[HireFire] Extract a "working" worker's job's queue name about qu

[bkeepers]

HireFire is basically an autoscaler for web and worker dynos on Heroku.

Yeah, I love HireFire. I've been wanting to make it work with speakerdeck.com.

The scenario is as follows; When you pop a job from the queue in for example Redis, and immediately call Qu.backend.length, will it return 0 or 1?

0.

And if it returns 0 could that mean the worker is still actually processing the job or has the worker definitely finished processing the job?

It could still be processing the job.

Also, does this result differ from the Mongo backend?

Nope, all qu backends should operate identically.

Resque provides a method to return all the workers that are currently "working", and they contain the job object and their data (such as the name of the queue the job was pushed in to).

Workers are busy if they have the working_on attribute set.

total_workers_working = Qu.backend.workers.select { |w| w.working_on }.size

Unfortunately, it doesn't store the job data, so you don't know which queue those workers are working on. I don't have a good reason why, so I would be in favor of having Worker#working_on return all the meta-data about a job.

[jnunemaker]

Is this still valid? Let me know if there is still work to do or if we can close this.

[mrrooijen]

It's been resolved. I'll close it. :)