A Ruby On Rails framework for declaring jobs and performing or enqueuing them.
Active Job is a framework for declaring jobs and making them run on a variety of queueing back-ends. 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, really.
Active Job is part of Ruby On Rails: https://github.com/rails/rails/tree/master/activejob/ and extends Action Mailer by adding deliver_later
method.
The default queue adapter is inline, which does not support enqueuing.