1/*
2 * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package javax.management.timer;
27
28import java.util.Date;
29import java.lang.System.Logger.Level;
30import static com.sun.jmx.defaults.JmxProperties.TIMER_LOGGER;
31
32/**
33 * This class provides a simple implementation of an alarm clock MBean.
34 * The aim of this MBean is to set up an alarm which wakes up the timer every timeout (fixed-delay)
35 * or at the specified date (fixed-rate).
36 */
37
38class TimerAlarmClock extends java.util.TimerTask {
39
40    Timer listener = null;
41    long timeout = 10000;
42    Date next = null;
43
44    /*
45     * ------------------------------------------
46     *  CONSTRUCTORS
47     * ------------------------------------------
48     */
49
50    public TimerAlarmClock(Timer listener, long timeout) {
51        this.listener = listener;
52        this.timeout = Math.max(0L, timeout);
53    }
54
55    public TimerAlarmClock(Timer listener, Date next) {
56        this.listener = listener;
57        this.next = next;
58    }
59
60    /*
61     * ------------------------------------------
62     *  PUBLIC METHODS
63     * ------------------------------------------
64     */
65
66    /**
67     * This method is called by the timer when it is started.
68     */
69    public void run() {
70
71        try {
72            //this.sleep(timeout);
73            TimerAlarmClockNotification notif = new TimerAlarmClockNotification(this);
74            listener.notifyAlarmClock(notif);
75        } catch (Exception e) {
76            TIMER_LOGGER.log(Level.TRACE,
77                    "Got unexpected exception when sending a notification", e);
78        }
79    }
80}
81