Implement a Wait-for-Job Mechanism

[mojolicious]

Implement a Wait-for-Job Mechanism

[kraih]

It's not actually the tests that need to be changed, but how we currently handle testing with $minion->perform_jobs.

[stephan48]

Thanks sri! The discussion can also be found in our IRC Log! http://irclog.perlgeek.de/mojo/2016-02-21#i_12078379

[JamesDooley]

I agree this would be a very useful feature. It would allow us to easily queue sub tasks for very complex jobs. For my use case I can check every few seconds, but it would be a lot better to have Minion respond back, within a reasonable time, when a job is completed.

[kraih]

@JamesDooley We already have job dependencies for that.

[JamesDooley]

Correct me if I am wrong, but dependencies only allow you to start new jobs inside a parent and exit. The parent job will not be waiting for the child jobs to complete, which is where the notifications could come in to play. I would like to wait for a set of child tasks to complete, before moving on to the next step in the parent job.

Although, looking at the test code in that commit, it looks like I could approach this differently and schedule all of the tasks from the parent and finish the job. Set the dependencies on the tasks that need to happen later, and they will not be run until their parents have completed.

[kraih]

I don't think we will do this, now that Mojolicious has native support for subprocesses, there shouldn't be too many use cases left. http://mojolicious.org/perldoc/Mojo/IOLoop#subprocess