1   /**
2    * Copyright (c) 2000-2008 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.kernel.servlet;
24  
25  import com.liferay.portal.kernel.log.Log;
26  import com.liferay.portal.kernel.log.LogFactoryUtil;
27  import com.liferay.portal.kernel.util.PortalClassLoaderUtil;
28  import com.liferay.portal.kernel.util.PortalInitable;
29  import com.liferay.portal.kernel.util.PortalInitableUtil;
30  import com.liferay.portal.kernel.util.StringUtil;
31  
32  import java.io.IOException;
33  
34  import javax.servlet.Filter;
35  import javax.servlet.FilterChain;
36  import javax.servlet.FilterConfig;
37  import javax.servlet.ServletException;
38  import javax.servlet.ServletRequest;
39  import javax.servlet.ServletResponse;
40  
41  /**
42   * <a href="PortalClassLoaderFilter.java.html"><b><i>View Source</i></b></a>
43   *
44   * @author Brian Wing Shun Chan
45   *
46   */
47  public class PortalClassLoaderFilter implements Filter, PortalInitable {
48  
49      public void portalInit() {
50          try {
51              ClassLoader classLoader = PortalClassLoaderUtil.getClassLoader();
52  
53              String filterClass = _config.getInitParameter("filter-class");
54  
55              if (filterClass.startsWith("com.liferay.filters.")) {
56                  filterClass = StringUtil.replace(
57                      filterClass, "com.liferay.filters.",
58                      "com.liferay.portal.servlet.filters.");
59              }
60  
61              _filter = (Filter)classLoader.loadClass(filterClass).newInstance();
62  
63              _filter.init(_config);
64          }
65          catch (Exception e) {
66              _log.error(e, e);
67          }
68      }
69  
70      public void init(FilterConfig config) throws ServletException {
71          _config = config;
72  
73          PortalInitableUtil.init(this);
74      }
75  
76      public void doFilter(
77              ServletRequest req, ServletResponse res, FilterChain chain)
78          throws IOException, ServletException {
79  
80          ClassLoader contextClassLoader =
81              Thread.currentThread().getContextClassLoader();
82  
83          try {
84              Thread.currentThread().setContextClassLoader(
85                  PortalClassLoaderUtil.getClassLoader());
86  
87              _filter.doFilter(req, res, chain);
88          }
89          finally {
90              Thread.currentThread().setContextClassLoader(contextClassLoader);
91          }
92      }
93  
94      public void destroy() {
95          ClassLoader contextClassLoader =
96              Thread.currentThread().getContextClassLoader();
97  
98          try {
99              Thread.currentThread().setContextClassLoader(
100                 PortalClassLoaderUtil.getClassLoader());
101 
102             _filter.destroy();
103         }
104         finally {
105             Thread.currentThread().setContextClassLoader(contextClassLoader);
106         }
107     }
108 
109     private static Log _log =
110         LogFactoryUtil.getLog(PortalClassLoaderFilter.class);
111 
112     private Filter _filter;
113     private FilterConfig _config;
114 
115 }