com.google.common.collect

Interface MapEvictionListener<K,V>

Type Parameters:

K - the type of keys being evicted

V - the type of values being evicted

@Beta
public interface MapEvictionListener<K,V>

An object that can receive a notification when an entry is evicted from a map.

An instance may be called concurrently by multiple threads to process different entries. Implementations of this interface should avoid performing blocking calls or synchronizing on shared resources.

Since:

7

Author:

Ben Manes

Method Summary

Methods

Modifier and Type	Method and Description
void	onEviction(K key, V value) Notifies the listener that an eviction has occurred.

Method Detail

onEviction

void onEviction(@Nullable
              K key,
              @Nullable
              V value)

Notifies the listener that an eviction has occurred. Eviction may be for reasons such as timed expiration, exceeding a maximum size, or due to garbage collection. Eviction notification does not occur due to manual removal.

Parameters:

key - the key of the entry that has already been evicted, or null if its reference was collected

value - the value of the entry that has already been evicted, or null if its reference was collected