Class LocalAsyncLoadingCache.LoadingCacheView<K,V>
- All Implemented Interfaces:
Cache<K,
,V> LoadingCache<K,
,V> Serializable
- Enclosing class:
LocalAsyncLoadingCache<K,
V>
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Field Summary
FieldsModifier and TypeFieldDescription(package private) final LocalAsyncLoadingCache
<K, V> private static final long
Fields inherited from class com.github.benmanes.caffeine.cache.LocalAsyncCache.AbstractCacheView
asMapView
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescription(package private) LocalAsyncLoadingCache
<K, V> Returns the value associated with thekey
in this cache, obtaining that value fromCacheLoader.load(Object)
if necessary.Returns a map of the values associated with thekeys
, creating or retrieving those values if necessary.void
Loads a new value for thekey
, asynchronously.Methods inherited from class com.github.benmanes.caffeine.cache.LocalAsyncCache.AbstractCacheView
asMap, cleanUp, estimatedSize, get, getAll, getAllPresent, getIfPresent, invalidate, invalidateAll, invalidateAll, policy, put, putAll, resolve, stats
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.Cache
asMap, cleanUp, estimatedSize, get, getAll, getAllPresent, getIfPresent, invalidate, invalidateAll, invalidateAll, policy, put, putAll, stats
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Field Details
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serialVersionUID
private static final long serialVersionUID- See Also:
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asyncCache
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Constructor Details
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LoadingCacheView
LoadingCacheView(LocalAsyncLoadingCache<K, V> asyncCache)
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Method Details
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asyncCache
LocalAsyncLoadingCache<K,V> asyncCache()- Specified by:
asyncCache
in classLocalAsyncCache.AbstractCacheView<K,
V>
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get
Description copied from interface:LoadingCache
Returns the value associated with thekey
in this cache, obtaining that value fromCacheLoader.load(Object)
if necessary.If another call to
LoadingCache.get(K)
is currently loading the value for thekey
, this thread simply waits for that thread to finish and returns its loaded value. Note that multiple threads can concurrently load values for distinct keys.If the specified key is not already associated with a value, attempts to compute its value and enters it into this cache unless
null
. The entire method invocation is performed atomically, so the function is applied at most once per key. Some attempted update operations on this cache by other threads may be blocked while the computation is in progress, so the computation should be short and simple, and must not attempt to update any other mappings of this cache.- Specified by:
get
in interfaceLoadingCache<K,
V> - Parameters:
key
- key with which the specified value is to be associated- Returns:
- the current (existing or computed) value associated with the specified key, or null if the computed value is null
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getAll
Description copied from interface:LoadingCache
Returns a map of the values associated with thekeys
, creating or retrieving those values if necessary. The returned map contains entries that were already cached, combined with the newly loaded entries; it will never contain null keys or values.Caches loaded by a
CacheLoader
will issue a single request toCacheLoader.loadAll(java.lang.Iterable<? extends K>)
for all keys which are not already present in the cache. All entries returned byCacheLoader.loadAll(java.lang.Iterable<? extends K>)
will be stored in the cache, over-writing any previously cached values. If another call toLoadingCache.get(K)
tries to load the value for a key inkeys
, implementations may either have that thread load the entry or simply wait for this thread to finish and returns the loaded value. In the case of overlapping non-blocking loads, the last load to complete will replace the existing entry. Note that multiple threads can concurrently load values for distinct keys.Note that duplicate elements in
keys
, as determined byObject.equals(java.lang.Object)
, will be ignored.- Specified by:
getAll
in interfaceLoadingCache<K,
V> - Parameters:
keys
- the keys whose associated values are to be returned- Returns:
- the unmodifiable mapping of keys to values for the specified keys in this cache
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refresh
Description copied from interface:LoadingCache
Loads a new value for thekey
, asynchronously. While the new value is loading the previous value (if any) will continue to be returned byget(key)
unless it is evicted. If the new value is loaded successfully it will replace the previous value in the cache; if an exception is thrown while refreshing the previous value will remain, and the exception will be logged (usingLogger
) and swallowed.Caches loaded by a
CacheLoader
will callCacheLoader.reload(K, V)
if the cache currently contains a value for thekey
, andCacheLoader.load(K)
otherwise. Loading is asynchronous by delegating to the default executor.- Specified by:
refresh
in interfaceLoadingCache<K,
V> - Parameters:
key
- key with which a value may be associated
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