1. No no no no no you have the wrong idea
2. Put your business logic that must be called on initialization in a separate method, preferably in a separate class which can be tested outside the
servlet environment. You can call that from init. Really, I'm serious about this -
test outside the servlet environment if at all possible.
3. Do NOT modify the service method, for a web application extend HttpServlet with your custom class.
4. Provide for calling this magic method from doGet or doPost - suitably protected.
Bill