01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * Resin Open Source is free software; you can redistribute it and/or modify
10: * it under the terms of the GNU General Public License as published by
11: * the Free Software Foundation; either version 2 of the License, or
12: * (at your option) any later version.
13: *
14: * Resin Open Source is distributed in the hope that it will be useful,
15: * but WITHOUT ANY WARRANTY; without even the implied warranty of
16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17: * of NON-INFRINGEMENT. See the GNU General Public License for more
18: * details.
19: *
20: * You should have received a copy of the GNU General Public License
21: * along with Resin Open Source; if not, write to the
22: * Free SoftwareFoundation, Inc.
23: * 59 Temple Place, Suite 330
24: * Boston, MA 02111-1307 USA
25: *
26: * @author Sam
27: */
28:
29: package javax.management.j2ee.statistics;
30:
31: /**
32: * A statistic about a managed object.
33: */
34: public interface Statistic {
35: /**
36: * Returns the name of this statistics, corresponding to the name of the {@link Stats}
37: * attribute that provides the value.
38: */
39: public String getName();
40:
41: /**
42: * Returns the unit of measurement for this statistic.
43: *
44: * TimeStatistic returns one of "HOUR", "MINUTE",
45: * "SECOND", "MILLISECOND", "MICROSECOND", or "NANOSECOND".
46: * @return
47: */
48: public String getUnit();
49:
50: /**
51: * A description of the statistic.
52: */
53: public String getDescription();
54:
55: /**
56: * Returns the time that the first measurement was taken for this statistic,
57: * the number of milliseconds sinch 00:00 January 1, 1970.
58: */
59: public long getStartTime();
60:
61: /**
62: * Returns the time that the last measurement was taken for this statistic,
63: * the number of milliseconds sinch 00:00 January 1, 1970.
64: */
65: public long getLastSampleTime();
66: }
|