March 2002
Intermediate to advanced
464 pages
8h 51m
English
book
Enterprise JavaBeans™ Component Architecture: Designing and Coding Enterprise Applications
by Gail Anderson, Paul Anderson
Content preview from Enterprise JavaBeans™ Component Architecture: Designing and Coding Enterprise ApplicationsBecome 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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Using Exceptions with EJBs
The J2EE architecture provides for the detection and handling of exceptions. There are two kinds of exceptions: system exceptions and application exceptions. Application exceptions indicate recoverable-type problems (for example, bad user input or a requested purchase item being unavailable). The EJB container propagates application exceptions to the remote client, who presumably will have a catch handler in place to correct the problem (if possible) or take evasive action. The NoTrackListException shown in Listing 4.3 on page 95 is an example of an application exception. Application exceptions should be subclasses of Exception.
System exceptions indicate nonrecoverable errors, such as a lost database connection or ...
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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.