Seam EJBContext -> 2 questions

[statelessbean]

1. How can I get EJBContext in seam?
I need to rollback transaction but without throwint basic "Exception"

2. I found this on forum archive:
http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4086986#4086986

My question is: Is this possible to get EJBContext in Tomcat 6.0 & JBossEmbedded?

[statelessbean]

Annotaton to question "1".
Without throwing EJBException