Using 2 relational datasources in one application

Hi
I was wondering if it is possible to use two PersistenceManagerFactories in
one application server pointing to two different RDBMSs, such as one Oracle
and one DB2 database, but using the same JDO Classes. In this case I would
need to have two separate mappings, and I guess you would have to specify
somehow which mapping file to generate from the mappingtool and which one to
use in each PersistenceManager, but I have not found how to do it.
Could someone please point me in the right direction?
Cheers
Sven Erik

Sven-
This is certainly possible, but we do not provide any built-in way to
automatically use different metadata files on a per-database basis,
except when using the "db" MappingFactory (which stored the mappings in
the database; in your case, each database will store its own version of
the mappings).
Another option is to make your own implementation of the fairly simple
MappingFactory interface to perform some differentiation of the
metadata. E.g., you might have it look for "mymetadata-oracle.xml" and
"mymetadata-db2.xml" depending on the database, and then pass-through
the calls to the default MetadataMappingFactory.
In article <bugg5g$mnk$[email protected]>, Sven Erik Knop wrote:
Hi
I was wondering if it is possible to use two PersistenceManagerFactories in
one application server pointing to two different RDBMSs, such as one Oracle
and one DB2 database, but using the same JDO Classes. In this case I would
need to have two separate mappings, and I guess you would have to specify
somehow which mapping file to generate from the mappingtool and which one to
use in each PersistenceManager, but I have not found how to do it.
Could someone please point me in the right direction?
Cheers
Sven Erik--
Marc Prud'hommeaux [email protected]
SolarMetric Inc. http://www.solarmetric.com

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