@Override
public CompletableFuture<Boolean> compareAndSet(V expect, V update) {
final MeteringAgent.Context newTimer = monitor.startTimer(COMPARE_AND_SET);
return backingMap
.replace(name, serializer.encode(expect), serializer.encode(update))
.whenComplete((r, e) -> newTimer.stop(e));
}
@Override
public CompletableFuture<Void> addListener(AtomicValueEventListener<V> listener) {
checkNotNull(listener, "listener must not be null");
final MeteringAgent.Context newTimer = monitor.startTimer(ADD_LISTENER);
MapEventListener<String, byte[]> mapListener =
listeners.computeIfAbsent(listener, key -> new InternalMapValueEventListener(listener));
return backingMap.addListener(mapListener).whenComplete((r, e) -> newTimer.stop(e));
}
@Override
public CompletableFuture<V> get() {
final MeteringAgent.Context newTimer = monitor.startTimer(GET);
return backingMap
.get(name)
.thenApply(Versioned::valueOrNull)
.thenApply(v -> v == null ? null : serializer.<V>decode(v))
.whenComplete((r, e) -> newTimer.stop(e));
}
@Override
public CompletableFuture<Void> set(V value) {
final MeteringAgent.Context newTimer = monitor.startTimer(SET);
if (value == null) {
return backingMap.remove(name).whenComplete((r, e) -> newTimer.stop(e)).thenApply(v -> null);
}
return backingMap
.put(name, serializer.encode(value))
.whenComplete((r, e) -> newTimer.stop(e))
.thenApply(v -> null);
}
@Override
public CompletableFuture<Void> removeListener(AtomicValueEventListener<V> listener) {
checkNotNull(listener, "listener must not be null");
final MeteringAgent.Context newTimer = monitor.startTimer(REMOVE_LISTENER);
MapEventListener<String, byte[]> mapListener = listeners.remove(listener);
if (mapListener != null) {
return backingMap.removeListener(mapListener).whenComplete((r, e) -> newTimer.stop(e));
} else {
newTimer.stop(null);
return CompletableFuture.completedFuture(null);
}
}
@Override
public CompletableFuture<V> getAndSet(V value) {
final MeteringAgent.Context newTimer = monitor.startTimer(GET_AND_SET);
if (value == null) {
return backingMap
.remove(name)
.thenApply(Versioned::valueOrNull)
.thenApply(v -> v == null ? null : serializer.<V>decode(v))
.whenComplete((r, e) -> newTimer.stop(e));
}
return backingMap
.put(name, serializer.encode(value))
.thenApply(Versioned::valueOrNull)
.thenApply(v -> v == null ? null : serializer.<V>decode(v))
.whenComplete((r, e) -> newTimer.stop(e));
}
