This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
An EJB is a special class that works with an application server container. The container knows how to inject resources and add wrappers for security/transactions. An EJB is identified with an annotation or in an XML file so the container knows it is special.