How to use

attachHost

method

in

com.mpush.netty.http.HttpConnectionPool

private void writeRequest(Channel channel, RequestContext context) {
  channel.attr(requestKey).set(context);
  pool.attachHost(context.host, channel);
  channel.writeAndFlush(context.request).addListener((ChannelFutureListener) future -> {
    if (!future.isSuccess()) {
      RequestContext info = future.channel().attr(requestKey).getAndSet(null);
      info.tryDone();
      info.onFailure(503, "Service Unavailable");
      LOGGER.debug("request failure request={}", info);
      pool.tryRelease(future.channel());
    }
  });
}