| /* |
| * 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.catalina.tribes; |
| |
| import java.net.DatagramPacket; |
| import java.net.InetAddress; |
| import java.net.MulticastSocket; |
| import java.net.UnknownHostException; |
| |
| /** |
| * A simple multicast test that replicates the core elements of Tomcat's |
| * multicast membership. If this works then multicast membership should work. |
| * Useful notes for various operating systems follow.<p> |
| * OSX |
| * <ul> |
| * <li>The firewall blocks multicast between processes on the local machine so |
| * you will need to disable the OSX firewall before the test below will |
| * work.</li> |
| * </ul> |
| * Windows Server 2008 |
| * <ul> |
| * <li>This works out of the box</li> |
| * </ul> |
| */ |
| public class TesterMulticast { |
| |
| private static final String ADDRESS = "228.0.0.4"; |
| private static final int PORT = 56565; |
| private static final InetAddress INET_ADDRESS; |
| |
| static { |
| InetAddress result = null; |
| try { |
| result = InetAddress.getByName(ADDRESS); |
| } catch (UnknownHostException e) { |
| // deal with later |
| } |
| INET_ADDRESS = result; |
| } |
| |
| |
| public static void main(String[] args) throws Exception { |
| // Start Rx Thread |
| Rx rx = new Rx(); |
| Thread rxThread = new Thread(rx); |
| rxThread.setDaemon(true); |
| rxThread.start(); |
| |
| // Start Tx Thread |
| Tx tx = new Tx(); |
| Thread txThread = new Thread(tx); |
| txThread.setDaemon(true); |
| txThread.start(); |
| |
| |
| Thread.sleep(10000); |
| |
| tx.stop(); |
| rx.stop(); |
| } |
| |
| private static class Rx implements Runnable { |
| |
| private volatile boolean run = true; |
| |
| @Override |
| public void run() { |
| try (MulticastSocket s = new MulticastSocket(PORT)) { |
| s.setLoopbackMode(false); |
| s.joinGroup(INET_ADDRESS); |
| DatagramPacket p = new DatagramPacket(new byte[4], 4); |
| p.setAddress(INET_ADDRESS); |
| p.setPort(PORT); |
| while (run) { |
| s.receive(p); |
| String d = new String (p.getData()); |
| System.out.println("Rx: " + d); |
| } |
| } catch (Exception e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| public void stop() { |
| run = false; |
| } |
| } |
| |
| private static class Tx implements Runnable { |
| |
| private volatile boolean run = true; |
| |
| @Override |
| public void run() { |
| try (MulticastSocket s = new MulticastSocket(PORT)) { |
| s.setLoopbackMode(false); |
| s.joinGroup(INET_ADDRESS); |
| DatagramPacket p = new DatagramPacket(new byte[4], 4); |
| p.setAddress(INET_ADDRESS); |
| p.setPort(PORT); |
| long counter = 0; |
| String msg; |
| while (run) { |
| msg = String.format("%04d", Long.valueOf(counter)); |
| p.setData(msg.getBytes()); |
| System.out.println("Tx: " + msg); |
| s.send(p); |
| counter++; |
| Thread.sleep(500); |
| } |
| } catch (Exception e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| public void stop() { |
| run = false; |
| } |
| } |
| } |