#6 Ibatis and Hibernate DAO semantics differ in locking policy

[elca-ams]

In hibernate, deletion of a concurrently modified
entity causes an OptimisticLockingFailureException to
be thrown. In Ibatis, such a request suceeds.

[elca-ams]

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The Hibernate DAO no longer checks versions on delete, but
the GenericRepository does.

Nevertheless, unification of the approaches should be evaluated.