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1   //========================================================================
2   //Copyright 2006 Mort Bay Consulting Pty. Ltd.
3   //------------------------------------------------------------------------
4   //Licensed under the Apache License, Version 2.0 (the "License");
5   //you may not use this file except in compliance with the License.
6   //You may obtain a copy of the License at
7   //http://www.apache.org/licenses/LICENSE-2.0
8   //Unless required by applicable law or agreed to in writing, software
9   //distributed under the License is distributed on an "AS IS" BASIS,
10  //WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11  //See the License for the specific language governing permissions and
12  //limitations under the License.
13  //========================================================================
14  
15  package org.mortbay.jetty.handler; 
16  
17  import java.io.IOException;
18  
19  import javax.servlet.ServletException;
20  import javax.servlet.http.HttpServletRequest;
21  import javax.servlet.http.HttpServletResponse;
22  
23  import org.mortbay.jetty.Request;
24  import org.mortbay.jetty.RequestLog;
25  import org.mortbay.jetty.Response;
26  import org.mortbay.jetty.Server;
27  import org.mortbay.log.Log;
28  
29  
30  
31  /** 
32   * RequestLogHandler.
33   * This handler can be used to wrap an individual context for context logging.
34   * 
35   * @author Nigel Canonizado
36   * @org.apache.xbean.XBean
37   */
38  public class RequestLogHandler extends HandlerWrapper
39  {
40      private RequestLog _requestLog;
41      
42      /* ------------------------------------------------------------ */
43      /* 
44       * @see org.mortbay.jetty.Handler#handle(java.lang.String, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, int)
45       */
46      public void handle(String target, HttpServletRequest request, HttpServletResponse response, int dispatch)
47              throws IOException, ServletException
48      {
49          super.handle(target, request, response, dispatch);
50          if (dispatch==REQUEST && _requestLog!=null)
51              _requestLog.log((Request)request, (Response)response);
52      }
53  
54      /* ------------------------------------------------------------ */
55      public void setRequestLog(RequestLog requestLog)
56      {
57          //are we changing the request log impl?
58          try
59          {
60              if (_requestLog != null)
61                  _requestLog.stop();
62          }
63          catch (Exception e)
64          {
65              Log.warn (e);
66          }
67          
68          if (getServer()!=null)
69              getServer().getContainer().update(this, _requestLog, requestLog, "logimpl",true);
70          
71          _requestLog = requestLog;
72          
73          //if we're already started, then start our request log
74          try
75          {
76              if (isStarted() && (_requestLog != null))
77                  _requestLog.start();
78          }
79          catch (Exception e)
80          {
81              throw new RuntimeException (e);
82          }
83      }
84  
85      /* ------------------------------------------------------------ */
86      /* 
87       * @see org.mortbay.jetty.handler.HandlerWrapper#setServer(org.mortbay.jetty.Server)
88       */
89      public void setServer(Server server)
90      {
91          if (_requestLog!=null)
92          {
93              if (getServer()!=null && getServer()!=server)
94                  getServer().getContainer().update(this, _requestLog, null, "logimpl",true);
95              super.setServer(server);
96              if (server!=null && server!=getServer())
97                  server.getContainer().update(this, null,_requestLog, "logimpl",true);
98          }
99          else
100             super.setServer(server);
101     }
102 
103     /* ------------------------------------------------------------ */
104     public RequestLog getRequestLog() 
105     {
106         return _requestLog;
107     }
108 
109     /* ------------------------------------------------------------ */
110     /* 
111      * @see org.mortbay.jetty.handler.HandlerWrapper#doStart()
112      */
113     protected void doStart() throws Exception
114     {
115         super.doStart();
116         if (_requestLog!=null)
117             _requestLog.start();
118     }
119 
120     /* ------------------------------------------------------------ */
121     /* 
122      * @see org.mortbay.jetty.handler.HandlerWrapper#doStop()
123      */
124     protected void doStop() throws Exception
125     {
126         super.doStop();
127         if (_requestLog!=null)
128             _requestLog.stop();
129     }
130 
131     
132 }