[jboss-as7-dev] EJB passivation/activation, clustering and JPA extended persistence context handling...

[Carlo de Wolf]

I think its better to treat a clustered XPC as an 'individual SFSB'.
Trying to maintain a graph around one XPC can quickly become very messy. 
Especially if different XPCs get involved. Conceptually the XPC can 
behave similar as a SFSB and we just keep proxies as references to it. 
Then it can replicate "at whim".

Carlo

On 10/24/2011 06:10 PM, Scott Marlow wrote:
> On 10/24/2011 11:17 AM, Brian Stansberry wrote:
>> On 10/24/11 9:54 AM, Scott Marlow wrote:
>>>
>>> On 10/24/2011 10:47 AM, Brian Stansberry wrote:
>>>> Throwing NotSerializableException instead of serializing means removing
>>>> support for clustering SFSBs with an XPC. That IMHO would be a pretty
>>>> major feature regression. I believe we have supported that since AS 4.2
>>>> if not earlier.
>>> I don't disagree, was just interested in hearing from anyone that
>>> thought we shouldn't do this and why. I appreciate the feedback that we
>>> should do it. :)
>>>
>> Paul had done a bunch of cool stuff around XPC serialization that he had
>> to put on the back burner to focus on the AS 6 Infinispan integration.
> I think that Paul has been continuing the ideas presented in
> http://community.jboss.org/wiki/DevEJB3NewSFSBCache for the SFSB
> clustering (Paul?), but some changes will be needed for clustering the
> extended persistence context.
>
> The knowledge of the group of SFSBs related to a single SFSB (through
> its XPCs, is available in the JPA subsystem and can be exposed via the
> XPCSerializationController SPI.  If the SPI is wrong, lets correct it.
>
> If we cannot use the SPI for clustering, I'll remove the clustering
> aspects from it, but I'm hoping that won't be the case.
>
>>>> On 10/24/11 9:39 AM, Scott Marlow wrote:
>>>>> Hi,
>>>>>
>>>>> I'm looking into handling serialization of the extended persistence
>>>>> context (for both clustering and EJB3.1 passivation/activation).
>>>>>
>>>>> The (JPA subsystem) spi is still developing for this but if anyone has
>>>>> feedback or wants to follow. A sketch for the spi is at
>>>>> https://github.com/scottmarlow/jboss-as/blob/d7ec51ac14afb47ced7d203f8b3696c10221e9db/jpa/spi/src/main/java/org/jboss/as/jpa/spi/XPCSerializationController.java
>>>>>
>>>>>
>>>>>
>>>>> One question that comes up is why. Why not just throw
>>>>> NotSerializableException instead of serializing the extended
>>>>> persistence
>>>>> context. If anyone feels strongly that we should throw
>>>>> NotSerializableException instead of serializing the extended
>>>>> persistence
>>>>> context, I'd like to hear why.
>>>>>
>>>>> I've made internal changes on
>>>>> https://github.com/scottmarlow/jboss-as/tree/cluster1 to support
>>>>> clustering extended persistence contexts. Next is to do the actual
>>>>> serialization.
>>>>>
>>>>> Scott
>>>>> _______________________________________________
>>>>> jboss-as7-dev mailing list
>>>>> jboss-as7-dev at lists.jboss.org
>>>>> https://lists.jboss.org/mailman/listinfo/jboss-as7-dev
>>>>
>>
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