One way is probably using JBossCache where it has a TreeCacheListener that you can subscribe.
I think JBossCache might be too big for my needs here. The POJO should be thrown away after all other clustermembers have recognized it.
Is it possible to find out the Partitionname of the jboss instance where my service-instance is running?
I think in my case I have to implement my own trigger mechanism with JGroups.
Any better Ideas?