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