module ActiveJob::Core

Active Job Core¶ ↑

Provides general behavior that will be included into every Active Job object that inherits from ActiveJob::Base.

Attributes

arguments [RW]

Job arguments

enqueue_error [RW]

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

enqueued_at [RW]

Track when a job was enqueued

exception_executions [RW]

Hash that contains the number of times this job handled errors for each specific retry_on declaration. Keys are the string representation of the exceptions listed in the retry_on declaration, while its associated value holds the number of executions where the corresponding retry_on declaration handled one of its listed exceptions.

executions [RW]

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

job_id [RW]

Job Identifier

locale [RW]

I18n.locale to be used during the job.

priority [W]

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

provider_job_id [RW]

ID optionally provided by adapter

queue_name [W]

Queue in which the job will reside.

scheduled_at [RW]

Time when the job should be performed

serialized_arguments [W]

timezone [RW]

Timezone to be used during the job.

Public Class Methods

new (*arguments)

Creates a new job instance. Takes the arguments that will be passed to the perform method.

# File activejob/lib/active_job/core.rb, line 93
def initialize(*arguments)
  @arguments  = arguments
  @job_id     = SecureRandom.uuid
  @queue_name = self.class.queue_name
  @scheduled_at = nil
  @priority   = self.class.priority
  @executions = 0
  @exception_executions = {}
  @timezone   = Time.zone&.name
end

Public Instance Methods

deserialize (job_data)

Attaches the stored job data to the current instance. Receives a hash returned from serialize

Examples¶ ↑

class DeliverWebhookJob < ActiveJob::Base
  attr_writer :attempt_number

  def attempt_number
    @attempt_number ||= 0
  end

  def serialize
    super.merge('attempt_number' => attempt_number + 1)
  end

  def deserialize(job_data)
    super
    self.attempt_number = job_data['attempt_number']
  end

  rescue_from(Timeout::Error) do |exception|
    raise exception if attempt_number > 5
    retry_job(wait: 10)
  end
end

# File activejob/lib/active_job/core.rb, line 150
def deserialize(job_data)
  self.job_id               = job_data["job_id"]
  self.provider_job_id      = job_data["provider_job_id"]
  self.queue_name           = job_data["queue_name"]
  self.priority             = job_data["priority"]
  self.serialized_arguments = job_data["arguments"]
  self.executions           = job_data["executions"]
  self.exception_executions = job_data["exception_executions"]
  self.locale               = job_data["locale"] || I18n.locale.to_s
  self.timezone             = job_data["timezone"] || Time.zone&.name
  self.enqueued_at          = Time.iso8601(job_data["enqueued_at"]) if job_data["enqueued_at"]
  self.scheduled_at         = Time.iso8601(job_data["scheduled_at"]) if job_data["scheduled_at"]
end

serialize ()

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

# File activejob/lib/active_job/core.rb, line 107
def serialize
  {
    "job_class"  => self.class.name,
    "job_id"     => job_id,
    "provider_job_id" => provider_job_id,
    "queue_name" => queue_name,
    "priority"   => priority,
    "arguments"  => serialize_arguments_if_needed(arguments),
    "executions" => executions,
    "exception_executions" => exception_executions,
    "locale"     => I18n.locale.to_s,
    "timezone"   => timezone,
    "enqueued_at" => Time.now.utc.iso8601(9),
    "scheduled_at" => scheduled_at ? scheduled_at.utc.iso8601(9) : nil,
  }
end

successfully_enqueued? ()

# File activejob/lib/active_job/core.rb, line 51
def successfully_enqueued?
  @successfully_enqueued
end