EJB 3 in Action

List of Figures

Chapter 1. What’s what in EJB 3

Figure 1.1. EJB allows development of reusable components. For example, you can implement the credit card–charging module as an EJB component that may be accessed by multiple applications.

Figure 1.2. EJB as a framework provides services to EJB components.

Figure 1.3. EJBs are regular Java objects that may be configured using metadata annotations.

Figure 1.4. Most traditional enterprise applications have at least four layers. 1) The presentation layer is the actual user interface and can either be a browser or a desktop application. 2) The business logic layer defines the business rules. 3) The persistence layer deals with interactions with the database. 4) The database layer consists of a relational ...