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Oracle Fusion Middleware Java API Reference for Oracle Extension SDK Reference 11g Release 1 (11.1.1) E13403-04 |
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java.lang.Object oracle.javatools.util.Maps.CacheStrategy<K,V,E> oracle.javatools.util.Maps.BoundedLruCacheStrategy<K,V,E>
public static class Maps.BoundedLruCacheStrategy<K,V,E extends Maps.AbstractLinkedEntry<K,V>>
A bounded size LRU cache strategy.
Maps.AbstractCacheMap
,
Maps.CacheStrategy
Field Summary |
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Fields inherited from class oracle.javatools.util.Maps.CacheStrategy |
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CANONICAL, DEFAULT_INITIAL_CAPACITY, DEFAULT_LOAD_FACTOR, HARD, NONCANONICAL, SOFT, WEAK |
Constructor Summary | |
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Maps.BoundedLruCacheStrategy(int maximumSize)
Constructs a bounded LRU (least recently used), hard-referenced value, canonically mapped cache strategy. |
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Maps.BoundedLruCacheStrategy(int maximumSize,
int initialCapacity,
float loadFactor,
Maps.AbstractCacheMap.ReferenceType valueReferenceType,
Maps.AbstractCacheMap.MappingType mappingType)
Constructs an unbounded cache strategy. |
Method Summary | |
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protected boolean |
evictEldest(Maps.AbstractCacheMap<K,V,E> map,
E eldest)
Gets whether to evict the eldest entry from a cache. |
Methods inherited from class oracle.javatools.util.Maps.CacheStrategy |
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entryAccessed, entryAdded, entryChanged, entryEvicted, entryPurged, entryRemoved, getInitialCapacity, getLoadFactor, getMappingType, getValueReferenceType, mapChanged |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public Maps.BoundedLruCacheStrategy(int maximumSize)
maximumSize+1
and 1.0f
, respectively,
which ensures that the map will not have to resize before reaching its
maximum size.
maximumSize
- The maximum number of entries allowed in the map.public Maps.BoundedLruCacheStrategy(int maximumSize, int initialCapacity, float loadFactor, Maps.AbstractCacheMap.ReferenceType valueReferenceType, Maps.AbstractCacheMap.MappingType mappingType)
Method Detail |
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protected boolean evictEldest(Maps.AbstractCacheMap<K,V,E> map, E eldest)
Maps.CacheStrategy.entryAdded(oracle.javatools.util.Maps.AbstractCacheMap, E)
is invoked, but not
if Maps.CacheStrategy.entryAdded(oracle.javatools.util.Maps.AbstractCacheMap, E)
modifies the map.
The Maps.CacheStrategy
implementation returns false.
The Maps.BoundedLruCacheStrategy
implementation returns true if the
added value has caused the map to exceed the maximum size.
evictEldest
in class Maps.CacheStrategy<K,V,E extends Maps.AbstractLinkedEntry<K,V>>
eldest
- The eldest entry in the map, potentially to be evicted.
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Oracle Fusion Middleware Java API Reference for Oracle Extension SDK Reference 11g Release 1 (11.1.1) E13403-04 |
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