io.nadron.server.netty.NettyUDPServer Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of nadron Show documentation

Nadron is a high speed socket based java game server written using Netty and Mike Rettig's Jetlang. It is specifically tuned for network based multiplayer games and supports TCP and UDP network protocols.

There is a newer version: 0.7

Show newest version

package io.nadron.server.netty;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.socket.nio.NioDatagramChannel;

import java.util.Map;
import java.util.Set;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * This server does UDP connection less broadcast. Since it does not store the
 * connection, each call to a channel write must also contain the remote socket
 * address e.getChannel().write("Message", e.getRemoteAddress()).
 * Since it uses the same channel for all incoming connections, the handlers
 * cannot be modified refer to nabble
 * post
 * 
 * @author Abraham Menacherry
 * 
 */
public class NettyUDPServer extends AbstractNettyServer 
{
	private static final Logger LOG = LoggerFactory
			.getLogger(NettyUDPServer.class);
	private Bootstrap bootstrap;
	
	public NettyUDPServer(NettyConfig nettyConfig, ChannelInitializer channelInitializer) 
	{
		super(nettyConfig, channelInitializer);
	}

	@SuppressWarnings("unchecked")
	@Override
	public void startServer() throws Exception 
	{
		try 
		{
			bootstrap = new Bootstrap();
			Map, Object> channelOptions = nettyConfig
					.getChannelOptions();
			if (null != channelOptions) 
			{
				Set> keySet = channelOptions.keySet();
				for (@SuppressWarnings("rawtypes") ChannelOption option : keySet) 
				{
					bootstrap.option(option, channelOptions.get(option));
				}
			}
			Channel channel = bootstrap.group(getBossGroup())
					.channel(NioDatagramChannel.class)
					.handler(getChannelInitializer())
					.bind(nettyConfig.getSocketAddress()).channel();
			// Check if all channels need be closed.
			ALL_CHANNELS.add(channel);
		} 
		catch (Exception e) 
		{
			LOG.error("UDP Server start error {}, going to shut down", e);
			super.stopServer();
			throw e;
		}
	}

	@Override
	public TransmissionProtocol getTransmissionProtocol() 
	{
		return TRANSMISSION_PROTOCOL.UDP;
	}

	@Override
	public String toString() 
	{
		return "NettyUDPServer [socketAddress=" + nettyConfig.getSocketAddress()
				+ ", portNumber=" + nettyConfig.getPortNumber() + "]";
	}

	@Override
	public void setChannelInitializer(
			ChannelInitializer initializer) 
	{
		this.channelInitializer = initializer;
		bootstrap.handler(initializer);
	}

}