| /* |
| * Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0, which is available at |
| * http://www.eclipse.org/legal/epl-2.0. |
| * |
| * This Source Code may also be made available under the following Secondary |
| * Licenses when the conditions for such availability set forth in the |
| * Eclipse Public License v. 2.0 are satisfied: GNU General Public License, |
| * version 2 with the GNU Classpath Exception, which is available at |
| * https://www.gnu.org/software/classpath/license.html. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 |
| */ |
| |
| /* |
| * CustomerDetails.java |
| * |
| * Created on March 17, 2008, 1:00 AM |
| */ |
| |
| package web; |
| |
| import java.io.*; |
| import java.net.*; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| import jakarta.annotation.Resource; |
| import javax.naming.Context; |
| import javax.naming.InitialContext; |
| import jakarta.persistence.EntityManager; |
| import jakarta.persistence.PersistenceContext; |
| |
| import jakarta.servlet.*; |
| import jakarta.servlet.http.*; |
| import jakarta.transaction.UserTransaction; |
| import persistence.*; |
| |
| /** |
| * |
| * @author adminuser |
| * @version |
| */ |
| @PersistenceContext(name = "persistence/LogicalName", unitName = "webappPU") |
| public class CustomerDetails extends HttpServlet { |
| |
| @Resource |
| private UserTransaction utx; |
| |
| /** Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods. |
| * @param request servlet request |
| * @param response servlet response |
| */ |
| protected void processRequest(HttpServletRequest request, HttpServletResponse response) |
| throws ServletException, IOException { |
| response.setContentType("text/html;charset=UTF-8"); |
| PrintWriter out = response.getWriter(); |
| // TODO output your page here |
| out.println("<html>"); |
| out.println("<head>"); |
| out.println("<title>Servlet CustomerDetails</title>"); |
| out.println("</head>"); |
| out.println("<body>"); |
| out.println("<h1>Servlet CustomerDetails at " + request.getContextPath () + "</h1>"); |
| |
| out.println("<h2>Search Customer Information</h2>"); |
| out.println("<p>Pl. select from 1,2,3,4,5 as a customer number</p>"); |
| String customerNr = request.getParameter("customer_nr"); |
| if((customerNr != null) && !(customerNr.equals(""))) { |
| |
| WebCustomer customer = findByID(new Integer(customerNr)); |
| if(customer != null){ |
| out.println("Customer's info for nr. " + customerNr + ": " + customer.getCustname()); |
| }else{ |
| out.println("Customer not found."); |
| } |
| } |
| out.println("<form>"); |
| out.println("Customer number: <input type='text' name='customer_nr' />"); |
| out.println("<input type=submit value=Select />"); |
| out.println("</form>"); |
| |
| |
| out.println("</body>"); |
| out.println("</html>"); |
| |
| out.close(); |
| } |
| |
| // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code."> |
| /** Handles the HTTP <code>GET</code> method. |
| * @param request servlet request |
| * @param response servlet response |
| */ |
| protected void doGet(HttpServletRequest request, HttpServletResponse response) |
| throws ServletException, IOException { |
| processRequest(request, response); |
| } |
| |
| /** Handles the HTTP <code>POST</code> method. |
| * @param request servlet request |
| * @param response servlet response |
| */ |
| protected void doPost(HttpServletRequest request, HttpServletResponse response) |
| throws ServletException, IOException { |
| processRequest(request, response); |
| } |
| |
| /** Returns a short description of the servlet. |
| */ |
| public String getServletInfo() { |
| return "Short description"; |
| } |
| // </editor-fold> |
| |
| protected WebCustomer findByID(Integer customerNr) { |
| WebCustomer customer=null; |
| try { |
| Context ctx = (Context) new InitialContext().lookup("java:comp/env"); |
| utx.begin(); |
| EntityManager em = (EntityManager) ctx.lookup("persistence/LogicalName"); |
| customer = em.find(WebCustomer.class, customerNr); |
| utx.commit(); |
| |
| |
| // TODO: |
| // em.persist(object); utx.commit(); |
| } catch(Exception e) { |
| Logger.getLogger(getClass().getName()).log(Level.SEVERE,"exception caught", e); |
| throw new RuntimeException(e); |
| } |
| |
| return customer; |
| } |
| |
| |
| } |
