How to be notified of clients coming and leaving the distributed data-grid?

[cchene]

Hello,

I am evaluating Infinispan as a distributed data-grid. Everything seems OK, except I would like to be notified each time a new client comes up or leaves (accidentally or voluntarily).

Does anybody know how this can be achieved?

I could not find any Infinispan listener for this kind of events. I know this is not at the heart of Infinsipan's business, but that would be nice

JGroups has a MembershipListener that looks like what I want, but I'm not sure how I can safely retrieve the JChannel instance (as it is lazily instantiated) and adding my listener without troubling Infinispan...

Any idea would be much appreciated!

Thanks,

Cyril

[rvansa]

If you want to know about JGroups members of the cluster, you have to go down to the JChannel the dirty way and register it there.

In Infinispan, you can register listeners for @DataRehashed and @TopologyChange in the same way as regular cache event listeners (cache.getAdvancedCache().addListener(...)). On DataRehashedEvent you can use getMembersAtStart() and getMembersAtEnd(), on TopologyChangeEvent you need to use getConsistentHashAtStart/End().getMembers().

[nadirx]

We have ViewChanged

https://docs.jboss.org/infinispan/8.0/apidocs/org/infinispan/notifications/cachemanagerlistener/annotation/ViewChanged.html which is you can attach to a Cache Manager

[cchene]

Thanks!

Sorry I didn't see that...

My first test shows that I receive the ViewChangeEvent when a member comes in, not when it leaves.

But that may be because of the way I leave the cluster...

I'll have a look at it as soon as possible.

Thanks again