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EJB Fundamentals CHAPTER 2 Chapter 1 introduced the motivation behind EJB. In this chapter, we ll dive into EJB in detail. After reading this chapter, you will understand the different types of enterprise beans. You ll also understand what an enterprise bean component is composed of, including the enterprise bean class, the remote interface, the local interface, the EJB object, the local object, the home interface, the home object, the deployment descriptor, and the Ejb-jar file. EJB technology is based on two other technologies: Java RMI-IIOP and JNDI. Understanding these technologies is mandatory before continuing. We have provided tutorials on each of these technologies in the appendixes of this book. If you don t yet know RMI-IIOP or JNDI, go ahead and read Appendix A now. Enterprise Beans An enterprise bean is a server-side software component that can be deployed in a distributed multitier environment. An enterprise bean can compose one or more Java objects because a component may be more than just a simple object. Regardless of an enterprise bean s composition, the clients of the bean deal
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