this.port = port;
}
public void run() {
DatagramChannelFactory f =
new NioDatagramChannelFactory(Executors.newCachedThreadPool());
ConnectionlessBootstrap b = new ConnectionlessBootstrap(f);
// Configure the pipeline factory.
b.setPipelineFactory(new ChannelPipelineFactory() {
public ChannelPipeline getPipeline() throws Exception {
return Channels.pipeline(
new StringEncoder(CharsetUtil.ISO_8859_1),
new StringDecoder(CharsetUtil.ISO_8859_1),
new QuoteOfTheMomentClientHandler());
}
});
// Enable broadcast
b.setOption("broadcast", "true");
// Allow packets as large as up to 1024 bytes (default is 768).
// You could increase or decrease this value to avoid truncated packets
// or to improve memory footprint respectively.
//
// Please also note that a large UDP packet might be truncated or
// dropped by your router no matter how you configured this option.
// In UDP, a packet is truncated or dropped if it is larger than a
// certain size, depending on router configuration. IPv4 routers
// truncate and IPv6 routers drop a large packet. That's why it is
// safe to send small packets in UDP.
b.setOption(
"receiveBufferSizePredictorFactory",
new FixedReceiveBufferSizePredictorFactory(1024));
DatagramChannel c = (DatagramChannel) b.bind(new InetSocketAddress(0));
// Broadcast the QOTM request to port 8080.
c.write("QOTM?", new InetSocketAddress("255.255.255.255", port));
// QuoteOfTheMomentClientHandler will close the DatagramChannel when a
// response is received. If the channel is not closed within 5 seconds,
// print an error message and quit.
if (!c.getCloseFuture().awaitUninterruptibly(5000)) {
System.err.println("QOTM request timed out.");
c.close().awaitUninterruptibly();
}
f.releaseExternalResources();
}