Example of using a Java wrapper with Netty 4 to work around Clojure bug http://dev.clojure.org/jira/browse/CLJ-1183.

name.mattp.Netty.java

package name.mattp;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.bootstrap.Bootstrap;

import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ServerChannel;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.ChannelOption;
import io.netty.channel.ChannelHandlerContext;

public class Netty
{
  public static ChannelFuture close (Channel channel)
  {
    return channel.close ();
  }
  
  public static ChannelFuture flush (Channel channel)
  {
    return channel.flush ();
  }
  
  public static ChannelFuture write (Channel channel, Object message) 
  {
    return channel.write (message);
  }
  
  public static ChannelPipeline pipeline (Channel channel)
  {
    return channel.pipeline ();
  }
  
  public static ServerBootstrap channel (ServerBootstrap bootstrap, 
                                         Class<? extends ServerChannel> channelClass)
  {
    return bootstrap.channel (channelClass);
  }

  public static Bootstrap clientChannel (Bootstrap bootstrap, 
                                         Class<? extends Channel> channelClass)
  {
    return bootstrap.channel (channelClass);
  }
  
  public static Bootstrap group (Bootstrap bootstrap, EventLoopGroup group)
  {
    return bootstrap.group (group);
  }
  
  public static Bootstrap handler (Bootstrap bootstrap, 
                                   ChannelHandler handler)
  {
    return bootstrap.handler (handler);
  }
  
  public static Bootstrap option (Bootstrap bootstrap, 
                                  ChannelOption option,
                                  Object value)
  {
    return bootstrap.option (option, value);
  }
  
  public static ChannelPipeline pipeline (ChannelHandlerContext ctx)
  {
    return ctx.pipeline ();
  }
}