// ========================================================================
   // Copyright 2004-2010 Mort Bay Consulting Pty. Ltd.
   // ------------------------------------------------------------------------
   // All rights reserved. This program and the accompanying materials
   // are made available under the terms of the Eclipse Public License v1.0
   // and Apache License v2.0 which accompanies this distribution.
   // The Eclipse Public License is available at
   // http://www.eclipse.org/legal/epl-v10.html
   // The Apache License v2.0 is available at
  // http://www.opensource.org/licenses/apache2.0.php
  // You may elect to redistribute this code under either of these licenses.
  // ========================================================================
  package org.eclipse.jetty.server.session;
  
  import java.io.IOException;
  import java.util.Random;
  
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import javax.servlet.http.HttpSession;
  
  import org.eclipse.jetty.client.ContentExchange;
  import org.eclipse.jetty.client.HttpClient;
  import org.eclipse.jetty.http.HttpMethods;
  import org.junit.Test;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  
  /**
   * AbstractLastAccessTimeTest
   */
  public abstract class AbstractLastAccessTimeTest
  {
      public abstract AbstractTestServer createServer(int port, int max, int scavenge);
  
      @Test
      public void testLastAccessTime() throws Exception
      {
          String contextPath = "";
          String servletMapping = "/server";
          int maxInactivePeriod = 8;
          int scavengePeriod = 2;
          AbstractTestServer server1 = createServer(0, maxInactivePeriod, scavengePeriod);
          server1.addContext(contextPath).addServlet(TestServlet.class, servletMapping);
          server1.start();
          int port1=server1.getPort();
          try
          {
              AbstractTestServer server2 = createServer(0, maxInactivePeriod, scavengePeriod);
              server2.addContext(contextPath).addServlet(TestServlet.class, servletMapping);
              server2.start();
              int port2=server2.getPort();
              try
              {
                  HttpClient client = new HttpClient();
                  client.setConnectorType(HttpClient.CONNECTOR_SOCKET);
                  client.start();
                  try
                  {
                      // Perform one request to server1 to create a session
                      ContentExchange exchange1 = new ContentExchange(true);
                      exchange1.setMethod(HttpMethods.GET);
                      exchange1.setURL("http://localhost:" + port1 + contextPath + servletMapping + "?action=init");
                      client.send(exchange1);
                      exchange1.waitForDone();
                      assertEquals(HttpServletResponse.SC_OK, exchange1.getResponseStatus());
                      String sessionCookie = exchange1.getResponseFields().getStringField("Set-Cookie");
                      assertTrue( sessionCookie != null );
                      // Mangle the cookie, replacing Path with $Path, etc.
                      sessionCookie = sessionCookie.replaceFirst("(\\W)(P|p)ath=", "$1\\$Path=");
  
                      // Perform some request to server2 using the session cookie from the previous request
                      // This should migrate the session from server1 to server2, and leave server1's
                      // session in a very stale state, while server2 has a very fresh session.
                      // We want to test that optimizations done to the saving of the shared lastAccessTime
                      // do not break the correct working
                      int requestInterval = 500;
                      for (int i = 0; i < maxInactivePeriod * (1000 / requestInterval); ++i)
                      {
                          ContentExchange exchange2 = new ContentExchange(true);
                          exchange2.setMethod(HttpMethods.GET);
                          exchange2.setURL("http://localhost:" + port2 + contextPath + servletMapping);
                          exchange2.getRequestFields().add("Cookie", sessionCookie);
                          client.send(exchange2);
                          exchange2.waitForDone();
                          assertEquals(HttpServletResponse.SC_OK , exchange2.getResponseStatus());
                          String setCookie = exchange1.getResponseFields().getStringField("Set-Cookie");
                          if (setCookie!=null)                    
                              sessionCookie = setCookie.replaceFirst("(\\W)(P|p)ath=", "$1\\$Path=");
                          
                          Thread.sleep(requestInterval);
                      }
  
                      System.out.println("Waiting for scavenging on node1...");
  
                      // At this point, session1 should be eligible for expiration.
                     // Let's wait for the scavenger to run, waiting 2.5 times the scavenger period
                     Thread.sleep(scavengePeriod * 2500L);
 
                     // Access again server1, and be sure we can
                     exchange1 = new ContentExchange(true);
                     exchange1.setMethod(HttpMethods.GET);
                     exchange1.setURL("http://localhost:" + port1 + contextPath + servletMapping);
                     exchange1.getRequestFields().add("Cookie", sessionCookie);
                     client.send(exchange1);
                     exchange1.waitForDone();
                     assertEquals(HttpServletResponse.SC_OK, exchange1.getResponseStatus());
                     
                     // TODO shouldn't the session be expired????
                 }
                 finally
                 {
                     client.stop();
                 }
             }
             finally
             {
                 server2.stop();
             }
         }
         finally
         {
             server1.stop();
         }
     }
 
     public static class TestServlet extends HttpServlet
     {
         @Override
         protected void doGet(HttpServletRequest request, HttpServletResponse httpServletResponse) throws ServletException, IOException
         {
             String action = request.getParameter("action");
             if ("init".equals(action))
             {
                 HttpSession session = request.getSession(true);
                 session.setAttribute("test", "test");
             }
             else
             {
                 HttpSession session = request.getSession(false);
                 session.setAttribute("test", "test");
             }
         }
     }
 }