A PersistenceUnit/JVM -wide in-memory Lock manager for optimistic transaction
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Key: OPENJPA-639
URL: https://issues.apache.org/jira/browse/OPENJPA-639
Project: OpenJPA
Issue Type: Wish
Reporter: Pinaki Poddar
Under optimistic transaction model, OpenJPA detects lock violations a) by
checking version stamps b) at commit time.
It is non-trivial to recover from a failure detected at commit time. Hence the
proposal is for a lock manager that obtains in-memory locks on object.
A combination of
a) Lock objects in Java 5 and
b) a capability to find other instances that represent the same database record
within i) the same JVM or ii) in the same persistent unit
can be a good starting point for such a feature.
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