01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10: Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11: Suite 350, San Mateo, CA 94403, USA.
12:
13: db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14: WARRANTY; without even the implied warranty of MERCHANTABILITY or
15: FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16: for more details.
17:
18: You should have received a copy of the GNU General Public License along
19: with this program; if not, write to the Free Software Foundation, Inc.,
20: 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21: package com.db4o.foundation;
22:
23: /**
24: * @sharpen.ignore
25: * @exclude
26: */
27: public final class SimpleTimer implements Runnable {
28:
29: private final Runnable _runnable;
30:
31: private final int _interval;
32:
33: private final String _name;
34:
35: private Lock4 _lock;
36:
37: public volatile boolean stopped = false;
38:
39: public SimpleTimer(Runnable runnable, int interval, String name) {
40: _runnable = runnable;
41: _interval = interval;
42: _name = name;
43: _lock = new Lock4();
44: }
45:
46: public void start() {
47: Thread thread = new Thread(this );
48: thread.setDaemon(true);
49: thread.setName(_name);
50: thread.start();
51: }
52:
53: public void stop() {
54: stopped = true;
55: synchronized (_lock) {
56: _lock.awake();
57: }
58: }
59:
60: public void run() {
61: while (!stopped) {
62: synchronized (_lock) {
63: _lock.snooze(_interval);
64: }
65: if (!stopped) {
66: _runnable.run();
67: }
68: }
69: }
70: }
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