Roda-GraphQL

Instructions

• ./cli.rb server to run the server
• ./cli.rb help to see what other options are available.

Rack/Puma

1. Run rackup or puma.
2. Rack searches for a config.ru or may be passed a configuration file.
3. The Rack configuration should contain a run method, which accepts Rack application.
4. A Rack application is an Instance (not a Class) which has a #call method that accept an environment. This is called every time a request is received.

Roda

1. Roda has a base class with class methods of ::route and ::app. The route method sets a singleton variable with the supplied block. The app method returns a lambda that calls new on itself and passes the block supplied in the route method, to a #call method.
2. Roda's base calls also has an #initialize method and a #call method. Initialize stores the Rack environment passed in by when run is called by Rack. The call method is called by Rack's run method.
3. Roda is designed to require a derived class which calls ::route in its body. The block is stored in the Roda singleton class. This is executed as soon as the class is parsed by Ruby.

Application

config.ru -> application.rb -> app/application.rb