Module: ActiveJob::Callbacks::ClassMethods

Defined in:
activejob/lib/active_job/callbacks.rb

Overview

These methods will be included into any Active Job object, adding callbacks for perform and enqueue methods.

Instance Method Summary collapse

Instance Method Details

#after_enqueue(*filters, &blk) ⇒ Object

Defines a callback that will get called right after the job is enqueued.

class VideoProcessJob < ActiveJob::Base
  queue_as :default

  after_enqueue do |job|
    $statsd.increment "enqueue-video-job.success"
  end

  def perform(video_id)
    Video.find(video_id).process
  end
end

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# File 'activejob/lib/active_job/callbacks.rb', line 147

def after_enqueue(*filters, &blk)
  set_callback(:enqueue, :after, *filters, &blk)
end

#after_perform(*filters, &blk) ⇒ Object

Defines a callback that will get called right after the job's perform method has finished.

class VideoProcessJob < ActiveJob::Base
  queue_as :default

  after_perform do |job|
    UserMailer.notify_video_processed(job.arguments.first)
  end

  def perform(video_id)
    Video.find(video_id).process
  end
end

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# File 'activejob/lib/active_job/callbacks.rb', line 76

def after_perform(*filters, &blk)
  set_callback(:perform, :after, *filters, &blk)
end

#around_enqueue(*filters, &blk) ⇒ Object

Defines a callback that will get called around the enqueuing of the job.

class VideoProcessJob < ActiveJob::Base
  queue_as :default

  around_enqueue do |job, block|
    $statsd.time "video-job.process" do
      block.call
    end
  end

  def perform(video_id)
    Video.find(video_id).process
  end
end

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# File 'activejob/lib/active_job/callbacks.rb', line 168

def around_enqueue(*filters, &blk)
  set_callback(:enqueue, :around, *filters, &blk)
end

#around_perform(*filters, &blk) ⇒ Object

Defines a callback that will get called around the job's perform method.

class VideoProcessJob < ActiveJob::Base
  queue_as :default

  around_perform do |job, block|
    UserMailer.notify_video_started_processing(job.arguments.first)
    block.call
    UserMailer.notify_video_processed(job.arguments.first)
  end

  def perform(video_id)
    Video.find(video_id).process
  end
end

You can access the return value of the job only if the execution wasn't halted.

class VideoProcessJob < ActiveJob::Base
  around_perform do |job, block|
    value = block.call
    puts value # => "Hello World!"
  end

  def perform
    "Hello World!"
  end
end

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# File 'activejob/lib/active_job/callbacks.rb', line 109

def around_perform(*filters, &blk)
  set_callback(:perform, :around, *filters, &blk)
end

#before_enqueue(*filters, &blk) ⇒ Object

Defines a callback that will get called right before the job is enqueued.

class VideoProcessJob < ActiveJob::Base
  queue_as :default

  before_enqueue do |job|
    $statsd.increment "enqueue-video-job.try"
  end

  def perform(video_id)
    Video.find(video_id).process
  end
end

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# File 'activejob/lib/active_job/callbacks.rb', line 128

def before_enqueue(*filters, &blk)
  set_callback(:enqueue, :before, *filters, &blk)
end

#before_perform(*filters, &blk) ⇒ Object

Defines a callback that will get called right before the job's perform method is executed.

class VideoProcessJob < ActiveJob::Base
  queue_as :default

  before_perform do |job|
    UserMailer.notify_video_started_processing(job.arguments.first)
  end

  def perform(video_id)
    Video.find(video_id).process
  end
end

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# File 'activejob/lib/active_job/callbacks.rb', line 57

def before_perform(*filters, &blk)
  set_callback(:perform, :before, *filters, &blk)
end