April 2026
Intermediate
491 pages
18h 4m
English
Content preview from Software Architecture and Design
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7.7 Optimistic Locking Pattern
The optimistic locking pattern helps avoid data inconsistencies with clients working in parallel. It is based on checking whether the original data has changed since it was last accessed before the data is updated.
7.7.1 Problem and Motivation
In distributed systems or in environments with multiple simultaneous users, situations can arise in which different users try to read and change the same data in parallel. Without a suitable synchronization mechanism between the various write processes, simultaneous updates could result in data inconsistencies. A change that arrives later could then inadvertently overwrite values that have already been adjusted, leading to the lost update problem.
The flow of an item ...
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