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/**
* 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.openejb.client;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.MulticastSocket;
import java.net.SocketAddress;
import java.net.SocketTimeoutException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
/**
* @version $Rev$ $Date$
*/
@SuppressWarnings("UseOfSystemOutOrSystemErr")
public class MulticastTool {
private static final CommandParser cmd = new CommandParser() {
@Override
protected void init() {
category("Options");
opt('h', "host").type(String.class).value("239.255.3.2")
.description("Address of the multicast channel");
opt('p', "port").type(int.class).value(6142)
.description("Port of the multicast channel");
opt("date-format").type(String.class).value("HH:mm:ss")
.description("Date format to use for log lines");
category("Sending");
opt('s', "send").type(String.class)
.description("Optional message to broadcast to the channel");
opt('r', "rate").type(long.class).value(1000)
.description("Resend every N milliseconds. Zero sends just once");
category("Advanced");
opt("broadcast").type(boolean.class).description("java.net.MulticastSocket#setBroadcast");
opt("loopback-mode").type(boolean.class).description("java.net.MulticastSocket#setLoopbackMode");
opt("receive-buffer-size").type(int.class).description("java.net.MulticastSocket#setReceiveBufferSize");
opt("reuse-address").type(boolean.class).description("java.net.MulticastSocket#setReuseAddress");
opt("send-buffer-size").type(int.class).description("java.net.MulticastSocket#setSendBufferSize");
opt("so-timeout").type(int.class).description("java.net.MulticastSocket#setSoTimeout");
opt("time-to-live").type(int.class).description("java.net.MulticastSocket#setTimeToLive");
opt("traffic-class").type(int.class).description("java.net.MulticastSocket#setTrafficClass");
}
@Override
protected List validate(final Arguments arguments) {
return super.validate(arguments);
}
@Override
protected List usage() {
return super.usage();
}
};
private static final int BUFF_SIZE = 8192;
public static void main(final String[] array) throws Exception {
final CommandParser.Arguments arguments;
try {
arguments = cmd.parse(array);
} catch (CommandParser.HelpException e) {
System.exit(0);
throw new Exception(); // never reached, but keeps compiler happy
} catch (CommandParser.InvalidOptionsException e) {
System.exit(1);
throw new Exception(); // never reached, but keeps compiler happy
}
final Options options = arguments.options();
final SimpleDateFormat format = new SimpleDateFormat(options.get("date-format", "HH:mm:ss"));
final String host = options.get("host", "239.255.3.2");
final int port = options.get("port", 6142);
final InetAddress inetAddress = InetAddress.getByName(host);
final InetSocketAddress address = new InetSocketAddress(inetAddress, port);
final MulticastSocket multicast = new MulticastSocket(port);
multicast.joinGroup(inetAddress);
if (options.has("reuse-address")) {
multicast.setReuseAddress(options.get("reuse-address", false));
}
if (options.has("broadcast")) {
multicast.setBroadcast(options.get("broadcast", false));
}
if (options.has("loopback-mode")) {
multicast.setLoopbackMode(options.get("loopback-mode", false));
}
if (options.has("send-buffer-size")) {
multicast.setSendBufferSize(options.get("send-buffer-size", 0));
}
if (options.has("receive-buffer-size")) {
multicast.setReceiveBufferSize(options.get("receive-buffer-size", 0));
}
if (options.has("so-timeout")) {
multicast.setSoTimeout(options.get("so-timeout", 0));
}
if (options.has("time-to-live")) {
multicast.setTimeToLive(options.get("time-to-live", 0));
}
if (options.has("traffic-class")) {
multicast.setTrafficClass(options.get("traffic-class", 0));
}
System.out.println("Connected");
print("host", host);
print("port", port);
System.out.println();
System.out.println("Socket");
print("broadcast", multicast.getBroadcast());
print("loopback-mode", multicast.getLoopbackMode());
print("receive-buffer-size", multicast.getReceiveBufferSize());
print("reuse-address", multicast.getReuseAddress());
print("send-buffer-size", multicast.getSendBufferSize());
print("so-timeout", multicast.getSoTimeout());
print("time-to-live", multicast.getTimeToLive());
print("traffic-class", multicast.getTrafficClass());
System.out.println();
if (options.has("send")) {
final String send = options.get("send", "");
final long rate = options.get("rate", 1000);
System.out.println("Sending");
print("send", send);
print("rate", rate);
System.out.println();
final Send message = new Send(address, multicast, send);
if (rate > 0) {
final Timer timer = new Timer("Multicast Send", true);
timer.scheduleAtFixedRate(message, 0, rate);
} else {
message.run();
message.close();
}
}
System.out.println("Listening....");
final byte[] buf = new byte[BUFF_SIZE];
final DatagramPacket packet = new DatagramPacket(buf, 0, buf.length);
//noinspection InfiniteLoopStatement
while (true) {
try {
multicast.receive(packet);
if (packet.getLength() > 0) {
final StringBuilder sb = new StringBuilder();
sb.append(format.format(new Date()));
sb.append(" - ");
sb.append(packet.getAddress().getHostAddress());
sb.append(" - ");
final String str = new String(packet.getData(), packet.getOffset(), packet.getLength());
sb.append(str);
System.out.println(sb.toString());
}
} catch (SocketTimeoutException e) {
final StringBuilder sb = new StringBuilder();
sb.append(format.format(new Date()));
sb.append(" - ");
sb.append("ERROR");
sb.append(" - ");
sb.append(e.getMessage());
System.out.println(sb.toString());
}
}
}
private static void print(final String name, final Object value) {
System.out.printf(" %-20s: %s", name, value);
System.out.println();
}
static class Send extends TimerTask {
private final MulticastSocket multicast;
private final String text;
private final SocketAddress address;
public Send(final SocketAddress address, final MulticastSocket multicast, final String text) {
this.address = address;
this.multicast = multicast;
this.text = text;
}
@Override
protected void finalize() throws Throwable {
try {
close();
} finally {
super.finalize();
}
}
private void close() {
try {
multicast.close();
} catch (Throwable e) {
//Ignore
}
}
@Override
public void run() {
try {
final byte[] data = text.getBytes();
final DatagramPacket packet = new DatagramPacket(data, 0, data.length, address);
multicast.send(packet);
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public boolean cancel() {
close();
return super.cancel();
}
}
}
