long transactions

[Phil Warrick <wa...@bmed.mcgill.ca>]

Hi Thomas,

A while ago, you mentioned that although long transactions are not 
currently supported, there are a few possible approaches:

 >If you want to use the ODMG in your SessionBean scenario you have to
 > implement your own simple long transaction mechanism.
 > (In the OTM package we will have such a feature implemented.)
 > On the other hand ODMG is not the most natural fit for such a scenario.
 > I recommemd to use the PersistenceBroker API for such cases!

Can you outline what the ODMG long transaction would look like in a 
SessionBean scenario?  And how PB is perhaps a better approach?  What 
will the OTM approach look like?

Over the last few months, I have been trying several avenues for 
modifying persistent objects on remote clients and then updating them on 
the server, and I still haven't arrived at a satisfactory approach.

Any thoughts and experiences in this area would be most appreciated.

Thanks,

Phil

Re: long transactions

[Phil Warrick <wa...@bmed.mcgill.ca>]

Hi again,

One reason I ask is that long transactions seem to imply _stateful_ 
Session beans + OJB, and I haven't seen much discussion or examples 
relating to this combination (although there are lots of _stateless_ 
Session bean + OJB discussion/examples).

My core data is essentially a tree, so updates (performed on a remove 
client) implicate a large graph of persistent objects.

Does anyone have ideas/experiences to share?  Pitfalls to avoid?

Thanks,

Phil

Phil Warrick wrote:
> Hi Thomas,
> 
> A while ago, you mentioned that although long transactions are not 
> currently supported, there are a few possible approaches:
> 
>  >If you want to use the ODMG in your SessionBean scenario you have to
>  > implement your own simple long transaction mechanism.
>  > (In the OTM package we will have such a feature implemented.)
>  > On the other hand ODMG is not the most natural fit for such a scenario.
>  > I recommemd to use the PersistenceBroker API for such cases!
> 
> Can you outline what the ODMG long transaction would look like in a 
> SessionBean scenario?  And how PB is perhaps a better approach?  What 
> will the OTM approach look like?
> 
> Over the last few months, I have been trying several avenues for 
> modifying persistent objects on remote clients and then updating them on 
> the server, and I still haven't arrived at a satisfactory approach.
> 
> Any thoughts and experiences in this area would be most appreciated.
> 
> Thanks,
> 
> Phil