If possible, eliminate the NonTxEmCloser by closing the EM immediately after each EM
invocation
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Key: AS7-3211
URL:
https://issues.jboss.org/browse/AS7-3211
Project: Application Server 7
Issue Type: Task
Reporter: Scott Marlow
Priority: Minor
Fix For: 7.2.0.Alpha1
For Queries, handoff the EntityManager to a Query object wrapper and have the Query object
finalizer close the EntityManager.
Make sure that we respect JPA 2.0 section 3.8.6 (detach objects returned from Query
object).
1. Methods that return a Query, will hand off the EM to the Query object wrapper.
2. Other methods will close the EM at the end of the EM method invocation.
When making this change, make sure that performance doesn't degrade. The cost of this
change, will be that each (transaction scoped non-tx) EM invocation will create a new
persistence context, but we can eliminate the NonTxEmCloser which has its own overhead.
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