Proper way to handle async callbacks?

["이희승 (Trustin Lee)"]

kylar wrote:
> Here's my scenario: I've got a custom protocol built on HTTP. I've started a
> netty server that has two custom handlers after the http ones in the
> pipeline:
> 
>       pipeline.addLast("decoder", new HttpRequestDecoder(1024, 10240,
> 32768));
>       pipeline.addLast("aggregator", new HttpChunkAggregator(1048576));
>       pipeline.addLast("encoder", new HttpResponseEncoder());
>       pipeline.addLast("deflater", new HttpContentCompressor());
>       pipeline.addLast("authenticator", new AuthenticationHandler());
>       pipeline.addLast("handler", new MyProtocolServiceHandler());
> 
> in AuthenticationHandler (a SimpleChannelUpstreamHandler) 's
> messageRecieved, I check to see if the user has an Authentication: header,
> and if so, I call out to an external authentication service, using an
> asynchronous client (a com.ning.http.client.AsyncHttpClient), which I pass a
> callback too. When the authentication request returns, I want to pass the
> ChannelHandlerContext and original HttpMessage on to the next handler. Right
> now, I'm just calling 
> 
> 
>     Channels.fireMessageReceived(context, result, remoteAddress);
> 
> - But I think this is getting executed by the AsyncHttpClient 's thread
> instead of one of the Netty container's threads. 
> 
> So my questions are:
> 
> #1) Is there a way to throw this request back into the proper pool?

Not yet unfortunately.  Feature planned in 4.0.

> #2) Do I need to have an additional set of threads to handle these requests
> without tying up the async clients?

Yes for now.

-- 
Trustin Lee - http://gleamynode.net/


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