Package org.apache.activemq.memory

Class LRUMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

java.util.LinkedHashMap<K,V>

org.apache.activemq.memory.LRUMap<K,V>

All Implemented Interfaces:

Serializable, Cloneable, Map<K,V>

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

A simple least-recently-used cache of a fixed size.

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>

Field Summary

Fields

Modifier and Type	Field	Description
protected static final int	DEFAULT_INITIAL_CAPACITY
protected static final float	DEFAULT_LOAD_FACTOR

Constructor Summary

Constructors

Constructor	Description
LRUMap(int maximumSize)
LRUMap(int maximumSize, boolean accessOrder)
LRUMap(int initialCapacity, float loadFactor, boolean accessOrder, int maximumSize)

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

Field Details

DEFAULT_LOAD_FACTOR

protected static final float DEFAULT_LOAD_FACTOR

See Also:

• Constant Field Values

DEFAULT_INITIAL_CAPACITY

protected static final int DEFAULT_INITIAL_CAPACITY

See Also:

• Constant Field Values

Constructor Details

LRUMap

public LRUMap(int maximumSize)

LRUMap

public LRUMap(int maximumSize,
 boolean accessOrder)

LRUMap

public LRUMap(int initialCapacity,
 float loadFactor,
 boolean accessOrder,
 int maximumSize)

Method Details

removeEldestEntry

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

Overrides:

removeEldestEntry in class LinkedHashMap<K,V>