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User Guide
The information contained in this section applies to IBM WebSphere Commerce Version 7.0.0.9 and Feautre Pack 8. The documentation also applies to all subsequent releases and modifications until otherwise indicated in new editions.
Developing
The topics in the Developing section describe tasks performed by an application developer.
Persistent object model
WebSphere Commerce deals with a large amount of persistent data. There are numerous tables defined in the current database schema. Even with this extensive schema, however, you might need to extend or customize the database schema for your particular business needs.
WebSphere Commerce enterprise beans
The persistence layer within the WebSphere Commerce architecture is implemented according to the EJB component architecture. The EJB architecture defines two types of enterprise beans: entity beans and session beans. Entity beans are further divided into container-managed persistence (CMP) beans and bean-managed persistence (BMP) beans.
Extending the WebSphere Commerce object model
Application requirements may lead you to extend the existing WebSphere Commerce object model. The WebSphere Commerce object model can be extended in two ways.
Extending the WebSphere Commerce object model with entity beans
One situation that merits an extension to the existing WebSphere Commerce object model is addition of attributes to your application.
Generating deployed code
The code generation utility analyzes the beans to ensure that Sun Microsystems' EJB specifications are met and it ensures that rules specific to the EJB server are followed. In addition, for each selected enterprise bean, the code-generation tool generates the home and EJBObject (remote) implementations and implementation classes for the home and remote interfaces, as well as the JDBC persister and finder classes for CMP beans. It also generates the Java ORB, stubs, and tie classes required for RMI access over IIOP, as well as stubs for the home and remote interfaces

Generating deployed code

The code generation utility analyzes the beans to ensure that Sun Microsystems' EJB specifications are met and it ensures that rules specific to the EJB server are followed. In addition, for each selected enterprise bean, the code-generation tool generates the home and EJBObject (remote) implementations and implementation classes for the home and remote interfaces, as well as the JDBC persister and finder classes for CMP beans. It also generates the Java ORB, stubs, and tie classes required for RMI access over IIOP, as well as stubs for the home and remote interfaces

Before you begin

Ensure that you generated the access bean for the enterprise bean and optionally used the optimistic locking migration tool to migrate EJB projects to use optimistic locking.

Procedure

In the Project Explorer view, expand EJB Modules > WebSphereCommerceServerExtensionsData > Deployment Descriptor: WebSphereCommerceServerExtensionsData > Entity Beans.
Select the YourNewBean bean and click Java EE > Prepare for Deployment.