Sinatra deferred reaction

config.ru

require 'bundler/setup'

require './lib/poi_api.rb'

map '/' do
  run PoiApi::App
end

Gemfile

source 'https://rubygems.org'

# Specify your gem's dependencies in poi_api.gemspec
gem 'rack'
gem 'sinatra'
gem 'shotgun'

gistfile1.rb

require 'json'
require 'sinatra/base'

module PoiApi
  class App < Sinatra::Base
    configure :production, :development do
      enable :logging
    end

    before do
      content_type :json
    end

    get '/analytics' do
      logger.info "Before"
      late do
        puts "Yehi!"
      end
      logger.info "After"
      "Yes!"
    end

    private

    def late(&block)
      Thread.new do
        sleep 0.5
        block.call
      end
    end

  end
end