Need Clarification - Request Bean vs Session Bean?

Question

Could someone clearify to me the difference between a Request bean and Session bean and when to use which one.
In a netbeans Visual Web Project I notice that the backing beans or code behind files that the web pages use are request beans but there is also a Applications Bean, Session Bean, and Another Request Bean.
What type of logic should be going where in terms of the jsp's request bean, the single session bean, and single request bean?
A few years ago when I was in school we created regular Web projects that used session beans as the backing beans which handled all the logic and passed data to and from a EJB layer which did all the Database connectivity.
And finally where do EJB fit into this style of Visual Web Projects?
Thanks,

Answer 1

So in terms of where certain types of logic goes I would so something like this login example:
User clicks a Login button, this is bound to the RequestBean, the request beans checks the session bean if user is logged in, if no then use a EJB to validate against DB, return true/false. Set user login state in the session bean? That a proper flow and useage of the different types of beans?
When all is said and done the request bean would be used to forward off actions fromt he jsp to wherever they need to go?
Edited by: avalanche333 on Jun 6, 2008 11:37 AM