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Java > Open Source Codes > org > nemesis > forum > util > cache > CacheTimer


1 /*
2  * NEMESIS-FORUM.
3  * Copyright (C) 2002 David Laurent(lithium2@free.fr). All rights reserved.
4  *
5  * Copyright (c) 2000 The Apache Software Foundation. All rights reserved.
6  *
7  * Copyright (C) 2001 Yasna.com. All rights reserved.
8  *
9  * Copyright (C) 2000 CoolServlets.com. All rights reserved.
10  *
11  * NEMESIS-FORUM. is free software; you can redistribute it and/or
12  * modify it under the terms of the Apache Software License, Version 1.1,
13  * or (at your option) any later version.
14  *
15  * NEMESIS-FORUM core framework, NEMESIS-FORUM backoffice, NEMESIS-FORUM frontoffice
16  * application are parts of NEMESIS-FORUM and are distributed under
17  * same terms of licence.
18  *
19  *
20  * NEMESIS-FORUM includes software developed by the Apache Software Foundation (http://www.apache.org/)
21  * and software developed by CoolServlets.com (http://www.coolservlets.com).
22  * and software developed by Yasna.com (http://www.yasna.com).
23  *
24  */
25
26 package org.nemesis.forum.util.cache;
27
28 /**
29  * Simple timer that keeps the currentTime variable of Cache accurate to one
30  * second of the real clock time.
31  */
32 public class CacheTimer extends Thread JavaDoc {
33
34     private long updateInterval;
35
36     /**
37      * Creates a new CacheTimer object. The currentTime of Cache will be
38      * updated at the specified update interval.
39      *
40      * @param updateInterval the interval in milleseconds that updates should
41      * be done.
42      */
43     public CacheTimer(long updateInterval) {
44         this.updateInterval = updateInterval;
45         //Make the timer be a daemon thread so that it won't keep the VM from
46 //shutting down if there are no other threads.
47 this.setDaemon(true);
48         //Start the timer thread.
49 start();
50     }
51
52     public void run() {
53         //Run the timer indefinetly.
54 while (true) {
55             Cache.currentTime = System.currentTimeMillis();
56             try {
57                 sleep(updateInterval);
58             }
59             catch (InterruptedException JavaDoc ie) { }
60         }
61     }
62 }
63
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