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From "James Strachan" <james_strac...@yahoo.co.uk>
Subject Re: Commons Messenger - How to set 'Transacted' to true?
Date Mon, 29 Apr 2002 17:19:01 GMT
Tom

Its also worth mentioning that there's a 'durable' mode that you can use to
enable durable subscriptions. You can configure this via the durable
property on a messenger element...

  <messenger name="foo" durable="true">
    <factory transacted="true" >
..

James
----- Original Message -----
From: "James Strachan" <james_strachan@yahoo.co.uk>
To: "Jakarta Commons Developers List" <commons-dev@jakarta.apache.org>;
<marsht1@nitesco.com>
Sent: Monday, April 29, 2002 6:16 PM
Subject: Re: Commons Messenger - How to set 'Transacted' to true?


> Hi Tom
>
> ----- Original Message -----
> From: "Tom Marsh" <marsht1@nitesco.com>
> > All:
> >
> > I'm trying to use messenger.rollback() when I have a problem, but JMS
> > complains that I'm not transacted. I was trying to figure out how to
> > set it in messenger.xml, but couldn't. (Using MqSeries JMS). I hard
> > coded transaction to true in sessionfactory. I'm thinking I could set
> > up for it in MessengerDigester, but I'm a little over my head......
>
> You're right its all to do with getting the MessengerDigester to create
the
> correctly configured JMS Connection / Sessions for you.
>
> One way to do it is to use whatever tools come with your J2EE app server
or
> JMS implementation and create JNDI administered objects, then just look up
> your connection factories via JNDI
>
>   <messenger name="topic" jndiDestinations="true">
>     <jndi lookupName="TopicConnectionFactory" topic="true">
>     ...
>
> There are various things relating to transactions and rollbacks here.
>
> JMS can operate in a 'transacted' mode. To enable transacted mode you just
> need to use a 'transacted' attribute in the factory element....
>
>   <messenger name="foo">
>     <factory transacted="true" >
>
> Or you could write your own SessionFactory class to create
> connections/sessions however you wish. For example it might well make
sense
> to write an XASessionFactory to create XAConnection and XASessions. Then
you
> could use it as follows...
>
>   <messenger name="foo">
>     <factory className="org.apache.commons.messenger.XASessionFactory">
> ...
>
> Then you could use your JMS provider in an XA (2 phase commit) manner.
>
> Probably working in 'transacted' mode might work for you; otherwise using
> your own factory might be better or trying the administered objects / JNDI
> route.
>
> James
>


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