Sams Teach Yourself EJB in 21 Days

Designing a CMP Entity Bean

Figure 11.2 shows the design of the Order component. The OrderEJB container-managed entity bean implements the javax.ejb.EntityBean interface. It implements the methods setEntityContext(), unsetEntityContext(), ejbActivate(), ejbPassivate(), ejbLoad(), ejbStore(), and ejbRemove() as defined in the javax.ejb.EntityBean interface. It also implements the ejbCreate() and ejbPostCreate() methods.

Figure 11.2. Order entity bean design.

An OrderEJB entity bean class consists of the persistent fields orderId, studentId, orderDate, status, and amount. You do not code them as instance variables in the entity bean class. Instead, ...