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

[Scott Marlow]

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
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>>>
>>>
>>
>
>