/*

 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package javax.management.timer;

import java.util.Date;

import java.util.logging.Level;

import static com.sun.jmx.defaults.JmxProperties.TIMER_LOGGER;

/**

 * This class provides a simple implementation of an alarm clock MBean.

 * The aim of this MBean is to set up an alarm which wakes up the timer every timeout (fixed-delay)

 * or at the specified date (fixed-rate).

 */

class TimerAlarmClock extends java.util.TimerTask {

    Timer listener = null;

    long timeout = 10000;

    Date next = null;

    /*

     * ------------------------------------------

     *  CONSTRUCTORS

     * ------------------------------------------

     */

    public TimerAlarmClock(Timer listener, long timeout) {

        this.listener = listener;

        this.timeout = Math.max(0L, timeout);

    }

    public TimerAlarmClock(Timer listener, Date next) {

        this.listener = listener;

        this.next = next;

    }

    /*

     * ------------------------------------------

     *  PUBLIC METHODS

     * ------------------------------------------

     */

    /**

     * This method is called by the timer when it is started.

     */

    public void run() {

        try {

            //this.sleep(timeout);

            TimerAlarmClockNotification notif = new TimerAlarmClockNotification(this);

            listener.notifyAlarmClock(notif);

        } catch (Exception e) {

            TIMER_LOGGER.logp(Level.FINEST, Timer.class.getName(), "run",

                    "Got unexpected exception when sending a notification", e);

        }

    }

}