I have been looking into RESTful web services in Java and most of the approaches I have found look to be rather bloated. These include approaches from NetBeans, Spring 3, and EJB using Singletons.

I may be wrong so please feel free to correct me but these all 'feel' like very complicated solutions to a relatively simple problem.

Can anyone suggest a very simple and lightweight approach to doing RESTful webservices in java?

I am not convinced MVC is necessary on the back end for these, instead I am looking at doing clean vertical slices.

I will not need persistence unless it can be wired to mongoDB - so I don't need any ORM mapping.

java rest
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