Creating a Rails application

1. Create a new directory under <JRUBY_HOME>/samples directory called rails-warbler.

2. Go to <JRUBY_HOME>/samples/rails-warbler directory and create a sample application called hello:

   jruby -S rails hello

3. Edit the enviroment.rb file to indicate that your application does not use a database:

   Open <JRUBY_HOME>/samples/rails-warbler/hello/config/environment.rb in a text editor.

4. Remove the pound character (#) in front of line 21 to uncomment it so that it reads as follows and save:

   config.frameworks -= [ :active_record, :active_resource, :action_mailer ]

5. Use Warbler to create a war file in <JRUBY_HOME>/samples/rails-warbler/hello application directory:

   jruby -S warble

   This creates a hello.war file in the directory.