|Configuring the Native Client Cache / Region Entries|
Invalidating an entry sets the entry's value to NULL. Destroying it removes the entry from the region altogether. These operations can be carried out in the local cache in the following ways:
Whether carried out explicitly or through expiration activities, invalidation and destruction cause event notification: The CacheEvent object has an isExpiration flag that is set to true for events resulting from expiration activities, and set to false for all other events.