Sams Teach Yourself J2EE™ in 21 Days

Client's View

You've now learned how to specify, implement, and deploy BMP Entity beans, but how are they used? As you can probably imagine, the steps to obtain a reference to an Entity bean are similar to that for Session beans:

1.	Look up the home interface for the Entity bean from JNDI.
2.	To create a new entity instance, use the relevant home.create() method.
3.	To locate an existing entity instance, use home.findByPrimaryKey() if the primary key is known, or some other home.findXxx() finder method to obtain a Collection of matching entities.
4.	For the returned local proxy to the Entity bean, invoke the business methods defined in the local interface of the bean.

The javax.ejb.EJBLocalObject interface also defines a number of other ...