Java™ Application Development on Linux - Dator

492Chapter 21Introduction to Enterprise JavaBeans21.5WHAT YOU STILL DON’T KNOWWhere to begin? Your humble authors themselves are still learning the intricaciesof J2EE. We have more or less ignored message beans. We have not describedthe local and local home interfaces, concentrating instead on the remoteaccess of beans. This is because remote access is what client applications willmost often use. But entity beans, for example, can only call one anotherthrough the local interface, and, in practice, a session bean will likely provideremote access but call any other beans through a local interface.A quick examination of your local bookstore’s computer books sectionwill reveal that J2EE is a vast topic, just by the number of books on the topicand their thickness. Our goal here is to give you enough to make a quick startin using EJBs on a Linux-hosted application server. From there—well, thosethick books are probably your next stop.21.6RESOURCES• http://java.sun.com/products/jndi/tutorial/trailmap.htmlis Sun’s JNDI tutorial.• Sun has a J2EE tutorial (http://java.sun.com/j2ee/1.4/docs/tutorial/doc/index.html) that is a great place to start.