iitb.con.caching
Class LRUCache<K>

java.lang.Object
  iitb.con.caching.LRUCache<K>

All Implemented Interfaces:

Cache<K>

public class LRUCache<K>
extends java.lang.Object
implements Cache<K>

LRU cache. The least recently used objects are replaced when the cache is full.

Field Summary

int	MAX_ENTRIES Maximum entries in the cache

Constructor Summary

LRUCache()

LRUCache(int maxEntries)

Method Summary

void	clear() Clears the cache
long	freeSpace() Returns the available free space
CacheObject	get(K key) Returns the cached object for the given key
long	getSize() Returns the size of cache in bytes
boolean	put(K key, CacheObject object) Places the cache object in the cache using the key

Methods inherited from class java.lang.Object

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

Field Detail

MAX_ENTRIES

public int MAX_ENTRIES

Maximum entries in the cache

Constructor Detail

LRUCache

public LRUCache()

LRUCache

public LRUCache(int maxEntries)

Method Detail

clear

public void clear()

Clears the cache

Specified by:

clear in interface Cache<K>

freeSpace

public long freeSpace()

Returns the available free space

Specified by:

freeSpace in interface Cache<K>

Returns:

cache free space

get

public CacheObject get(K key)

Returns the cached object for the given key

Specified by:

get in interface Cache<K>

Parameters:

key - key used to retrieve the object

Returns:

cached object if present, else returns NULL

See Also:

CacheObject

getSize

public long getSize()

Returns the size of cache in bytes

Specified by:

getSize in interface Cache<K>

Returns:

cache size as long

put

public boolean put(K key,
                   CacheObject object)

Places the cache object in the cache using the key

Specified by:

put in interface Cache<K>

Parameters:

key - key used to place the object

object - cache object

Returns:

true on success

See Also:

CacheObject