org.optaplanner.core.impl.domain.common

Class ConcurrentMemoization<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

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

org.optaplanner.core.impl.domain.common.ConcurrentMemoization<K,V>

Type Parameters:

K - the parameter of the calculation

V - the result of the calculation

All Implemented Interfaces:

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

public final class ConcurrentMemoization<K,V>
extends ConcurrentHashMap<K,V>

A thread-safe memoization that caches a calculation.

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 and Description
ConcurrentMemoization()

Method Summary

Modifier and Type	Method and Description
V	computeIfAbsent(K key, Function<? super K,? extends V> mappingFunction) An overridden implementation that heavily favors read access over write access speed.

Methods inherited from class java.util.concurrent.ConcurrentHashMap

clear, compute, computeIfPresent, contains, containsKey, containsValue, elements, entrySet, equals, forEach, forEach, forEach, forEachEntry, forEachEntry, forEachKey, forEachKey, forEachValue, forEachValue, get, getOrDefault, hashCode, isEmpty, keys, keySet, keySet, mappingCount, merge, newKeySet, newKeySet, put, putAll, putIfAbsent, reduce, reduceEntries, reduceEntries, reduceEntriesToDouble, reduceEntriesToInt, reduceEntriesToLong, reduceKeys, reduceKeys, reduceKeysToDouble, reduceKeysToInt, reduceKeysToLong, reduceToDouble, reduceToInt, reduceToLong, reduceValues, reduceValues, reduceValuesToDouble, reduceValuesToInt, reduceValuesToLong, remove, remove, replace, replace, replaceAll, 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 Detail

ConcurrentMemoization

public ConcurrentMemoization()

Method Detail

computeIfAbsent

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

An overridden implementation that heavily favors read access over write access speed. This is thread-safe.

Specified by:

computeIfAbsent in interface ConcurrentMap<K,V>

Specified by:

computeIfAbsent in interface Map<K,V>

Overrides:

computeIfAbsent in class ConcurrentHashMap<K,V>