Resource adapter connection question.

[pdelanauze]

I'm looking at the example posted here concerning integration into a
J2EE container. I have tried to plug the RA ( which, btw, has an
invalid ra.xml file, to which i have a patch that i can provide )
inside glassfish without success, yet.

So, looking at the example posted here:
http://code.google.com/docreader/#p=hazelcast&s=hazelcast&t=JEEIntegration

I dont understand how hazelcast leverages the resource adapter to do
the read / writes. It seems a little off that the queue / map is
obtained before a ConnectionFactory establishes a connection. How does
it reference the connection object to access hazelcast ? Am i mis-
understanding something ?
Are there any examples related to ResourceAdapter usage within an app
server ?

Furthermore i am experiencing an issue related to transactions. There
are JPA transactions i need to manage as well as the hazelcast ones.
Since hazelcast does not yet support XA , we need to go local, but
havent yet gotten this configuration working, that's another topic
though...

Thanks for any input...
And great work guys, keep it up

[Talip Ozturk]

Hi Patrick,

Very sorry for the late response. I am not able to keep up with emails somehow.

> I'm looking at the example posted here concerning integration into a
> J2EE container. I have tried to plug the RA ( which, btw, has an
> invalid ra.xml file, to which i have a patch that i can provide )
> inside glassfish without success, yet.

What is your Glassfish version? And your hazelcast version?

> So, looking at the example posted here:
> http://code.google.com/docreader/#p=hazelcast&s=hazelcast&t=JEEIntegration
>
> I dont understand how hazelcast leverages the resource adapter to do
> the read / writes. It seems a little off that the queue / map is
> obtained before a ConnectionFactory establishes a connection. How does
> it reference the connection object to access hazelcast ? Am i mis-
> understanding something ?

Very good question. This actually same when you are using Hazelcast
Transaction too; you can obtain your queue/map first then you can
start a transaction and commit. Same goes for the ConnectionFactory..

The idea here is that a JTA transaction is tied to a Hazelcast
transaction via JCA connection. So then question becomes how come I
can obtain queue/map before starting a transaction and still have the
queue/map transaction aware...

The simple answer is that each put/remove/get/poll/offer/etc. call is
transaction aware. Transaction information is set to the ThreadContext
of Hazelcast. so when you do map.put (k,v) for example call will check
if the ThreadContext (ThreadLocal variable) has a valid transaction,
if so then the call is transactional. Does it make sense?

> Are there any examples related to ResourceAdapter usage within an app
> server ?

Here is how it is configured for JBoss:
http://code.google.com/docreader/#p=hazelcast&s=hazelcast&t=JEEIntegrationJBossSample

> Furthermore i am experiencing an issue related to transactions. There
> are JPA transactions i need to manage as well as the hazelcast ones.
> Since hazelcast does not yet support XA , we need to go local, but
> havent yet gotten this configuration working, that's another topic
> though...

I need more info for this.

Regards,
-talip

[Talip Ozturk]

Patrick,

I was able reproduce the JCA problem on Glassfish v3 and created an
issue for it.
http://code.google.com/p/hazelcast/issues/detail?id=158

I just fixed it and wrote a documentation for deploying it.
http://code.google.com/docreader/#p=hazelcast&s=hazelcast&t=JEEIntegrationGlassfishSample

Please download the latest snapshot (i just published it with the fix)
and then follow the documentation to deploy it.

-talip