1   /**
2    * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3    *
4    * This library is free software; you can redistribute it and/or modify it under
5    * the terms of the GNU Lesser General Public License as published by the Free
6    * Software Foundation; either version 2.1 of the License, or (at your option)
7    * any later version.
8    *
9    * This library is distributed in the hope that it will be useful, but WITHOUT
10   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11   * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12   * details.
13   */
14  
15  package com.liferay.portal.kernel.servlet;
16  
17  import com.liferay.portal.kernel.log.Log;
18  import com.liferay.portal.kernel.log.LogFactoryUtil;
19  import com.liferay.portal.kernel.util.PortalClassLoaderUtil;
20  import com.liferay.portal.kernel.util.PortalInitable;
21  import com.liferay.portal.kernel.util.PortalInitableUtil;
22  
23  import java.io.IOException;
24  
25  import javax.servlet.ServletConfig;
26  import javax.servlet.ServletException;
27  import javax.servlet.http.HttpServlet;
28  import javax.servlet.http.HttpServletRequest;
29  import javax.servlet.http.HttpServletResponse;
30  
31  /**
32   * <a href="PortalClassLoaderServlet.java.html"><b><i>View Source</i></b></a>
33   *
34   * @author Brian Wing Shun Chan
35   */
36  public class PortalClassLoaderServlet
37      extends HttpServlet implements PortalInitable {
38  
39      public void destroy() {
40          Thread currentThread = Thread.currentThread();
41  
42          ClassLoader contextClassLoader = currentThread.getContextClassLoader();
43  
44          try {
45              currentThread.setContextClassLoader(
46                  PortalClassLoaderUtil.getClassLoader());
47  
48              _servlet.destroy();
49          }
50          finally {
51              currentThread.setContextClassLoader(contextClassLoader);
52          }
53      }
54  
55      public void init(ServletConfig servletConfig) {
56          _servletConfig = servletConfig;
57  
58          PortalInitableUtil.init(this);
59      }
60  
61      public void portalInit() {
62          Thread currentThread = Thread.currentThread();
63  
64          ClassLoader contextClassLoader = currentThread.getContextClassLoader();
65  
66          ClassLoader portalClassLoader = PortalClassLoaderUtil.getClassLoader();
67  
68          try {
69              currentThread.setContextClassLoader(portalClassLoader);
70  
71              String servletClass = _servletConfig.getInitParameter(
72                  "servlet-class");
73  
74              _servlet = (HttpServlet)portalClassLoader.loadClass(
75                  servletClass).newInstance();
76  
77              _servlet.init(_servletConfig);
78          }
79          catch (Exception e) {
80              _log.error(e, e);
81          }
82          finally {
83              currentThread.setContextClassLoader(contextClassLoader);
84          }
85      }
86  
87      public void service(
88              HttpServletRequest request, HttpServletResponse response)
89          throws IOException, ServletException {
90  
91          Thread currentThread = Thread.currentThread();
92  
93          ClassLoader contextClassLoader = currentThread.getContextClassLoader();
94  
95          try {
96              currentThread.setContextClassLoader(
97                  PortalClassLoaderUtil.getClassLoader());
98  
99              _servlet.service(request, response);
100         }
101         finally {
102             currentThread.setContextClassLoader(contextClassLoader);
103         }
104     }
105 
106     private static Log _log = LogFactoryUtil.getLog(
107         PortalClassLoaderServlet.class);
108 
109     private HttpServlet _servlet;
110     private ServletConfig _servletConfig;
111 
112 }