netty udp

package client;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioDatagramChannel;


/**
 * Created by crised on 6/15/14.
 */
//es cliente, pero tambien es servidor porque escucha mensaje devuelta.
public class Client {

    public static void main(String[] args) throws Exception {

        EventLoopGroup group = new NioEventLoopGroup();
        try {
            Bootstrap b = new Bootstrap();
            b.group(group)
                    .channel(NioDatagramChannel.class)
                    .option(ChannelOption.SO_BROADCAST, true)
                    .handler(new ChannelInitializer<DatagramChannel>() {
                        @Override
                        public void initChannel(DatagramChannel ch) throws  Exception{
                            ch.pipeline().addLast(new OutboundHandler());
                        }
                    });

            b.bind(0);

        } finally {
            group.shutdownGracefully();
        }
    }
}

package client;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelOutboundHandlerAdapter;
import io.netty.channel.ChannelPromise;
import io.netty.channel.socket.DatagramPacket;
import io.netty.util.CharsetUtil;

import java.net.InetSocketAddress;
import java.net.SocketAddress;

/**
 * Created by crised on 6/15/14.
 */
public class OutboundHandler extends ChannelOutboundHandlerAdapter{

    @Override
    public void bind(ChannelHandlerContext ctx, SocketAddress localAddress, ChannelPromise promise) throws Exception {

        System.out.println("Bind happened");

        InetSocketAddress ipSocketAddress = new InetSocketAddress("255.255.255.255", 7686);

        ByteBuf byteBuf = Unpooled.copiedBuffer("QOTM?", CharsetUtil.UTF_8);

        DatagramPacket udpPacket = new DatagramPacket(byteBuf, ipSocketAddress);

        ChannelFuture future = ctx.writeAndFlush(udpPacket);
        System.out.println(future.isDone());
        ctx.close();
        System.out.println("bind method ended");

    }

    @Override
    public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
        System.out.println("Write operation has been done");
    }

}