| 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 }