# File lib/Borges/RequestHandler/Registry.rb, line 21
  def handle_key_request(req)
    key = req.handler_key

    handler = @handlers_by_key[key] || nil

    if (not handler.nil?) && handler.active? then
      return handler.handle_request(req)
    else
      return handle_expired_request(req)
    end
  end