Java™ Application Development on Linux - Dator

22.2 EJBs: You Don’t Know Beans?499Example 22.3 is a listing of our home interface. It looks like an emptyshell, but it is all that we need. The rest is handled by J2EE.Example 22.3 Sample (remote) home interfacepackage com.jadol.budgetpro;import javax.ejb.*;import java.rmi.*;/*** Remote Home Interface*/public interfaceMoneyHomeextends EJBHome{public Moneycreate()throws CreateException, RemoteException;} // interface MoneyHome22.2.4 Summarizing the PiecesWith these three pieces—the session bean, the remote interface, and the homeinterface—we can see the structure of the key pieces of an EJB. Let’s reviewwhat we have:<strong>Application</strong> objectMoneyMoneyHomeMoneyBeanExtends/implementsEJBObjectEJBHomeSessionBeanTalked about asremote interfacehome interfacethe implementation22.2.5 EJBLocalHome and EJBLocalObjectWhen the session or entity bean is going to be referenced by application codethat resides on the same host as the bean, there are variations on the home andremote interfaces that allow for more efficient execution. When you know thatthe beans are local to this host, you should use a local interface (Example 22.4)