May 2001
Intermediate to advanced
1088 pages
30h 13m
English
Content preview from Special Edition Using Java™ 2 Enterprise Edition
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Troubleshooting
Implementation Problems
| Q1: | Why do I get errors saying that I don't have an ejbCreate method or that the method signature of ejbCreate is invalid? |
| You may have accidentally declared the ejbCreate method to have a void type. Because CMP entity beans don't return their primary key but return null instead, you might often find yourself declaring the method as void, thinking that there is no return value. There is a return value, but it should always be null. | |
| Q2: | Why do I get errors complaining about my field variables? |
| Remember, under EJB 2.0, you don't declare the field variables as part of the class. You just create the accessor methods (which must be abstract), and let the EJB container worry about the fields. |
Deployment Problems
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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.