gistfile1.rb

# app/models/queue/high.rb
class Queue::High
  @queue = :high
  
  def self.enqueue(object, method, *args)
    # ...to be continued
  end

  def self.perform
    # ...to be continued
  end
end

# app/models/queue/normal.rb
class Queue::Normal
  @queue = :normal
  
  def self.enqueue(object, method, *args)
    # ...to be continued
  end

  def self.perform
    # ...to be continued
  end
end

# app/models/queue/low.rb
class Queue::Low
  @queue = :low
  
  def self.enqueue(object, method, *args)
    # ...to be continued
  end

  def self.perform
    # ...to be continued
  end
end