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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EJB query language (EJB QL)
EJB QL is a query specification language for the finder and select methods of entity beans with container-managed persistence (CMP). The EJB QL statements are part of the deployment descriptor, and each statement is mapped to a corresponding finder and select method.
Abstract persistence schema
In Chapter 3, “Entity beans” on page 73, we saw that the abstract persistence schema allowed us to specify two things: define CMP data-to-object mappings and container-managed relationships (CMR). It is similar to the idea of how a database schema is defined, where the tables, fields, and relationships of the tables would be defined. In the EJB abstract persistence schema, these would be our entity beans, CMP fields, and CMR ...
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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.