[Freeswitch-users] ESL asynchronous use

Tue Nov 16 21:48:51 UTC 2021

I didn’t see a C/C++ interface to this, also adds another layer (REST)…and I think is commercial which I can’t do at this point since I’m just doing proof of concept.

From: FreeSWITCH-users [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Anthony Minessale
Sent: Sunday, November 14, 2021 11:02 AM
To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
Subject: Re: [Freeswitch-users] ESL asynchronous use

You might like SignalWire RELAY which is a serverless call control API

https://docs.signalwire.com/topics/relay/#relay-documentation

On Sun, Nov 14, 2021 at 2:27 AM Telium Technical Support <support at telium.io <mailto:support at telium.io> > wrote:

I looked at the ESL C code and I *THINK* that I have to poll using the esl_recv_event_timed function (to look for the SESSION_HEARTBEAT event).

Is there already a callback function that I can hook into to be notified of events?  If not, at which frequency should I poll for events (sleep inbetween) based on anyones experience?  I don’t like blocking code so I’m hoping there is already a callback function setup.

Or is there some other way to handle this?

From: FreeSWITCH-users [mailto:freeswitch-users-bounces at lists.freeswitch.org <mailto:freeswitch-users-bounces at lists.freeswitch.org> ] On Behalf Of Guillermo Ruiz Camauer
Sent: Friday, November 12, 2021 8:31 AM
To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org <mailto:freeswitch-users at lists.freeswitch.org> >
Subject: Re: [Freeswitch-users] ESL asynchronous use

There is a SESSION_HEARTBEAT event that you can monitor to see if FS has stopped responding.  It also has a lot of other useful information.

Guillermo

On Thu, Nov 11, 2021 at 8:56 PM Telium Technical Support <support at telium.io <mailto:support at telium.io> > wrote:

No crash, just learning how to use the ESL.  I strongly prefer async design, so wondering if connect and disconnect have some sort of success/failure callback.

Or is the only way to check success to send a command over the socket?

Same with disconnect, do we need to wait for a send failure?

From: Brian West [mailto:brian at freeswitch.com <mailto:brian at freeswitch.com> ] 
Sent: Thursday, November 11, 2021 8:46 AM
To: Telium Technical Support <support at telium.io <mailto:support at telium.io> >
Cc: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org <mailto:freeswitch-users at lists.freeswitch.org> >
Subject: Re: [Freeswitch-users] ESL asynchronous use

If you have a crash you should perform a back trace and submit an issue on github.

/b

On Wed, Nov 10, 2021 at 7:50 PM Telium Technical Support <support at telium.io <mailto:support at telium.io> > wrote:

I’m trying to figure out asynchronous use of the ESL (from C).  If I call esl_connect_timeout with a timeout of 0, what happens if the connection is not made immediately?  Is there some callback function indicating success/failure?

If the esl connection is lost (FreeSwitch crashes), is there a callback function indicating the lost connection?  Or do I need to issue a status/keepalive to ensure function succeeds?

Looking a bit at the esl.c code I’m wondering if the above are synchronous only…(polling for status)

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_________________________________________________________________________

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Build your next product on our scalable cloud platform.

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