Add queues priority to metrics only works in redis

[ahelmy]

#196
@danihodovic

[danihodovic]

Could we add a test for this?

[ahelmy]

It would be hard for the moment, I need to understand how test working in this repo.
But I tested locally and works perfect with redis.

[danihodovic]

We will need a test to prevent future changes from breaking this logic. I can give you some help with the test, but the earliest would be later this month. We use Redis, but not queue priorities so it's not a pressing matter for us.

[ahelmy]

appreciating your guidance, priority queue could be applied to Redis as well and its used normally so important to support that

[ahelmy]

@danihodovic Please find unit testing, late better than nothing :D

[danihodovic]

Hi @ahelmy,

Sorry about the long time until review. I've been busy with other projects.

I think adding queue priority is a seldom used feature (especially with Redis) and it complicates the celery-exporter code. At the moment I prefer not to merge it as I'm not using it in any of my projects and this is the first feature request I get.

If you would like to support it please fork the project.

Thank you,
Dani