Package org.apache.camel.support.cache

Class SimpleLRUCache<K,V>

java.lang.Object

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

Type Parameters:

K - type of the key

V - type of the value

All Implemented Interfaces:

Map<K,V>

public class SimpleLRUCache<K,V>
extends Object
implements Map<K,V>

SimpleLRUCache is a simple implementation of a Least Recently Used cache. 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.

Nested Class Summary

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
void	clear()
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)
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<K,V>>	entrySet()
V	get(Object key)
boolean	isEmpty()
Set<K>	keySet()
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	remove(Object key)
boolean	remove(Object key, Object 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)
int	size()
Collection<V>	values()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Map

equals, forEach, getOrDefault, hashCode

Constructor Details

SimpleLRUCache

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

Method Details

size

public int size()

Specified by:

size in interface Map<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,V>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,V>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<K,V>

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

remove

public boolean remove(Object key,
 Object value)

Specified by:

remove in interface Map<K,V>

put

public V put(K key,
 V value)

Specified by:

put in interface Map<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

putIfAbsent

public V putIfAbsent(K key,
 V value)

Specified by:

putIfAbsent in interface Map<K,V>

computeIfAbsent

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

Specified by:

computeIfAbsent in interface Map<K,V>

computeIfPresent

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

Specified by:

computeIfPresent in interface Map<K,V>

compute

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

Specified by:

compute in interface Map<K,V>

merge

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

Specified by:

merge in interface Map<K,V>

replace

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

Specified by:

replace in interface Map<K,V>

replace

public V replace(K key,
 V value)

Specified by:

replace in interface Map<K,V>

putAll

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

Specified by:

putAll in interface Map<K,V>

clear

public void clear()

Specified by:

clear in interface Map<K,V>

keySet

public Set<K> keySet()

Specified by:

keySet in interface Map<K,V>

values

public Collection<V> values()

Specified by:

values in interface Map<K,V>

replaceAll

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

Specified by:

replaceAll in interface Map<K,V>

entrySet

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

Specified by:

entrySet in interface Map<K,V>