@ThreadSafe
public interface EvictionListener<K,V>
 The listener is invoked by ConcurrentLinkedHashMap on a caller's
 thread and will not block other threads from operating on the map. An
 implementation should be aware that the caller's thread will not expect
 long execution times or failures as a side effect of the listener being
 notified. Execution safety and a fast turn around time can be achieved by
 performing the operation asynchronously, such as by submitting a task to an
 ExecutorService.
| Modifier and Type | Method and Description | 
|---|---|
| void | onEviction(K key,
          V value)A call-back notification that the entry was evicted. |