Re: FW: [OJB-developers] recursive dependency with ODMG

[Thomas M. <tho...@ho...>]

Hi Matthew,

Oops, I see...
This really should solve this issue.
I think there are some other places where we'll need additional handling 
to avoid non-terminating recursions and other recursion related problems 
with circular object-nets.
(e.g. in PB.store(obj) or in PB.delete(obj))

cheers,

Thomas


Matthew Baird wrote:

> Hi Thomas,
> 
> I solved this problem by doing this:
> 
> private void lockReferences(ClassDescriptor cld, Object newTxObject, int
> lockMode)
>         throws IllegalAccessException, PersistenceBrokerException
>     {
> 		registeredForLock.put(newTxObject, newTxObject);
> 		Iterator i = cld.getObjectReferenceDescriptors().iterator();
> 		while (i.hasNext())
> 		{
> 			ObjectReferenceDescriptor rds =
> (ObjectReferenceDescriptor) i.next();
> 			Object refObj =
> rds.getPersistentField().get(newTxObject);
> 			if (refObj != null)
> 			{
> 				if (registeredForLock.containsKey(refObj))
> 				{
> 					; //nuttin
> 				}
> 				else
> 				{
> 					lock(refObj, lockMode);
> 				}
> 			}
> 		}
>     }
> 
> basically, I maintain another map of objects that are currently being locked
> (different than the registration). Then I register the newTxObject in the
> map at the beginning, and as I iterate through the reference descriptors, if
> I hit one that is already in play for locking, I just ignore it. It works
> for my test cases, but I wanted to make sure you didn't think this was a bad
> solution.
> 
> Overall, I don't think there are a lot of people using the ODMG interfaces.
> 
> 
> 
> -----Original Message-----
> From: Thomas Mahler [mailto:tho...@ho...] 
> Sent: Monday, May 13, 2002 1:08 AM
> To: Matthew Baird
> Subject: Re: FW: [OJB-developers] recursive dependency with ODMG
> 
> I'll have a look at it !
> 
> cu,
> 
> Thomas
> 
> Matthew Baird wrote:
> 
> 
>> <<OneToOneTest.zip>> 
>>could you take a look at this problem?
>>
>>both joachim and i are having trouble because of it :( 
>>
>>-----Original Message-----
>>From: Joa...@tp...
>>To: Matthew Baird
>>Sent: 5/8/02 1:35 AM
>>Subject: RE: [OJB-developers] recursive dependency with ODMG
>>
>>Hy,
>>
>>Here's the test-case.
>>
>>
>>
>>regards
>>Joachim Sauer
>> <<OneToOneTest.zip>> 
>>
>>
> 
> 
> 
>