For EJBs, you need an EJB server. Some EJB servers such as JBoss and, I think, Sun App server, become fully fledged J2EE servers by incorporating Tomcat to process JSPs and servlets.
SCJP 1.4, SCWCD 1.3, SCBCD 1.3
With a little knowledge, a cast iron skillet is non-stick and lasts a lifetime.