Package org.apache.groovy.util.concurrent.concurrentlinkedhashmap

## Interface EvictionListener<K,​V>

-     @ThreadSafe
      public interface EvictionListener<K,​V>

  A listener registered for notification when an entry is evicted. An instance may be called concurrently by multiple threads to process entries. An implementation should avoid performing blocking calls or synchronizing on shared resources.

  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`.

  See Also:
    http://code.google.com/p/concurrentlinkedhashmap/

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | `onEviction​(K key, V value)` | A call-back notification that the entry was evicted.

- - ### Method Detail

    - #### onEviction

          void onEviction​(K key,
                          V value)

      A call-back notification that the entry was evicted.
      Parameters:
        `key` - the entry's key
        `value` - the entry's value