Grzegorz Grzybek created ARIES-2050:
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Summary: Aries JPA 2.7 shouldn't always reuse EM instance from
previous coordinations
Key: ARIES-2050
URL: https://issues.apache.org/jira/browse/ARIES-2050
Project: Aries
Issue Type: Bug
Affects Versions: jpa-2.7.2
Reporter: Grzegorz Grzybek
Assignee: Grzegorz Grzybek
I have a scenario consisting of the following call graph:
{noformat}
testService.performTest() [ @Transactional(TxType.REQUIRED) ]
+-- List<Car> cars = carDao.getAllCars()
| +-- return em.createQuery("select c from Car c", Car.class).getResultList()
| (em is injected using @PersistenceContext(unitName = "xa-test-unit"))
|
+-- carDao.createNew(car);
| +-- em.persist(car);
|
+-- newTxTestService.testNewTransaction(transactionManager.getTransaction()) [
@Transactional(TxType.REQUIRES_NEW) ]
+-- List<Car> cars = carDao.getAllCars();
+-- return em.createQuery("select c from Car c",
Car.class).getResultList()
{noformat}
The problem is that inside the method marked with
{{@Transactional(TxType.REQUIRES_NEW)}} the {{em}} proxy uses the same
underlying {{em}} instance because of:
{code:java}
Coordination getTopCoordination() {
Coordination coordination = coordinator.peek();
while (coordination != null && coordination.getEnclosingCoordination() !=
null) {
coordination = coordination.getEnclosingCoordination();
}
return coordination;
}
{code}
The coordination stack consists of (names of coordination objects):
*
txInterceptor.org.apache.aries.jpa.container.itest.bundle.blueprint.impl.TestServiceImpl.performTest
*
txInterceptor.org.apache.aries.jpa.container.itest.bundle.blueprint.impl.NewTxTestServiceImpl.testNewTransaction
* jpa
the top coordination contains {{em}} variable associated with suspended
transaction.
I'm working on a solution that properly assigns _current_ em respecting
tx-demarcated coordinations.
[~cschneider], [~gnodet], [~jbonofre] if you have an idea about the best
solution, please share.
For now I think both aries-jpa and aries-blueprint-transaction have to be fixed
(the latter one should put some magical variable to the coordination objects
pushed inside {{org.apache.aries.transaction.TxInterceptorImpl}})
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