Package org.apache.jackrabbit.oak.commons.cache

Class Cache<K,V extends Cache.Value>

java.lang.Object

org.apache.jackrabbit.oak.commons.cache.Cache<K,V>

public class Cache<K,V extends Cache.Value>
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	Cache.Backend<K,V>	A cache backend that can load objects from persistent storage.
static interface	Cache.Value	A cacheable object.

Method Summary

Modifier and Type	Method	Description
void	clear()
V	get(K key)
int	getMemoryMax()
int	getMemoryUsed()
static <K, V extends Cache.Value> Cache<K,V>	newInstance(Cache.Backend<K,V> backend, int maxMemoryBytes)
void	put(K key, V value)
V	replace(K key, V value)	Get the element in the cache if one exists, or add it to the cache if not.
int	size()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

put

public void put(K key,
 V value)

replace

public V replace(K key,
 V value)

Get the element in the cache if one exists, or add it to the cache if not.

Parameters:

key - the key

value - the value

Returns:

the cached element

get

public V get(K key)

newInstance

public static <K,
V extends Cache.Value> Cache<K,V> newInstance(Cache.Backend<K,V> backend,
 int maxMemoryBytes)

clear

public void clear()

size

public int size()

getMemoryUsed

public int getMemoryUsed()

getMemoryMax

public int getMemoryMax()