[Haskell-cafe] how to add monad-stack to network-conduit

[Michael Snoyman]

On Tue, Feb 21, 2012 at 5:10 PM, Alexander V Vershilov
<alexander.vershilov at gmail.com> wrote:
> Hello.
>
> I have got next problem: I want to have database connection pool
> in server based on network-conduit.
> So I wanted to be able to do
>
>> runTCPServer options action
>>   where
>>     action src snk =
>>       pool <- ask
>>       ....
>>
>
> In this situation I can make pool `action's parameter, but in more
> difficult situations (many methods inside) is would be painfull.
>
> Also I wanted to have some kind of State for each thread, e.g.
>
>> action src snk = src $= act1 $= act2 $= act3 $$ snk
>
> in act1, act2, act3 I want to read and change state.
>
> Is it possible? And how to do it if it is?
>
> --
> Alexander Vershilov
>
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It should just be a matter of relaxing the type signatures in
network-conduit. I'll include that in the next release.

Michael