Head First EJB

Chapter 3. The Client View: Exposing Yourself

You can’t keep your bean private. Clients need to see what you’ve got. (Except for message-driven beans, which don’t have a client view). The Advice Bean exposed the getAdvice() method in its Component interface—the place where you declare business methods. But that’s not all the client sees. Remember, the Advice interface extended EJBObject, an interface with methods of its own. Methods the client can see. Methods the client can call. And it works the same way with the Home interface. In this chapter, we’ll learn what you really expose to the client, and how the client works, including both Remote and local interfaces.

Objectives

The Client View

Official:		What it really means:
2.1	Identify correct and incorrect statements or examples about the client view of a session bean’s local and remote home interfaces, including the code used by the client to locate a session bean’s home interface.	You have to know everything about the home interface. This particular objective doesn’t include the special characteristics of an entity bean home, but most of the details about the client’s view of a bean’s home are still covered in this objective (and this chapter). For example, you have to know exactly which methods are in javax.ejb.EJBHome (the Remote home interface), and which methods are in javax.ejb.EJBLocalHome (the local home interface). And it’s not ...