[jbosscache-dev] JBCACHE-471 - Handling JGroups MERGE

[Manik Surtani]

This was on 2.2.0's task list:

	http://jira.jboss.com/jira/browse/JBCACHE-471

The last time we spoke about this was in Neuchatel, and we decided  
we'd expose an interface, a MergeHandler, that people could  
implement.  We'd also provide a few standard implementations, like  
EvictEntireClusterStateHandler and FatalStopMergeHandler?  I think a  
SingleWinnerHandler  and DisjointedSubtreeMergeHandler can come later,  
as they would both involve a proxying mechanism to talk to remote  
caches being in place - something which will be developed as a part of  
Partitioning [1].

We didn't discuss the design of this interface - how about a single  
callback with:

public interface MergeHandler
{
	void handleMerge(Cache currentInstance, List<Address>  
winningSubPartition, List<Address> losingSubPartition);
}

Can we see any other information being needed?

[1] http://jira.jboss.org/jira/browse/JBCACHE-60

--
Manik Surtani
Lead, JBoss Cache
manik at jboss.org