[infinispan-dev] Proposed ISPN 7 compilation incompatibilities with ISPN 6

Recently while working on some ISPN 7 features, there were some public API inconsistencies. I wanted to bring these up just in case if someone had concerns. The first few are pretty trivial, but can cause compilation errors between versions if user code implements these interfaces and defines types. 1. The CacheWriter interface currently defines a delete(K key) method. To be more inline with JCache and java.util.collections interfaces I was hoping to change this to be delete(Object key) instead. 2. The CacheLoader interface currently defines load(K key) and contains(K key) methods. Similar to above I was hoping to change the K type to be Object to be more inline with JCache and java.util.collections interfaces. This last one is a bit more major, but currently we have 2 classes that are named KeyFilter. One that resides in the org.infinispan.notifications package and another that resides in the org.infinispan.persistence.spi.AdvancedCacheLoader interface. 3. My plan is instead to consolidate these classes into 1 into a new core org.infinispan.filter package. I would also move the new KeyValueFilter class that was added for cluster listeners into this package and their accompanying implementations. The first 2 is currently implemented as changes in https://github.com/infinispan/infinispan/pull/2423. The latter I was going to add into changes for https://issues.jboss.org/browse/ISPN-4068. Let me know what you guys think. - Will