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EJB 3 in Action by Derek Lane, Reza Rahman, Debu Panda

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Chapter 7. Implementing domain models

This chapter covers

  • Domain modeling concepts
  • Entities and entity identity
  • Relationships between entities

Most of today’s enterprise systems save their data into a relational database of some kind. This is why persistence—the process of saving and retrieving data from permanent storage—has been a major application development concern for many decades. As a matter of fact, some authoritative sources claim that a great majority of enterprise development efforts concentrate on the problem of persistence.

Arguably, after JDBC, EJB 2 entity beans have been the most significant groundbreaking solution to the problem of persistence in Java. Unfortunately, many of us who developed entity beans experienced an ...

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