org.apache.camel.util
Class LRUCache<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.camel.util.LRUCache<K,V>
All Implemented Interfaces:
Serializable, Cloneable, Map<K,V>, Service
Direct Known Subclasses:
EndpointRegistry

public class LRUCache<K,V>
extends LinkedHashMap<K,V>
implements Service

A Least Recently Used Cache

Version:
$Revision: 18094 $
See Also:
Serialized Form

Constructor Summary
LRUCache(int maximumCacheSize)
           
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.
 
Method Summary
 int getMaxCacheSize()
          Returns the maxCacheSize.
protected  boolean removeEldestEntry(Map.Entry<K,V> entry)
           
 void start()
          Starts the service
 void stop()
          Stops the service
 
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
 

Constructor Detail

LRUCache

public LRUCache(int 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 - the max capacity.
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.
Method Detail

getMaxCacheSize

public int getMaxCacheSize()
Returns the maxCacheSize.


removeEldestEntry

protected boolean removeEldestEntry(Map.Entry<K,V> entry)
Overrides:
removeEldestEntry in class LinkedHashMap<K,V>

start

public void start()
           throws Exception
Description copied from interface: Service
Starts the service

Specified by:
start in interface Service
Throws:
Exception - is thrown if starting failed

stop

public void stop()
          throws Exception
Description copied from interface: Service
Stops the service

Specified by:
stop in interface Service
Throws:
Exception - is thrown if stopping failed


Apache CAMEL