[infinispan-dev] HotRod near caches

Hi people, this is a bit of a dump of ideas for getting our HotRod client in shape for supporting near caches: - RemoteCaches should have an optional internal cache. This cache should probably be some form of bounded expiration-aware hashmap which would serve as a local copy of data retrieved over the wire. In the past we have advocated the use of combining an EmbeddedCacheManager with a RemoteCacheStore to achieve this, but this is only applicable to Java clients, while we need to think of a solution for our other clients too. - Once remote listeners are in place, a RemoteCache would automatically invalidate entries in the near-cache. - Remote Query should "pass-through" the near-cache, so that entries retrieved from a query would essentially be cached locally following the same semantics. This can be achieved by having the QUERY verb return just the set of matching keys instead of the whole entries - Optionally we can even think about a query cache which would hash the query DSL and store the resulting keys locally so that successive invocations of a cached query wouldn't go through the wire. Matching this with invalidation is probably a tad more complex, and I'd probably avoid going down that path. Tristan