ruby singleton pattern

messages.rb

require 'yaml'

module Valet
  class Messages

    @messages ||= YAML::load_file(File.expand_path('../../../messages.yml', __FILE__))
     
     def self.text(key)
      @messages[key]['text']
     end 
 
     def self.url(key)
       @messages[key]['url']
     end 

  end
end