Package com.github.benmanes.caffeine.guava

Class CaffeinatedGuavaLoadingCache.SingleLoader<K,V>

java.lang.Object

com.github.benmanes.caffeine.guava.CaffeinatedGuavaLoadingCache.SingleLoader<K,V>

All Implemented Interfaces:

AsyncCacheLoader<K,V>, CacheLoader<K,V>, java.io.Serializable

Direct Known Subclasses:

CaffeinatedGuavaLoadingCache.BulkLoader

Enclosing class:

CaffeinatedGuavaLoadingCache<K,V>

static class CaffeinatedGuavaLoadingCache.SingleLoader<K,V>
extends java.lang.Object
implements CacheLoader<K,V>, java.io.Serializable

Field Summary

Fields

Modifier and Type	Field	Description
(package private) com.google.common.cache.CacheLoader<K,V>	cacheLoader
private static long	serialVersionUID

Constructor Summary

Constructors

Constructor	Description
SingleLoader(com.google.common.cache.CacheLoader<K,V> cacheLoader)

Method Summary

Modifier and Type	Method	Description
V	load(K key)	Computes or retrieves the value corresponding to key.
V	reload(K key, V oldValue)	Computes or retrieves a replacement value corresponding to an already-cached key.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.github.benmanes.caffeine.cache.CacheLoader

asyncLoad, asyncLoadAll, asyncReload, loadAll

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

cacheLoader

final com.google.common.cache.CacheLoader<K,V> cacheLoader

Constructor Detail

SingleLoader

SingleLoader(com.google.common.cache.CacheLoader<K,V> cacheLoader)

Method Detail

load

public V load(K key)

Description copied from interface: CacheLoader

Computes or retrieves the value corresponding to key.

Warning: loading must not attempt to update any mappings of this cache directly.

Specified by:

load in interface CacheLoader<K,V>

Parameters:

key - the non-null key whose value should be loaded

Returns:

the value associated with key or null if not found

reload

public V reload(K key,
                V oldValue)

Description copied from interface: CacheLoader

Computes or retrieves a replacement value corresponding to an already-cached key. If the replacement value is not found then the mapping will be removed if null is returned. This method is called when an existing cache entry is refreshed by Caffeine.refreshAfterWrite(java.time.Duration), or through a call to LoadingCache.refresh(K).

Note: all exceptions thrown by this method will be logged and then swallowed.

Specified by:

reload in interface CacheLoader<K,V>

Parameters:

key - the non-null key whose value should be loaded

oldValue - the non-null old value corresponding to key

Returns:

the new value associated with key, or null if the mapping is to be removed