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Hello Christian,

Sure, no problem I can give you a status update on the situation as of now!

The effort is mostly now to get/find a supported third-party Python library that does not
use asyncio for usage in a oslo.messaging driver.

The investigation into introducing asyncio support in the ecosystem (oslo and then all
separate projects) was a too massive effort.

Since then I’ve opened an issue [1] on the nats.py GitHub and some proof-of-concept 
patches [2] on introducing synchronous support in nats.py that we could then use in a driver.

The oslo.messaging driver patch [3] has Devstack passing when using [2] but it’s also
more of a proof-of-concept patch that would need more work in itself.

Unfortunately I didn’t get any feedback from the company maintaining the nats.py library
on supported developer time implemeting the sync client feature, I assume (my view) that
they didn’t like that we cannot guarantee that NATS would become a core component (or used, or the primary bus)
in the ecosystem (since we don’t, and don’t want to for that matter, force a backend/driver on operators).

Any help is of course appreciated, right now this is not a top priority and I don’t spend any full-time
effort into it.

Best regards
Tobias

[1] https://github.com/nats-io/nats.py/issues/462
[2] https://github.com/tobias-urdin/nats.py/commits/sync-client
[3] https://review.opendev.org/c/openstack/oslo.messaging/+/878588

> On 14 Jul 2023, at 09:37, Christian Rohmann <christian.rohmann at inovex.de> wrote:
> 
> On 12/09/2022 09:05, Tobias Urdin wrote:
>> Hello,
>> 
>> Since I haven’t heard any objections we’ll move the meeting to the Oslo
>> meeting on the 19th of September. See you there! [1]
>> 
>> [1] https://wiki.openstack.org/wiki/Meetings/Oslo
>> 
> Could you maybe give an update on the current state on adding NATS to oslo.messaging?
> 
> I know there was some positive exchange during an Oslo Meeting [1], but now all but the spec change
>  [2] are abandoned? Is the work on the spec [3] still going then?
> 
> 
> Regards
> 
> Christian
> 
> 
> [1] https://meetings.opendev.org/meetings/oslo/2022/oslo.2022-09-19-15.12.log.txt
> [2] https://review.opendev.org/q/topic:asyncio-nats
> [3] https://review.opendev.org/c/openstack/oslo-specs/+/692784
>