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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  
20  package org.apache.myfaces.orchestra.frameworkAdapter.jsf;
21  
22  import org.apache.commons.logging.Log;
23  import org.apache.commons.logging.LogFactory;
24  
25  import javax.servlet.Filter;
26  import javax.servlet.FilterChain;
27  import javax.servlet.FilterConfig;
28  import javax.servlet.ServletException;
29  import javax.servlet.ServletRequest;
30  import javax.servlet.ServletResponse;
31  import java.io.IOException;
32  
33  /***
34   * Configures the JsfFrameworkAdapter.
35   * <p>
36   * Orchestra accesses information about the request, response, session, etc via a
37   * FrameworkAdapter so that it can be used with multiple web tier frameworks. This
38   * class selects and configures the JSF version of this adapter.
39   * <p>
40   * Note that the conversation.jsf.OrchestraServletFilter class executes this class
41   * as a "subfilter", so defining this filter is not required if that filter is
42   * already defined.
43   * <p>
44   * If filter config parameter "conversationMessagerClass" is set, then this is 
45   * passed to the BasicFrameworkAdapter, meaning that this can be either a 
46   * beanname defined in the dependency-injection framework, or an absolute
47   * classname of a type implementing ConversationMessager.
48   */
49  public class JsfFrameworkAdapterFilter implements Filter
50  {
51  	private final static String INIT_CONVERSATION_MESSAGER = "conversationMessagerClass";
52  
53  	private final Log log = LogFactory.getLog(JsfFrameworkAdapterFilter.class);
54  	private JsfFrameworkAdapter adapter;
55  
56  	public void init(FilterConfig filterConfig) throws ServletException
57  	{
58  		String conversationMessager = filterConfig.getInitParameter(INIT_CONVERSATION_MESSAGER);
59  
60  		adapter =  new JsfFrameworkAdapter(conversationMessager);
61  	}
62  
63  	public void doFilter(ServletRequest req, ServletResponse rsp, FilterChain filterChain) throws IOException, ServletException
64  	{
65  		log.debug("doFilter");
66  		try
67  		{
68  			adapter.beginRequest(req, rsp);
69  			filterChain.doFilter(req, rsp);
70  		}
71  		finally
72  		{
73  			adapter.endRequest();
74  		}
75  	}
76  
77  	public void destroy()
78  	{
79  	}
80  }