[asterisk-app-dev] Question on implementation of "assigned" uniqueid when creating channels.

[Matthew Jordan]

On Fri, Feb 21, 2014 at 12:04 PM, Richard Mudgett <rmudgett at digium.com> wrote:
>
>
>
> On Fri, Feb 21, 2014 at 10:56 AM, Scott Griepentrog
> <sgriepentrog at digium.com> wrote:
>>
>> Hi all-
>>
>> I'm working on the ability to set the uniqueid on channel creation via ami
>> and ari, and I've run into a quandary:
>>
>> When Asterisk dials over chan_local, it creates a LOCAL/something;1
>> channel, and another LOCAL/something;2 channel to handle the other end of
>> the call.  If I'm specifying the uniqueid when I originate the call, I would
>> presume it would be set to the ;1 channel, as that's the one I'm actually
>> talking to.  But should there be something identifiable (rather than the
>> standard 012345678.123 uniqueid format) on the ;2 channel?  For example, if
>> I create the ;1 channel as 'MyCustomId', would it be useful to have the
>> uniqueid of the ;2 channel be 'MyCustomId;2' ?
>>
>> Although it's probably not a good idea, it's not technically impossible to
>> set the same 'MyCustomId' to both channels.  Any other ideas on how best to
>> handle this?
>
>
> It is definitely not a good idea to have both the ;1 and ;2 channels to have
> the same uniqueid.
> They are different channels and if you look up a channel by uniqueid you
> won't know which
> local channel you will get.
>
> Pretty much the choices you have are:
> 1) Give ;1 the requested id and let the ;2 generate its own id.
>
> 2) Give ;1 the requested id and give the ;2 the same id with an appended ;2
> or some other differentiator that lets the two channels be associated by a
> similar id.
>
> 3) Give ;1 the requested id and give the ;2 an extra given id by the
> requester.  This option has the drawback of requiring the user to pass two
> ids when creating a local channel.
>

I'd be very interested to hear more opinions on this one - but my
inclination is either option (2) or option (3).

Matt

-- 
Matthew Jordan
Digium, Inc. | Engineering Manager
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at: http://digium.com & http://asterisk.org