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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