This book takes the reader through the details of the EJB 3.0
architecture, and shows how EJB can be used to develop powerful,
standards-based backend business logic. It is designed to be the first
and only comprehensive beginning or introductory EJB 3 book to market.
The book offers practical insights into the entire EJB architecture,
covering all areas of the EJB 3.0 specification, including its new
persistence framework, simplified development model, and other key new
features. In addition, it covers upgrade headaches: common issues
encountered when migrating from EJB 2.1 to EJB 3.0, highly relevant to
existing EJB developers.