Kris Verlaenen wrote:

We selected JPA and JTA because they appear to be the standards for
persistence and transaction currently.  When you say incompatible, do
you mean that the WebSphere transaction manager isn't JTA compliant,
that we are using JTA features that WebSphere does not support, or that
it is a custom transaction solution?

Note that persistence and transactions is defined as an orthogonal
concern, meaning you can easily replace it by another implementation
without having to redefine everything.  I'm more than happy to work with
you on making this work on WebSphere.  If you want to take a look at our
transaction implementation, take a look at SingleSessionCommandService:

As you can see, there are only a few calls to the transaction manager
before and after the execution of the commands (supporting both
user-defined or default transactions).  Shouldn't be too difficult to
either replace that with another transaction implementation, or make the
solution more generic to support multiple ones altogether.
I can concur that the plan was always to support other transaction models, but to target JTA first as it's an established standard. Beyond that we wanted to make sure our direction was user driven.


Quoting Allen Day <>:

I am new to this list, so I apologize if this question has been asked

It appears that drools-flow requires JTA in order to use JPA.  Is
anybody using drools-flow running on WebSphere, because WebSphere
uses its' own transaction manager (and the two don't seem
compatible).  Has anybody looked at the feature request to provide
support for resource local transactions -

We need to decide soon between Drools Flow & JBPM, and this issue
could swing in JBPM's favor.


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