All cache concurrency strategies, except for READ_WRITE, use the StandardCacheEntryImpl object type for storing a second-level cache entry value. This class has a toString() representation, which makes it easy to grasp the entity disassembled state.

For READ_WRITE, the AbstractReadWriteAccessStrategy.Item object is used, which doesn't have a toString() representation.

For the design to be consistent, it would be good to implement toString() for AbstractReadWriteAccessStrategy.Item too.