com.db4o.internal.caching

Interface Cache4<K,V>

All Superinterfaces:

java.lang.Iterable<V>

All Known Subinterfaces:

PurgeableCache4<K,V>

All Known Implementing Classes:

CacheStatistics, NullCache4

public interface Cache4<K,V>
extends java.lang.Iterable<V>

Method Summary

Methods

Modifier and Type	Method and Description
V	produce(K key, Function4<K,V> producer, Procedure4<V> finalizer) Retrieves the value associated to the key from the cache.

Methods inherited from interface java.lang.Iterable

iterator

Method Detail

produce

V produce(K key,
        Function4<K,V> producer,
        Procedure4<V> finalizer)

Retrieves the value associated to the key from the cache. If the value is not yet cached producer will be called to produce it. If the cache needs to discard a value finalizer will be given a chance to process it.

Parameters:

key - the key for the value - must never change - cannot be null

producer - will be called if value not yet in the cache - can only be null when the value is found in the cache

finalizer - will be called if a page needs to be discarded - can be null

Returns:

the cached value