May 2001
Intermediate to advanced
1088 pages
30h 13m
English
Content preview from Special Edition Using Java™ 2 Enterprise EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Creating a CMP Entity Bean Under EJB 2.0
Although container-managed persistence in EJB 1.1 provided a good starting point for developers, it leaves a lot of things up to the container providers. This omission gives the container providers a lot of flexibility; however, it also means that the container providers can skimp on some of the features.
When you move an EJB 1.1 CMP bean from one application server platform to another, you must go through the pain of mapping the bean to the database all over again because each vendor does it differently. Queries can be especially painful because of the variety in query languages. EJB 2.0 addresses some of these problems by creating a standard query language (EJBQL). It also changes the format of the implementation ...
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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.