QUASAR Persistence 1.3.1 released!
QUASAR Persistence is an object-relational persistence-manager written =
in Java. Persistent objects and the corresponding or-mapping are =
described in a model. Instances of persistence classes can interact =
with the database and can be queried with a language that is oriented =
at the object model. QUASAR Persistence has an open architecture, is =
J2EE conform, and can be run standalone or be integrated in EJB =
This bugfix release is distributed as several packages ready for =
download. Visit the german website at OpenQuasar for detailed =
Major changes are:
* Permutation of database connections caused inconsistent data records
* Changes on attribute values were not applied if in a subtransaction =
all entities of a multi-valued relation were first deleted and then =
added to other entities
* Changes to single-value relations caused inconsistent records unless =
cascading delete was activated
* In connection with nested transactions repeated attempts where made =
to make newly-created entities persistent, what led to integrity =
violations on the database.
* When using the PersistenceConnectionManager, a deadlock situation =
arose when the maximum number of database connections was exceeded and =
then a connection was released.
* When using a 'root' mapping strategy, queries with joins along =
inheritance hierarchies returned wrong result sets=20
* Persistent objects that are optimistically locked can now be deleted
* It was not possible to create a persistent object with an optimistic =
* The exception handling in generel has been reviewed and revised=20
J=FCrgen Krey mailto:juergen.krey@... =
sd&m Research http://www.sdm-research.de <http://www.sdm-research.de> =
software design & management
M=FClheimer Str. 9a, 53840 Troisdorf, Germany
Tel +49 2241 9737-432, Fax -222
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