1 How Do Applications Use EJBs?

This chapter discusses EJB concepts that are specified fully in the J2EE specification. The remainder of the chapters in this book show only the tasks necessary to develop your EJBs.

For more details and examples of the concepts presented in this chapter, refer to books written by Sun Microsystems that discuss EJBs and J2EE Blueprint Architecture recommendations.

This chapter includes the following topics:

• New Features of EJB 2.0

• Changes in Defaults for Oracle Application Server

• Which Type of EJB Should You Use in Your Application?

• What Makes Up An EJB?

• What Container Services Can You Use for EJBs?