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Date: Mon, 09 Jun 2008 20:57:33 -0700
From: Craig L Russell <Craig.Russell@Sun.COM>
Subject: Re: Bidirectional relationship tests in the TCK
In-reply-to: <484CED20.5080409@artnology.com>
Sender: Craig.Russell@Sun.COM
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Hi J=F6rg,

On Jun 9, 2008, at 1:43 AM, Joerg von Frantzius wrote:

> Hello Craig,
>
> what I really meant was: when modifying state of bidirectional =20
> associations on detached objects, should those detached objects =20
> immediately reflect consistent bidirectional state in the VM even =20
> before attaching? E.g. set a one-to-one association from one side, =20
> and immediately see the newly associated object from the other side.

Well, no. Detached objects are not associated with a =20
PersistenceManager and so flush() or commit() cannot by definition be =20=

applied to them. So there is no specified behavior that applies to =20
relationships of detached objects.
>
> "15.3 Relationship Mapping" says that "Regardless of which side =20
> changes the relationship,
> flush (whether done as part of commit or explicitly by the user) =20
> will modify the datastore to
> reflect the change and will update the memory model for consistency."
>
> There is no flush when modifying detached objects, so this doesn't =20
> really sound like the memory model should get updated before the =20
> detached objects are attached again and a flush actually happens. =20
> =46rom an application programmer's point of view, it would of course =20=

> be desirable if behaviour was consistent both in attached and =20
> detached state.

It is consistent. If you flush or commit, all the specified behavior =20
occurs, regardless of where the changes were made (attached or =20
detached).

Once the detached object is brought into the domain of a =20
PersistenceManager via makePersistent, the flush and commit behavior =20
applies.

Regards,

Craig
>
>
> Regards,
> J=F6rg
>
> Craig L Russell schrieb:
>> Hi J=F6rg,
>>
>> On Jun 6, 2008, at 10:30 AM, Joerg von Frantzius wrote:
>>
>>> Sorry for not having had any time to look into this more =20
>>> thoroughly yet. I'll hopefully find it next week.
>>>
>>> I think I experienced problems with changing bidirectional =20
>>> relationships on detached objects. Now I'm not sure whether the =20
>>> spec intended those to be managed as well?
>>
>> Sure, any change to a persistent field of a detached object should =20=

>> be reflected in the database upon reconnection and commit.
>>
>> If you can write a test case, we'd be happy to consider adding it =20
>> to the TCK.
>>
>> Craig
>>>
>>>
>>> Craig L Russell schrieb:
>>>> HI J=F6rg,
>>>>
>>>> On May 27, 2008, at 9:51 AM, Joerg von Frantzius wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> when looking at the relationship tests in =20
>>>>> org.apache.jdo.tck.mapping, it seems that the tests for =20
>>>>> bidirectional integrity only test changing relationships from =20
>>>>> the "mapped-by" side of the relationship? That's my impression =20
>>>>> at least from looking at the method names e.g. in =20
>>>>> Relationship1ToManyAllRelationships.java.
>>>>
>>>> There are a few relationship tests, and the intent was (is) to =20
>>>> test changing relationships from both sides.
>>>>
>>>> If you can't find what you're looking for (in all the tests) =20
>>>> please let us know.
>>>>
>>>> Craig
>>>>>
>>>>>
>>>>> I'm asking this because I believe to see inconsistencies with =20
>>>>> bidirectional relationships in the RI.
>>>>>
>>>>> Regards,
>>>>> J=F6rg
>>>>>
>>>>> --=20
>>>>> =
____________________________________________________________________
>>>>> artnology GmbH - Milastra=DFe 4 - 10437 Berlin - Germany
>>>>> Gesch=E4ftsf=FChrer: Ekkehard Blome (CEO), Felix Kuschnick (CCO)
>>>>> Registergericht: Amtsgericht Berlin Charlottenburg HRB 76376 UST-=20=

>>>>> Id. DE 217652550
>>>>>
>>>>
>>>> Craig Russell
>>>> Architect, Sun Java Enterprise System =
http://java.sun.com/products/jdo
>>>> 408 276-5638 mailto:Craig.Russell@sun.com
>>>> P.S. A good JDO? O, Gasp!
>>>>
>>>
>>>
>>> --=20
>>> ____________________________________________________________________
>>> artnology GmbH - Milastra=DFe 4 - 10437 Berlin - Germany
>>> Gesch=E4ftsf=FChrer: Ekkehard Blome (CEO), Felix Kuschnick (CCO)
>>> Registergericht: Amtsgericht Berlin Charlottenburg HRB 76376 UST-=20
>>> Id. DE 217652550
>>>
>>
>> Craig Russell
>> Architect, Sun Java Enterprise System http://java.sun.com/products/=20=

>> jdo
>> 408 276-5638 mailto:Craig.Russell@sun.com
>> P.S. A good JDO? O, Gasp!
>>
>
>
> --=20
> ____________________________________________________________________
> artnology GmbH - Milastra=DFe 4 - 10437 Berlin - Germany
> Gesch=E4ftsf=FChrer: Ekkehard Blome (CEO), Felix Kuschnick (CCO)
> Registergericht: Amtsgericht Berlin Charlottenburg HRB 76376 UST-Id. =20=

> DE 217652550
>

Craig Russell
Architect, Sun Java Enterprise System http://java.sun.com/products/jdo
408 276-5638 mailto:Craig.Russell@sun.com
P.S. A good JDO? O, Gasp!


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