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Java > Open Source Codes > com > Yasna > util > CacheTimer


1 /**
2  * $RCSfile: CacheTimer.java,v $
3  * $Revision: 1.3 $
4  * $Date: 2006/01/07 00:21:06 $
5  *
6  * Copyright (C) 2000 CoolServlets.com. All rights reserved.
7  *
8  * ===================================================================
9  * The Apache Software License, Version 1.1
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  *
15  * 1. Redistributions of source code must retain the above copyright
16  * notice, this list of conditions and the following disclaimer.
17  *
18  * 2. Redistributions in binary form must reproduce the above copyright
19  * notice, this list of conditions and the following disclaimer in
20  * the documentation and/or other materials provided with the
21  * distribution.
22  *
23  * 3. The end-user documentation included with the redistribution,
24  * if any, must include the following acknowledgment:
25  * "This product includes software developed by
26  * CoolServlets.com (http://www.Yasna.com)."
27  * Alternately, this acknowledgment may appear in the software itself,
28  * if and wherever such third-party acknowledgments normally appear.
29  *
30  * 4. The names "Jive" and "CoolServlets.com" must not be used to
31  * endorse or promote products derived from this software without
32  * prior written permission. For written permission, please
33  * contact webmaster@Yasna.com.
34  *
35  * 5. Products derived from this software may not be called "Jive",
36  * nor may "Jive" appear in their name, without prior written
37  * permission of CoolServlets.com.
38  *
39  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
40  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
41  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
42  * DISCLAIMED. IN NO EVENT SHALL COOLSERVLETS.COM OR
43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
45  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
46  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
47  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
48  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
49  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50  * SUCH DAMAGE.
51  * ====================================================================
52  *
53  * This software consists of voluntary contributions made by many
54  * individuals on behalf of CoolServlets.com. For more information
55  * on CoolServlets.com, please see <http://www.Yasna.com>.
56  */
57
58 package com.Yasna.util;
59
60 /**
61  * Simple timer that keeps the currentTime variable of Cache accurate to one
62  * second of the real clock time.
63  */
64 public class CacheTimer extends Thread JavaDoc {
65
66     private long updateInterval;
67
68     /**
69      * Creates a new CacheTimer object. The currentTime of Cache will be
70      * updated at the specified update interval.
71      *
72      * @param updateInterval the interval in milleseconds that updates should
73      * be done.
74      */
75     public CacheTimer(long updateInterval) {
76         this.updateInterval = updateInterval;
77         //Make the timer be a daemon thread so that it won't keep the VM from
78 //shutting down if there are no other threads.
79 this.setDaemon(true);
80         //Start the timer thread.
81 start();
82     }
83
84     public void run() {
85         //Run the timer indefinetly.
86 while (true) {
87             Cache.currentTime = System.currentTimeMillis();
88             try {
89                 sleep(updateInterval);
90             }
91             catch (InterruptedException JavaDoc ie) { }
92         }
93     }
94 }
95
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