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EJB 3 in Action, Second Edition by Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan

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Chapter 1. What’s what in EJB 3

This chapter covers

  • The EJB container and its role in Enterprise applications
  • The different types of Enterprise Java Beans (EJBs)
  • Closely related technologies such as the Java Persistence API (JPA)
  • The different EJB runtime environments
  • Innovations started with EJB 3
  • New changes with EJB 3.2

One day, when God was looking over his creatures, he noticed a boy named Sadhu whose humor and cleverness pleased him. God felt generous that day and granted Sadhu three wishes. Sadhu asked for three reincarnations—one as a ladybug, one as an elephant, and the last as a cow. Surprised by these wishes, God asked Sadhu to explain himself. The boy replied, “I want to be a ladybug so that everyone in the world will admire ...

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