Re: [infinispan-dev] New events to reflect topology change Was: https://issues.jboss.org/browse/ISPN-977

So this is related to ISPN-360 which is currently titled "create NodeJoinedEvent". Leaving names out for now, essentially, what we need is a notification to inform listeners that (a) a JGroups ViewChange has been detected (b) a rehash has started and (c) a rehash has completed. Possibly, being more fine-grained, that (d) a new ConsistentHash view has been installed. Does this cover it all? If so, how about: @ViewChanged (same as we have now) @RehashStarted @RehashComplete @TopologyChanged // to reflect a new CH? Thoughts?

Cheers Manik On 11 May 2011, at 13:29, Sanne Grinovero wrote: > First thing I thought when reading your email was "OMG do we support > on-the-fly hash implementation changes? crazy!" > > That's obviously not the case, but if you name it as > @ConsistenHashChangeListene that's what I would think. > > Wouldn't it be better to change the exact timing of the viewchange > event? I don't see why Infinispan users might be more interested in > knowing about the topology details according to the transport than > what they are about the actual Infinispan hashing topology - I would > expect that when I receive which notification the new view is already > installed and ready to go; actually I thought that was the case since > ever. > > What would be the use cases to get the notification *before* the new > hash is installed? > > Cheers, > Sanne > > 2011/5/11 Mircea Markus <mircea.markus(a)jboss.com&gt;: >> Hi, >> The basic problem behind this is that I need to be notified when a new >> consistent hash is installed. >> >> ATM there isn't any support (of which I know) for a >> "@ConsistenHashChangeListener". >> >> I'm thinking to add such notifications either: >> a) internally: Observer pattern on DistributionManager or even on >> DistributionManagerImpl >> b) more generically, as a fully flagged listener. >> >> I favor a) and then if more people ask for it we will expose it as a fully >> flagged listener. >> >> Suggestions? >> >> Cheers, >> Mircea >> >> _______________________________________________ >> infinispan-dev mailing list >> infinispan-dev(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/infinispan-dev >> > > _______________________________________________ > infinispan-dev mailing list > infinispan-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/infinispan-dev -- Manik Surtani manik(a)jboss.org twitter.com/maniksurtani Lead, Infinispan http://www.infinispan.org _______________________________________________ infinispan-dev mailing list infinispan-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/infinispan-dev