daemon.rb

class Daemon
  
  def handle_payload(payload)
    event_handler = EventHandler.new(payload[:id], payload)
    event_handler.send(payload[:event])
  end
  
end

event_handler.rb

class EventHandler
  
  def initialize(id, payload)
    @id = id
    @payload = payload
  end
  
  def created
    model = model_from_payload.find(@id)
    model.write
  end
  
  alias_method :created, :updated
  
  def destroyed
    model_from_payload.delete_by_mac_address(@payload)
  end
  
  def model_from_payload
    "PXEConfGen::#{@payload[:model]}".constantize
  end

end