local.tomas.util.cache
Interface CacheBackend<K,V>

Type Parameters:

K - type of object key

V - type of cache objects

public interface CacheBackend<K,V>

Interface for cache backends.

Author:

tomas.teubner

Method Summary

V	create(K key, Date d) Create new object in backend.
CacheItem<K,V>	get(K key) Get cache item from backend.
Iterator<CacheItem<K,V>>	load() Get iterator over saved items.
void	put(K key, V value, Date d) Save cache item in backend.
void	remove(K key) Remove object from backend.
void	unload(K key, Date d)

Method Detail

get

CacheItem<K,V> get(K key)
                   throws CacheException

Get cache item from backend.

Parameters:

key - object key

Returns:

cache item

Throws:

CacheException - on backend exceptions

put

void put(K key,
         V value,
         Date d)
         throws CacheException

Save cache item in backend.

Parameters:

key - object key

value - object

d - date of last access

Throws:

CacheException - on backend exceptions

create

V create(K key,
         Date d)
         throws CacheException

Create new object in backend.

Parameters:

key - object key

d - date of last access

Returns:

new object

Throws:

CacheException - on backend exceptions

remove

void remove(K key)
            throws CacheException

Remove object from backend.

Parameters:

key - object key

Throws:

CacheException - on backend exceptions

load

Iterator<CacheItem<K,V>> load()
                              throws CacheException

Get iterator over saved items.

Returns:

iterator over saved cache items

Throws:

CacheException - on backen exceptions

unload

void unload(K key,
            Date d)
            throws CacheException

Throws:

CacheException