8 BMP Entity Beans

If you want to implement the manual storing and reloading of data, then use a bean-managed persistent (BMP) bean. The container manages the data within callback methods, which you must implement. All the logic for storing data to your persistent storage is included in the ejbStore method, and reloaded from your storage in the ejbLoad method. The container invokes these methods when necessary.

This chapter demonstrates simple BMP EJB development with a basic configuration and deployment. Download the BMP entity bean example from the OC4J sample code page at on the OTN Web site.

The following sections discuss how to implement data persistence:

• Creating BMP Entity Beans

• Component and Home Interfaces

• BMP Entity Bean Implementation

• Create Database Table and Columns for Entity Data