using(org.eclipse.jetty => "Jetty") do
  class RackHandler < Server::Handler::AbstractHandler
    attr_accessor :app

    def self.build(endpoint)
      new.tap {|h| h.app = endpoint }
    end

    def handle(target, base_request, request, response)
      lazy_env = LazyRackEnv.new(request)
      env = Hash.new {|h,k| h[k] = lazy_env[k] }

      status, headers, body = @app.call(env)
      response.status = status.to_i
      base_request.handled = true

      headers.each do |header, value|
        response.set_header header, value
      end

      writer = response.writer
      body.each { |part| writer.print part }
    end
  end

  # org.eclipse.jetty.server.Server
  class Server::Server
    # org.eclipse.jetty.util.thread
    include Util::Thread

    def self.start_rack(endpoint, options = {})
      new(options[:port] || 8080).tap do |server|
        server.thread_pool = QueuedThreadPool.new(20)
        server.handler = RackHandler.build(endpoint)
        server.start
        server.join
      end
    end
  end
end