public void init(ChannelPipelineFactory factory) throws Exception {
id =
String.format("%1$020d", Math.abs(new Random(System.currentTimeMillis()).nextLong()))
.getBytes();
group = new OioEventLoopGroup();
connectionlessBootstrap = new Bootstrap();
connectionlessBootstrap.group(group);
connectionlessBootstrap.option(ChannelOption.SO_BROADCAST, true);
connectionlessBootstrap.handler(factory);
connectionlessBootstrap.channel(OioDatagramChannel.class);
;
datagramChannel =
(DatagramChannel)
connectionlessBootstrap.bind(new InetSocketAddress(mcastGroupPort)).sync().channel();
multicastAddress = new InetSocketAddress(mcastGroupIp, mcastGroupPort);
NetworkInterface networkInterface =
NetworkInterface.getByInetAddress(InetAddress.getByName(bindAddress));
// for (Enumeration nifs = NetworkInterface.getNetworkInterfaces();
// nifs.hasMoreElements(); )
datagramChannel.joinGroup(multicastAddress, null); // (NetworkInterface)
// nifs.nextElement());
init = true;
if (debug) factory.debug();
}
public void close() {
datagramChannel.close();
try {
group.shutdownGracefully().sync();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
public void send(ByteBuf msg) throws Exception {
byte[] arr = msg.array();
byte[] buf = new byte[arr.length + id.length];
System.arraycopy(id, 0, buf, 0, id.length);
System.arraycopy(arr, 0, buf, id.length, arr.length);
ByteBuf bbuf = Unpooled.wrappedBuffer(buf);
if (debug && logger != null) logger.info("discovery send " + new String(bbuf.array()));
datagramChannel.writeAndFlush(new DatagramPacket(bbuf, multicastAddress)).sync();
// datagramChannel.writeAndFlush(buf, multicastAddress);
}
