//
   //  ========================================================================
   //  Copyright (c) 1995-2016 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 static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  import java.io.IOException;
  
  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.HttpClient;
  import org.eclipse.jetty.client.api.ContentResponse;
  import org.eclipse.jetty.server.Request;
  import org.eclipse.jetty.server.SessionManager;
  import org.junit.Test;
  
  /**
   * AbstractLocalSessionScavengingTest
   */
  public abstract class AbstractLocalSessionScavengingTest
  {
      public abstract AbstractTestServer createServer(int port, int max, int scavenge);
  
      public void pause(int scavengePeriod)
      {
          try
          {
              Thread.sleep(scavengePeriod * 2500L);
          }
          catch (InterruptedException e)
          {
              e.printStackTrace();
          }
      }
  
      @Test
      public void testLocalSessionsScavenging() throws Exception
      {
          String contextPath = "";
          String servletMapping = "/server";
          int inactivePeriod = 3;
          int scavengePeriod = 1;
          AbstractTestServer server1 = createServer(0, inactivePeriod, scavengePeriod);
          server1.addContext(contextPath).addServlet(TestServlet.class, servletMapping);
  
          try
          {
              server1.start();
              int port1 = server1.getPort();
              AbstractTestServer server2 = createServer(0, inactivePeriod, scavengePeriod * 3);
              server2.addContext(contextPath).addServlet(TestServlet.class, servletMapping);
  
              try
              {
                  server2.start();
                  int port2 = server2.getPort();
                  HttpClient client = new HttpClient();
                  client.start();
                  try
                  {
                      String[] urls = new String[2];
                      urls[0] = "http://localhost:" + port1 + contextPath + servletMapping;
                      urls[1] = "http://localhost:" + port2 + contextPath + servletMapping;
  
                      // Create the session on node1
                      ContentResponse response1 = client.GET(urls[0] + "?action=init");
                      assertEquals(HttpServletResponse.SC_OK,response1.getStatus());
                      String sessionCookie = response1.getHeaders().get("Set-Cookie");
                      assertTrue(sessionCookie != null);
                      // Mangle the cookie, replacing Path with $Path, etc.
                      sessionCookie = sessionCookie.replaceFirst("(\\W)(P|p)ath=", "$1\\$Path=");
  
                      // Be sure the session is also present in node2
                      org.eclipse.jetty.client.api.Request request = client.newRequest(urls[1] + "?action=test");
                      request.header("Cookie", sessionCookie);
                      ContentResponse response2 = request.send();
                      assertEquals(HttpServletResponse.SC_OK,response2.getStatus());
  
                     // Wait for the scavenger to run on node1, waiting 2.5 times the scavenger period
                     pause(inactivePeriod+scavengePeriod);
 
                     // Check that node1 does not have any local session cached
                     request = client.newRequest(urls[0] + "?action=check");
                     request.header("Cookie", sessionCookie);
                     response1 = request.send();
                     assertEquals(HttpServletResponse.SC_OK,response1.getStatus());
 
                     // Wait for the scavenger to run on node2, waiting 2 times the scavenger period
                     // This ensures that the scavenger on node2 runs at least once.
                     pause(inactivePeriod+(3*scavengePeriod));
                     
                     // Check that node2 does not have any local session cached
                     request = client.newRequest(urls[1] + "?action=check");
                     request.header("Cookie", sessionCookie);
                     response2 = request.send();
                     assertEquals(HttpServletResponse.SC_OK,response2.getStatus());
                 }
                 finally
                 {
                     client.stop();
                 }
             }
             finally
             {
                 server2.stop();
             }
         }
         finally
         {
             server1.stop();
         }
     }
 
     public static class TestServlet extends HttpServlet
     {
         private SessionManager sessionManager;
 
         @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");
                 this.sessionManager = ((Request)request).getSessionManager();
             }
             else if ("test".equals(action))
             {
                 HttpSession session = request.getSession(false);
                 session.setAttribute("test", "test");
                 this.sessionManager = ((Request)request).getSessionManager();
             }
             else if ("check".equals(action))
             {
                 HttpSession session = request.getSession(false);
                 assertTrue(session == null);
             }
         }
     }
 }