Package org.apache.camel.support.cache

Class SimpleLRUCache<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.concurrent.ConcurrentHashMap<K,V>

org.apache.camel.support.cache.SimpleLRUCache<K,V>

Type Parameters:

K - type of the key

V - type of the value

All Implemented Interfaces:

Serializable, ConcurrentMap<K,V>, Map<K,V>

public class SimpleLRUCache<K,V>
extends ConcurrentHashMap<K,V>

SimpleLRUCache is a simple implementation of a cache of type Least Recently Used . The implementation doesn't accept null values. Generally speaking, the parameters of all the public methods must have a value otherwise a NullPointerException is thrown.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.concurrent.ConcurrentHashMap

ConcurrentHashMap.KeySetView<K,V>

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Constructor Summary

Constructors

Constructor	Description
SimpleLRUCache(int initialCapacity, int maximumCacheSize, Consumer<V> evicted)

Method Summary

Modifier and Type	Method	Description
V	compute(K key, BiFunction<? super K,? super V,? extends V> remappingFunction)
V	computeIfAbsent(K key, Function<? super K,? extends V> mappingFunction)
V	computeIfPresent(K key, BiFunction<? super K,? super V,? extends V> remappingFunction)
Set<Map.Entry<K,V>>	entrySet()
V	merge(K key, V value, BiFunction<? super V,? super V,? extends V> remappingFunction)
V	put(K key, V value)
void	putAll(Map<? extends K,? extends V> m)
V	putIfAbsent(K key, V value)
V	replace(K key, V value)
boolean	replace(K key, V oldValue, V newValue)
void	replaceAll(BiFunction<? super K,? super V,? extends V> function)

Methods inherited from class java.util.concurrent.ConcurrentHashMap

clear, contains, containsKey, containsValue, elements, equals, forEach, forEach, forEach, forEachEntry, forEachEntry, forEachKey, forEachKey, forEachValue, forEachValue, get, getOrDefault, hashCode, isEmpty, keys, keySet, keySet, mappingCount, newKeySet, newKeySet, reduce, reduceEntries, reduceEntries, reduceEntriesToDouble, reduceEntriesToInt, reduceEntriesToLong, reduceKeys, reduceKeys, reduceKeysToDouble, reduceKeysToInt, reduceKeysToLong, reduceToDouble, reduceToInt, reduceToLong, reduceValues, reduceValues, reduceValuesToDouble, reduceValuesToInt, reduceValuesToLong, remove, remove, search, searchEntries, searchKeys, searchValues, size, toString, values

Methods inherited from class java.util.AbstractMap

clone

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

SimpleLRUCache

public SimpleLRUCache(int initialCapacity,
 int maximumCacheSize,
 Consumer<V> evicted)

Method Details

put

public V put(K key,
 V value)

Specified by:

put in interface Map<K,V>

Overrides:

put in class ConcurrentHashMap<K,V>

putIfAbsent

public V putIfAbsent(K key,
 V value)

Specified by:

putIfAbsent in interface ConcurrentMap<K,V>

Specified by:

putIfAbsent in interface Map<K,V>

Overrides:

putIfAbsent in class ConcurrentHashMap<K,V>

computeIfAbsent

public V computeIfAbsent(K key,
 Function<? super K,? extends V> mappingFunction)

Specified by:

computeIfAbsent in interface ConcurrentMap<K,V>

Specified by:

computeIfAbsent in interface Map<K,V>

Overrides:

computeIfAbsent in class ConcurrentHashMap<K,V>

computeIfPresent

public V computeIfPresent(K key,
 BiFunction<? super K,? super V,? extends V> remappingFunction)

Specified by:

computeIfPresent in interface ConcurrentMap<K,V>

Specified by:

computeIfPresent in interface Map<K,V>

Overrides:

computeIfPresent in class ConcurrentHashMap<K,V>

compute

public V compute(K key,
 BiFunction<? super K,? super V,? extends V> remappingFunction)

Specified by:

compute in interface ConcurrentMap<K,V>

Specified by:

compute in interface Map<K,V>

Overrides:

compute in class ConcurrentHashMap<K,V>

merge

public V merge(K key,
 V value,
 BiFunction<? super V,? super V,? extends V> remappingFunction)

Specified by:

merge in interface ConcurrentMap<K,V>

Specified by:

merge in interface Map<K,V>

Overrides:

merge in class ConcurrentHashMap<K,V>

replace

public boolean replace(K key,
 V oldValue,
 V newValue)

Specified by:

replace in interface ConcurrentMap<K,V>

Specified by:

replace in interface Map<K,V>

Overrides:

replace in class ConcurrentHashMap<K,V>

replace

public V replace(K key,
 V value)

Specified by:

replace in interface ConcurrentMap<K,V>

Specified by:

replace in interface Map<K,V>

Overrides:

replace in class ConcurrentHashMap<K,V>

putAll

public void putAll(Map<? extends K,? extends V> m)

Specified by:

putAll in interface Map<K,V>

Overrides:

putAll in class ConcurrentHashMap<K,V>

replaceAll

public void replaceAll(BiFunction<? super K,? super V,? extends V> function)

Specified by:

replaceAll in interface ConcurrentMap<K,V>

Specified by:

replaceAll in interface Map<K,V>

Overrides:

replaceAll in class ConcurrentHashMap<K,V>

entrySet

public Set<Map.Entry<K,V>> entrySet()

Specified by:

entrySet in interface Map<K,V>

Overrides:

entrySet in class ConcurrentHashMap<K,V>