example of mounting an async Sinatra app under rails 3

Author: igrigorik

Gemfile

@@ -1,6 +1,7 @@
 source 'http://rubygems.org'
 
 gem 'rails', '3.0.0.beta4'
+gem 'sinatra'
 
 # async wrappers
 gem 'rack-fiber_pool', :require => 'rack/fiber_pool'

README.md

@@ -4,6 +4,7 @@ Simple async demo stack with Rails 3 + EventMachine and Fibers.
 
  * Hit localhost:3000/widgets to do a 1s async mysql query
  * Hit localhost:3000/widgets/http to make an HTTP call back to /widgets - recursive! :-)
+ * Hit localhost:3000/twitter to load a mounted async Sinatra app (reports latests rails 3 tweets)
 
 Requirements:
 

app/metal/twitter.rb

@@ -0,0 +1,8 @@
+class Twitter < Sinatra::Base
+  get '/twitter' do
+    http = EM::HttpRequest.new("http://search.twitter.com/search?q=rails+3&format=json").get
+    tweets = ActiveSupport::JSON.decode(http.response)
+    tweets = tweets['results'].collect {|t| t['text'] }.join("</br>")
+    tweets
+  end
+end

config/routes.rb

@@ -54,5 +54,9 @@
 
   # This is a legacy wild controller route that's not recommended for RESTful applications.
   # Note: This route will make all actions in every controller accessible via GET requests.
+
+  # mount async sinatra app (in metal folder)
+  match '/twitter', :to => Twitter
+
   match ':controller(/:action(/:id(.:format)))'
 end