September 2001
Intermediate to advanced
592 pages
18h 22m
English
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Chapter 5. The Client View
Developing the Cabin EJB and the TravelAgent EJB should have raised your confidence, but it also should have raised a lot of questions. So far, we have glossed over most of the details involved in developing, deploying, and accessing these enterprise beans. In this chapter and the ones that follow, we will slowly peel away the layers of the Enterprise JavaBeans onion to expose the details of EJB application development.
This chapter focuses specifically on the client’s view of entity and session beans. Message-driven beans are not covered in this chapter—they are covered in detail in Chapter 13. The client, whether it is an application or another enterprise bean, doesn’t work directly with the beans in the EJB system. Instead, clients interact with a set of interfaces that provide access to beans and their business logic. These interfaces consist of the JNDI API and an EJB client-side API. JNDI allows us to find and access enterprise beans regardless of their location on the network; the EJB client-side API is the set of interfaces and classes developers use on the client to interact with enterprise beans.
The best approach to this chapter is to read about several features of the client view and then follow the workbook examples to see those features in action. This will provide you with hands-on experience and a much clearer understanding of the concepts. Have fun, experiment, and you’ll be sure to understand the fundamentals.
Locating Beans with JNDI
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.