class ActiveJob::QueueAdapters::QueueClassicAdapter

Rails.application.config.active_job.queue_adapter = :queue_classic
To use Queue Classic set the queue_adapter config to :queue_classic.
Read more about Queue Classic here.
beanstalkd, 0mq) is undesirable.
production environment and that adding another dependency (e.g. redis,
queue_classic assumes that you are already using PostgreSQL in your
database load while providing a simple, intuitive developer experience.
queue. queue_classic specializes in concurrent locking and minimizing
queue_classic provides a simple interface to a PostgreSQL-backed message
== Queue Classic adapter for Active Job

def build_queue(queue_name)

build_queue method.
ActiveJob::QueueAdapters::QueueClassicAdapter and override the
If you have a custom QC::Queue subclass you'll need to suclass

Builds a QC::Queue object to schedule jobs on. 
def build_queue(queue_name)
  QC::Queue.new(queue_name)
end

def enqueue(job) #:nodoc:

:nodoc: 
def enqueue(job) #:nodoc:
  build_queue(job.queue_name).enqueue("#{JobWrapper.name}.perform", job.serialize)
end

def enqueue_at(job, timestamp) #:nodoc:

:nodoc: 
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
  queue.enqueue_at(timestamp, "#{JobWrapper.name}.perform", job.serialize)
end