Hey all,

I have a curly question for you all - I'm wanting to have some
processing take place on the successful commit of a JTA transaction in
our system, for example - only send customer emails out if the
transactions modifying their account commit successfully, or only
update LDAP when the database is committed.

Now, my understanding of JTA at the underlying XAResource layer is
rather limited, much like blind alley dumpster diving - I'm not sure
where I'm heading, or if I really should be.  For the most part the
code I've written seems to work a treat, but I've noticed several of
my integration tests randomly failing, and all manner of strange
errors come out of the JTA engine ( Atomikos Essentials in this case
).

The code I'm using can be seen at:

  https://gist.github.com/88bd6fa07c6da73c89dc

The two classes and short snippet show the relevant code i'm using to
enlist an instance of my resource to the transaction ( potentially
multiple instances to a single transaction - which might actually be
my problem ).

I've also posted to the Atomikos forum (
http://fogbugz.atomikos.com/default.asp?community.6.1489.3 ) about
this but as yet havn't had any successful outcome.  The problem I see
is expressed as the log warning:

04.05.2010 13:56:48.829 *WARN* [66156...@qtp-46719652-4] atomikos The
given XAResource instance is being enlisted a second time without
delist in between?

As it stands I'm not entirely sure where I'm going wrong, I have
suspicions the core of my problem is not understanding how JTA works
internally, the workflow of XAResources - and Google as I might I've
not found any resources that actually explain it.

Has anyone here done anything similar before?  Any words of wisdom or
pangs of regret you guys can share?

Mark






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