Class LocalAsyncLoadingCache.LoadingCacheView<K,V>
- java.lang.Object
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- com.github.benmanes.caffeine.cache.LocalAsyncCache.AbstractCacheView<K,V>
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- com.github.benmanes.caffeine.cache.LocalAsyncLoadingCache.LoadingCacheView<K,V>
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- All Implemented Interfaces:
Cache<K,V>
,LoadingCache<K,V>
,java.io.Serializable
- Enclosing class:
- LocalAsyncLoadingCache<K,V>
static final class LocalAsyncLoadingCache.LoadingCacheView<K,V> extends LocalAsyncCache.AbstractCacheView<K,V> implements LoadingCache<K,V>
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Field Summary
Fields Modifier and Type Field Description (package private) LocalAsyncLoadingCache<K,V>
asyncCache
private static long
serialVersionUID
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Fields inherited from class com.github.benmanes.caffeine.cache.LocalAsyncCache.AbstractCacheView
asMapView
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Constructor Summary
Constructors Constructor Description LoadingCacheView(LocalAsyncLoadingCache<K,V> asyncCache)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description (package private) LocalAsyncLoadingCache<K,V>
asyncCache()
V
get(K key)
Returns the value associated with thekey
in this cache, obtaining that value fromCacheLoader.load(Object)
if necessary.java.util.Map<K,V>
getAll(java.lang.Iterable<? extends K> keys)
Returns a map of the values associated with thekeys
, creating or retrieving those values if necessary.void
refresh(K key)
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
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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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 Detail
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serialVersionUID
private static final long serialVersionUID
- See Also:
- Constant Field Values
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asyncCache
final LocalAsyncLoadingCache<K,V> asyncCache
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Constructor Detail
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LoadingCacheView
LoadingCacheView(LocalAsyncLoadingCache<K,V> asyncCache)
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Method Detail
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asyncCache
LocalAsyncLoadingCache<K,V> asyncCache()
- Specified by:
asyncCache
in classLocalAsyncCache.AbstractCacheView<K,V>
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get
public V get(K key)
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
public java.util.Map<K,V> getAll(java.lang.Iterable<? extends K> keys)
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
public void refresh(K key)
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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