1   /**
2    * Copyright (c) 2000-2009 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  import java.net.InetAddress;
29  
30  /**
31   * <a href="MulticastServerTool.java.html"><b><i>View Source</i></b></a>
32   *
33   * <p>
34   * A server that will send out heart beat messages until you kill it. This
35   * enables you to try and debug multicast issues.
36   * </p>
37   *
38   * @author Michael C. Han
39   *
40   */
41  public class MulticastServerTool {
42  
43      public static void main(String[] args) {
44          try {
45              int port = GetterUtil.getInteger(args[1]);
46              long interval = GetterUtil.getLong(args[2]);
47  
48              DatagramHandler handler = new DatagramHandler() {
49  
50                  public void process(DatagramPacket packet) {
51                      String s = new String(
52                          packet.getData(), 0, packet.getLength());
53  
54                      System.out.println(s);
55                  }
56  
57                  public void errorReceived(Throwable t) {
58                      t.printStackTrace();
59                  }
60  
61              };
62  
63              MulticastTransport transport = new MulticastTransport(
64                  handler, args[0], port);
65  
66              transport.connect();
67  
68              String msg =
69                  InetAddress.getLocalHost().getHostName() + ":" + port +
70                      " heartbeat " ;
71  
72              int i = 0;
73  
74              while (true) {
75                  transport.sendMessage(msg + i);
76  
77                  i++;
78  
79                  Thread.sleep(interval);
80              }
81          }
82          catch (Exception e) {
83              e.printStackTrace();
84  
85              System.err.println(
86                  "Usage: java MulticastServerTool multicastAddress port " +
87                      "interval");
88  
89              System.exit(1);
90          }
91      }
92  
93  }