org.apache.camel.util
Class LRUWeakCache<K,V>
java.lang.Object
org.apache.camel.util.LRUCache<K,V>
org.apache.camel.util.LRUWeakCache<K,V>
- All Implemented Interfaces:
- com.googlecode.concurrentlinkedhashmap.EvictionListener<K,V>, Serializable, Map<K,V>
public class LRUWeakCache<K,V>
- extends LRUCache<K,V>
A Least Recently Used Cache which uses WeakReference
.
This implementation uses WeakReference
for stored values in the cache, to support the JVM
when it wants to reclaim objects for example during garbage collection. Therefore this implementation does
not support all the Map
methods.
The following methods is only be be used:
- containsKey - To determine if the key is in the cache and refers to a value
- entrySet - To return a set of all the entries (as key/value paris)
- get - To get a value from the cache
- isEmpty - To determine if the cache contains any values
- keySet - To return a set of the current keys which refers to a value
- put - To add a value to the cache
- putAll - To add values to the cache
- remove - To remove a value from the cache by its key
- size - To get the current size
- values - To return a copy of all the value in a list
The LRUCache.containsValue(Object)
method should not be used as it's not adjusted to check
for the existence of a value without catering for the soft references.
Notice that if the JVM reclaim memory the content of this cache may be garbage collected, without any
eviction notifications.
- See Also:
LRUCache
,
LRUSoftCache
,
Serialized Form
Nested classes/interfaces inherited from interface java.util.Map |
Map.Entry<K,V> |
LRUWeakCache
public LRUWeakCache(int maximumCacheSize)
LRUWeakCache
public LRUWeakCache(int initialCapacity,
int maximumCacheSize)
put
public V put(K key,
V value)
- Specified by:
put
in interface Map<K,V>
- Overrides:
put
in class LRUCache<K,V>
get
public V get(Object o)
- Specified by:
get
in interface Map<K,V>
- Overrides:
get
in class LRUCache<K,V>
putAll
public void putAll(Map<? extends K,? extends V> map)
- Specified by:
putAll
in interface Map<K,V>
- Overrides:
putAll
in class LRUCache<K,V>
remove
public V remove(Object o)
- Specified by:
remove
in interface Map<K,V>
- Overrides:
remove
in class LRUCache<K,V>
values
public Collection<V> values()
- Specified by:
values
in interface Map<K,V>
- Overrides:
values
in class LRUCache<K,V>
size
public int size()
- Specified by:
size
in interface Map<K,V>
- Overrides:
size
in class LRUCache<K,V>
isEmpty
public boolean isEmpty()
- Specified by:
isEmpty
in interface Map<K,V>
- Overrides:
isEmpty
in class LRUCache<K,V>
containsKey
public boolean containsKey(Object o)
- Specified by:
containsKey
in interface Map<K,V>
- Overrides:
containsKey
in class LRUCache<K,V>
entrySet
public Set<Map.Entry<K,V>> entrySet()
- Specified by:
entrySet
in interface Map<K,V>
- Overrides:
entrySet
in class LRUCache<K,V>
toString
public String toString()
- Overrides:
toString
in class LRUCache<K,V>
Apache Camel