MulticastClientTool.java |
1 /** 2 * Copyright (c) 2000-2008 Liferay, Inc. All rights reserved. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a copy 5 * of this software and associated documentation files (the "Software"), to deal 6 * in the Software without restriction, including without limitation the rights 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 8 * copies of the Software, and to permit persons to whom the Software is 9 * furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 20 * SOFTWARE. 21 */ 22 23 package com.liferay.util.transport; 24 25 import com.liferay.portal.kernel.util.GetterUtil; 26 27 import java.net.DatagramPacket; 28 29 /** 30 * <a href="MulticastClientTool.java.html"><b><i>View Source</i></b></a> 31 * 32 * <p> 33 * A client that listens for multicast messages at a designated port. You may 34 * use this to for potential multicast issues when tuning distributed caches. 35 * </p> 36 * 37 * @author Michael C. Han 38 * 39 */ 40 public class MulticastClientTool { 41 42 public static void main(String[] args) { 43 try { 44 int port = GetterUtil.getInteger(args[1]); 45 46 DatagramHandler handler = new DatagramHandler() { 47 48 public void process(DatagramPacket packet) { 49 String s = new String( 50 packet.getData(), 0, packet.getLength()); 51 52 System.out.println(s); 53 } 54 55 public void errorReceived(Throwable t) { 56 t.printStackTrace(); 57 } 58 59 }; 60 61 MulticastTransport transport = new MulticastTransport( 62 handler, args[0], port); 63 64 transport.connect(); 65 66 synchronized (transport) { 67 transport.wait(); 68 } 69 } 70 catch (Exception e) { 71 e.printStackTrace(); 72 73 System.err.println( 74 "Usage: java MulticastClientTool multicastAddress port"); 75 76 System.exit(1); 77 } 78 } 79 80 }