gistfile1.txt

#!/usr/bin/env ruby


require 'raptor'

class Posts
end

class Users
end

App = Raptor::App.new([Posts, Users])
App.run Port: 9000

Raptor.rb

module Raptor
  class App
    def run options
     require 'rack'
     Rack::Handler::WEBrick.run(app, options)
    end
  end
end