org.enhydra.jdbc.util

Class LRUCache

java.lang.Object

org.enhydra.jdbc.util.LRUCache

Direct Known Subclasses:

PreparedStatementCache

public class LRUCache
extends Object

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

Field Summary

Fields

Modifier and Type	Field and Description
Logger	log

Constructor Summary

Constructors

Constructor and Description
LRUCache(int maxSize) Constructor

Method Summary

Modifier and Type	Method and Description
int	cacheSize()
void	cleanupAll()
protected void	cleanupObject(Object o) Override this method to do special cleanup on an object, such as closing a statement or a connection
Object	get(Object key) Gets an object from the cache.
int	LRUSize()
void	put(Object key, Object value) Puts a new object in the cache.
Object	remove(Object key) Removes the object from the cache and the lru list
void	resize(int newSize) Resize the cache
void	setLogger(Logger alog)

Methods inherited from class java.lang.Object

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

Field Detail

log

public Logger log

Constructor Detail

LRUCache

public LRUCache(int maxSize)

Constructor

Method Detail

LRUSize

public int LRUSize()

cacheSize

public int cacheSize()

put

public void put(Object key,
                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 Object get(Object key)

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

remove

public Object remove(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(Object o)

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

cleanupAll

public void cleanupAll()

setLogger

public void setLogger(Logger alog)