01: /*
02: * Copyright (c) 2003, Intracom S.A. - www.intracom.com
03: *
04: * This library is free software; you can redistribute it and/or
05: * modify it under the terms of the GNU Lesser General Public
06: * License as published by the Free Software Foundation; either
07: * version 2 of the License, or (at your option) any later version
08: *
09: * This library is distributed in the hope that it will be useful,
10: * but WITHOUT ANY WARRANTY; without even the implied warranty of
11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12: * Lesser General Public License for more details.
13: *
14: * You should have received a copy of the GNU Lesser General Public
15: * License along with this library; if not, write to the Free Software
16: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17: *
18: * This package and its source code is available at www.jboss.org
19: **/
20: package org.jboss.jmx.adaptor.snmp.agent;
21:
22: /**
23: * Utility class that provides time keeping from the time of instantiation.
24: * Can be queried for time readings since the last incarnation in msecs.
25: *
26: * @version $Revision: 44599 $
27: *
28: * @author <a href="mailto:spol@intracom.gr">Spyros Pollatos</a>
29: * @author <a href="mailto:dimitris@jboss.org">Dimitris Andreadis</a>
30: */
31: public final class Clock {
32: /** Holds instantiation time */
33: private long instantiationTime;
34:
35: /**
36: * CTOR - creates time counter with zeroed out clock
37: */
38: public Clock() {
39: this .instantiationTime = System.currentTimeMillis();
40: }
41:
42: /**
43: * Returns the difference, measured in milliseconds, between the
44: * instantiation time and midnight, January 1, 1970 UTC.
45: */
46: public long instantiationTime() {
47: return this .instantiationTime;
48: }
49:
50: /**
51: * Returns the elapsed time in msecs from the time of instantiation.
52: */
53: public long uptime() {
54: return System.currentTimeMillis() - this .instantiationTime;
55: }
56:
57: } // class Clock
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