[Freeswitch-dev] MOH in async mode is possible?

Vu Quang Hoa vutamhoan at gmail.com
Fri Oct 7 04:54:52 MSD 2011


Thanks Anthony,

I sent this message before chat with you on irc. Of cause I tried to search
& search many time before asking you (I love Google) and I had already tried
ESL but it still blocks any LUA session call (like session:foo()).

Now I'm trying to implement MOH with async mode like record_session concept
(using mod_soundtouch sample code).

Hope that it will be ready within few days.

-vutamhoan

On Thu, Oct 6, 2011 at 10:08 PM, Anthony Minessale <
anthony.minessale at gmail.com> wrote:

> I believe I already answered this question when you asked on irc.  But
> I'll answer it again so it can be logged.
>
> To put it simply you are barking up the wrong tree trying to do
> asynchronous things from a lua script.
> Change your paradigm in your brain to think about it more like a GUI loop.
>
> You only have 1 thread and you want to make the channel do something
> by itself in the background but your script is already executing....
>
>
> If you want this you need 2 threads.  There are several ways to get
> this but you have to choose one.
>
>
> 1) Use ESL and an external application that can be running in your own
> process so you can perform async operations.
> 2) Send the channel to the "park" app but spawn your lua script with
> luarun via the dialplan variable.
>
> <action application="eval" data="${luarun myscript.lua ${uuid}}"/>
> <action application="park"/>
>
> Then use the uuid argv[0] as the arg to a new session constructor that
> will hook the channel to your object and you can tell the channel to
> do things as long as you only execute them async
> session:execute("foo::bar")
> Remember if you are not running the session in its own thread this
> will block and the whole idea is sort of messy but its possible to do
> this.. if you script dies for instance your channel will not hangup.
>
>
>
> 3) Write your program in C where you have full access to threads
> etc..... (THIS IS THE BEST CHOICE IMHO)
>
>
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> On Tue, Oct 4, 2011 at 7:46 PM, Vu Quang Hoa <vutamhoan at gmail.com> wrote:
> > Hi everyone,
> > I've been trying ways to provide MOH in background of Lua script
> (searching
> > and found few way) but none of them really satisfied me. I think it
> > may implement in the same way of record_session function. So I need
> > your advises if it is possible or not? It's a really good idea?
> > Thank you!
> > vutamhoan
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>
>
>
> --
> Anthony Minessale II
>
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