com.hazelcast.util

Class ConcurrencyUtil

java.lang.Object

com.hazelcast.util.ConcurrencyUtil

public final class ConcurrencyUtil
extends Object

Utility methods to getOrPutSynchronized and getOrPutIfAbsent in a thread safe way from ConcurrentMap with a ConstructorFunction.

Method Summary

Methods

Modifier and Type	Method and Description
static <K,V> V	getOrPutIfAbsent(ConcurrentMap<K,V> map, K key, ConstructorFunction<K,V> func)
static <K,V> V	getOrPutSynchronized(ConcurrentMap<K,V> map, K key, ContextMutexFactory contextMutexFactory, ConstructorFunction<K,V> func)
static <K,V> V	getOrPutSynchronized(ConcurrentMap<K,V> map, K key, Object mutex, ConstructorFunction<K,V> func)
static <E> void	setMax(E obj, AtomicLongFieldUpdater<E> updater, long value) Atomically sets the max value.

Methods inherited from class java.lang.Object

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

Method Detail

setMax

public static <E> void setMax(E obj,
              AtomicLongFieldUpdater<E> updater,
              long value)

Atomically sets the max value. If the current value is larger than the provided value, the call is ignored. So it will not happen that a smaller value will overwrite a larger value.

getOrPutSynchronized

public static <K,V> V getOrPutSynchronized(ConcurrentMap<K,V> map,
                           K key,
                           Object mutex,
                           ConstructorFunction<K,V> func)

getOrPutSynchronized

public static <K,V> V getOrPutSynchronized(ConcurrentMap<K,V> map,
                           K key,
                           ContextMutexFactory contextMutexFactory,
                           ConstructorFunction<K,V> func)

getOrPutIfAbsent

public static <K,V> V getOrPutIfAbsent(ConcurrentMap<K,V> map,
                       K key,
                       ConstructorFunction<K,V> func)