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Sender: Todd Nine <todd@spidertracks.co.nz>
Subject: Re: Possible bug in Statemanager.fetchObjectId() with Entity Id
 fields in composite id and application assigned identities?  Appears to be
 flush cascade related.
From: Todd Nine <todd@spidertracks.com>
Reply-To: todd@spidertracks.com
To: dev <dev@openjpa.apache.org>
Cc: Nate McCall <nate@datastax.com>
In-Reply-To: <1302741730.3021.38.camel@greenlantern>
References: <1302741730.3021.38.camel@greenlantern>
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Organization: Spidertracks
Date: Thu, 14 Apr 2011 13:30:03 +1200
Message-ID: <1302744603.3021.40.camel@greenlantern>
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Hi all,
  Because this has broken my build I've started fixing this issue on a
separate branch.  You can view this branch here.

https://github.com/riptano/hector-jpa/tree/compositeentityid


On Thu, 2011-04-14 at 12:42 +1200, Todd Nine wrote:

> Hi guys,
>   I've read the JPA spec several times, as well as section 4.2 in the
> 2.1.0 documentation and I believe I've mapped this relationship
> correctly.
> 
> https://github.com/riptano/hector-jpa/blob/master/src/test/java/com/datastax/hectorjpa/bean/Observe.java
> 
> I'm hitting what seems to be a bug in the internal OpenJPAStateManager
> api. This is essentially what I thought would occur on flush.
> 
> 1. User target is assigned their OID via the generator
> 2. User owner is assigne their OID via the generator
> 3. A call to StateManager.fetchObjectId() on a statemanager for the
> Observe class will return an instance of Observe.ObserveId with both
> the owner UUID and the target UUID populated since it will internally
> invoke assignObjectId(true)
> 
> 
> What I'm seeing instead
> 
> 1. User instance "target" is assigned an OID
> 2. User instance "owner" is assigned an OID.
> 3. Subsequent calls to StateManager.fetchObjectId() return an OID
> instance with either both fields null, or a single field populated
> depending on the instance that's getting flushed.  For instance, if
> I'm saving the User and cascading the observing, the "owner" uuid will
> be populated but the "target" will not.
> 
> 
> Am I doing something incorrectly?  The files that are causing the
> issues are here.
> 
> https://github.com/riptano/hector-jpa/blob/master/src/main/java/com/datastax/hectorjpa/store/EntityFacade.java line 374.  When an Observe is flushed both ID's are null, even though the relationship graph is correctly constructed.  
> 
> 
> https://github.com/riptano/hector-jpa/blob/master/src/main/java/com/datastax/hectorjpa/meta/collection/OrderedCollectionField.java line 341.  In this case, only 1 of the 2 Ids are assigned.  It seems to be assigning the entity that owns the field in the composite Id, but not the other id.
> 
> 
> 
> It appears that cascading the flush to embedded Id entities is not
> working correctly in my current usage.  Am I doing something
> incorrectly, or is this a bug?
> 
> Thanks,
> 
> Todd
> 
> 
> 
> 
> 
> 
> 
> 

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