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Rails, Merb & Sinatra can now run
on Google App Engine with JRuby!

• Everything you need installs as gems
• Works with DataMapper 0.10.1
• Free to get up and running

Getting started

We'll build a simple "Hello World" application.

1. Install the gems

   $ sudo gem install google-appengine

2. Assign an app identifier

   Simply create an application at appsopt.com,
   we'll refer to that as my-app in this document.

3. Create a folder for your app

   $ mkdir my-app; cd my-app;

4. Generate a rackup file

   In the same folder, save this as config.ru.

   require 'appengine-rack'
   AppEngine::Rack.configure_app(
     :application => 'my-app',
     :version => 1 )
   run lambda { [200, {}, "Hello World!"] }
   

5. Run your app locally

   $ dev_appserver.rb .

6. Deploy to App Engine

   $ appcfg.rb update .