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Class: ActiveJob::QueueAdapters::QueueClassicAdapter

Relationships & Source Files
Namespace Children
Classes:
JobWrapper
Inherits: Object
Defined in: activejob/lib/active_job/queue_adapters/queue_classic_adapter.rb

Overview

queue_classic adapter for Active Job

queue_classic provides a simple interface to a PostgreSQL-backed message queue. queue_classic specializes in concurrent locking and minimizing database load while providing a simple, intuitive developer experience. queue_classic assumes that you are already using PostgreSQL in your production environment and that adding another dependency (e.g. redis, beanstalkd, 0mq) is undesirable.

Read more about queue_classic here.

To use queue_classic set the queue_adapter config to :queue_classic.

Rails.application.config.active_job.queue_adapter = :queue_classic

Instance Method Summary

Instance Method Details

#build_queue(queue_name)

Builds a QC::Queue object to schedule jobs on.

If you have a custom QC::Queue subclass you’ll need to subclass QueueClassicAdapter and override the build_queue method.

[ GitHub ] 

  


# File 'activejob/lib/active_job/queue_adapters/queue_classic_adapter.rb', line 45



def build_queue(queue_name)
  QC::Queue.new(queue_name)
end


  








  

    #enqueue(job)  
  

  

    This method is for internal use only.
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/queue_adapters/queue_classic_adapter.rb', line 22



def enqueue(job) # :nodoc:
  qc_job = build_queue(job.queue_name).enqueue("#{JobWrapper.name}.perform", job.serialize)
  job.provider_job_id = qc_job["id"] if qc_job.is_a?(Hash)
  qc_job
end


  








  

    #enqueue_at(job, timestamp)  
  

  

    This method is for internal use only.
  

  [ GitHub ]


  

  


# File 'activejob/lib/active_job/queue_adapters/queue_classic_adapter.rb', line 28



def enqueue_at(job, timestamp) # :nodoc:
  queue = build_queue(job.queue_name)
  unless queue.respond_to?(:enqueue_at)
    raise NotImplementedError, "To be able to schedule jobs with queue_classic " \
      "the QC::Queue needs to respond to `enqueue_at(timestamp, method, *args)`. " \
      "You can implement this yourself or you can use the queue_classic-later gem."
  end
  qc_job = queue.enqueue_at(timestamp, "#{JobWrapper.name}.perform", job.serialize)
  job.provider_job_id = qc_job["id"] if qc_job.is_a?(Hash)
  qc_job
end