September 2002
Intermediate to advanced
608 pages
14h 20m
English
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Chapter 21. Entity Beans
Our final topic in the book is the use of entity beans. Entity EJBs represent persistent data, which most commonly resides in an SQL database that will be accessed via JDBC. This is not a requirement by any means—the data could reside in any file structure the developer chooses—but most EJB container providers provide tools and utilities that greatly simplify the use of the most common data sources, while supporting something more esoteric is left completely to the developer.
In our example application, we have two candidates for making entity beans; the Team class and the Game class. We don't dynamically create new teams during the year, and although the data for a team changes, the changes do not really need to be persisted—as ...
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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.