public class OnHeapLoadingCache<K,V> extends Object implements LoadingCache<K,V>
| Constructor and Description |
|---|
OnHeapLoadingCache(int concurrencyLevel,
int initialCapacity,
Long maximumSize,
Long expireAfterAccess,
Long expireAfterWrite) |
| Modifier and Type | Method and Description |
|---|---|
void |
close()
Clean the used resources of the cache.
|
boolean |
equals(Object o) |
V |
get(K key,
Callable<? extends V> valueLoader)
Returns the value associated with
key in this cache, obtaining that value from
valueLoader if necessary. |
Map<K,V> |
getAllPresent(Iterable<K> keys)
Returns a map of the values associated with
keys in this cache. |
V |
getIfPresent(K key) |
LookupCacheStats |
getStats() |
int |
hashCode() |
void |
invalidate(K key)
Discards any cached value for key
key. |
void |
invalidateAll()
Clears the contents of the cache.
|
void |
invalidateAll(Iterable<K> keys)
Discards any cached values for keys
keys. |
boolean |
isClosed() |
void |
putAll(Map<? extends K,? extends V> m)
Copies all of the mappings from the specified map to the cache.
|
public OnHeapLoadingCache(int concurrencyLevel,
int initialCapacity,
Long maximumSize,
Long expireAfterAccess,
Long expireAfterWrite)
concurrencyLevel - default to DEFAULT_CONCURRENCY_LEVELinitialCapacity - default to DEFAULT_INITIAL_CAPACITYmaximumSize - Max number of entries that the cache can hold, When set to zero, elements will be evicted immediately after being loaded into the
cache.
When set to null, cache maximum size is infinityexpireAfterAccess - Specifies that each entry should be automatically removed from the cache once a fixed duration
has elapsed after the entry's creation, the most recent replacement of its value, or its last
access. Access time is reset by all cache read and write operations.
No read-time-based eviction when set to null.expireAfterWrite - Specifies that each entry should be automatically removed from the cache once a fixed duration
has elapsed after the entry's creation, or the most recent replacement of its value.
No write-time-based eviction when set to null.public V getIfPresent(K key)
getIfPresent in interface LoadingCache<K,V>key - must not be null
Returns the value associated with key in this cache, or null if there is no
cached value for key.
a cache miss should be counted if the key is missing.public void putAll(Map<? extends K,? extends V> m)
LoadingCacheputAll in interface LoadingCache<K,V>public Map<K,V> getAllPresent(Iterable<K> keys)
LoadingCachekeys in this cache. The returned map will
only contain entries which are already present in the cache.getAllPresent in interface LoadingCache<K,V>public V get(K key, Callable<? extends V> valueLoader) throws ExecutionException
LoadingCachekey in this cache, obtaining that value from
valueLoader if necessary. No observable state associated with this cache is modified
until loading completes.
Warning: as with CacheLoader.load(K), valueLoader must not return
null; it may either return a non-null value or throw an exception.
get in interface LoadingCache<K,V>ExecutionException - if a checked exception was thrown while loading the valuepublic void invalidate(K key)
LoadingCachekey. Eviction can be lazy or eager.invalidate in interface LoadingCache<K,V>public void invalidateAll(Iterable<K> keys)
LoadingCachekeys. Eviction can be lazy or eager.invalidateAll in interface LoadingCache<K,V>public void invalidateAll()
LoadingCacheinvalidateAll in interface LoadingCache<K,V>public LookupCacheStats getStats()
getStats in interface LoadingCache<K,V>public boolean isClosed()
isClosed in interface LoadingCache<K,V>public void close()
LoadingCacheclose in interface LoadingCache<K,V>close in interface Closeableclose in interface AutoCloseableCopyright © 2011–2017. All rights reserved.