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Java > Open Source Codes > org > armedbear > j > GarbageCollectionTask


1 /*
2  * GarbageCollectionTask.java
3  *
4  * Copyright (C) 2000-2002 Peter Graves
5  * $Id: GarbageCollectionTask.java,v 1.1.1.1 2002/09/24 16:09:17 piso Exp $
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License
9  * as published by the Free Software Foundation; either version 2
10  * of the License, or (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20  */
21
22 package org.armedbear.j;
23
24 public final class GarbageCollectionTask extends IdleThreadTask
25 {
26     private long lastRunMillis;
27
28     public GarbageCollectionTask()
29     {
30         setIdle(1000); // Do gc after user has been idle for 1 second.
31 setRunnable(runnable);
32     }
33
34     private synchronized final long getLastRunMillis()
35     {
36         return lastRunMillis;
37     }
38
39     private synchronized final void setLastRunMillis(long when)
40     {
41         lastRunMillis = when;
42     }
43
44     private final Runnable JavaDoc runnable = new Runnable JavaDoc() {
45         public void run()
46         {
47             // Only do gc if there has been a user event since the last time
48 // we did gc.
49 if (Dispatcher.getLastEventMillis() > getLastRunMillis()) {
50                 Runtime.getRuntime().gc();
51                 setLastRunMillis(System.currentTimeMillis());
52             }
53         }
54     };
55 }
56
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