Short advice: avoid inheritance, favour composition. Some other things I would do: - Simplify API: (/service/${STATE}) - Create a dictionary of ${STATE} to R

Short advice: avoid inheritance, favour composition. Some other things I would do: - Simplify API: (/service/${STATE}) - Create a dictionary of ${STATE} to RequestHandler's for all cases, and a default case. - Divide as much functionality into reusable stateless functions. - Compose RequestHandler's with reusable functions. Now when the server receives a request with ${STATE} it can look up the appropriate handler in the dictionary and process the request.