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Arun Gupta
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New sample to show stateful EJB
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‎ejb/stateful/nb-configuration.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project-shared-configuration>
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<!--
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This file contains additional configuration written by modules in the NetBeans IDE.
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The configuration is intended to be shared among all the users of project and
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therefore it is assumed to be part of version control checkout.
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Without this configuration present, some functionality in the IDE may be limited or fail altogether.
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-->
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<properties xmlns="http://www.netbeans.org/ns/maven-properties-data/1">
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<!--
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Properties that influence various parts of the IDE, especially code formatting and the like.
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You can copy and paste the single properties, into the pom.xml file and the IDE will pick them up.
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That way multiple projects can share the same settings (useful for formatting rules for example).
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Any value defined here will override the pom.xml file value but is only applicable to the current project.
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-->
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<org-netbeans-modules-maven-j2ee.netbeans_2e_hint_2e_deploy_2e_server>gfv3ee6</org-netbeans-modules-maven-j2ee.netbeans_2e_hint_2e_deploy_2e_server>
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</properties>
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</project-shared-configuration>

‎ejb/stateful/pom.xml‎

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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>org.javaee7.ejb</groupId>
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<artifactId>ejb-samples</artifactId>
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<version>1.0-SNAPSHOT</version>
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<relativePath>../pom.xml</relativePath>
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</parent>
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<groupId>org.javaee7.ejb</groupId>
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<artifactId>stateful</artifactId>
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<version>1.0-SNAPSHOT</version>
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<packaging>war</packaging>
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</project>

‎ejb/stateful/src/main/java/org/javaee7/ejb/stateful/Cart.java‎

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/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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*
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* Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved.
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*
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* The contents of this file are subject to the terms of either the GNU
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* General Public License Version 2 only ("GPL") or the Common Development
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* and Distribution License("CDDL") (collectively, the "License"). You
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* may not use this file except in compliance with the License. You can
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* obtain a copy of the License at
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* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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* or packager/legal/LICENSE.txt. See the License for the specific
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* language governing permissions and limitations under the License.
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*
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* When distributing the software, include this License Header Notice in each
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* file and include the License file at packager/legal/LICENSE.txt.
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*
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* GPL Classpath Exception:
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* Oracle designates this particular file as subject to the "Classpath"
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* exception as provided by Oracle in the GPL Version 2 section of the License
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* file that accompanied this code.
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*
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* Modifications:
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* If applicable, add the following below the License Header, with the fields
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* enclosed by brackets [] replaced by your own identifying information:
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* "Portions Copyright [year] [name of copyright owner]"
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*
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* Contributor(s):
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* If you wish your version of this file to be governed by only the CDDL or
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* only the GPL Version 2, indicate your decision by adding "[Contributor]
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* elects to include this software in this distribution under the [CDDL or GPL
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* Version 2] license." If you don't indicate a single choice of license, a
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* recipient has the option to distribute your version of this file under
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* either the CDDL, the GPL Version 2 or to extend the choice of license to
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* its licensees as provided above. However, if you add GPL Version 2 code
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* and therefore, elected the GPL Version 2 license, then the option applies
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* only if the new code is made subject to such option by the copyright
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* holder.
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*/
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package org.javaee7.ejb.stateful;
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import java.util.ArrayList;
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import java.util.List;
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import javax.ejb.Remove;
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import javax.ejb.Stateful;
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/**
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* @author Arun Gupta
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*/
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@Stateful
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public class Cart {
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List<String> items;
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public Cart() {
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items = new ArrayList<>();
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}
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public void addItem(String item) {
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items.add(item);
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}
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public void removeItem(String item) {
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items.remove(item);
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}
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public void purchase() {
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//. . .
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}
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public List<String> getItems() {
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return items;
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}
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@Remove
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public void remove() {
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items = null;
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}
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}

‎ejb/stateful/src/main/java/org/javaee7/ejb/stateful/TestServlet.java‎

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/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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*
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* Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved.
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*
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* The contents of this file are subject to the terms of either the GNU
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* General Public License Version 2 only ("GPL") or the Common Development
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* and Distribution License("CDDL") (collectively, the "License"). You
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* may not use this file except in compliance with the License. You can
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* obtain a copy of the License at
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* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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* or packager/legal/LICENSE.txt. See the License for the specific
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* language governing permissions and limitations under the License.
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*
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* When distributing the software, include this License Header Notice in each
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* file and include the License file at packager/legal/LICENSE.txt.
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*
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* GPL Classpath Exception:
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* Oracle designates this particular file as subject to the "Classpath"
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* exception as provided by Oracle in the GPL Version 2 section of the License
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* file that accompanied this code.
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*
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* Modifications:
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* If applicable, add the following below the License Header, with the fields
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* enclosed by brackets [] replaced by your own identifying information:
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* "Portions Copyright [year] [name of copyright owner]"
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*
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* Contributor(s):
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* If you wish your version of this file to be governed by only the CDDL or
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* only the GPL Version 2, indicate your decision by adding "[Contributor]
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* elects to include this software in this distribution under the [CDDL or GPL
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* Version 2] license." If you don't indicate a single choice of license, a
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* recipient has the option to distribute your version of this file under
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* either the CDDL, the GPL Version 2 or to extend the choice of license to
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* its licensees as provided above. However, if you add GPL Version 2 code
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* and therefore, elected the GPL Version 2 license, then the option applies
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* only if the new code is made subject to such option by the copyright
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* holder.
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*/
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package org.javaee7.ejb.stateful;
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import java.io.IOException;
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import java.io.PrintWriter;
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import javax.inject.Inject;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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/**
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* @author Arun Gupta
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*/
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@WebServlet(urlPatterns = {"/TestServlet"})
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public class TestServlet extends HttpServlet {
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@Inject Cart bean;;
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/**
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* Processes requests for both HTTP <code>GET</code> and <code>POST</code>
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* methods.
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*
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* @param request servlet request
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* @param response servlet response
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* @throws ServletException if a servlet-specific error occurs
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* @throws IOException if an I/O error occurs
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*/
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protected void processRequest(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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response.setContentType("text/html;charset=UTF-8");
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try (PrintWriter out = response.getWriter()) {
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out.println("<!DOCTYPE html>");
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out.println("<html>");
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out.println("<head>");
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out.println("<title>Adding/Removing items from Stateful Bean</title>");
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out.println("</head>");
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out.println("<body>");
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out.println("<h1>Adding/Removing items from Stateful Bean</h1>");
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out.println("<h2>Adding items</h2>");
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bean.addItem("apple");
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bean.addItem("banana");
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bean.addItem("mango");
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bean.addItem("kiwi");
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bean.addItem("passion fruit");
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out.println("added");
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out.println("<h2>Listing items</h2>");
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out.println(bean.getItems());
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out.println("<h2>Removing item</h2>");
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bean.removeItem("banana");
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out.println("removed");
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out.println("<h2>Listing items</h2>");
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out.println(bean.getItems());
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out.println("</body>");
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out.println("</html>");
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}
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}
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// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
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/**
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* Handles the HTTP <code>GET</code> method.
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*
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* @param request servlet request
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* @param response servlet response
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* @throws ServletException if a servlet-specific error occurs
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* @throws IOException if an I/O error occurs
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*/
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@Override
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protected void doGet(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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processRequest(request, response);
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}
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/**
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* Handles the HTTP <code>POST</code> method.
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*
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* @param request servlet request
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* @param response servlet response
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* @throws ServletException if a servlet-specific error occurs
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* @throws IOException if an I/O error occurs
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*/
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@Override
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protected void doPost(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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processRequest(request, response);
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}
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/**
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* Returns a short description of the servlet.
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*
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* @return a String containing servlet description
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*/
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@Override
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public String getServletInfo() {
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return "Short description";
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}// </editor-fold>
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}

‎ejb/stateful/src/main/webapp/index.jsp‎

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<!--
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/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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*
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* Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved.
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*
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* The contents of this file are subject to the terms of either the GNU
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* General Public License Version 2 only ("GPL") or the Common Development
9+
* and Distribution License("CDDL") (collectively, the "License"). You
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* may not use this file except in compliance with the License. You can
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* obtain a copy of the License at
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* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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* or packager/legal/LICENSE.txt. See the License for the specific
14+
* language governing permissions and limitations under the License.
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*
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* When distributing the software, include this License Header Notice in each
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* file and include the License file at packager/legal/LICENSE.txt.
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*
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* GPL Classpath Exception:
20+
* Oracle designates this particular file as subject to the "Classpath"
21+
* exception as provided by Oracle in the GPL Version 2 section of the License
22+
* file that accompanied this code.
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*
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* Modifications:
25+
* If applicable, add the following below the License Header, with the fields
26+
* enclosed by brackets [] replaced by your own identifying information:
27+
* "Portions Copyright [year] [name of copyright owner]"
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*
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* Contributor(s):
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* If you wish your version of this file to be governed by only the CDDL or
31+
* only the GPL Version 2, indicate your decision by adding "[Contributor]
32+
* elects to include this software in this distribution under the [CDDL or GPL
33+
* Version 2] license." If you don't indicate a single choice of license, a
34+
* recipient has the option to distribute your version of this file under
35+
* either the CDDL, the GPL Version 2 or to extend the choice of license to
36+
* its licensees as provided above. However, if you add GPL Version 2 code
37+
* and therefore, elected the GPL Version 2 license, then the option applies
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* only if the new code is made subject to such option by the copyright
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* holder.
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*/
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-->
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<%@page contentType="text/html" pageEncoding="UTF-8"%>
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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"http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>EJB : Stateful</title>
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</head>
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<body>
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<h1>EJB : Stateful</h1>
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<a href="${pageContext.request.contextPath}/TestServlet"/>Call beans</a>.
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</body>
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</html>

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