server.rb

class WelcomeController < ApplicationController
  def index
  end

  def welcome
    require 'drb'

    shared_obj = { id: params.require(:id) }

    render text: shared_obj.to_s
    def shared_obj.send_to_digi(msg)
      render text: msg
    end

    DRb.start_service('druby://localhost:9001', shared_obj)
    DRb.thread.join
  end
end