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java.lang.Object net.sf.ehcache.util.concurrent.ConcurrentHashMap<K,V> net.sf.ehcache.store.cachingtier.CountBasedBackEnd<K,V>
K
- the key typeV
- the value typepublic class CountBasedBackEnd<K,V>
A backend to a OnHeapCachingTier that will be cap'ed based on the amount of entries
Nested Class Summary |
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Nested classes/interfaces inherited from class net.sf.ehcache.util.concurrent.ConcurrentHashMap |
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ConcurrentHashMap.EntrySetView<K,V>, ConcurrentHashMap.KeySetView<K,V>, ConcurrentHashMap.Node, ConcurrentHashMap.RemovalCallback, ConcurrentHashMap.Spliterator<T>, ConcurrentHashMap.TreeNode, ConcurrentHashMap.ValuesView<K,V> |
Nested classes/interfaces inherited from interface net.sf.ehcache.store.cachingtier.HeapCacheBackEnd |
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HeapCacheBackEnd.EvictionCallback<K,V> |
Nested classes/interfaces inherited from interface java.util.Map |
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Map.Entry<K,V> |
Field Summary |
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Fields inherited from class net.sf.ehcache.util.concurrent.ConcurrentHashMap |
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FAKE_NODE, FAKE_TREE_NODE |
Constructor Summary | |
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CountBasedBackEnd(long maxEntriesLocalHeap)
Constructs a cap'ed backend |
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CountBasedBackEnd(long maxEntriesLocalHeap,
Policy policy)
Constructs a cap'ed backend |
Method Summary | |
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void |
clear(boolean notify)
Basically CHM.clear() |
long |
getMaxEntriesLocalHeap()
Reads the current capacity limit |
Policy |
getPolicy()
queries the potential eviction policy for the heap caching tier |
boolean |
hasSpace()
Return true if this tier has enough space for more entries. |
V |
putIfAbsent(K key,
V value)
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void |
recalculateSize(K key)
This is evil! Don't call this! |
void |
registerEvictionCallback(HeapCacheBackEnd.EvictionCallback<K,V> evictionCallback)
Let's you register a single callback for evictions |
V |
remove(Object key)
Removes the key (and its corresponding value) from this map. |
void |
setMaxEntriesLocalHeap(long maxEntriesLocalHeap)
Sets the capacity limit |
void |
setPolicy(Policy policy)
Dynamic property to switch the policy out |
Methods inherited from class net.sf.ehcache.util.concurrent.ConcurrentHashMap |
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clear, contains, containsKey, containsValue, elements, entrySet, entrySpliterator, equals, get, getRandomValues, getValueOrDefault, hashCode, internalPutIfAbsent, isEmpty, keys, keySet, keySet, keySpliterator, mappingCount, newKeySet, newKeySet, put, putAll, remove, remove, removeAndNotify, removeAndNotify, replace, replace, setPoolAccessor, size, toString, values, valueSpliterator |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Methods inherited from interface net.sf.ehcache.store.cachingtier.HeapCacheBackEnd |
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entrySet, get, remove, replace, size |
Constructor Detail |
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public CountBasedBackEnd(long maxEntriesLocalHeap)
maxEntriesLocalHeap
- amount of mappings this should hold before it starts evictingpublic CountBasedBackEnd(long maxEntriesLocalHeap, Policy policy)
maxEntriesLocalHeap
- amount of mappings this should hold before it starts evictingpolicy
- the policy it'll use to decide what to evictMethod Detail |
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public void setPolicy(Policy policy)
setPolicy
in interface HeapCacheBackEnd<K,V>
policy
- the new eviction Policy to usepublic V putIfAbsent(K key, V value)
putIfAbsent
in interface ConcurrentMap<K,V>
putIfAbsent
in interface HeapCacheBackEnd<K,V>
putIfAbsent
in class ConcurrentHashMap<K,V>
key
- key with which the specified value is to be associatedvalue
- value to be associated with the specified key
null
if there was no mapping for the keypublic void registerEvictionCallback(HeapCacheBackEnd.EvictionCallback<K,V> evictionCallback)
registerEvictionCallback
in interface HeapCacheBackEnd<K,V>
evictionCallback
- the thing to call back onpublic void recalculateSize(K key)
HeapCacheBackEnd
recalculateSize
in interface HeapCacheBackEnd<K,V>
recalculateSize
in class ConcurrentHashMap<K,V>
public V remove(Object key)
ConcurrentHashMap
remove
in interface Map<K,V>
remove
in interface HeapCacheBackEnd<K,V>
remove
in class ConcurrentHashMap<K,V>
key
- the key that needs to be removed
key
, or
null
if there was no mapping for key
public Policy getPolicy()
HeapCacheBackEnd
getPolicy
in interface HeapCacheBackEnd<K,V>
public void clear(boolean notify)
HeapCacheBackEnd
CHM.clear()
clear
in interface HeapCacheBackEnd<K,V>
notify
- whether to notify listeners or notpublic boolean hasSpace()
HeapCacheBackEnd
true
if this tier has enough space for more entries.
hasSpace
in interface HeapCacheBackEnd<K,V>
true
if there is space for more entries.public void setMaxEntriesLocalHeap(long maxEntriesLocalHeap)
maxEntriesLocalHeap
- the new limitpublic long getMaxEntriesLocalHeap()
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