I'm experimenting with EJB3

I would like to inject a stateful session bean into a servlet, so that each user that hits the servlet would obtain a new bean.

Obviously, I can't let the bean be an instance variable for the servlet, as that will be shared. And apparantly injecting local variables isn't allowed.

I can use the new operator to create a bean, but that doesn't seem the right approach.

Is there a right way to do this? It seems like what I'm trying to do is fairly straightforward, after all, we would want each new customer to find an empty shopping cart.