Package org.aksw.commons.cache.plain

Class ClaimingCacheOld<K,V>

java.lang.Object

org.aksw.commons.cache.plain.ClaimingCacheOld<K,V>

Type Parameters:

K -

V -

public class ClaimingCacheOld<K,V>
extends Object

An extension of loading cache that allows for making explicit references to cached entries such that they won't be evicted. Uses 'smart' references. The cache: Upon load, the cache first checks whether for the key there is already a claimed reference. Upon load it references its own item, and releases this reference upon removal. Claiming: Claiming an item acquires an additional reference and adds that reference to the claimed map. When a claimed item is no longer referenced, the item is put back to cache.

Author:

raven

Field Summary

Fields

Modifier and Type	Field	Description
protected com.google.common.cache.LoadingCache<K,Ref<V>>	cache
protected Map<K,Ref<Ref<V>>>	claimed

Constructor Summary

Constructors

Constructor	Description
ClaimingCacheOld(com.google.common.cache.CacheBuilder<Object,Object> cacheBuilder, Function<K,Ref<V>> cacheLoader, com.google.common.cache.RemovalListener<K,Ref<V>> removalListener)

Method Summary

Modifier and Type	Method	Description
Ref<V>	claim(K key)	Claim a reference to the key's entry.
Ref<V>	claimIfPresent(K key)	Cannot raise an ExecutionException because it does not trigger loading
Ref<V>	claimUnsafe(K key)
static <K, V> ClaimingCacheOld<K,V>	create(com.google.common.cache.CacheBuilder<Object,Object> cacheBuilder, Function<K,Ref<V>> cacheLoader, com.google.common.cache.RemovalListener<K,Ref<V>> removalListener)
void	invalidateAll()
<V> Ref<V>	link(Ref<? extends Ref<V>> refToRef)

Methods inherited from class java.lang.Object

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

Field Details

cache

protected com.google.common.cache.LoadingCache<K,Ref<V>> cache

claimed

protected Map<K,Ref<Ref<V>>> claimed

Constructor Details

ClaimingCacheOld

public ClaimingCacheOld(com.google.common.cache.CacheBuilder<Object,Object> cacheBuilder,
 Function<K,Ref<V>> cacheLoader,
 com.google.common.cache.RemovalListener<K,Ref<V>> removalListener)

Method Details

create

public static <K,
V> ClaimingCacheOld<K,V> create(com.google.common.cache.CacheBuilder<Object,Object> cacheBuilder,
 Function<K,Ref<V>> cacheLoader,
 com.google.common.cache.RemovalListener<K,Ref<V>> removalListener)

link

public <V> Ref<V> link(Ref<? extends Ref<V>> refToRef)

claimUnsafe

public Ref<V> claimUnsafe(K key)

claim

public Ref<V> claim(K key)
             throws ExecutionException

Claim a reference to the key's entry.

Parameters:

key -

Returns:

Throws:

ExecutionException

claimIfPresent

public Ref<V> claimIfPresent(K key)

Cannot raise an ExecutionException because it does not trigger loading

invalidateAll

public void invalidateAll()