JGroups can be used as the underlying mechanism for the replication operations in ehcache. JGroups offers a very flexible protocol stack, reliable unicast and multicast message transmission.

On the down side JGroups can be complex to configure and some protocol stacks have dependencies on others.

To set up replicated caching using JGroups you need to configure a PeerProviderFactory of type JGroupsCacheManagerPeerProviderFactory which is done globally for a CacheManager

For each cache that will be replicated, you then need to add a cacheEventListenerFactory of type JGroupsCacheReplicatorFactory to propagate messages.