[Freeswitch-dev] Share data between modules

Fri Oct 19 17:07:58 MSD 2012

any objections to just removing the mod completely from tree?

On Oct 18, 2012, at 1:49 PM, Anthony Minessale <anthony.minessale at gmail.com>
wrote:

I mean loading it into FS at all puts you at risk of crashing.

ZMQ pretends to be a socket but really is a complicated series of threads
all using sockets to talk to each other.  You only see one, its designed
expecting the main thread of your app to be the star of the app.  The way
its used in FS loading it into a mod puts it at risk because if any thread
in FS calls fork for any reason, all of the zmq threads also fork and cause
segs.

Doing it on the other side of ESL is safer since you are not loading the
lib into the process.

On Thu, Oct 18, 2012 at 12:28 PM, João Mesquita <jmesquita at freeswitch.org>wrote:

> Tony,
>
> If I understood you correctly, using ZMQ more extensively other than an
> event consumer will never work right but the mod as it is with the proper
> thread safety implementation would work just fine correct?
>
> What I find very debatable is that the beauty of ZMQ is implementing your
> own protocol for service based brokers and such fancy things other than
> just broadcasting messages like it is doing right now and since the
> protocol implementation is something very dependent on the application
> itself, a standard mod is questionable. The way I do it is have my own
> daemon that uses ESL to consume events and do ZMQ on the other end. Much
> like a proxy.
>
> Anyhow, just wanted to add to the discussion.
>
> Sent from my iPhone
>
> On Oct 18, 2012, at 1:14 PM, Anthony CTO <anthony.minessale at gmail.com>
> wrote:
>
> ZMQ and FS are never going to work well....
>
> There are many problems such as, any call to fork in FS like when it execs
> the system commands or tries to email a VM results in segs.
>
> ZMQ has a firm belief in no mutexes and sockets for threads to do
> interprocess communication.  I don't have anything against that but it does
> not match the FS philosophy at all.
>
> All that aside,
>
> mod_event_zmq sends only events  if you want to send data from a module
> via that, just create and fire an event.
>
>
> On Thu, Oct 18, 2012 at 9:07 AM, João Mesquita <jmesquita at freeswitch.org>wrote:
>
>> I guess a solution would be to re queue the events again and pop on the
>> thread that owns the ZMQ context. Shouldn't be too hard although there
>> would be locking problems on the queue.
>>
>> Regards,
>> JM
>>
>> Sent from my iPhone
>>
>> On Oct 17, 2012, at 8:52 AM, Peter Olsson <
>> peter.olsson at visionutveckling.se> wrote:
>>
>>  I believe the threading model in zmq is different, that it really
>> doesn’t work well together with FreeSWITCH’s threading model.****
>>
>> ** **
>>
>> If I’ve understood this correctly, for instance when you send a message
>> using zmq, the library takes for granted that this is always done from the
>> same thread. However, inside FS it means it might be sent from different
>> threads, since the event system inside FS has multiple threads to pop the
>> queued events.****
>>
>> ** **
>>
>> Tony, probably has a more correct description – I’ve never even used zmq
>> myself :)****
>>
>> ** **
>>
>> /Peter****
>>
>> ** **
>>
>> *Från:* freeswitch-dev-bounces at lists.freeswitch.org [
>> mailto:freeswitch-dev-bounces at lists.freeswitch.org<freeswitch-dev-bounces at lists.freeswitch.org>]
>> *För *Juan Antonio Ibañez Santorum
>> *Skickat:* den 17 oktober 2012 13:37
>> *Till:* freeswitch-dev at lists.freeswitch.org
>> *Ämne:* Re: [Freeswitch-dev] Share data between modules****
>>
>> ** **
>>
>> Any idea to improve it? ****
>>
>> 2012/10/16 Anthony Minessale <anthony.minessale at gmail.com>****
>>
>> You should do that by firing events from your module so they are
>> delivered via mode_event_zmq.****
>>
>> Beware zmq is unstable in FS because its a threaded app and zmq is a
>> different threading model.****
>>
>> ** **
>>
>> On Tue, Oct 16, 2012 at 3:44 PM, Juan Antonio Ibañez Santorum <
>> juanito1982 at gmail.com> wrote:****
>>
>> The idea is to get some internal data from an own module to be served via
>> mod_event_zmq.****
>>
>> ** **
>>
>> Regards****
>>
>> ** **
>>
>> ** **
>>
>> ** **
>>
>> 2012/10/16 Anthony Minessale <anthony.minessale at gmail.com>****
>>
>> Can you provide context on which 2 modules you want to do this with?****
>>
>> Its not a good design to allow loadable modules to require symbols from
>> each other.****
>>
>> ** **
>>
>> On Tue, Oct 16, 2012 at 12:48 PM, Juan Antonio Ibañez Santorum <
>> juanito1982 at gmail.com> wrote:****
>>
>> Do you refer to mod_hash? How can I call its API functions from another
>> module? Is it possible to save C data structures, not only stirng values?
>> ****
>>
>> ** **
>>
>> Regards****
>>
>> ** **
>>
>> 2012/10/16 Mitch Capper <mitch.capper at gmail.com>****
>>
>> Check out the hash api it can do exactly what you want, suggest
>> prefixing all your entries to keep it clean and avoid conflicts.
>>
>> ~Mitch****
>>
>>
>> On Tue, Oct 16, 2012 at 8:45 AM, Juan Antonio Ibañez Santorum
>> <juanito1982 at gmail.com> wrote:
>> > Hello,
>> >
>> >    Is there any way to share data (as a hash) between modules? I can see
>> > switch_core_set_variable() function but I think it cannot be used for
>> that
>> > purpose.
>> >
>> > Regards
>> >****
>>
>> >
>> _________________________________________________________________________
>> > Professional FreeSWITCH Consulting Services:
>> > consulting at freeswitch.org
>> > http://www.freeswitchsolutions.com
>> >
>> > 
>> > 
>> >
>> > Official FreeSWITCH Sites
>> > http://www.freeswitch.org
>> > http://wiki.freeswitch.org
>> > http://www.cluecon.com
>> >
>> > FreeSWITCH-dev mailing list
>> > FreeSWITCH-dev at lists.freeswitch.org
>> > http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
>> > UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
>> > http://www.freeswitch.org
>> >
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-dev mailing list
>> FreeSWITCH-dev at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
>> http://www.freeswitch.org****
>>
>> ** **
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-dev mailing list
>> FreeSWITCH-dev at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
>> http://www.freeswitch.org****
>>
>>
>>
>> ****
>>
>> ** **
>>
>> --
>> Anthony Minessale II
>>
>> FreeSWITCH http://www.freeswitch.org/
>> ClueCon http://www.cluecon.com/
>> Twitter: http://twitter.com/FreeSWITCH_wire
>>
>> AIM: anthm
>> MSN:anthony_minessale at hotmail.com
>> GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
>> IRC: irc.freenode.net #freeswitch
>>
>> FreeSWITCH Developer Conference
>> sip:888 at conference.freeswitch.org
>> googletalk:conf+888 at conference.freeswitch.org
>> pstn:+19193869900****
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-dev mailing list
>> FreeSWITCH-dev at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
>> http://www.freeswitch.org****
>>
>> ** **
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-dev mailing list
>> FreeSWITCH-dev at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
>> http://www.freeswitch.org****
>>
>>
>>
>> ****
>>
>> ** **
>>
>> --
>> Anthony Minessale II
>>
>> FreeSWITCH http://www.freeswitch.org/
>> ClueCon http://www.cluecon.com/
>> Twitter: http://twitter.com/FreeSWITCH_wire
>>
>> AIM: anthm
>> MSN:anthony_minessale at hotmail.com
>> GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
>> IRC: irc.freenode.net #freeswitch
>>
>> FreeSWITCH Developer Conference
>> sip:888 at conference.freeswitch.org
>> googletalk:conf+888 at conference.freeswitch.org
>> pstn:+19193869900****
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-dev mailing list
>> FreeSWITCH-dev at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
>> http://www.freeswitch.org****
>>
>>
>> !DSPAM:507e958b32763975712591! ****
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-dev mailing list
>> FreeSWITCH-dev at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
>> http://www.freeswitch.org
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-dev mailing list
>> FreeSWITCH-dev at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
>> http://www.freeswitch.org
>>
>>
>
>
> --
> Anthony Minessale II
>
> FreeSWITCH http://www.freeswitch.org/
> ClueCon http://www.cluecon.com/
> Twitter: http://twitter.com/FreeSWITCH_wire
>
> AIM: anthm
> MSN:anthony_minessale at hotmail.com
> GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
> IRC: irc.freenode.net #freeswitch
>
> FreeSWITCH Developer Conference
> sip:888 at conference.freeswitch.org
> googletalk:conf+888 at conference.freeswitch.org
> pstn:+19193869900
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://wiki.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-dev mailing list
> FreeSWITCH-dev at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
> http://www.freeswitch.org
>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://wiki.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-dev mailing list
> FreeSWITCH-dev at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
> http://www.freeswitch.org
>
>

-- 
Anthony Minessale II

FreeSWITCH http://www.freeswitch.org/
ClueCon http://www.cluecon.com/
Twitter: http://twitter.com/FreeSWITCH_wire

AIM: anthm
MSN:anthony_minessale at hotmail.com
GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
IRC: irc.freenode.net #freeswitch

FreeSWITCH Developer Conference
sip:888 at conference.freeswitch.org
googletalk:conf+888 at conference.freeswitch.org
pstn:+19193869900

_________________________________________________________________________
Professional FreeSWITCH Consulting Services:
consulting at freeswitch.org
http://www.freeswitchsolutions.com

Official FreeSWITCH Sites
http://www.freeswitch.org
http://wiki.freeswitch.org
http://www.cluecon.com

FreeSWITCH-dev mailing list
FreeSWITCH-dev at lists.freeswitch.org
http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
http://www.freeswitch.org
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.freeswitch.org/pipermail/freeswitch-dev/attachments/20121019/1b279690/attachment-0001.html 