code: protected <T, A> void handleRequest(final Channel channel, final DataInput message, final ManagementProtocolHeader header, ActiveRequest<T, A> activeRequest) {
          handleMessage(channel, message, header, activeRequest.context, activeRequest.handler);
      }
docs: Handle a message.
  
  @param channel the channel
  @param message the message
  @param header the protocol header
  @param activeRequest the active request