Mastering EJB系列的第四版。深入介绍了EJB3.0带来的变化，包括Java persistence API以及如何在EJB中使用POJO实体。
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What's new with Mastering EJB 3.0:

- More than 50% new and revised material
- Four new chapters and one new appendix covering the latest features of the new release
- Basic and advanced concepts (such as inheritance, relationships, and so on) of Java Persistence API defined entities
- Information on integrating EJB applications with the outside world via the Java EE Connector technology
- Tips and techniques for designing and deploying EJB for better performance
- Best practices for EJB 3.0 application design, development and testing
- Complete usage of EJB annotations along with equivalent XML configuration
- Tricks and traps of EJB deployment
- JBoss Workbook that discusses the exercises for each chapter (although the chapters are themselves vendor-agnostic)