SelectChannelAction


1   /*
2    * $Id: SelectChannelAction.java 54929 2004-10-16 16:38:42Z germuska $ 
3    *
4    * Copyright 1999-2004 The Apache Software Foundation.
5    * 
6    * Licensed under the Apache License, Version 2.0 (the "License");
7    * you may not use this file except in compliance with the License.
8    * 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, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  
19  package org.apache.struts.webapp.tiles.channel;
20  
21  import javax.servlet.http.HttpServletRequest  ;
22  import javax.servlet.http.HttpServletResponse  ;
23  import javax.servlet.http.HttpSession  ;
24  import org.apache.struts.action.Action;
25  import org.apache.struts.action.ActionForm;
26  import org.apache.struts.action.ActionForward;
27  import org.apache.struts.action.ActionMapping;
28  
29  public final class SelectChannelAction extends Action {
30  
31  
32      // --------------------------------------------------------- Public Methods
33  
34  
35      /**
36       * Process the specified HTTP request, and create the corresponding HTTP
37       * response (or forward to another web component that will create it).
38       * Return an <code>ActionForward</code> instance describing where and how
39       * control should be forwarded, or <code>null</code> if the response has
40       * already been completed.
41       *
42       * @param mapping The ActionMapping used to select this instance
43       * @param actionForm The optional ActionForm bean for this request (if any)
44       * @param request The HTTP request we are processing
45       * @param response The HTTP response we are creating
46       *
47       * @exception Exception if the application business logic throws
48       *  an exception
49       */
50      public ActionForward execute(
51                   ActionMapping mapping,
52                   ActionForm form,
53                   HttpServletRequest   request,
54                   HttpServletResponse   response)
55      throws Exception   {
56  
57      // Extract parameters we will need
58      String   requested = (String  )request.getParameter( "channel" );
59  
60      if( requested == null )
61          return (mapping.findForward("failed"));
62  
63        // set in session
64      HttpSession   session = request.getSession(false);
65      if (session != null)
66        session.setAttribute(ChannelFactorySet.FACTORY_SELECTOR_KEY, requested);
67      System.out.println( "Set channel to '" + requested + "'" );
68        return (mapping.findForward("success"));
69      }
70  
71  }
72
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