db-jdo-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Guido Anzuoni" <ganzu...@gmail.com>
Subject Re: [DISCUSS] getPersistenceManagerProxy
Date Mon, 12 Feb 2007 12:39:11 GMT
It is not clear when the real PersistenceManager will get closed.
In a RESOURCE_LOCAL scenario close on the proxy could be propagated to the
real PM before/after
deassociation in the Thread-local (why an implementation specific variable ?
Is it really needed to be implementation specific ?)
In a JTA scenario things get a little complicated.
The real PM could be closed by a Synchronization.afterCompletion()
registered byPersistenceManagerProxy when
it associate the PM with the transaction, but there could be ordering issues
with other Synchronization objects referencing
the same PM.
Looking at the proposed implementation of getPersistenceManagerProxy() in
issue JDO-445 I have seen that
TransactionSynchronizationRegistry is required and leaving as a value-add
the possibility for other env.
I can obviously wrong, but I think that the whole feature can be implemented
on top of existing impl (well, PMF must support
JTA TransactionType in order to work in a JTA-controlled transactions).
Is it possible to design an architecture where getPersistenceManagerProxy()
delegates to PersistenceManagerProxyProvider ?
Is it possible to add to the spec that PMF impl must not rely on a
particular PersistenceManagerProxyProvider impl?

Guido

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message