Confusion about Kodo and JCA

Hi,
I'm a bit confused about Kodo's Connection Architecture strategy. It is my understanding that
PMF's can be built to use the connection architecture. Along this line, one would configure the
ConnectionFactory or ConnectionFactoryName, and possibly the ConnectionFactory2 and
ConnectionFactory2Name properties in a PMF. The result of the PMF implementation supporting the
connection architecture is nice integration with the application servers in terms of security,
transaction, and connection management. One can lookup in JNDI a reference to a Kodo PMF that
supports datastore transactions or to another one that supports optimistic transactions or to
another one that supports NTR, and with proper settings of the transactional properties and suitable
application code, one's sesson bean will work.
But from what I can see of Kodo's JDOPersistenceManagerFactory class, it, itself, implements the
ManagedConnectionFactory interface, meaning, I think, that this class is resource adaptor. And that
the part that confuses me. Why would Kodo be a resource adaptor? I thought it used a resource
adaptor, which I think is the same thing as a connection factory.
Anyway, I'm puzzled, and I'm hoping that someone could straighten me out.
David Ezzio

David-
The fact that Kodo can integrate into an application server as a
Resource Adaptor, and section 3.2.2 of the specification that says that
the PersistentManagerFactory should be able to utilize a Resource
Adaptor to obtain connections to the data store are two separate issues.
We implement Kodo itself as a Resource Adaptor in order to provide ease
of integration into recent application servers. Your confusion is
understandable, since we do not actually yet support the use of Resource
Adaptors as the Connection Factories as per section 3.2.2.
Does that make sense?
David Ezzio <[email protected]> wrote:
Hi,
I'm a bit confused about Kodo's Connection Architecture strategy. It is my understanding that
PMF's can be built to use the connection architecture. Along this line, one would configure the
ConnectionFactory or ConnectionFactoryName, and possibly the ConnectionFactory2 and
ConnectionFactory2Name properties in a PMF. The result of the PMF implementation supporting the
connection architecture is nice integration with the application servers in terms of security,
transaction, and connection management. One can lookup in JNDI a reference to a Kodo PMF that
supports datastore transactions or to another one that supports optimistic transactions or to
another one that supports NTR, and with proper settings of the transactional properties and suitable
application code, one's sesson bean will work.
But from what I can see of Kodo's JDOPersistenceManagerFactory class, it, itself, implements the
ManagedConnectionFactory interface, meaning, I think, that this class is resource adaptor. And that
the part that confuses me. Why would Kodo be a resource adaptor? I thought it used a resource
adaptor, which I think is the same thing as a connection factory.
Anyway, I'm puzzled, and I'm hoping that someone could straighten me out.
David Ezzio--
Marc Prud'hommeaux [email protected]
SolarMetric Inc. http://www.solarmetric.com
Kodo Java Data Objects Full featured JDO: eliminate the SQL from your code

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