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Java > Open Source Codes > org > mr > core > util > SystemTime


1 /*
2  * Copyright 2002 by
3  * <a HREF="http://www.coridan.com">Coridan</a>
4  * <a HREF="mailto: support@coridan.com ">support@coridan.com</a>
5  *
6  * The contents of this file are subject to the Mozilla Public License Version
7  * 1.1 (the "License"); you may not use this file except in compliance with the
8  * License. You may obtain a copy of the License at
9  * http://www.mozilla.org/MPL/
10  *
11  * Software distributed under the License is distributed on an "AS IS" basis,
12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13  * for the specific language governing rights and limitations under the
14  * License.
15  *
16  * The Original Code is "MantaRay" (TM).
17  *
18  * The Initial Developer of the Original Code is Amir Shevat.
19  * Portions created by the Initial Developer are Copyright (C) 2006
20  * Coridan Inc. All Rights Reserved.
21  *
22  * Contributor(s): all the names of the contributors are added in the source
23  * code where applicable.
24  *
25  * Alternatively, the contents of this file may be used under the terms of the
26  * LGPL license (the "GNU LESSER GENERAL PUBLIC LICENSE"), in which case the
27  * provisions of LGPL are applicable instead of those above. If you wish to
28  * allow use of your version of this file only under the terms of the LGPL
29  * License and not to allow others to use your version of this file under
30  * the MPL, indicate your decision by deleting the provisions above and
31  * replace them with the notice and other provisions required by the LGPL.
32  * If you do not delete the provisions above, a recipient may use your version
33  * of this file under either the MPL or the GNU LESSER GENERAL PUBLIC LICENSE.
34  
35  *
36  * This library is free software; you can redistribute it and/or modify it
37  * under the terms of the MPL as stated above or under the terms of the GNU
38  * Lesser General Public License as published by the Free Software Foundation;
39  * either version 2.1 of the License, or any later version.
40  *
41  * This library is distributed in the hope that it will be useful, but WITHOUT
42  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
43  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
44  * License for more details.
45  */
46 /*
47  * Created on Dec 10, 2003
48  *
49  * To change the template for this generated file go to
50  * Window - Preferences - Java - Code Generation - Code and Comments
51  */
52 package org.mr.core.util;
53
54 import java.util.GregorianCalendar JavaDoc;
55 import java.util.Timer JavaDoc;
56 import java.util.TimerTask JavaDoc;
57
58 /**
59  * This class return the current time in millisecond and the current time with a GMT
60  * offset. Using System.currentTimeMillis() slows down a process, here we do it every
61  * second and other thread get the time from here.
62  * @author Amir Shevat
63  */
64 public class SystemTime {
65     private static long time = System.currentTimeMillis();
66     
67     /**
68      * Use this method to get the time instead System.currentTimeMillis()
69      * @return same as System.currentTimeMillis() but in a 1000 milli resolution
70      */
71     public static long currentTimeMillis(){
72         return time;
73     }
74     /**
75      * Use this method to get the current time in milliseconds + the offset from
76      * GMT.
77      * @return same as System.currentTimeMillis() but in a 1000 milli resolution
78      * + offset
79      */
80     public static long gmtCurrentTimeMillis(){
81         return time;
82     }
83     
84     /**
85      * Initiate the SystemTime. Must be done before using the SystemTime methods.
86      */
87     public static void init(){
88         Timer JavaDoc time = new Timer JavaDoc(true);
89         
90         GregorianCalendar JavaDoc cal = new GregorianCalendar JavaDoc();
91         // overwrite the run method to call the sync
92 TimerTask JavaDoc timerTask = new TimerTask JavaDoc(){
93             public void run(){
94                 SystemTime.sync();
95             }
96         };
97                 
98         time.schedule(timerTask,1000,1000);
99     }//init
100
101     /**
102      * Updates the SystemTime time with the System.currentTimeMillis()
103      */
104     public static void sync(){
105         time = System.currentTimeMillis();
106     }
107     
108     
109 }//SystemTime
110
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