1 // ======================================================================== 2 // Copyright 2004-2010 Mort Bay Consulting Pty. Ltd. 3 // ------------------------------------------------------------------------ 4 // All rights reserved. This program and the accompanying materials 5 // are made available under the terms of the Eclipse Public License v1.0 6 // and Apache License v2.0 which accompanies this distribution. 7 // The Eclipse Public License is available at 8 // http://www.eclipse.org/legal/epl-v10.html 9 // The Apache License v2.0 is available at 10 // http://www.opensource.org/licenses/apache2.0.php 11 // You may elect to redistribute this code under either of these licenses. 12 // ======================================================================== 13 14 package org.eclipse.jetty.server.session; 15 16 import java.io.IOException; 17 import java.io.Serializable; 18 19 import javax.servlet.ServletException; 20 import javax.servlet.http.HttpServlet; 21 import javax.servlet.http.HttpServletRequest; 22 import javax.servlet.http.HttpServletResponse; 23 import javax.servlet.http.HttpSession; 24 25 26 /** 27 * WebAppObjectInSessionServlet 28 * 29 * 30 */ 31 public class WebAppObjectInSessionServlet extends HttpServlet 32 { 33 @Override 34 protected void doGet(HttpServletRequest request, HttpServletResponse httpServletResponse) throws ServletException, IOException 35 { 36 try 37 { 38 String action = request.getParameter("action"); 39 if ("set".equals(action)) 40 { 41 HttpSession session = request.getSession(true); 42 session.setAttribute("staticAttribute", new TestSharedStatic()); 43 // session.setAttribute("objectAttribute", new TestSharedNonStatic()); 44 // The session itself is not shareable, since the implementation class 45 // refers to the session manager via the hidden field this$0, and 46 // it seems there is no way to mark the hidden field as transient. 47 // session.setAttribute("sessionAttribute", session); 48 } 49 else if ("get".equals(action)) 50 { 51 HttpSession session = request.getSession(false); 52 Object staticAttribute = session.getAttribute("staticAttribute"); 53 assert staticAttribute instanceof TestSharedStatic; 54 // Object objectAttribute = session.getAttribute("objectAttribute"); 55 // assert objectAttribute instanceof TestSharedNonStatic; 56 // Object sessionAttribute = session.getAttribute("sessionAttribute"); 57 // assert sessionAttribute instanceof HttpSession; 58 } 59 } 60 catch (Exception e) 61 { 62 e.printStackTrace(); 63 } 64 } 65 66 // Non static inner classes are not shareable, because even if this class is portable, 67 // the hidden field this$0 refers to the servlet, which is a non portable class. 68 public class TestSharedNonStatic implements Serializable 69 { 70 } 71 72 // Static inner classes are shareable 73 public static class TestSharedStatic implements Serializable 74 { 75 } 76 }