01: /*
02: * JacORB - a free Java ORB
03: *
04: * Copyright (C) 1997-2004 Gerald Brose.
05: *
06: * This library is free software; you can redistribute it and/or
07: * modify it under the terms of the GNU Library General Public
08: * License as published by the Free Software Foundation; either
09: * version 2 of the License, or (at your option) any later version.
10: *
11: * This library is distributed in the hope that it will be useful,
12: * but WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * Library General Public License for more details.
15: *
16: * You should have received a copy of the GNU Library General Public
17: * License along with this library; if not, write to the Free
18: * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19: */
20:
21: package org.jacorb.orb.giop;
22:
23: import java.util.List;
24: import java.util.Iterator;
25:
26: /**
27: * @author Nicolas Noffke
28: * @version $Id: LFUSelectionStrategyImpl.java,v 1.6 2004/05/06 12:40:00 nicolas Exp $
29: */
30:
31: public class LFUSelectionStrategyImpl implements SelectionStrategy {
32: public ServerGIOPConnection selectForClose(List connections) {
33: ServerGIOPConnection least_used = null;
34: double least_usage = Double.MAX_VALUE;
35:
36: for (Iterator it = connections.iterator(); it.hasNext();) {
37: ServerGIOPConnection conn = (ServerGIOPConnection) it
38: .next();
39:
40: if (!conn.hasPendingMessages()) {
41: LFUStatisticsProviderImpl sp = (LFUStatisticsProviderImpl) conn
42: .getStatisticsProvider();
43:
44: double frequency = sp.getFrequency();
45:
46: if (frequency < least_usage) {
47: least_used = conn;
48: least_usage = frequency;
49: }
50: }
51: }
52:
53: return least_used;
54: }
55: }
|