[erlang-questions] about the use of parametrized modules

Hynek Vychodil <>
Sat Jan 15 21:17:50 CET 2011


OTP stdlib module io is doing principally same and doesn't need
parametrized module.

On Sat, Jan 15, 2011 at 7:23 PM, Max Lapshin <> wrote:
> I can tell why I use parameterized modules in erlyvideo.
>
> This is list of module chain, where functions are called:
>
> {rtmp_handlers, [apps_login, apps_streaming]}.
>
> rtmp_session is calling in such manner:  Module:connect(Session, Funcall)
>
> Now we need a configurable module:  auth_users_limit. It requires
> somehow to store additional configuration variable: limit of users.
> The easies solution for me seems to store it as a parameter for module:
>
> {rtmp_handlers, [{auth_users_limit, 100}, apps_login, apps_streaming]}
>
> After that nothing is changed in rtmp_session:
> Module:connect(Session, Funcall), but Module now is just a tuple from
> config: {auth_users_limit, 100}.
>
> It happened to be very convenient.
>
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-- 
--Hynek (Pichi) Vychodil

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