org.enhydra.jdbc.util
Class LRUCache

java.lang.Object
  |
  +--org.enhydra.jdbc.util.LRUCache

Direct Known Subclasses:

PreparedStatementCache

public class LRUCache

extends java.lang.Object

Simple implementation of a cache, using Least Recently Used algorithm for discarding members when the cache fills up

Constructor Summary

LRUCache(int maxSize)
Constructor

Method Summary

protected void	cleanupObject(java.lang.Object o) Override this method to do special cleanup on an object, such as closing a statement or a connection
java.lang.Object	get(java.lang.Object key) Gets an object from the cache.
void	put(java.lang.Object key, java.lang.Object value) Puts a new object in the cache.
java.lang.Object	remove(java.lang.Object key) Removes the object from the cache and the lru list
void	resize(int newSize) Resize the cache

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LRUCache

public LRUCache(int maxSize)

Constructor

Method Detail

put

public void put(java.lang.Object key,
                java.lang.Object value)

Puts a new object in the cache. If the cache is full, it removes the least recently used object. The new object becomes the most recently used object.

get

public java.lang.Object get(java.lang.Object key)

Gets an object from the cache. This object is set to be the most recenty used

remove

public java.lang.Object remove(java.lang.Object key)

Removes the object from the cache and the lru list

resize

public void resize(int newSize)

Resize the cache

cleanupObject

protected void cleanupObject(java.lang.Object o)

Override this method to do special cleanup on an object, such as closing a statement or a connection