Scottish Ruby Conference Charity Tutorial Exercise #2

AppServerSetup.rb

class AppServer
    attr_accessor :port, :admin_password
end

class Configuration
    attr_accessor :tail_logs, :max_connections, :admin_password
    
    def app_server
        if block_given?
            if @app_server.nil?
                @app_server = AppServer.new()
            end
            yield @app_server
        end
        @app_server
    end
end

def configure
    ret = Configuration.new()
    yield ret
    ret
end

configuration = configure do |config|  
  config.tail_logs = true  
  config.max_connections = 55  
  config.admin_password = 'secret'  
  config.app_server do |app_server_config|  
    app_server_config.port = 8808  
    app_server_config.admin_password = config.admin_password  
  end  
end  
  
puts configuration.class # => Configuration  
puts configuration.tail_logs # => true  
puts configuration.app_server.admin_password # => secret