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1   package net.sourceforge.blogentis.turbine;
2   
3   //-----------------------------------------------------------------------
4   //Blogentis - a blog publishing platform.
5   //Copyright (C) 2004 Tassos Bassoukos <abassouk@gmail.com>
6   //
7   //This library is free software; you can redistribute it and/or
8   //modify it under the terms of the GNU Lesser General Public
9   //License as published by the Free Software Foundation; either
10  //version 2.1 of the License, or (at your option) any later version.
11  //
12  //This library is distributed in the hope that it will be useful,
13  //but WITHOUT ANY WARRANTY; without even the implied warranty of
14  //MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  //Lesser General Public License for more details.
16  //
17  //You should have received a copy of the GNU Lesser General Public
18  //License along with this library; if not, write to the Free Software
19  //Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  //-----------------------------------------------------------------------
21  //
22  //$Id: BlogRunDataService.java,v 1.1 2004/10/22 17:34:14 tassos Exp $
23  //
24  
25  import javax.servlet.ServletConfig;
26  import javax.servlet.http.HttpServletRequest;
27  import javax.servlet.http.HttpServletResponse;
28  
29  import net.sourceforge.blogentis.slide.SlideService;
30  
31  import org.apache.commons.logging.Log;
32  import org.apache.commons.logging.LogFactory;
33  import org.apache.turbine.services.TurbineServices;
34  import org.apache.turbine.services.rundata.RunDataService;
35  import org.apache.turbine.services.rundata.TurbineRunDataService;
36  import org.apache.turbine.util.RunData;
37  import org.apache.turbine.util.TurbineException;
38  
39  /***
40   * This service extends the default TurbineRunDataService with the ability to
41   * retrieve the current threads associated RunData object.
42   * 
43   * @author abas
44   */
45  public class BlogRunDataService extends TurbineRunDataService {
46      private static Log log = LogFactory.getLog(BlogRunDataService.class);
47  
48      protected static ThreadLocal currentRunData = new ThreadLocal();
49  
50      public boolean putRunData(RunData data) {
51          if (currentRunData.get() != data) // yes, this is *pointer* equality.
52              log
53                 .error("Tried to put back a RunData that was not given by this thread!");
54          else if (log.isDebugEnabled())
55              log.debug("Putting back the RunData of this thread.");
56          SlideService.getInstance().endRequest();
57          currentRunData.set(null);
58          return super.putRunData(data);
59      }
60  
61      public RunData getRunData(String key, HttpServletRequest req,
62                                HttpServletResponse res, ServletConfig config)
63              throws TurbineException, IllegalArgumentException {
64  
65          RunData data = super.getRunData(key, req, res, config);
66          if (currentRunData.get() != null) {
67              log.error("Sheet... We didn't clear previous RunData");
68          } else if (log.isDebugEnabled())
69              log.debug("Getting a new RunData Object for the current thread.");
70          currentRunData.set(data);
71          SlideService.getInstance().startRequest();
72          return data;
73      }
74  
75      /***
76       * Get this thread's associated RunData Object.
77       * 
78       * @return the current RunData object.
79       */
80      public BlogRunData getThreadRunData() {
81          return (BlogRunData)currentRunData.get();
82      }
83  
84      /***
85       * Get this thread's associated RunData Object.
86       * 
87       * @return the current RunData object.
88       */
89      public static BlogRunData getCurrentRunData() {
90          return ((BlogRunDataService)TurbineServices.getInstance().getService(
91                  RunDataService.SERVICE_NAME)).getThreadRunData();
92      }
93  }