Cache4 SourceCode GPL - https://github.com/iboxdb/db4o-gpl

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

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	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
forEach, iterator, spliterator

- 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