Status: New
Owner: ----

New issue 597 by [email protected]: Persist Extension: UnitOfWork.begin() throws IllegalStateException when called multiple times
http://code.google.com/p/google-guice/issues/detail?id=597

Version: guice-persist-3.0-rc2

The implementation of UnitOfWork.begin() throws exception using precondition:

Preconditions.checkState(null == entityManager.get(),
"Work already begun on this thread. Looks like you have called UnitOfWork.begin() twice"
         + " without a balancing call to end() in between.");

The javadoc and documentation claims that unit of works can be nested and the begin() method can be called multiple times with no harm. Moreover every call to Provider<EntityManager>.get() calls that begin() method if the work of unit is not in progress.

Why the precondition was added?

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