[infinispan-dev] Merged and MergeEvent in 4.2
Vladimir Blagojevic
vblagoje at redhat.com
Mon Oct 25 10:17:46 EDT 2010
I think this should already be fine. I took a liberty of concluding that there was a small oversight in completion of ISPN-609 and I completed it. Please verify.
On 2010-10-25, at 7:46 AM, Manik Surtani wrote:
> Yes, both types of notifications should be emitted. I'll take a look at this today. Reopening ISPN-609.
>
> On 11 Oct 2010, at 20:42, Mircea Markus wrote:
>
>>
>> On 11 Oct 2010, at 20:37, Vladimir Blagojevic wrote:
>>
>>>
>>> On 2010-10-11, at 1:22 PM, Mircea Markus wrote:
>>>
>>>>
>>>> On 11 Oct 2010, at 18:12, Vladimir Blagojevic wrote:
>>>>
>>>>> Hey,
>>>>>
>>>>> No need to register a new listener for merge event. There is no addMergeEventListener, only addListener! Manik's mechanism looks for annotated callback methods in a listener and registers them with event notifiers. So when you do addListener(x) and x has methods annotated with ViewChaged and Merged annotations then x will get registered in appropriate list in CacheManagerNotifierImpl. Very ingenious mechanism.
>>>>>
>>>>> Yes, I made MergeEvent subclass of ViewChangeEvent. It was not before. To all our view change listener classes that had ViewChange annotated method callback I added Merged as well.
>>>> I see! My question is: if a cluster merge happens, and I have a method annotated with ViewChange *only* (i.e. doesn't have @Merged) - will the @ViewChange annotated method be called? IMO it should because merge is only a special kind of view change.
>>>
>>> Aha, I see :) It will not get called! The root cause is split of view notification in JGroups transport! We have to make this clear for 4.2 release!
>> That's my point :) I think it should be called as merge is a particular type of view change (the view literally changes)
>>>
>>> Vladimir
>>>
>>>
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> --
> Manik Surtani
> manik at jboss.org
> Lead, Infinispan
> Lead, JBoss Cache
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Vladimir Blagojevic
JBoss Clustering Team
JBoss, by Red Hat
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