org.infinispan.commons.util.concurrent

Class StripedCounters<T>

java.lang.Object

org.infinispan.commons.util.concurrent.StripedCounters<T>

public class StripedCounters<T>
extends java.lang.Object

Duplicates a set of counters in a set of stripes, so that multiple threads can increment those counters without too much contention.

Callers must first obtain a stripe for the current thread with stripeForCurrentThread(), then use increment(AtomicLongFieldUpdater, Object) or add(AtomicLongFieldUpdater, Object, long) to update one or more counters in that stripe. They must also provide a AtomicLongFieldUpdater to access a specific counter in the stripe - it should be defined as static final so that it can be inlined by the JIT.

Since:

9.0

Constructor Summary

Constructors

Constructor and Description
StripedCounters(java.util.function.Supplier<T> stripeSupplier)

Method Summary

Modifier and Type	Method and Description
void	add(java.util.concurrent.atomic.AtomicLongFieldUpdater<T> updater, T stripe, long delta)
long	get(java.util.concurrent.atomic.AtomicLongFieldUpdater<T> updater)
void	increment(java.util.concurrent.atomic.AtomicLongFieldUpdater<T> updater, T stripe)
void	reset(java.util.concurrent.atomic.AtomicLongFieldUpdater<T> updater)
T	stripeForCurrentThread()

Methods inherited from class java.lang.Object

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

Constructor Detail

StripedCounters

public StripedCounters(java.util.function.Supplier<T> stripeSupplier)

Method Detail

increment

public void increment(java.util.concurrent.atomic.AtomicLongFieldUpdater<T> updater,
                      T stripe)

add

public void add(java.util.concurrent.atomic.AtomicLongFieldUpdater<T> updater,
                T stripe,
                long delta)

get

public long get(java.util.concurrent.atomic.AtomicLongFieldUpdater<T> updater)

reset

public void reset(java.util.concurrent.atomic.AtomicLongFieldUpdater<T> updater)

stripeForCurrentThread

public T stripeForCurrentThread()