Active Job – Make work happen later
Active Job is a framework for declaring jobs and making them run on a variety of queuing backends. These jobs can be everything from regularly scheduled clean-ups, to billing charges, to mailings — anything that can be chopped up into small units of work and run in parallel.
It also serves as the backend for Action Mailer’s deliver_later functionality that makes it easy to turn any mailing into a job for running later. That’s one of the most common jobs in a modern web application: sending emails outside the request-response cycle, so the user doesn’t have to wait on it.
The main point is to ensure that all
Rails apps will have a job infrastructure in place, even if it’s in the form of an “immediate runner”. We can then have framework features and other gems build on top of that, without having to worry about API differences between Delayed Job and Resque. Picking your queuing backend becomes more of an operational concern, then. And you’ll be able to switch between them without having to rewrite your jobs.
You can read more about Active Job in the Active Job Basics guide.
To learn how to use your preferred queuing backend see its adapter documentation at ActiveJob::QueueAdapters.
Declare a job like so:
class MyJob < ActiveJob::Base queue_as :my_jobs def perform(record) record.do_work end end
Enqueue a job like so:
MyJob.perform_later record # Enqueue a job to be performed as soon as the queuing system is free.
MyJob.set(wait_until: Date.tomorrow.noon).perform_later(record) # Enqueue a job to be performed tomorrow at noon.
MyJob.set(wait: 1.week).perform_later(record) # Enqueue a job to be performed 1 week from now.
Active Job supports GlobalID serialization for parameters. This makes it possible to pass live Active Record objects to your job instead of class/id pairs, which you then have to manually deserialize. Before, jobs would look like this:
class TrashableCleanupJob def perform(trashable_class, trashable_id, depth) trashable = trashable_class.constantize.find(trashable_id) trashable.cleanup(depth) end end
Now you can simply do:
class TrashableCleanupJob def perform(trashable, depth) trashable.cleanup(depth) end end
This works with any class that mixes in GlobalID::Identification, which by default has been mixed into Active Record classes.
Supported queuing systems
Active Job has built-in adapters for multiple queuing backends (Sidekiq, Resque, Delayed Job and others). To get an up-to-date list of the adapters see the API Documentation for ActiveJob::QueueAdapters.
Please note: We are not accepting pull requests for new adapters. We encourage library authors to provide an
ActiveJob adapter as part of their gem, or as a stand-alone gem. For discussion about this see the following PRs: 23311, 21406, and #32285.
Download and installation
The latest version of Active Job can be installed with RubyGems:
$ gem install activejob
Source code can be downloaded as part of the
Rails project on GitHub:
Active Job is released under the MIT license:
API documentation is at:
Bug reports for the Ruby on
Rails project can be filed here:
Feature requests should be discussed on the rails-core mailing list here: