fileserversession.java

P2P协议GUNTELLA的java源代码

/*
 * Copyright (C) 2000-2001  Ken McCrary
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Email: [e-mail]
 */
package com.kenmccrary.jtella;

import com.kenmccrary.jtella.util.Log;

/** 
 *  Session that can be used to respond to Query messages and receive
 *  Push messages
 *
 */
public class FileServerSession 
{
  private Router router;
  private MessageReceiver receiver;

  /**
   *  Constructs the <code>FileServerSession</code>, not visible
   *  to application
   *
   */
  FileServerSession(Router router,
                    MessageReceiver receiver)
  {
    this.router = router;
    this.receiver = receiver;
    router.addSearchMessageReceiver(receiver);
    router.addPushMessageReceiver(receiver);
  }

  /**
   *  Closes the session
   *
   */
  public void close()
  {
    router.removeSearchMessageReceiver(receiver);
    router.removePushMessageReceiver(receiver);
  }    
  
  /**
   *  An application should call <code>queryHit</code> to indicate that
   *  a search query is satisfied
   *
   *  @param request search message which has a hit
   *  @param response hit information
   */
  public void queryHit(SearchMessage request, 
                       SearchReplyMessage response)
  {

    NodeConnection connection = router.getQuerySource(request);

    try
    {
      if (null != connection) 
      {
        connection.prioritySend(response);
      }
      else
      {
        Log.getLog().logDebug("Null connection for query: \n" + 
                              request.toString());
      }
    }
    catch (Exception e)
    {
      Log.getLog().log(e);
    }
  
  }
}