[Freeswitch-users] [Freeswitch-dev] Seeking collaborators for FreeSWITCH/Lua scripting toolkit

Thu Jan 28 11:08:42 MSK 2016

Good day, I have a question for Chad. Is Jester good only for writing
IVR-menu? I'm planning to write dialplan in lua this days, for incoming and
outgoing calls. So I want tot know pros and cons of Jester, where I can use
it, it is good for what?

2016-01-28 3:02 GMT+05:00 Anthony Minessale <anthony.minessale at gmail.com>:

> Lets avoid going offtopic in threads:
>
> UserA: I would like to have a pool party, who wants to come?
> UserB: Why would you have a party in a pool.  The beach is much better.
> UserA: I feel the pool is cleaner and has warmer water.
> UserB: Only fools swim in unnatural bodies of water.  A real lake is much
> better.
> UserA: I've always enjoyed pools and had fun swimming in them.
> UserB: Let me demonstrate how to properly have a beach party.
>
> Lets keep things in context.  If he said he wants to find collaborators to
> build IVR driven by hamster wheel, its not relevant if its a good idea or
> not.
> I'm sure there are valuable opinions here but we should save it for when
> they are asked for.
>
>
>
>
>
> On Wed, Jan 27, 2016 at 3:49 PM, Stanislav Sinyagin <ssinyagin at gmail.com>
> wrote:
>
>> well, maybe I just dislike Lua :)
>>
>> but the approach that I described is not only about performance, but
>> also about fault tolerance, and probably also a geographically
>> distributed scenario. If properly designed, it could give much better
>> flexibility and scalability.
>>
>>
>>
>> On Wed, Jan 27, 2016 at 7:13 PM, Chad Phillips <chad at apartmentlines.com>
>> wrote:
>> > Stanislav,
>> >
>> > I'm guessing I could count on one hand the number of times any of my
>> > production systems have had to process 30 calls in one second, and I've
>> been
>> > using FreeSWITCH since the earliest releases in a mission critical
>> > application for my primary telecom business.
>> >
>> > I can certainly appreciate that some FreeSWITCH users need to think at
>> giant
>> > scale and about how they can squeeze every last ounce of performance
>> out of
>> > their instances, I've just never had to do it. Perhaps this experience
>> > reflects in my library. :)
>> >
>> > Still, I'm not convinced that doing it the way I have costs a lot in
>> > performance. I think it would be interesting to whip up a few simple
>> load
>> > testing scenarios, and run one set via dialplan only or dialplan with
>> > focused Lua scripts, and another set through Jester. Do you have any
>> > thoughts on what that set of scenarios might look like to effectively
>> gauge
>> > the performance difference?
>> >
>> > Chad
>> >
>> > On Mon, Jan 25, 2016 at 4:13 PM, Stanislav Sinyagin <
>> ssinyagin at gmail.com>
>> > wrote:
>> >>
>> >> Chad,
>> >>
>> >> if it's a daemon that stays in memory, it doesn't need to be written
>> >> in C. It just needs to handle concurrent requests efficiently. It
>> >> could be anything like python, perl, java... or golang which beats
>> >> them in performance because it's compiled into native code. But the
>> >> bottleneck would anyway be in I/O or database lookups, so it should
>> >> simply be the language which you master the best.
>> >>
>> >> The nice thing about ESL is that it allows you to build a clusterized
>> >> environment, with separated functional nodes and easily scalable. Then
>> >> you may, for example, keep FreeSWITCH on a physical CPU churning its
>> >> real-time tasks, and the application logic on a set of virtual
>> >> machines with less-demanding SLA.
>> >>
>> >> I know some guys who implement this with Node.js. I'm not sure it's
>> >> the right choice, but still it shows adequate performance.
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >> On Mon, Jan 25, 2016 at 11:20 PM, Chad Phillips <
>> chad at apartmentlines.com>
>> >> wrote:
>> >> > Stanislav,
>> >> >
>> >> > Back when I originally wrote Jester, we did some basic load testing
>> of
>> >> > the
>> >> > Comdian Mail replica profile against Asterisk's actual Comedian Mail
>> >> > (which
>> >> > is written in C), and the Jester implementation outperformed it.
>> >> >
>> >> > I think you may be overestimating strain of loading Jester once per
>> >> > call.
>> >> > Not counting comments, the core module is less than 800 lines of code
>> >> > (hardly 'huge'), the other modules are all smaller than that, and
>> they
>> >> > can
>> >> > be loaded conditionally based upon what you want to accomplish. And
>> for
>> >> > those looking to squeeze more performance out, there's a supplied
>> script
>> >> > to
>> >> > pre-compile core and all modules, which means they wouldn't have to
>> be
>> >> > re-compiled every time they're loaded.
>> >> >
>> >> > I'm clear that there would be more efficient approaches than writing
>> a
>> >> > Lua
>> >> > toolkit, and, I doubt that most of them would be as easily
>> accessible as
>> >> > something written in Lua. Given that Lua is already blazing fast for
>> a
>> >> > scripting language, I think it's a fair compromise.
>> >> >
>> >> > I will add that I've considered rewriting the core functionality in C
>> >> > for a
>> >> > number of reasons, performance being one of them, but at this time
>> have
>> >> > neither the skill nor the time to learn the skill of writing C code
>> at
>> >> > that
>> >> > level. Someday, maybe... :)
>> >> >
>> >> > Chad
>> >> >
>> >> > On Sun, Jan 24, 2016 at 10:54 PM, Stanislav Sinyagin
>> >> > <ssinyagin at gmail.com>
>> >> > wrote:
>> >> >>
>> >> >> Yes, for relatively small scripts that are concentrated on their
>> jobs.
>> >> >> But
>> >> >> this thing is huge.
>> >> >>
>> >> >> On 25 Jan 2016 3:36 am, "Michael Jerris" <mike at jerris.com> wrote:
>> >> >>>
>> >> >>> Lua is likely to be by far the most efficient of any scripting
>> >> >>> language
>> >> >>> used in FreeSWITCH, if there is still really a concern about
>> >> >>> performance,
>> >> >>> more pieces can be moved to helpers built out in c code.  If you
>> are
>> >> >>> looking
>> >> >>> for dynamic but still optimal performance, lua is likely your best
>> bet
>> >> >>>
>> >> >>> On Sunday, January 24, 2016, Stanislav Sinyagin <
>> ssinyagin at gmail.com>
>> >> >>> wrote:
>> >> >>>>
>> >> >>>> why not re-implementing it in Golang and ESL?
>> >> >>>>
>> >> >>>> What's happening now with your system, is that FreeSWITCH loads
>> few
>> >> >>>> thousand lines of Lua code on every call establishment. So, even
>> with
>> >> >>>> default 30cps limit, you may overload the CPU with unnecessary
>> job.
>> >> >>>>
>> >> >>>> if you don't like Go, it could be some other language, but I like
>> the
>> >> >>>> built-in threads in it.
>> >> >>>>
>> >> >>>>
>> >> >>>>
>> >> >>>> On Sun, Jan 24, 2016 at 9:47 PM, Chad Phillips
>> >> >>>> <chad at apartmentlines.com>
>> >> >>>> wrote:
>> >> >>>> > Hi Bote,
>> >> >>>> >
>> >> >>>> > The difference is (supposed to be) that using Jester takes a
>> lot of
>> >> >>>> > the
>> >> >>>> > dirty work out of doing things that you must turn to scripting
>> for.
>> >> >>>> > The
>> >> >>>> > original design was to remove almost all scripting complexity,
>> and
>> >> >>>> > instead
>> >> >>>> > have users use a more template-based approach to writing their
>> >> >>>> > advanced
>> >> >>>> > workflows. You can have a look at
>> >> >>>> >
>> >> >>>> >
>> >> >>>> >
>> http://thehunmonkgroup.github.io/jester/doc/topics/03-Sequences.md.html#Writing_sequences
>> >> >>>> > to see the basic template style.
>> >> >>>> >
>> >> >>>> > And here's an example template that does some fairly advanced
>> >> >>>> > stuff:
>> >> >>>> >
>> >> >>>> >
>> >> >>>> >
>> >> >>>> >
>> http://thehunmonkgroup.github.io/jester/doc/examples/phone_to_post_test.lua.html
>> >> >>>> >
>> >> >>>> > To my eyes, what the template accomplishes is quite easy to
>> deduce
>> >> >>>> > from
>> >> >>>> > simply reading it, and all of the dirty work for taking those
>> >> >>>> > actions
>> >> >>>> > is
>> >> >>>> > handled by Jester core and the supporting modules.
>> >> >>>> >
>> >> >>>> > The current limitation is that you must use the template
>> structure
>> >> >>>> > to
>> >> >>>> > gain
>> >> >>>> > access to Jester's modules. Looking back, this was a design
>> mistake
>> >> >>>> > that I
>> >> >>>> > intend to rectify -- it would be much more powerful and
>> flexible to
>> >> >>>> > use a
>> >> >>>> > template when it made sense, and still be able to mix pure Lua
>> >> >>>> > scripting
>> >> >>>> > with calls to Jester's support modules when that makes more
>> sense.
>> >> >>>> > And
>> >> >>>> > what
>> >> >>>> > I'm hoping to get help with is correcting that design flaw while
>> >> >>>> > preserving
>> >> >>>> > 'the good stuff' in the toolkit.
>> >> >>>> >
>> >> >>>> > Chad
>> >> >>>> >
>> >> >>>> > On Fri, Jan 22, 2016 at 2:16 PM, Bote Man <
>> bote_radio at botecomm.com>
>> >> >>>> > wrote:
>> >> >>>> >>
>> >> >>>> >> Hey Chad, long time no chat J  I saw your update to the Help
>> >> >>>> >> section
>> >> >>>> >> of
>> >> >>>> >> the Confluence page concerning this and glanced at some things
>> >> >>>> >> there.
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >> I guess I don’t even know enough to understand the difference
>> >> >>>> >> between
>> >> >>>> >> using your toolkit and just plain writing a Lua script. Would
>> I,
>> >> >>>> >> for
>> >> >>>> >> example, write an abbreviated Lua script that calls tested and
>> >> >>>> >> proven
>> >> >>>> >> functions in your toolkit, sort of like a library?
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >> Anyway it sounds useful, so thanks.
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >> ---
>> >> >>>> >>
>> >> >>>> >> Bote
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >> FreeSWITCH Docs Janitor
>> >> >>>> >>
>> >> >>>> >> http://freeswitch.org/confluence
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >> From: Chad Phillips
>> >> >>>> >> Sent: Friday, 22 January, 2016 14:41
>> >> >>>> >> Subject: [Freeswitch-users] Seeking collaborators for
>> >> >>>> >> FreeSWITCH/Lua
>> >> >>>> >> scripting toolkit
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >> Looking for folks in the FreeSWITCH community who would be
>> >> >>>> >> interested
>> >> >>>> >> in
>> >> >>>> >> collaborating on an open source scripting toolkit I've written
>> for
>> >> >>>> >> FreeSWITCH/Lua. The basic idea is to have ready made solutions
>> to
>> >> >>>> >> common
>> >> >>>> >> scripting needs, so as not to reinvent the wheel.
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >> The original project was written in 2010. A lot of it still
>> works
>> >> >>>> >> great,
>> >> >>>> >> and there are some design flaws that I'd like to work out in
>> the
>> >> >>>> >> next
>> >> >>>> >> release.
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >> Project code is here:
>> https://github.com/thehunmonkgroup/jester
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >> Some background and reasoning for the project here:
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> http://xylil.com/2016/01/20/jester-freeswitch-lua-and-my-quest-for-an-awesome-scripting-toolkit/
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >> If anyone is interested in helping, please let me know!
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >> Chad
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >>
>> _________________________________________________________________________
>> >> >>>> >> Professional FreeSWITCH Consulting Services:
>> >> >>>> >> consulting at freeswitch.org
>> >> >>>> >> http://www.freeswitchsolutions.com
>> >> >>>> >>
>> >> >>>> >> Official FreeSWITCH Sites
>> >> >>>> >> http://www.freeswitch.org
>> >> >>>> >> http://confluence.freeswitch.org
>> >> >>>> >> http://www.cluecon.com
>> >> >>>> >>
>> >> >>>> >> FreeSWITCH-users mailing list
>> >> >>>> >> FreeSWITCH-users at lists.freeswitch.org
>> >> >>>> >> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>> >> >>>> >>
>> >> >>>> >>
>> >> >>>> >> UNSUBSCRIBE:
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>> >> >>>> >> http://www.freeswitch.org
>> >> >>>> >
>> >> >>>> >
>> >> >>>> >
>> >> >>>> >
>> >> >>>> >
>> >> >>>> >
>> _________________________________________________________________________
>> >> >>>> > Professional FreeSWITCH Consulting Services:
>> >> >>>> > consulting at freeswitch.org
>> >> >>>> > http://www.freeswitchsolutions.com
>> >> >>>> >
>> >> >>>> > Official FreeSWITCH Sites
>> >> >>>> > http://www.freeswitch.org
>> >> >>>> > http://confluence.freeswitch.org
>> >> >>>> > http://www.cluecon.com
>> >> >>>> >
>> >> >>>> > FreeSWITCH-users mailing list
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>> >> >>>> >
>> >> >>>> >
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>> >> >>>> > http://www.freeswitch.org
>> >> >>>>
>> >> >>>>
>> >> >>>>
>> >> >>>>
>> _________________________________________________________________________
>> >> >>>> Professional FreeSWITCH Consulting Services:
>> >> >>>> consulting at freeswitch.org
>> >> >>>> http://www.freeswitchsolutions.com
>> >> >>>>
>> >> >>>> Official FreeSWITCH Sites
>> >> >>>> http://www.freeswitch.org
>> >> >>>> http://confluence.freeswitch.org
>> >> >>>> http://www.cluecon.com
>> >> >>>>
>> >> >>>> FreeSWITCH-users mailing list
>> >> >>>> FreeSWITCH-users at lists.freeswitch.org
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>> >> >>>>
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>> >> >>>> http://www.freeswitch.org
>> >> >>>
>> >> >>>
>> >> >>>
>> >> >>>
>> _________________________________________________________________________
>> >> >>> Professional FreeSWITCH Consulting Services:
>> >> >>> consulting at freeswitch.org
>> >> >>> http://www.freeswitchsolutions.com
>> >> >>>
>> >> >>> Official FreeSWITCH Sites
>> >> >>> http://www.freeswitch.org
>> >> >>> http://confluence.freeswitch.org
>> >> >>> http://www.cluecon.com
>> >> >>>
>> >> >>> FreeSWITCH-users mailing list
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>> >> >>>
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>> >> >>
>> >> >>
>> >> >>
>> >> >>
>> _________________________________________________________________________
>> >> >> Professional FreeSWITCH Consulting Services:
>> >> >> consulting at freeswitch.org
>> >> >> http://www.freeswitchsolutions.com
>> >> >>
>> >> >> Official FreeSWITCH Sites
>> >> >> http://www.freeswitch.org
>> >> >> http://confluence.freeswitch.org
>> >> >> http://www.cluecon.com
>> >> >>
>> >> >> FreeSWITCH-users mailing list
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>> >> >>
>> >> >> UNSUBSCRIBE:
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>> >> >> http://www.freeswitch.org
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> _________________________________________________________________________
>> >> > Professional FreeSWITCH Consulting Services:
>> >> > consulting at freeswitch.org
>> >> > http://www.freeswitchsolutions.com
>> >> >
>> >> > Official FreeSWITCH Sites
>> >> > http://www.freeswitch.org
>> >> > http://confluence.freeswitch.org
>> >> > http://www.cluecon.com
>> >> >
>> >> > FreeSWITCH-users mailing list
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>> >> > UNSUBSCRIBE:
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>> >>
>> >>
>> _________________________________________________________________________
>> >> Professional FreeSWITCH Consulting Services:
>> >> consulting at freeswitch.org
>> >> http://www.freeswitchsolutions.com
>> >>
>> >> Official FreeSWITCH Sites
>> >> http://www.freeswitch.org
>> >> http://confluence.freeswitch.org
>> >> http://www.cluecon.com
>> >>
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>> >
>> >
>> >
>> >
>> _________________________________________________________________________
>> > Professional FreeSWITCH Consulting Services:
>> > consulting at freeswitch.org
>> > http://www.freeswitchsolutions.com
>> >
>> > Official FreeSWITCH Sites
>> > http://www.freeswitch.org
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>> > http://www.cluecon.com
>> >
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>>
>> _________________________________________________________________________
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>> http://www.freeswitchsolutions.com
>>
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>>
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>
>
>
> --
> Anthony Minessale II       ♬ @anthmfs  ♬ @FreeSWITCH  ♬
>
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>
> _________________________________________________________________________
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>
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>
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-- 

Arthur
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