org.apache.activemq.util
Class LRUCache<K,V>
java.lang.Object
java.util.AbstractMap<K,V>
java.util.HashMap<K,V>
java.util.LinkedHashMap<K,V>
org.apache.activemq.util.LRUCache<K,V>
- Type Parameters:
K
- V
-
- All Implemented Interfaces:
- Serializable, Cloneable, Map<K,V>
public class LRUCache<K,V>
- extends LinkedHashMap<K,V>
A Simple LRU Cache
- Version:
- $Revision$
- See Also:
- Serialized Form
Constructor Summary |
LRUCache()
Default constructor for an LRU Cache The default capacity is 10000 |
LRUCache(int maximumCacheSize)
Constructs a LRUCache with a maximum capacity |
LRUCache(int initialCapacity,
int maximumCacheSize,
float loadFactor,
boolean accessOrder)
Constructs an empty LRUCache instance with the specified
initial capacity, maximumCacheSize,load factor and ordering mode. |
Methods inherited from interface java.util.Map |
containsKey, entrySet, equals, hashCode, isEmpty, keySet, put, putAll, remove, size, values |
maxCacheSize
protected int maxCacheSize
LRUCache
public LRUCache()
- Default constructor for an LRU Cache The default capacity is 10000
LRUCache
public LRUCache(int maximumCacheSize)
- Constructs a LRUCache with a maximum capacity
- Parameters:
maximumCacheSize
-
LRUCache
public LRUCache(int initialCapacity,
int maximumCacheSize,
float loadFactor,
boolean accessOrder)
- Constructs an empty LRUCache instance with the specified
initial capacity, maximumCacheSize,load factor and ordering mode.
- Parameters:
initialCapacity
- the initial capacity.maximumCacheSize
- loadFactor
- the load factor.accessOrder
- the ordering mode - true for access-order,
false for insertion-order.
- Throws:
IllegalArgumentException
- if the initial capacity is negative or
the load factor is non-positive.
getMaxCacheSize
public int getMaxCacheSize()
- Returns:
- Returns the maxCacheSize.
setMaxCacheSize
public void setMaxCacheSize(int maxCacheSize)
- Parameters:
maxCacheSize
- The maxCacheSize to set.
removeEldestEntry
protected boolean removeEldestEntry(Map.Entry<K,V> eldest)
- Overrides:
removeEldestEntry
in class LinkedHashMap<K,V>
Copyright © 2005-2011 Apache Software Foundation. All Rights Reserved.