br.com.caelum.vraptor.cache

Interface CacheStore<K,V>

Type Parameters:

K - type of the cache key

V - type of the cache value

All Known Implementing Classes:

DefaultCacheStore, LRUCacheStore

public interface CacheStore<K,V>

Since:

4.0.0

Author:

Lucas Cavalcanti, Alberto Souza

Method Summary

Modifier and Type	Method and Description
V	fetch(K key) Fetches the value under the key
V	fetch(K key, Callable<V> valueProvider) Fetches the value under the key.
V	write(K key, V value) Writes a value on the cache

Method Detail

write

V write(K key,
        V value)

Writes a value on the cache

Parameters:

key -

value -

Returns:

the previous stored value, null if none.

fetch

V fetch(K key)

Fetches the value under the key

Parameters:

key -

Returns:

the stored value for the key, or null.

fetch

V fetch(K key,
        Callable<V> valueProvider)

Fetches the value under the key. If no value is set, valueProvider is used to compute a value for the key. Once the value is computed, it is stored on the cache.

Parameters:

key -

valueProvider -

Returns:

the stored or the new value for the provided key.