DCI with ActiveSupport callbacks

gistfile1.rb

require "active_support"

module RoleA

  def self.extended(object)
    object.singleton_class.class_eval do
      puts "blah"
      puts object.inspect
      include ActiveSupport::Callbacks
      define_callbacks :save
      set_callback :save, :before do
        puts "before save"
      end
    end
  end

  def save
    run_callbacks :save do
      puts "#save"
    end
  end

end

o = Object.new
o.extend(RoleA)
o.save