[infinispan-dev] support for XA CacheStores in 6.0

Hi, This is the continuation of a conversation Tristan, Dan and myself started around adding support for XA cache stores in Infinispan 6.0. It is also related to the CacheStore API refactoring scheduled for 6.0 [1]. The problem: When configuring an XA cache with a cache store it is possible for the cache store to end up out of sync with in-memory data. In order to overcome that we would need cache store enhancements. Whilst this is definitely a limitation and a nice to have feature not sure that 6.0 is the time and place to start this enhancement. Why? There doesn't seem to be any explicit demand from the community/JDG for this feature at the moment, so other features should take priority. There's also a potential workaround for this: don't configure a cache store but the user to manage the XA write in the store directly. Wdyt? I've also updated the documentation to clearly state that inconsistencies are possible[2]. Cheers, Mircea [1] https://community.jboss.org/wiki/CacheLoaderAndCacheStoreSPIRedesign [2] https://docs.jboss.org/author/display/ISPN/CacheLoaders#CacheLoaders-Cach...