Class ConcurrentCache<K,V>

java.lang.Object

org.eclipse.rdf4j.sail.lmdb.ConcurrentCache<K,V>

public class ConcurrentCache<K,V>
extends Object

Fixed-size concurrent cache with approximate FIFO eviction per hash set. The cache never grows beyond its slot budget; capacity is rounded up to a power-of-two number of slots and entries are evicted in O(1).

Field Summary

Fields

Modifier and Type	Field	Description
protected final ConcurrentHashMap<K,V>	cache

Constructor Summary

Constructors

Constructor	Description
ConcurrentCache(int capacity)

Method Summary

Modifier and Type	Method	Description
protected void	cleanUp()
void	clear()
V	get(Object key)
protected boolean	onEntryRemoval(K key)
V	put(K key, V value)

Methods inherited from class Object

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

Field Details

cache

protected final ConcurrentHashMap<K,V> cache

Constructor Details

ConcurrentCache

public ConcurrentCache(int capacity)

Method Details

get

public V get(Object key)

put

public V put(K key,
 V value)

clear

public void clear()

onEntryRemoval

protected boolean onEntryRemoval(K key)

Parameters:

key - the key of the node to test for removal and do finalization on

Returns:

true if removal is approved

cleanUp

protected void cleanUp()