/* * The MIT License * Copyright © 2014-2019 Ilkka Seppälä * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.iluwatar.leaderelection.bully; import com.iluwatar.leaderelection.Instance; import com.iluwatar.leaderelection.Message; import com.iluwatar.leaderelection.MessageManager; import com.iluwatar.leaderelection.MessageType; import java.util.HashMap; import java.util.Map; /** * Example of how to use bully leader election. Initially 5 instances is created in the clould * system, and the instance with ID 1 is set as leader. After the system is started stop the leader * instance, and the new leader will be elected. */ public class BullyApp { /** * Program entry point. */ public static void main(String[] args) { Map instanceMap = new HashMap<>(); var messageManager = new BullyMessageManager(instanceMap); var instance1 = new BullyInstance(messageManager, 1, 1); var instance2 = new BullyInstance(messageManager, 2, 1); var instance3 = new BullyInstance(messageManager, 3, 1); var instance4 = new BullyInstance(messageManager, 4, 1); var instance5 = new BullyInstance(messageManager, 5, 1); instanceMap.put(1, instance1); instanceMap.put(2, instance2); instanceMap.put(3, instance3); instanceMap.put(4, instance4); instanceMap.put(5, instance5); instance4.onMessage(new Message(MessageType.HEARTBEAT_INVOKE, "")); final var thread1 = new Thread(instance1); final var thread2 = new Thread(instance2); final var thread3 = new Thread(instance3); final var thread4 = new Thread(instance4); final var thread5 = new Thread(instance5); thread1.start(); thread2.start(); thread3.start(); thread4.start(); thread5.start(); instance1.setAlive(false); } }