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