123456789_123456789_123456789_123456789_123456789_

Class: ActiveJob::Base

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
ActionMailer::DeliveryJob, ActionMailer::Parameterized::DeliveryJob
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 queueing 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

Core - Attributes & Methods

Logging - Attributes & Methods

QueueAdapter - Attributes & Methods

QueueName - Attributes & Methods

QueuePriority - Attributes & Methods

Class Method Summary

::ActiveSupport::DescendantsTracker - self

clear, descendants, direct_descendants,
store_inherited

This is the only method that is not thread safe, but is only ever called during the eager loading phase.

Instance Attribute Summary

Callbacks - Included

#__callbacks, #__callbacks?

Execution - Included

#rescue_handlers, #rescue_handlers?

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 queueing adapter.

Class Attribute Details

._queue_adapter (rw)

[ GitHub ] 

  


# File 'activejob/lib/active_job/queue_adapter.rb', line 13



class_attribute :_queue_adapter, instance_accessor: false, instance_predicate: false


  








  

    ._queue_adapter_name   (rw)
  

  [ GitHub ]


  

  


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



class_attribute :_queue_adapter_name, instance_accessor: false, instance_predicate: false


  








  

    .logger   (rw)
    Also known as: #logger
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/logging.rb', line 13



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


  








  

    .priority   (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/queue_priority.rb', line 32



class_attribute :priority, instance_accessor: false, default: default_priority


  








  

    .priority?  ⇒ Boolean  (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/queue_priority.rb', line 32



class_attribute :priority, instance_accessor: false, default: default_priority


  








  

    .queue_name   (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/queue_name.rb', line 37



class_attribute :queue_name, instance_accessor: false, default: default_queue_name


  








  

    .queue_name?  ⇒ Boolean  (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/queue_name.rb', line 37



class_attribute :queue_name, instance_accessor: false, default: default_queue_name


  








  

    .queue_name_delimiter   (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/queue_name.rb', line 38



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


  








  

    .queue_name_delimiter?  ⇒ Boolean  (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/queue_name.rb', line 38



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


  







Instance Attribute Details



  

    #arguments   (rw)
  



  

    

Job arguments


  



  [ GitHub ]


  

  


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



attr_accessor :arguments


  








  

    #executions   (rw)
  



  

    

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


  



  [ GitHub ]


  

  


# File 'activejob/lib/active_job/core.rb', line 30



attr_accessor :executions


  








  

    #job_id   (rw)
  



  

    

Job Identifier


  



  [ GitHub ]


  

  


# File 'activejob/lib/active_job/core.rb', line 18



attr_accessor :job_id


  








  

    #locale   (rw)
  



  

    

I18n.locale to be used during the job.


  



  [ GitHub ]


  

  


# File 'activejob/lib/active_job/core.rb', line 33



attr_accessor :locale


  








  

    #logger   (rw)
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/logging.rb', line 13



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


  








  

    #priority=(value)   (writeonly)
  



  

    

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


  



  [ GitHub ]


  

  


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



attr_writer :priority


  








  

    #provider_job_id   (rw)
  



  

    

ID optionally provided by adapter


  



  [ GitHub ]


  

  


# File 'activejob/lib/active_job/core.rb', line 27



attr_accessor :provider_job_id


  








  

    #queue_name=(value)   (writeonly)
  



  

    

Queue in which the job will reside.


  



  [ GitHub ]


  

  


# File 'activejob/lib/active_job/core.rb', line 21



attr_writer :queue_name


  








  

    #scheduled_at   (rw)
  



  

    

Timestamp when the job should be performed


  



  [ GitHub ]


  

  


# File 'activejob/lib/active_job/core.rb', line 15



attr_accessor :scheduled_at


  








  

    #serialized_arguments=(value)   (writeonly)
  

  [ GitHub ]


  

  


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



attr_writer :serialized_arguments