DJ: Delayed Job Noob Question

Rails
1

Hi guys: just got into Rails about a month ago and an about to launch
something.

I use Heroku and they limit the execution time of pages to 30 seconds. i
have a process which takes a lot longer than that. So i’m trying to do a
delayed job.

The docs on delayed job must be for the pros out there cause I can’t
seem to find out the answers to a few simple questions…

  • where do i put the file with the job in it
  • what do i name it
  • how do i call it
  • how do I put it in the queue
  • can I run it say, every 5 minutes?

Anyways, hope someone out there can help me out…

Thanks…Chris

2

Chris K. wrote:

Hi guys: just got into Rails about a month ago and an about to launch
something.

I use Heroku and they limit the execution time of pages to 30 seconds. i
have a process which takes a lot longer than that. So i’m trying to do a
delayed job.

The docs on delayed job must be for the pros out there cause I can’t
seem to find out the answers to a few simple questions…

  • where do i put the file with the job in it
  • what do i name it
  • how do i call it
  • how do I put it in the queue
  • can I run it say, every 5 minutes?

Anyways, hope someone out there can help me out…

Thanks…Chris

This railscast should answer your first few questions -

I’m using DJ on Heroku and I’m running jobs in a recurring fashion. I
kick things off from the console. I just call some methods that I wrote
that do nothing but enqueue some jobs. I have the recurring jobs
re-enqueue themselves upon completion. Here’s an example:

def enqueue_media_cleanup
#this is what I run from the Heroku console
Delayed::Job.enqueue ClearOldEventsJob.new(), 0, 15.minutes.from_now
Delayed::Job.enqueue DumpOldMediaJob.new(), 0, 2.minutes.from_now
end

def purge_expired_events

#some code to do some stuff…

#ClearOldEventsJob just runs/calls purge_expired_events
Delayed::Job.enqueue ClearOldEventsJob.new(), 0, 6.hours.from_now

end

There are other ways to do it but this has been working well for me.