Why not getCallerPrincipal in ejbActivate and ejbPassivate?

[Jonny Andersson]

I got problem with question 6 at page 594 with answers at page 597 in HF EJB. What disturbs me is why I can�t call getCallerPrincipal in ejbActivate and ejbPassivate? But on the other hand CAN do it in ejbCreate!

This is a confusing for me because in the ejbCreate do I NOT have access to the EJBObject yet because it is not created until the entity have been created in the DB which is shown clearly at page 329, but I yet HAVE access to security information about the client according to page 338. Okay, I can accept that because there is a client that is currently creating a new entity. But then is it confusing that I NOT have access to the information about the user, that is can call getCallerPrincipal, in ejbActivate and ejbPassivate because there do I HAVE access to the EJBObject and the entity bean is going to or has just been executing for a specific entity. Therefore can I not find a clear good reason to why I not can call getCallerPrincipal in ejbActivate and ejbPassivate and therefore is it also hard to memorize that I can�t do it.

So can anyone give a clear good non-confusing reason to why I can�t call getCallerPrincipal in ejbActivate and ejbPassivate despite I can do it in ejbCreate please?!
[ June 24, 2007: Message edited by: Jonny Andersson ]