Java EE (Java Enterprise Edition) General Discussion

I have been reading about jsf and I need a good way to call business logic/service code on user input. There are sample jsf apps on the web that use a managed bean's action method to invoke the call to business logic code. Is it good to use the the managed bean's action method to call business logic/service code to handle processing? Is there a better design pattern that I could adopt. I know that facesservlet is the controller for a jsf application. Can I use this somehow in my web app to handle calling business logic code?