01: /*
02: * GarbageCollectionTask.java
03: *
04: * Copyright (C) 2000-2002 Peter Graves
05: * $Id: GarbageCollectionTask.java,v 1.1.1.1 2002/09/24 16:09:17 piso Exp $
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License
09: * 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: private long lastRunMillis;
26:
27: public GarbageCollectionTask() {
28: setIdle(1000); // Do gc after user has been idle for 1 second.
29: setRunnable(runnable);
30: }
31:
32: private synchronized final long getLastRunMillis() {
33: return lastRunMillis;
34: }
35:
36: private synchronized final void setLastRunMillis(long when) {
37: lastRunMillis = when;
38: }
39:
40: private final Runnable runnable = new Runnable() {
41: public void run() {
42: // Only do gc if there has been a user event since the last time
43: // we did gc.
44: if (Dispatcher.getLastEventMillis() > getLastRunMillis()) {
45: Runtime.getRuntime().gc();
46: setLastRunMillis(System.currentTimeMillis());
47: }
48: }
49: };
50: }
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