Usage of CBA, DelayedJob

user.rb

# Referenced in: http://cba.iboard.cc/p/readme

class User
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Paperclip
.....
  # Notifications
  after_create   :async_notify_on_creation
  before_destroy :async_notify_on_cancellation
  before_update  :notify_if_confirmed
.....

  private  

  # Inform admin about sign ups and cancellations of accounts
  def async_notify_on_creation
     DelayedJob.enqueue('NewSignUpNotifier', Time.now, self.id)
  end  
  
  # Inform admin about cancellations of accounts
  def async_notify_on_cancellation
     DelayedJob.enqueue('CancelAccountNotifier', Time.now, self.inspect)
  end  
  
  # Inform admin if someone confirms an account
  def notify_if_confirmed
    if attribute_changed?('confirmed_at')
      DelayedJob.enqueue('AccountConfirmedNotifier', Time.now, self.id)
    end
  end  

....
end