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Daniel Doubrovkine (aka dB.) is one of the tallest engineers at He founded and exited a successful Swiss start-up in the 90s, worked for Microsoft Corp. in Redmond, specializing in security and authentication, dabbled in large scale social networking and ran a big team that developed an expensive Enterprise product in NYC. After turning open-source cheerleader a few years ago in the worlds of C++, Java and .NET, he converted himself to Ruby and has been slowly unlearning everything he learned in the last 15 years of software practice. Daniel has posted 46 posts at DZone. You can read more from them at their website. View Full User Profile

Grape Mounted behind Goliath

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Got a chance to play with Goliath for a bit. You don’t need to do much work to mount Grape behind it. Grape figures out content-negotiation and formatting for you, so just stream the response through Goliath.

    module Acme
      class Ping < Grape::API
        format :json
        get '/ping' do
          { ping: "pong" }
      class App < Goliath::API
        use Goliath::Rack::Params
        use Goliath::Rack::Render
        def response(env)


Tests for something like this are a little bit tricky, because Goliath is fully asynchronous.

    describe Acme::API do
      it "ping" do
        with_api Acme::App do
          get_request(path: "/api/ping") do |async|
            async.response.should == { ping: "pong" }.to_json

Working code in

There’s also a very complete demo with asynchronous IO and PostgreSQL here. Haven’t tried it, but looks very promising.

Published at DZone with permission of its author, Daniel Doubrovkine. (source)

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