com.caucho.util
Class ClockCache<K,E extends ClockCacheItem>

java.lang.Object
  com.caucho.util.ClockCache<K,E>

public class ClockCache<K,E extends ClockCacheItem>
extends java.lang.Object

Cache with a clock replacement policy.

Null keys are not allowed. LruCache is synchronized.

Constructor Summary

ClockCache(int initialCapacity)
Create the clock cache with a specific capacity.

Method Summary

void	clear() Clears the cache
E	get(K key) Get an item from the cache and make it most recently used.
E	put(K key, E value) Puts a new item in the cache.
ClockCacheItem	remove(K key) Removes an item from the cache
int	size() Returns the current number of entries in the cache.
java.util.Iterator<E>	values() Returns the values in the cache

Methods inherited from class java.lang.Object

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

Constructor Detail

ClockCache

public ClockCache(int initialCapacity)

Create the clock cache with a specific capacity.

Parameters:

initialCapacity - minimum capacity of the cache

Method Detail

size

public int size()

Returns the current number of entries in the cache.

clear

public void clear()

Clears the cache

get

public E get(K key)

Get an item from the cache and make it most recently used.

Parameters:

key - key to lookup the item

Returns:

the matching object in the cache

put

public E put(K key,
             E value)

Puts a new item in the cache. If the cache is full, remove the LRU item.

Parameters:

key - key to store data

value - value to be stored

Returns:

old value stored under the key

remove

public ClockCacheItem remove(K key)

Removes an item from the cache

Parameters:

key - the key to remove

Returns:

the value removed

values

public java.util.Iterator<E> values()

Returns the values in the cache