Netty Discard server ported to jruby

gistfile1.rb

require 'java'
require 'jar/netty-3.3.1.Final.jar'

import 'java.net.InetSocketAddress'
import 'java.util.concurrent.Executors'
import 'org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory'
import 'org.jboss.netty.bootstrap.ServerBootstrap'
import 'org.jboss.netty.channel.SimpleChannelHandler'
import 'org.jboss.netty.channel.ChannelPipelineFactory'
import 'org.jboss.netty.channel.ChannelFactory'
import 'org.jboss.netty.channel.Channels'

class DiscardHandler < SimpleChannelHandler
  def exceptionCaught(ctx, e)
    puts e.cause.print_stacktrace
    e.channel.close
  end 
  def messageReceived(ctx, msg)
    puts "received message: #{msg}"
  end 
end
class Pipelinefactory
  include ChannelPipelineFactory
  def get_pipeline
    Channels.pipeline(DiscardHandler.new)
  end 
end
class DiscardServer
  def initialize
    factory =NioServerSocketChannelFactory.new( Executors.new_cached_thread_pool, Executors.new_cached_thread_pool)
    @bootstrap = ServerBootstrap.new(factory)
    @bootstrap.pipeline_factory=Pipelinefactory.new
    @bootstrap.set_option('child.tcpNoDelay', true)
    @bootstrap.set_option('child.keepAlive', true)
  end 

  def start
    @bootstrap.bind(InetSocketAddress.new(2020))
  end 

end

DiscardServer.new.start