Skip to Main Content
VisualAge for Java Version 3: Persistence Builder with GUIs, Servlets, and Java Server Pages
book

VisualAge for Java Version 3: Persistence Builder with GUIs, Servlets, and Java Server Pages

by Ueli Wahli, Greg Behrend, Daniel Peter
March 2000
Beginner to intermediate content levelBeginner to intermediate
472 pages
11h 17m
English
IBM Redbooks
Content preview from VisualAge for Java Version 3: Persistence Builder with GUIs, Servlets, and Java Server Pages
Chapter 8. Transactions 153
Test
During the test you can observe this behavior:
When you open twice a CustomerDetailsView for the same Customer
object,you canchange itin both views without an error. The last view that
you save wins, and the conflict is not detected. Why? In this sample
optimistic locking is used, copy-on-read to be precise, and no optimistic
predicate was defined. That is we allow collisions but we do not detect
them. You could try to avoid that several CustomerDetailsViews can be
openedfor the sameCustomerobject within the same application, butthis
still would not solve the potential risk of collisions, because another user
still could change the same Customer object in the meantime. So the best
solution when you use copy-on-read ...
Become 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,
and much more.
Start your free trial

You might also like

Pure Java Server Pages™

Pure Java Server Pages™

James Goodwill
WebSphere Application Server - Express: A Development Example for New Developers

WebSphere Application Server - Express: A Development Example for New Developers

Moore William, Mark Buensalido, Gwendolyn Gaumond, Bo Gong, Ilaria Gorla, Doug Grove, Stelios Psarras, Pasi Valjus, Ryan Karchner
Enterprise Java Programming with IBM WebSphere

Enterprise Java Programming with IBM WebSphere

Peter M. Jakab, Russell Stinehour, Kyle Brown, Jim Amsden, David Pitt, Gary Craig, Mark Weitzel, Greg Hester, Daniel Berg

Publisher Resources

ISBN: 0738415820Purchase bookAdditional Material