Hi Juergen,
On Feb 23, 2009, at 5:57 AM, Juergen Weber wrote:
Hi,
we are looking for a transaction manager, Corba OTS based if
possible, to
manage non-J2EE DB XA transactions.
What is the current state of the Geronimo Transaction manager? Can
it be
used from outside of Geronimo?
Easily. For instance, there's a codehaus project called jencks that
packages it for use in spring.
What is Geronimo Transaction manager based on? Is it JOTM, OpenEJB
or an own
implementation? There is some information that indicates that
Geronimo would
be based on JOTM
(http://howl.objectweb.org/presentations/2004ApacheConHigh-speedObjectWebLogger.ppt
)
but I believe this is no longer current, is it?
That's not current. Geronimo tm uses HOWL as does JOTM but the actual
tm implementation is separate.
I tried if the Geronimo Orb supports OTS, but it looks like it
doesn't, does
it?
ORB orb = (ORB) initialContext.lookup("java:comp/ORB");
org.omg.CORBA.Object o =
orb.resolve_initial_references("TransactionCurrent");
results in
org.omg.CORBA.ORBPackage.InvalidName: IDL:omg.org/CORBA/ORB/
InvalidName:1.0
at
org
.apache
.yoko
.orb
.OB
.InitialServiceManager
.resolveInitialReferences(InitialServiceManager.java:191)
So, even if it cannot be used as OTS, can the Geronimo Transaction
service
be used from outside of Geronimo?
Geronimo TM just does xa but does not try to do OTS. It does do
transaction import so the main obstacle to distributed xa transactions
(i..e. more than one transaction manager participating in a tx) is the
lack of a transport mechanism between tms.
BTW the source code for the tm is here:
https://svn.apache.org/repos/asf/geronimo/components/txmanager
the most recent stable code is under tags/geronimo-txmanager-
parent-2.1.1
branches/geronimo-txmanager-parent-2.1 has a lot of bug fixes for
exception handling: I think we'll be releasing this fairly soon.
trunk includes j2ca connector 1.6 spec code which doesn't really alter
the tm at all but has some other nice features.
thanks
david jencks
Thanks very much,
Juergen
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