Package org.apache.jackrabbit.oak.index.indexer.document.tree.store.utils

Class ConcurrentLRUCache<K,V extends MemoryObject>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

java.util.LinkedHashMap<K,V>

org.apache.jackrabbit.oak.index.indexer.document.tree.store.utils.ConcurrentLRUCache<K,V>

Type Parameters:

K - the key type

V - the value type

All Implemented Interfaces:

Serializable, Cloneable, Map<K,V>

public class ConcurrentLRUCache<K,V extends MemoryObject>
extends LinkedHashMap<K,V>

A synchronized LRU cache. The cache size is limited by the amount of memory (and not number of entries).

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K extends Object,V extends Object>, AbstractMap.SimpleImmutableEntry<K extends Object,V extends Object>

Constructor Summary

Constructors

Constructor	Description
ConcurrentLRUCache(long maxMemoryBytes)

Method Summary

Modifier and Type	Method	Description
void	clear()
void	entryWasRemoved(K key, V value)
V	get(Object key)
Set<K>	keys()
V	put(K key, V value)
void	putAll(Map<? extends K,? extends V> map)
V	remove(Object key)
boolean	removeEldestEntry(Map.Entry<K,V> eldest)
void	setSize(int maxMemoryBytes)
String	toString()

Methods inherited from class java.util.LinkedHashMap

containsValue, entrySet, forEach, getOrDefault, keySet, replaceAll, values

Methods inherited from class java.util.HashMap

clone, compute, computeIfAbsent, computeIfPresent, containsKey, isEmpty, merge, putIfAbsent, remove, replace, replace, size

Methods inherited from class java.util.AbstractMap

equals, hashCode

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, containsKey, equals, hashCode, isEmpty, merge, putIfAbsent, remove, replace, replace, size

Constructor Detail

ConcurrentLRUCache

public ConcurrentLRUCache(long maxMemoryBytes)

Method Detail

toString

public String toString()

Overrides:

toString in class AbstractMap<K,V extends MemoryObject>

setSize

public void setSize(int maxMemoryBytes)

get

public V get(Object key)

Specified by:

get in interface Map<K,V extends MemoryObject>

Overrides:

get in class LinkedHashMap<K,V extends MemoryObject>

keys

public Set<K> keys()

put

public V put(K key,
             V value)

Specified by:

put in interface Map<K,V extends MemoryObject>

Overrides:

put in class HashMap<K,V extends MemoryObject>

putAll

public void putAll(Map<? extends K,? extends V> map)

Specified by:

putAll in interface Map<K,V extends MemoryObject>

Overrides:

putAll in class HashMap<K,V extends MemoryObject>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V extends MemoryObject>

Overrides:

remove in class HashMap<K,V extends MemoryObject>

clear

public void clear()

Specified by:

clear in interface Map<K,V extends MemoryObject>

Overrides:

clear in class LinkedHashMap<K,V extends MemoryObject>

entryWasRemoved

public void entryWasRemoved(K key,
                            V value)

removeEldestEntry

public boolean removeEldestEntry(Map.Entry<K,V> eldest)

Overrides:

removeEldestEntry in class LinkedHashMap<K,V extends MemoryObject>