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,V>, AbstractMap.SimpleImmutableEntry<K,V>

Field Summary

Fields

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

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and 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 Detail

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 Detail

LRUMap

public LRUMap(int maximumSize)

LRUMap

public LRUMap(int maximumSize,
              boolean accessOrder)

LRUMap

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

Method Detail

removeEldestEntry

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

Overrides:

removeEldestEntry in class LinkedHashMap<K,V>