01: /*
02: * <copyright>
03: *
04: * Copyright 2001-2004 BBNT Solutions, LLC
05: * under sponsorship of the Defense Advanced Research Projects
06: * Agency (DARPA).
07: *
08: * You can redistribute this software and/or modify it under the
09: * terms of the Cougaar Open Source License as published on the
10: * Cougaar Open Source Website (www.cougaar.org).
11: *
12: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
13: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
14: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
15: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
16: * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
17: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
18: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
22: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23: *
24: * </copyright>
25: */
26:
27: package org.cougaar.planning.plugin.completion;
28:
29: public class LaggardFilter {
30: public static final long LAGGARD_UPDATE_INTERVAL = 15000L;
31: public static final long NON_LAGGARD_UPDATE_INTERVAL = 120000L;
32:
33: private Laggard oldLaggard = null;
34: private long updateTime;
35:
36: public boolean filter(Laggard newLaggard) {
37: if (oldLaggard == newLaggard)
38: return false;
39: boolean result = filter(newLaggard.isLaggard(), newLaggard
40: .getTimestamp());
41: if (result)
42: setOldLaggard(newLaggard);
43: return result;
44: }
45:
46: public boolean filter(boolean isLaggard, long timestamp) {
47: return oldLaggard == null
48: || oldLaggard.isLaggard() != isLaggard
49: || timestamp > updateTime;
50: }
51:
52: public void setOldLaggard(Laggard newLaggard) {
53: oldLaggard = newLaggard;
54: updateTime = oldLaggard.getTimestamp()
55: + (oldLaggard.isLaggard() ? LAGGARD_UPDATE_INTERVAL
56: : NON_LAGGARD_UPDATE_INTERVAL);
57: }
58: }
|