May 2007
Intermediate to advanced
752 pages
17h 58m
English
book
Eclipse Web Tools Platform: Developing Java™ Web Applications
by Naci Dai, Lawrence Mandel, Arthur Ryman
Content preview from Eclipse Web Tools Platform: Developing Java™ Web 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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Chapter 9The Persistence Tier
I paint to systematize confusion and thus to help discredit completely the world of reality.
—Salvador Dali, About The Persistence of Memory
Java objects live in computer memory and normally vanish when the program that created them terminates. The lifecycle of most objects ends then. However, some objects must survive for a longer period of time. Databases and files are common datastores that you can use to keep these objects around for extended periods of time. The application layer that deals with mapping objects from memory to datastores is called the persistence layer, and the place where these objects are stored is called the persistence tier (see the Persistence section in Chapter 5).
The simplest type of ...
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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.
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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.