MapEvictionListener (Guava: Google Core Libraries for Java

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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
`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