[infinispan-dev] Entry grouping feature

Hi there, I am in process of reviewing Infinispan as, among other things, a replacement of OSCache library we currently use. So far, it looks very promising project - well done, guys! Anyway, one of the features we heavily rely on seems to be missing. The feature is called "grouping", allowing to "bind" multiple components and possibly flush them even without knowing of their keys. E.g.: Cache cache = ....; cache.put("key1", "value1", "groupX"); cache.put("key2", "value2", "groupX"); cache.flushGroup("groupX"); // this would evict both key1 and key2 as they belong to groupX For more details, you can have a look at [1]. I've looked at the Infinispan's roadmap/JIRA, but couldn't find a single trace of this feature mentioned anywhere. My question is, how hard would be to implement this feature without having much knowledge of Infinispan internals? I've spoken to Manik Surtani at Devoxx'09 and he guessed this could be done by using interceptors. I've had a sneak peek at the interceptors package, but obviously this is still pretty low level stuff, and apart from javadocs, documentation resources are rather scarce. Chances are, I could get some time assigned to implement this feature myself and contribute the code back to the community, but before doing anything I'd like to know how feasible is this in general. For example, what would be the best way to fit these parameters in the current API? How would this work cluster-wise? Any ideas are appreciated. Thanks in advance! Regards, Mindaugas [1] http://www.opensymphony.com/oscache/api/com/opensymphony/oscache/base/Cac...