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Posted to ojb-user@db.apache.org by Edson Carlos Ericksson Richter <ed...@mgrinformatica.com.br> on 2003/07/04 21:44:31 UTC

Re: Dynamic proxies and references Help

I trying some advanced config in my app, and I've found same problem. Appear
that AssertFkAssignment is missing converting Proxy to Objects.

I've tried to change the line

                    fld.getPersistentField().set(obj, refPkValues[i]);

to


fld.getPersistentField().set(ProxyHelper.getRealObject(obj),
refPkValues[i]);

in PersistenceBrokerImpl (line 737 in CVS HEAD). Now work for me, without
changing behaviour in rest of my app.

Jakob, Thomas, can you verify/confirm that? And if yes, can you fix this in
CVS?

Thanks,

Edson Richter




----- Original Message ----- 
From: "Marcus Breese" <ma...@breese.com>
To: <oj...@db.apache.org>
Sent: Tuesday, June 24, 2003 6:04 PM
Subject: Dynamic proxies and references Help



Is it possible to have recursive references while using a dynamic proxy?

For example, I have a Project class where each project can track its
parent project.

The class is laid out as such:

Project
|- id
|- name
|- parentid
|- parentidObject

Project has an interface IProject.  Also, Id, Name and parentid are
inherited from a base class.

I can retrieve the Project fine via a dynamic proxy, but when I try to
get the parentIdObject, I get the following error:

13:52:49,838 - ERROR
org.apache.ojb.broker.metadata.fieldaccess.PersistentFieldDefaultImpl -
while set field:
object class[ edu.iupui.cmg.labratj.om.Project
target field: parentIdObject
target field type: interface edu.iupui.cmg.labratj.om.IProject
object value class: $Proxy5
object value: Name: Test Project
Id: 1
PiId: 1
]

Can anyone see where I'm going wrong?

-=-= -=-= -=-= -=-= -=-= -=-= -=-= -=-= -=-= -=-= -=-=-
Marcus Breese                            mbreese@iupui.edu
IU School of Medicine              marcus@breese.com
Dept. of Biochemistry and Molecular Biology
Center for Medical Genomics / Grow Lab


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Re: mixed: PB and ODMG

Posted by Armin Waibel <ar...@code-au-lait.de>.

Hi Joerg,

----- Original Message -----
From: "Joerg Lensing" <in...@softcon-lensing.de>
To: "OJB Users List" <oj...@db.apache.org>
Sent: Monday, July 07, 2003 3:46 PM
Subject: mixed: PB and ODMG


> hello,
> in an earlier thread, there was a hint to use PB for "simple"
> activities, which need not
> odmg-transactions (and therefore better performance) and to use ODMG
for
> the more complex things. How should be the handling?

please see
http://db.apache.org/ojb/faq.html#15

> (How do i get the
> PersistenceBroker?

PersistenceBroker broker = ((HasBroker) tx).getBroker();

>Can there be more than one Transaction per thread?)

ODMG implementation currently does not support
nested tx, but you can use tx.join() to do something like

tx1.begin()
...
tx2.begin()
// do something
tx2.commit // tx2.abort()
...
tx1.join()
tx1.commit() // tx1.abort()

regards,
Armin

>
> Intended useage:
>
> 1. open odmg-transaction
> 2. make an independent read-update-write by PB (transaction will be
done
> in one go)
> 3. use odmg-transaction
> 4. make a second independetn read-update-write by BP
> 5. commit odmg-transaction
>
> an example would be nice
>
> joerg
>
>
>
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> To unsubscribe, e-mail: ojb-user-unsubscribe@db.apache.org
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>
>
>



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mixed: PB and ODMG

Posted by Joerg Lensing <in...@softcon-lensing.de>.

hello,
in an earlier thread, there was a hint to use PB for "simple" 
activities, which need not
odmg-transactions (and therefore better performance) and to use ODMG for
the more complex things. How should be the handling? (How do i get the
PersistenceBroker? Can there be more than one Transaction per thread?)

Intended useage:

1. open odmg-transaction
2. make an independent read-update-write by PB (transaction will be done 
in one go)
3. use odmg-transaction
4. make a second independetn read-update-write by BP
5. commit odmg-transaction

an example would be nice

joerg



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