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Bean-Managed Persistence Examples

Dale Green

Data is at the heart of most business applications. In J2EE applications, entity beans represent the business objects that are stored in a database. For entity beans with bean-managed persistence, you must write the code for the database access calls. Although writing this code is an additional responsibility, you will have more control over how the entity bean accesses a database.

This chapter discusses the coding techniques for entity beans with bean-managed persistence. For conceptual information on entity beans, please see What Is an Entity Bean?.

In This Chapter

The SavingsAccountEJB Example

Entity Bean Class

Home Interface

Remote Interface

Running the SavingsAccountEJB Example

deploytool Tips for Entity Beans With Bean-Managed Persistence

Mapping Table Relationships for Bean-Managed Persistence

One-to-One Relationships

One-to-Many Relationships

Many-to-Many Relationships

Primary Keys for Bean-Managed Persistence

The Primary Key Class

Primary Keys in the Entity Bean Class

Getting the Primary Key

Handling Exceptions

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