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From Marc Logemann ...@logemann.org>
Subject Re: detachment of fetch-groups doesnt work
Date Thu, 09 Apr 2009 11:11:18 GMT
here we go: https://issues.apache.org/jira/browse/OPENJPA-1030

---
regards
Marc Logemann
http://www.logemann.org
http://www.logentis.de




Am 09.04.2009 um 13:05 schrieb Marc Logemann:

> Hi,
>
> explicitly detaching is only possible via OpenJPA product API right?  
> No, i have not done that explicitly, it was implicit at context end.
> And yes, as written earlier, i experimented with all 3 DetachState  
> levels and "all" worked like expected. I even had an annoyance with  
> "loaded" when explicitly defined in contrast to leaving it out  
> alltogether.
>
> I will file a jira with mainly my main mail from yesterday.....
>
> ---
> regards
> Marc Logemann
> http://www.logemann.org
> http://www.logentis.de
>
>
>
>
> Am 09.04.2009 um 12:30 schrieb Craig L Russell:
>
>> It's worth a JIRA.
>>
>> Detachment occurs either at context end or at explicit detach.
>>
>> Does this anomalous behavior occur if you explicitly detach your  
>> entities, or only implicitly at context end?
>>
>> And have you changed the openjpa.DetachState configuration property  
>> which governs how objects are detached?
>>
>> Craig
>>
>> On Apr 8, 2009, at 11:57 PM, Marc Logemann wrote:
>>
>>> is this worth a JIRA ?
>>>
>>> ---
>>> regards
>>> Marc Logemann
>>> http://www.logemann.org
>>> http://www.logentis.de
>>>
>>>
>>>
>>>
>>> Am 08.04.2009 um 23:50 schrieb Tedman Leung:
>>>
>>>> just as additional information, this is also true about any lazy
>>>> PersistentCollection too. I found that if I accessed the  
>>>> collection while
>>>> it is in an attached state the values are available, but as soon  
>>>> as it
>>>> becomes detached the collection becomes null even if I had just  
>>>> accessed
>>>> it prior to detachment.
>>>>
>>>> I'm not entirely sure if this is a bug or if it's suppose to work  
>>>> this way
>>>> when detached.
>>>>
>>>> On Wed, Apr 08, 2009 at 05:18:48PM +0200, Marc Logemann wrote:
>>>>> Hi,
>>>>>
>>>>> with OpenJPA 1.2.0 i am having some problems detaching  
>>>>> attributes which
>>>>> are in a fetch-group. My persistence.xml is:
>>>>>
>>>>> <property name="openjpa.DetachState" value="fetch-
>>>>> groups(DetachedStateField=true)"/>
>>>>>
>>>>> My Domain class header:
>>>>>
>>>>> @FetchGroups({
>>>>> @FetchGroup(name="posDetail", attributes={
>>>>>     @FetchAttribute(name="deliveryAddresses")
>>>>> })
>>>>> })
>>>>> public class Order {
>>>>>
>>>>> @OneToMany(mappedBy = "order", cascade = CascadeType.ALL, fetch =
>>>>> FetchType.LAZY)
>>>>> List<DeliveryAddress> deliveryAddresses;
>>>>> ...
>>>>> }
>>>>>
>>>>> (in fact i also have the @LoadFetchGroup("posDetail")  to be  
>>>>> sure.....)
>>>>>
>>>>> Now when i am leaving my DAO layer which means that the  
>>>>> persistence
>>>>> contexts ends, the delivery address is "null" even though its in  
>>>>> the
>>>>> fetch group. I even queried for the fetch group in the DAO before
>>>>> leaving it via:
>>>>>
>>>>> OpenJPAQuery oQuery =  
>>>>> OpenJPAPersistence.cast(em.createQuery("select o
>>>>> from Order o where o.oid = ?1"));
>>>>>     oQuery.setParameter(1, oid);
>>>>>     //
>>>>> oQuery 
>>>>> .getFetchPlan().setMaxFetchDepth(3).addFetchGroup("posDetail");
>>>>>     List list = oQuery.getResultList();
>>>>>     if(list != null && list.size() > 0)  {
>>>>>         return (Order)list.iterator().next();
>>>>>     }
>>>>>
>>>>> I know it must be a detach issue because with the following
>>>>> persistence.xml it works (but i definitely wont use this config in
>>>>> production)
>>>>>
>>>>> <property name="openjpa.DetachState" value="all"/>
>>>>>
>>>>> Am i missing something here? When i debug my DAO, the  
>>>>> deliveryAddress
>>>>> attribute is populated but as soon as i leave my DAO, its lost.
>>>>>
>>>>> ---
>>>>> regards
>>>>> Marc Logemann
>>>>> http://www.logemann.org
>>>>> http://www.logentis.de
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>> -- 
>>>>                                                        Ted Leung
>>>>                                                         
>>>> tedman@sfu.ca
>>>>
>>>> I can speak Canadian, American, Australian, and little English.
>>>>
>>>
>>
>> Craig L Russell
>> Architect, Sun Java Enterprise System http://db.apache.org/jdo
>> 408 276-5638 mailto:Craig.Russell@sun.com
>> P.S. A good JDO? O, Gasp!
>>
>


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