Project Architchiture related query

Hi

I am using EJB 3 stateful session beans in my project .

I am directly contatcing my DAOFactory from my bean class itself ??

Is it mantadatory to use ServiceLayer , and specify the transactions in it (ServiceLayer) to contact to my DAOFactory ??

Thank you.

Ravi,
No pattern is mandatory. I think your question is whether it is a good idea.

I think your question is whether it is a good idea.

Yes that is the question what i want to ask .