/**
* Internal conversion method to convert CompletableFutures to FastFuture.
*
* @param cf
* @return
*/
public static <T> FastFuture<T> fromCompletableFuture(CompletableFuture<T> cf) {
FastFuture<T> f = new FastFuture<>();
cf.thenAccept(i -> f.set(i));
cf.exceptionally(
t -> {
f.completedExceptionally(t);
return f.join();
});
return f;
}
public static <R> FastFuture<List<R>> anyOf(FastFuture... futures) {
FastFuture anyOf = new FastFuture();
for (FastFuture next : futures) {
next.onComplete(
v -> {
anyOf.result.lazySet(true);
anyOf.done();
});
}
return anyOf;
}
/*
* @param t Result type
* @see java.util.function.Consumer#accept(java.lang.Object)
*/
@Override
public void accept(FastFuture<T> t) {
active.add(t);
if (active.size() > maxActive.getMaxActive()) {
while (active.size() > maxActive.getReduceTo()) {
List<FastFuture> toRemove =
active
.stream()
.filter(cf -> cf.isDone())
.peek(this::handleExceptions)
.collect(Collectors.toList());
active.removeAll(toRemove);
if (active.size() > maxActive.getReduceTo()) {
CompletableFuture promise = new CompletableFuture();
FastFuture.xOf(
active.size() - maxActive.getReduceTo(),
() -> promise.complete(true),
active.toArray(new FastFuture[0]));
promise.join();
}
}
}
}
public static <R> FastFuture<List<R>> xOf(int x, Runnable onComplete, FastFuture... futures) {
// needs to use onComplete
FastFuture xOf = new FastFuture(FinalPipeline.empty(), x);
for (FastFuture next : futures) {
AtomicInteger count = new AtomicInteger(0);
next.onComplete(
v -> {
if (!count.compareAndSet(0, 1)) return;
if (xOf.count.incrementAndGet() >= xOf.max.get()) {
onComplete.run();
}
});
}
return xOf;
}
private void handleExceptions(FastFuture cf) {
if (cf.isCompletedExceptionally()) safeJoin.apply(cf);
}
public static <T> FastFuture<T> completedFuture(T value) {
FastFuture<T> f = new FastFuture();
f.result.lazySet(value);
f.done = true;
return f;
}