April 2003
Intermediate to advanced
750 pages
16h 53m
English
book
EJB 2.0 Development with WebSphere Studio Application Developer
by Ueli Wahli, Wouter Denayer, Lars Schunk, Deborah Shaddon, Martin Weiss
Content preview from EJB 2.0 Development with WebSphere Studio Application Developer
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Introduction
Entity beans represent business or domain-specific concepts, and are typically the nouns of your system, representing fine-grained concepts such as customers and accounts. They usually represent data (entities) stored in a database. Since they represent data that is persistent in that database, changes to the bean result in changes to the database.
Entity beans allow us to objectify our data, and there are a lot of good reasons why working with objects representing the data, versus doing data access directly, is better. For example, it is a lot easier to work with objects, and they become reusable components in a system. Also, it frees us up from having to worry about developing functionality such as concurrency, transactions, security, ...
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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.