[infinispan-dev] Too late for an 5.0 API change?

Hi all, What do people think of changing the addListener() APIs to be more fluent? We could either: 1. Change Listenable to be Listenable<T> and then have: <T> addListener(Object listener); So, implementers such as EmbeddedCacheManager would implement Listenable<EmbeddedCacheManager> and so would implement: EmbeddedCacheManager addListener(Object listener); 2. Or, more simply, have Listenable define: Object addListener(Object listener); and EmbeddedCacheManager using covariants to implement: EmbeddedCacheManager addListener(Object listener); Btw, the same would apply to removeListener. Thoughts? -- Galder Zamarreño Sr. Software Engineer Infinispan, JBoss Cache