grape_example.rb

class EMR::Monitor::APIv1 < Grape::API
  version 'v1', :using => :path, :vendor => 'Wealthfront'
  format :json
  
  resource 'steps' do
    desc "List time length of the last step with name and state."
    params do
      requires :name, type: String, desc: "Step name substring."
      requires :state, type: String, desc: "Step state."
    end
    get "/name/:name/state/:state/last/clock_time" do
      last_step = list_last_step_by_name_state(params[:name], params[:state])
      clock_time = last_step[:end_date_time] - last_step[:start_date_time]
    end
  end
end
    
class EMR::Monitor::API < Grape::API
  mount EMR::Monitor::APIv1
end