de.tsl2.nano.collection

Class PersistentCache

java.lang.Object

de.tsl2.nano.collection.PersistentCache

public class PersistentCache
extends Object

application cache to store simple data. uses an own ReferenceMap with weak keys to avoid out-of-memory errors.

Version:

$Revision$

Author:

Thomas Schneider

Method Summary

Modifier and Type	Method and Description
static void	clearCache() clearCache
static PersistentCache	createInstance(String cachePath) createInstance
boolean	deleteCache() deleteCache
Object	get(Object key) get
static PersistentCache	instance() instance (call createInstance(.) once before!)
static boolean	isCreated() isCreated
Object	put(Object key, Object value)
Object	remove(Object key)

Methods inherited from class java.lang.Object

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

Method Detail

instance

public static final PersistentCache instance()

instance (call createInstance(.) once before!)

Returns:

singelton instance

createInstance

public static PersistentCache createInstance(String cachePath)

createInstance

Parameters:

cachePath - path without file name

Returns:

new created instance

isCreated

public static boolean isCreated()

isCreated

Returns:

true, if createInstance(.) was called already.

put

public Object put(Object key,
                  Object value)

remove

public Object remove(Object key)

get

public Object get(Object key)

get

Parameters:

key - key of value

Returns:

cached value

deleteCache

public boolean deleteCache()

deleteCache

Returns:

true, if cache file could be deleted

clearCache

public static void clearCache()

clearCache