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

java.lang.Object
  extended by java.util.AbstractMap<K,V>
      extended by java.util.HashMap<K,V>
          extended by java.util.LinkedHashMap<K,V>
              extended by 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
protected static int DEFAULT_INITIAL_CAPACITY
           
protected static float DEFAULT_LOAD_FACTOR
           
 
Constructor Summary
LRUMap(int maximumSize)
           
LRUMap(int maximumSize, boolean accessOrder)
           
LRUMap(int initialCapacity, float loadFactor, boolean accessOrder, int maximumSize)
           
 
Method Summary
protected  boolean removeEldestEntry(Map.Entry<K,V> eldest)
           
 
Methods inherited from class java.util.LinkedHashMap
clear, containsValue, get
 
Methods inherited from class java.util.HashMap
clone, containsKey, entrySet, isEmpty, keySet, put, putAll, remove, size, values
 
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
containsKey, entrySet, equals, hashCode, isEmpty, keySet, put, putAll, remove, size, values
 

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>


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