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1   /*
2    *  XNap - A P2P framework and client.
3    *
4    *  See the file AUTHORS for copyright information.
5    *
6    *  This program is free software; you can redistribute it and/or modify
7    *  it under the terms of the GNU General Public License as published by
8    *  the Free Software Foundation.
9    *
10   *  This program is distributed in the hope that it will be useful,
11   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
12   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   *  GNU General Public License for more details.
14   *
15   *  You should have received a copy of the GNU General Public License
16   *  along with this program; if not, write to the Free Software
17   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18   */
19  
20  package org.xnap.io;
21  
22  import java.beans.PropertyChangeEvent;
23  import java.beans.PropertyChangeListener;
24  
25  import org.xnap.util.Preferences;
26  
27  /***
28   * 
29   */
30  public class UploadBandwidthManager extends BandwidthManager
31  	 implements PropertyChangeListener{
32  
33      //--- Constant(s) ---
34  
35  	private static Preferences prefs = Preferences.getInstance();
36  	private static UploadBandwidthManager instance 
37  		= new UploadBandwidthManager();
38  
39      // --- Data Field(s) ---
40  
41      // --- Constructor(s) ---
42  
43      public UploadBandwidthManager() 
44      {
45  		prefs.addPropertyChangeListener("uploadThrottle", this);
46  		prefs.addPropertyChangeListener("throttleUploads", this);
47  
48  		updateThrottle();
49      }
50  	
51      // --- Method(s) ---
52  
53  	public static UploadBandwidthManager getInstance()
54  	{
55  		return instance;
56  	}
57  
58      public void propertyChange(PropertyChangeEvent e)
59  	{
60  		updateThrottle();
61  	}
62  
63      private void updateThrottle()
64      {
65  		boolean throttle = prefs.getThrottleUploads();
66  		long b = prefs.getUploadThrottle() * 1024;
67  		setBandwidth((throttle) ? b : 0);
68      }
69  
70  
71  }