[asterisk-users] (fast) AGI and AMI synchronization ?

[Corentin Le Gall]

OK, I found my problem.
I don't really know why I did not receive AMI events during the few tests
I did, actually, but as for my original issue, the key point is that I use
select() with fds instead of threads. In this case, the order in which the
fds are put in the "fd set" matters. The AGI fd was prior to the AMI one,
thus gave this asynchronous impression ...
Thanks for the answers, though.

Corentin LE GALL
Proformatique (Groupe Avencall) - 10bis rue Lucien Voilin - F-92800 Puteaux
Tel (+33/0)1.41.38.99.60 - Fax (+33/0)1.41.38.99.70
http://wiki.xivo.fr


> You can use threads and queues in your program to interface with AMI. Your
> main thread should get all the events from * and based on some logic enqueue
> it. Some other thread should be listening to the queue and in that thread
> you are free to read the input whenever you want. This way you are free to
> keep listening from the AMI as fast as you can and also your other thread
> will process them at its own pace.
> 
> Cheers
> 
> On Tue, Mar 8, 2011 at 5:27 PM, Faisal Hanif <faisal at vopium.com> wrote:
> 
> > AMI is single threaded link so waiting on it will bring things to hang mode
> > but FastAGI & dialplan is multithread. Better to manage all info by AMI in
> > a
> > local hash or array and use sleep/waiting on AGI till required info
> > populated to hash/array by AMI.
> >
> > -----Original Message-----
> > From: asterisk-users-bounces at lists.digium.com
> > [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Corentin Le
> > Gall
> > Sent: Tuesday, March 08, 2011 4:31 PM
> > To: asterisk-users at lists.digium.com
> > Subject: [asterisk-users] (fast) AGI and AMI synchronization ?
> >
> > Hi,
> >
> > I've been developing some CTI software around asterisk for a while, mainly
> > with the help of AMI and fast AGI.
> > It works quite fine, but I have some trouble sometimes with the
> > un-synchronized property of these 2.
> > Let me explain, we have a dialplan like this one :
> >
> > exten = s,n,UserEvent(useful_input_data)
> > (...) a few actions
> > exten = s,n,AGI(agi://127.0.0.1:3333/fetch,queuename)
> >
> > The idea is to setup a "cti server" that talks with both AMI and AGI
> > channels, the first one mainly when one just want to send some data from
> > asterisk to the "cti server", and the second one when the dialplan needs
> > some data from this server.
> >
> > My issue is that the AGI requests are received (from the CTI server point
> > of
> > vue) a little bit before the AMI events. In most cases, I don't really care
> > because it is only "a little", and the data asterisk needs to fetch from
> > the
> > AGI are set on time. But sometimes not, especially in cases like above,
> > when
> > there are only a few dialplan lines between UserEvent and AGI ...
> >
> > In order to handle that, I thought "let's make a sync/meeting point, with
> > the help of the AMI NewExten event, when the app is AGI".
> > The idea would be to keep the AGI connection open as long as the good AMI
> > NewExten event is not received, then to reply and close it, in order for
> > the
> > dialplan to proceed.
> > However, when trying to do this, nothing more occurs on the AMI connection,
> > thus I come to a deadlock ...
> >
> > My question is then, before switching to -dev issues : is there an option
> > somewhere to handle this, whether on the AMI or on the AGI side ?
> > The asterisk version we've been using for a long time is 1.4 and my current
> > attempts are done on 1.8 branch.
> >
> > Thanks,
> > --
> > Corentin LE GALL
> > Proformatique (Groupe Avencall) - 10bis rue Lucien Voilin - F-92800 Puteaux
> > Tel (+33/0)1.41.38.99.60 - Fax (+33/0)1.41.38.99.70 http://wiki.xivo.fr
> >
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> 
> 
> -- 
> Best Ragards
> Rizwan Qureshi
> VoIP/Asterisk Engineer
> Axvoice Inc.
> V: +92 (0) 3333 6767 26
> E: rizwanhasham at gmail.com
> W: www.axvoice.com