> Thanks Remy!
>
> It is more cleare for me now.
>
> The last question. If I make a XAResource derived store implementation
that
> will call by any way a remote database (using RMI, FTP, or, maybe, just
> using "driver, uri", etc.), will it be considered as a simple sample of a
> resource participating in a distributed transaction from JTA point of
view,
> or there are more conceptal things for this kind of distributed
transaction
> and management?
No, it's just a transaction involving two (local) resource managers.
If you interested in DTMs, you can have a look at Tyrex :
http://tyrex.exolab.org
Remy