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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Developing entity beans with advanced concepts
In this section, we expand the banking application to describe how we might add the following new features to our beans:
Relationships
Inheritance
Custom query methods
EJB QL examples
Relational database mapping
As in the CMP persistent fields, the CMR relationship fields must also be mapped to an actual database element at deployment time, so that the concrete code can be generated. Therefore, each CMR field is mapped to a foreign key on the table that we are relating to.
Expanded banking entity requirements
The following are the new features that we will add to our banking system:
Support for new entity bean Account— This bean has the following persistent fields defined: accountID (primary key), ...
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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.