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Class: ActiveJob::Base

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
ActionMailer::MailDeliveryJob, ActiveRecord::DestroyAssociationAsyncJob
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::ActiveSupport::DescendantsTracker
Instance Chain:
self, Exceptions, Callbacks, ::ActiveSupport::Callbacks, Execution, ::ActiveSupport::Rescuable, Enqueuing, QueuePriority, QueueName, Core
Inherits: Object
Defined in: activejob/lib/active_job/base.rb

Overview

Active Job objects can be configured to work with different backend queuing frameworks. To specify a queue adapter to use:

ActiveJob::Base.queue_adapter = :inline

A list of supported adapters can be found in QueueAdapters.

Active Job objects can be defined by creating a class that inherits from the Base class. The only necessary method to implement is the “perform” method.

To define an Active Job object:

class ProcessPhotoJob < ActiveJob::Base
  def perform(photo)
    photo.watermark!('Rails')
    photo.rotate!(90.degrees)
    photo.resize_to_fit!(300, 300)
    photo.upload!
  end
end

Records that are passed in are serialized/deserialized using Global ID. More information can be found in Arguments.

To enqueue a job to be performed as soon as the queuing system is free:

ProcessPhotoJob.perform_later(photo)

To enqueue a job to be processed at some point in the future:

ProcessPhotoJob.set(wait_until: Date.tomorrow.noon).perform_later(photo)

More information can be found in Core::ClassMethods#set

A job can also be processed immediately without sending to the queue:

ProcessPhotoJob.perform_now(photo)

Exceptions

Constant Summary

::ActiveSupport::Callbacks - Included

CALLBACK_FILTER_TYPES

Exceptions - Included

JITTER_DEFAULT

Exceptions - Attributes & Methods

Logging - Attributes & Methods

QueueAdapter - Attributes & Methods

QueueName - Attributes & Methods

QueuePriority - Attributes & Methods

Class Method Summary

::ActiveSupport::DescendantsTracker - self

descendants

See additional method definition at line 104.
subclasses

See additional method definition at line 100.

Instance Attribute Summary

Callbacks - Included

#__callbacks, #__callbacks?

Execution - Included

#rescue_handlers, #rescue_handlers?

Core - Included

#arguments

Job arguments.
#enqueue_error

Track any exceptions raised by the backend so callers can inspect the errors.
#enqueued_at

Track when a job was enqueued.
#exception_executions

::Hash that contains the number of times this job handled errors for each specific retry_on declaration.
#executions

Number of times this job has been executed (which increments on every retry, like after an exception).
#job_id

Job Identifier.
#locale

I18n.locale to be used during the job.
#priority=

Priority that the job will have (lower is more priority).
#provider_job_id

ID optionally provided by adapter.
#queue_name=

Queue in which the job will reside.
#scheduled_at

::Time when the job should be performed.
#scheduled_at=, #serialized_arguments=, #successfully_enqueued?,
#timezone

Timezone to be used during the job.

Instance Method Summary

Exceptions - Included

#retry_job

Reschedules the job to be re-executed.

::ActiveSupport::Callbacks - Included

#run_callbacks

Runs the callbacks for the given event.

Execution - Included

#perform,
#perform_now

Performs the job immediately.

::ActiveSupport::Rescuable - Included

#rescue_with_handler

Delegates to the class method, but uses the instance as the subject for rescue_from handlers (method calls, instance_exec blocks).

Enqueuing - Included

#enqueue

Enqueues the job to be performed by the queue adapter.

QueuePriority - Included

#priority

Returns the priority that the job will be created with.

QueueName - Included

#queue_name

Returns the name of the queue the job will be run on.

Core - Included

#deserialize

Attaches the stored job data to the current instance.
#initialize

Creates a new job instance.
#serialize

Returns a hash with the job data that can safely be passed to the queuing adapter.

Class Attribute Details

._queue_adapter (rw)

[ GitHub ] 

  


# File 'activejob/lib/active_job/queue_adapter.rb', line 24



class_attribute :_queue_adapter, instance_accessor: false, instance_predicate: false


  








  

    ._queue_adapter_name   (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/queue_adapter.rb', line 23



class_attribute :_queue_adapter_name, instance_accessor: false, instance_predicate: false


  








  

    .after_discard_procs   (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/exceptions.rb', line 12



class_attribute :after_discard_procs, default: []


  








  

    .after_discard_procs?  ⇒ Boolean  (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/exceptions.rb', line 12



class_attribute :after_discard_procs, default: []


  








  

    .log_arguments   (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/logging.rb', line 12



class_attribute :log_arguments, instance_accessor: false, default: true


  








  

    .log_arguments?  ⇒ Boolean  (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/logging.rb', line 12



class_attribute :log_arguments, instance_accessor: false, default: true


  








  

    .logger   (rw)
    Also known as: #logger
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/logging.rb', line 11



cattr_accessor :logger, default: ActiveSupport::TaggedLogging.new(ActiveSupport::Logger.new(STDOUT))


  








  

    .priority   (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/queue_priority.rb', line 49



class_attribute :priority, instance_accessor: false, default: default_priority


  








  

    .priority?  ⇒ Boolean  (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/queue_priority.rb', line 49



class_attribute :priority, instance_accessor: false, default: default_priority


  








  

    .queue_name   (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/queue_name.rb', line 55



class_attribute :queue_name, instance_accessor: false, default: -> { self.class.default_queue_name }


  








  

    .queue_name?  ⇒ Boolean  (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/queue_name.rb', line 55



class_attribute :queue_name, instance_accessor: false, default: -> { self.class.default_queue_name }


  








  

    .queue_name_delimiter   (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/queue_name.rb', line 56



class_attribute :queue_name_delimiter, instance_accessor: false, default: "_"


  








  

    .queue_name_delimiter?  ⇒ Boolean  (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/queue_name.rb', line 56



class_attribute :queue_name_delimiter, instance_accessor: false, default: "_"


  








  

    .queue_name_prefix   (rw)
  

  [ GitHub ]


  

  


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



class_attribute :queue_name_prefix


  








  

    .queue_name_prefix?  ⇒ Boolean  (rw)
  

  [ GitHub ]


  

  


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



class_attribute :queue_name_prefix


  








  

    .retry_jitter   (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/exceptions.rb', line 11



class_attribute :retry_jitter, instance_accessor: false, instance_predicate: false, default: 0.0


  







Instance Attribute Details



  

    #after_discard_procs   (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/exceptions.rb', line 12



class_attribute :after_discard_procs, default: []


  








  

    #after_discard_procs?  ⇒ Boolean  (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/exceptions.rb', line 12



class_attribute :after_discard_procs, default: []


  








  

    #logger   (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/logging.rb', line 11



cattr_accessor :logger, default: ActiveSupport::TaggedLogging.new(ActiveSupport::Logger.new(STDOUT))


  








  

    #queue_adapter   (readonly)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/queue_adapter.rb', line 26



delegate :queue_adapter, to: :class


  








  

    #queue_name_prefix   (rw)
  

  [ GitHub ]


  

  


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



class_attribute :queue_name_prefix


  








  

    #queue_name_prefix?  ⇒ Boolean  (rw)
  

  [ GitHub ]


  

  


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



class_attribute :queue_name_prefix