Do I really need a service layer?

Question

My web application is written using Spring MVC + Hibernate.

• My model is \"Customer\" entity POJO.
• I have got a DAO object \"CustomerDAO\", its method

Answer 1

There are other things that you at service layer. Sometime its about applying business rules before passing any action to DAO. Sometimes one service needs to interact with other services, DAO for the business rules requirement.

Tell us how you'll do without server layer and with an interface..high level idea, will help me to tell you more.