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Java > Open Source Codes > com > sun > enterprise > server > logging > LogRotationTimer


1 /*
2  * The contents of this file are subject to the terms
3  * of the Common Development and Distribution License
4  * (the License). You may not use this file except in
5  * compliance with the License.
6  *
7  * You can obtain a copy of the license at
8  * https://glassfish.dev.java.net/public/CDDLv1.0.html or
9  * glassfish/bootstrap/legal/CDDLv1.0.txt.
10  * See the License for the specific language governing
11  * permissions and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL
14  * Header Notice in each file and include the License file
15  * at glassfish/bootstrap/legal/CDDLv1.0.txt.
16  * If applicable, add the following below the CDDL Header,
17  * with the fields enclosed by brackets [] replaced by
18  * you own identifying information:
19  * "Portions Copyrighted [year] [name of copyright owner]"
20  *
21  * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
22  */
23 package com.sun.enterprise.server.logging;
24
25 import java.util.Timer JavaDoc;
26
27 public class LogRotationTimer {
28     private Timer JavaDoc rotationTimer;
29
30     private LogRotationTimerTask rotationTimerTask;
31
32     private static LogRotationTimer instance = new LogRotationTimer( );
33
34     private LogRotationTimer( ) {
35         rotationTimer = new Timer JavaDoc( );
36     }
37
38     public static LogRotationTimer getInstance( ) {
39         return instance;
40     }
41
42     public void startTimer( LogRotationTimerTask timerTask ) {
43         rotationTimerTask = timerTask;
44         rotationTimer.schedule( rotationTimerTask,
45             timerTask.getRotationTimerValue( ) );
46     }
47
48     public void stopTimer( ) {
49         rotationTimer.cancel( );
50     }
51
52     public void restartTimer( ) {
53         // We will restart the timer only if the timerTask is set which
54 // means user has set a value for LogRotation based on Time
55 if( rotationTimerTask != null ) {
56             rotationTimerTask.cancel( );
57             rotationTimerTask = new LogRotationTimerTask(
58                 // This is wierd, We need to have a fresh TimerTask object
59 // to reschedule the work.
60 rotationTimerTask.getRotationTimerValueInMinutes( ) );
61             rotationTimer.schedule( rotationTimerTask,
62                 rotationTimerTask.getRotationTimerValue( ) );
63         }
64     }
65 }
66
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