78 lines
2.4 KiB
Java
78 lines
2.4 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.code.gossip;
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import java.util.Date;
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import javax.management.NotificationListener;
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import javax.management.timer.Timer;
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/**
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* This object represents a timer for a gossip member. When the timer has elapsed without being
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* reset in the meantime, it will inform the GossipService about this who in turn will put the
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* gossip member on the dead list, because it is apparantly not alive anymore.
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*
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* @author joshclemm, harmenw
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*/
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public class GossipTimeoutTimer extends Timer {
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private final long _sleepTime;
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private final LocalGossipMember _source;
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/**
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* Constructor. Creates a reset-able timer that wakes up after millisecondsSleepTime.
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*
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* @param millisecondsSleepTime
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* The time for this timer to wait before an event.
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* @param notificationListener
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* @param member
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*/
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public GossipTimeoutTimer(long millisecondsSleepTime, NotificationListener notificationListener,
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LocalGossipMember member) {
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super();
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_sleepTime = millisecondsSleepTime;
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_source = member;
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addNotificationListener(notificationListener, null, null);
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}
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/**
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* @see javax.management.timer.Timer#start()
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*/
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public void start() {
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this.reset();
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super.start();
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}
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/**
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* Resets timer to start counting down from original time.
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*/
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public void reset() {
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removeAllNotifications();
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setWakeupTime(_sleepTime);
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}
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/**
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* Adds a new wake-up time for this timer.
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*
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* @param milliseconds
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*/
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private void setWakeupTime(long milliseconds) {
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addNotification("type", "message", _source, new Date(System.currentTimeMillis() + milliseconds));
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}
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}
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