templates.
+--%>
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+    <body>
+        <div style="text-align: center">
+            <h3>
+                Generic Science News
+            </h3>
+            <ul>
+                <li>
+                    New model of gravity proposed for dark matter
+                </li>
+                <li>
+                    Genetic modifying technique proved on bacteria
+                </li>
+                <li>
+                    Neurology study maps brain with new precision
+                </li>
+                <li>
+                    Survey of rainforest discovers 15 new species
+                </li>
+                <li>
+                    New signalling pathway for immune system discovered
+                </li>
+            </ul>
+        </div>
+    </body>
+</html>

composite-view/web/sportsNews.jsp

@@ -0,0 +1,32 @@
+<%--
+  Created by IntelliJ IDEA.
+  User: Kevin
+  Date: 11/29/2021
+  Time: 3:53 PM
+  To change this template use File | Settings | File Templates.
+--%>
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+  <head>
+    <style>
+      h2 { text-align: center;}
+      table {border: 1px solid black;}
+      tr {text-align: center;}
+      td {text-align: center;}
+    </style>
+  </head>
+  <body>
+    <h2>
+      Generic Sports News
+    </h2>
+    <div style="margin-left: auto; margin-right: auto; padding: 20px">
+      International football match delayed due to weather, will be held next week
+    </div>
+    <div style="margin-left: auto; margin-right: auto; padding: 20px">
+      New rising stars in winter sports, ten new athletes that will shake up the scene
+    </div>
+    <div style="margin-left: auto; margin-right: auto; padding: 20px">
+      Biggest upset in basketball history, upstart team sweeps competition
+    </div>
+  </body>
+</html>

composite-view/web/worldNews.jsp

@@ -0,0 +1,34 @@
+<%--
+  Created by IntelliJ IDEA.
+  User: Kevin
+  Date: 11/29/2021
+  Time: 2:51 PM
+  To change this template use File | Settings | File Templates.
+--%>
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+<head>
+    <style>
+        h2 { text-align: center;}
+        table {border: 1px solid black;}
+        tr {text-align: center;}
+        td {text-align: center;}
+    </style>
+</head>
+<body>
+    <h2>
+        Generic World News
+    </h2>
+    <table style="margin-right: auto; margin-left: auto">
+        <tr>
+            <td>New trade talks happening at UN on Thursday</td>
+        </tr>
+        <tr>
+            <td>European Union to announce new resolution next week</td>
+        </tr>
+        <tr>
+            <td>UN delivers report on world economic status</td>
+        </tr>
+    </table>
+</body>
+</html>

pom.xml

@@ -228,6 +228,7 @@
     <module>lockable-object</module>
     <module>fanout-fanin</module>
     <module>domain-model</module>
+    <module>composite-view</module>
     <module>metadata-mapping</module>
   </modules>
   <repositories>