Re: [Haskell-cafe] How to design an network client with user program.

On Wed, Apr 10, 2013 at 2:08 PM, Alexander V Vershilov < alexander.vershilov@gmail.com> wrote:

On 10 April 2013 14:56, Michael Snoyman wrote:

...

It doesn't seem like you're trying to perform multiple actions simultaneously. For example, you don't need to be able to read from the server and send data back at the same time. Instead, you'll have a single thread of execution. Am I right?

Not exaclty, user code is not only SeverMessage driven but can generate messages and works on it's own (time-events, or some external events). For example user code may generate random messages even there is no message from server, (i.e. wait for some timeout and then feed sender with message), or do some long running events, (e.g. wait for 5 minutes), in both of those cases one threaded pipeline is broken.

Then some kind of TQueue or TChan approach is going to be necessary.