[ [url]http://issues.apache.org/jira/browse/JDO-445?page=comments#action_12460433[/
url] ]

Guido Anzuoni commented on JDO-445:
-----------------------------------

The simple approach would be no transaction no PM.
If we would try a more sophisticated approach, try to consider the scenario 
where
you begin with a ordinary PM and then you begin a global transaction.
Suppose you get a PM without a global transaction and begin to modify some o
bjetcs and flush.
At his point (considering for simplicity a RDBMS backend) the PM should have
 started
a local transaction on the DataSource Connection acquired.
Now you begin a global transaction.
What to do now ?
In this case you could not "join" the global transaction but you should comp
lete the local one.
But, what happen to the DataSource Connection itself used to operate until n
ow ?
Its corresponding XAResource is enlisted ?
Is still possible to commit() the local transaction on the Connection ?

For the second point, I would say that is sufficient to have a TransactionMa
nager, that can be
setup even in a J2SE environment






> Add convenience method that returns a PersistenceManager proxy
> --------------------------------------------------------------
>
>                 Key: JDO-445
>                 URL: http://issues.apache.org/jira/browse/JDO-445
>             Project: JDO
>          Issue Type: New Feature
>          Components: api2, api2-legacy
>            Reporter: Michelle Caisse
>         Assigned To: Craig Russell
>             Fix For: JDO 2 maintenance release 1
>
>         Attachments: PMProxy-patch.txt
>
>
> In Chapter 8, add a convenience method that returns a PersistenceManager proxy tha
t can be used in web and ejb containers to dynamically bind to the transaction-assoc
iated PersistenceManager.

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