Java interface static method workaround?

Question

We have a given REST interface:

POST /calculation
abc

This calculation can be implemented by different logical \"c

Answer 1

Stateless doesn't mean static. Stateless means that the component doesn't rely on state. I say component, because the whole implementation of your interface is actually stateless - it will not have any member variables. So multiple instances of the implementation classes are perfectly OK. Especially if you have a context to manage them - Spring or EJB for example.