Package org.jppf.utils.collections

Class LRUMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

java.util.LinkedHashMap<K,V>

org.jppf.utils.collections.LRUMap<K,V>

Type Parameters:

K - the type fo the keys.

V - the type fo the values.

All Implemented Interfaces:

Serializable, Cloneable, Map<K,V>

public class LRUMap<K,V>
extends LinkedHashMap<K,V>

A cache with an LRU eviction policy.

Author:

Laurent Cohen

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
LRUMap()	Initialize this cache with a default max capacity of 1024.
LRUMap(int maxCapacity)	Initialize this cache with the specified max capacity.

Method Summary

Modifier and Type	Method	Description
protected boolean	removeEldestEntry(Map.Entry<K,V> eldest)

Methods inherited from class java.util.LinkedHashMap

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

Methods inherited from class java.util.HashMap

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

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

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, put, putAll, putIfAbsent, remove, remove, replace, replace, size

Constructor Details

LRUMap

public LRUMap()

Initialize this cache with a default max capacity of 1024.

LRUMap

public LRUMap(int maxCapacity)

Initialize this cache with the specified max capacity.

Parameters:

maxCapacity - the maximum capacity of this cache.

Method Details

removeEldestEntry

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

Overrides:

removeEldestEntry in class LinkedHashMap<K,V>