df

gistfile1.rb

class Post < ActiveRecord::Base
  after_save PostCallbacks.new 
end

class PostCallbacks
  def after_save(post)
    Rails.queue.push(PostNotification.new(post_id,'save'))
  end
end

class PostNotification
  def initialize(post_id, action)
     @post   = Post.find(post_id)
     @action = action
  end

  def run
    case @action
    when 'create'
      ...
    when 'save'
      ...
    end
  end
end