title: Handling response from server in Netty client
body: <p>I'm writing a JavaFX application using Netty to implement a custom protocol. There is no session state but I would like to correlate a server response to a particular outbound request (and return the result to the correct JavaFX <code>Task</code>.) So far I haven't been able to do so in the client code, because the responseFuture is a <code>ChannelFuture&lt;Void&gt;</code>.</p>
  
  <pre><code>future = tcpBoostrap.connect(address, 3333).sync();
  final Channel channel = future.awaitUninterruptibly().channel();
  
  ChannelFuture responseFuture = channel.writeAndFlush(requestBuilder.build());
  responseFuture.addListener(new ChannelFutureListener() {
      @Override
      public void operationComplete(ChannelFuture channelFuture) throws Exception {
          if (channelFuture.isSuccess()) {
              logger.debug("completed operation: {}", channelFuture.toString());
          }
      }
  });
  </code></pre>
  
  <p>I tried looking how to configure a <code>PipeLine</code> to somehow install <code>ChannelHandlers</code> that would share the information in a shared context variable but I could not find anything significant. </p>
  
  <p>Can anyone suggest the idiomatic place where I can stuff the UI Task that I can "complete" with the response in Netty?</p>