contents preface xix acknowledgments xxi about this book xxiv PART 1 OVERVIEW OF THE EIB LANDSCAPE........................... What's what in EJB 3 3 1.1 EJB overview 5 EJB as a component 5"E[B as a framework 7 Layered architectures and EJB 9.Why choose EJB 3?12 1.2 Understanding EJB types 14 Session beans 16.Message-driven beans 16.Entities and the Java Persistence API 17 1.3 Getting inside EJB 19 Accessing E[B services:the E[B container 20.Accessing PA services:the persistence provider 20.Gaining functionality with EJB services 21 ixix preface xix acknowledgments xxi about this book xxiv PART 1 OVERVIEW OF THE EJB LANDSCAPE .......................... 1 1 What’s what in EJB 3 3 1.1 EJB overview 5 EJB as a component 5 ■ EJB as a framework 7 Layered architectures and EJB 9 ■ Why choose EJB 3? 12 1.2 Understanding EJB types 14 Session beans 16 ■ Message-driven beans 16 ■ Entities and the Java Persistence API 17 1.3 Getting inside EJB 19 Accessing EJB services: the EJB container 20 ■ Accessing JPA services: the persistence provider 20 ■ Gaining functionality with EJB services 21 contents