org.iq80.leveldb.util

Interface ILRUCache<K,V>

All Known Implementing Classes:

LRUCache

public interface ILRUCache<K,V>

Method Summary

Modifier and Type	Method and Description
long	getApproximateMemoryUsage()
V	getIfPresent(K key) Get a value from cache if present (already loaded)
void	invalidateAll() Discards all entries in the cache.
V	load(K key, Callable<V> loader) Get cached valued by key or load and cache loaded value.

Method Detail

load

V load(K key,
       Callable<V> loader)
throws ExecutionException

Get cached valued by key or load and cache loaded value.

Parameters:

key - cache key

loader - key value loader

Returns:

loaded/saved value

Throws:

ExecutionException - if load has any exception.

getApproximateMemoryUsage

long getApproximateMemoryUsage()

getIfPresent

V getIfPresent(K key)

Get a value from cache if present (already loaded)

Parameters:

key - cache key

Returns:

value if present, otherwise

invalidateAll

void invalidateAll()

Discards all entries in the cache.