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Java > Open Source Codes > org > drftpd > slaveselection > filter > MinfreespaceFilter


1 /*
2  * This file is part of DrFTPD, Distributed FTP Daemon.
3  *
4  * DrFTPD is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  * DrFTPD is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with DrFTPD; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  */
18 package org.drftpd.slaveselection.filter;
19
20 import java.net.InetAddress JavaDoc;
21 import java.util.Iterator JavaDoc;
22 import java.util.Properties JavaDoc;
23
24 import net.sf.drftpd.Bytes;
25 import net.sf.drftpd.SlaveUnavailableException;
26 import net.sf.drftpd.master.config.FtpConfig;
27 import net.sf.drftpd.master.usermanager.User;
28 import net.sf.drftpd.remotefile.LinkedRemoteFileInterface;
29
30 /**
31  * Example slaveselection.conf entry:
32  * <pre>
33  * <n>.filter=minfreespace
34  * <n>.remove=10000
35  * <n>.minfreespace=1GB
36  * </pre>
37  *
38  * Works like this:
39  * if(diskfree > minfreespace) {
40  * addScore(minfreespace - diskfree * multiplier)
41  * }
42  * @author mog
43  * @version $Id: MinfreespaceFilter.java,v 1.5 2004/03/11 22:51:11 mog Exp $
44  */
45 public class MinfreespaceFilter extends Filter {
46     private long _minfreespace;
47
48     private float _multiplier;
49
50     public MinfreespaceFilter(FilterChain ssm, int i, Properties JavaDoc p) {
51         //_multiplier = -Integer.parseInt(FtpConfig.getProperty(p, i + ".multiplier"));
52 _multiplier =
53             BandwidthFilter.parseMultiplier(
54                 FtpConfig.getProperty(p, i + ".multiplier"));
55         _minfreespace =
56             Bytes.parseBytes(FtpConfig.getProperty(p, i + ".minfreespace"));
57     }
58
59     public void process(
60         ScoreChart scorechart,
61         User user,
62         InetAddress JavaDoc source,
63         char direction,
64         LinkedRemoteFileInterface file) {
65         for (Iterator JavaDoc iter = scorechart.getSlaveScores().iterator();
66             iter.hasNext();
67             ) {
68             ScoreChart.SlaveScore score = (ScoreChart.SlaveScore) iter.next();
69             long df;
70             try {
71                 df = score.getRSlave().getStatus().getDiskSpaceAvailable();
72                 if (df < _minfreespace) {
73                     if (_multiplier == 0) {
74                         iter.remove();
75                     } else {
76                         score.addScore(
77                             - (long) ((_minfreespace - df) * _multiplier));
78                     }
79                 }
80             } catch (SlaveUnavailableException e) {
81                 iter.remove();
82             }
83         }
84     }
85 }
86
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