November 2004
Intermediate to advanced
614 pages
14h 57m
English
book
WebSphere Business Integration Server Foundation V5.1 Handbook
by Peter Kovari, Lisa Boardman, Giles Dring, Richard Johnson, Hirotake Kitabayashi, Salman Moghal, Raphael Mueller, Sudhakar Nagarajan, Yu Zeng
Content preview from WebSphere Business Integration Server Foundation V5.1 Handbook
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466 WebSphere Business Integrator Server Foundation V5.1 Handbook
Optimistic Concurrency Control Decision
Optimistic concurrency always implies that deadlocks are possible, because no
real lock is required on the object until the transaction is about to commit.
However, lock escalation is always possible with optimistic concurrency. Even if
the transaction is started with an optimistic read intent, you still have the freedom
to decide to update the instance at a later time.
Table 17-6 Optimistic Concurrency Control Decision table
Summary
Figure 17-8 on page 467 shows a better approach to decide which Access Intent
should be chosen, taking into co ...
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