Examples with Continuation com.oath.cyclops.types.futurestream.Continuation used on opensource projects

Example 6 with Continuation

use of com.oath.cyclops.types.futurestream.Continuation in project cyclops by aol.

the class SpliteratorBasedStream method changes.

public ReactiveSeq<T> changes() {
    return ReactiveSeq.defer(() -> {
        com.oath.cyclops.async.adapters.Queue<T> queue = QueueFactories.<T>unboundedNonBlockingQueue().build();
        Spliterator<T> copy = copy();
        Continuation[] contRef = { null };
        Signal<T> signal = new Signal<T>(null, queue);
        AtomicBoolean wip = new AtomicBoolean(false);
        Continuation cont = new Continuation(() -> {
            if (wip.compareAndSet(false, true)) {
                if (!copy.tryAdvance(signal::set)) {
                    signal.close();
                    return Continuation.empty();
                }
                wip.set(false);
            }
            return contRef[0];
        });
        contRef[0] = cont;
        queue.addContinuation(cont);
        return signal.getDiscrete().stream();
    });
}

Example 7 with Continuation

use of com.oath.cyclops.types.futurestream.Continuation in project cyclops by aol.

the class ReactiveSeq method foldParallel.

default <R> R foldParallel(Function<? super Stream<T>, ? extends R> fn) {
    Queue<T> queue = QueueFactories.<T>unboundedNonBlockingQueue().build().withTimeout(1);
    AtomicReference<Continuation> ref = new AtomicReference<>(null);
    Continuation cont = new Continuation(() -> {
        if (ref.get() == null && ref.compareAndSet(null, Continuation.empty())) {
            try {
                // use the first consuming thread to tell this Stream onto the Queue
                this.spliterator().forEachRemaining(queue::offer);
            } finally {
                queue.close();
            }
        }
        return Continuation.empty();
    });
    ;
    queue.addContinuation(cont);
    return fn.apply(queue.jdkStream().parallel());
}

Example 8 with Continuation

use of com.oath.cyclops.types.futurestream.Continuation in project cyclops by aol.

the class ReactiveSeq method parallel.

default <R> ReactiveSeq<R> parallel(ForkJoinPool fj, Function<? super Stream<T>, ? extends Stream<? extends R>> fn) {
    return defer(() -> {
        Queue<R> queue = QueueFactories.<R>unboundedNonBlockingQueue().build();
        ReactiveSeq<? extends Iterator<? extends R>> stream = ReactiveSeq.<Stream<? extends R>>generate(() -> foldParallel(fj, fn)).take(1).map(s -> s.iterator());
        Iterator[] it = { null };
        Continuation[] store = { null };
        Continuation cont = new Continuation(() -> {
            if (it[0] == null)
                it[0] = stream.asFunction().apply(0l);
            Iterator<R> local = it[0];
            try {
                if (!local.hasNext()) {
                    queue.close();
                    return Continuation.empty();
                } else {
                    queue.offer(local.next());
                }
            } catch (Throwable t) {
                queue.close();
                throw ExceptionSoftener.throwSoftenedException(t);
            }
            return store[0];
        });
        ;
        store[0] = cont;
        queue.addContinuation(cont);
        return queue.stream();
    });
}

Example 9 with Continuation

use of com.oath.cyclops.types.futurestream.Continuation in project cyclops by aol.

the class ReactiveSeq method parallel.

default <R> ReactiveSeq<R> parallel(Function<? super Stream<T>, ? extends Stream<? extends R>> fn) {
    return defer(() -> {
        Queue<R> queue = QueueFactories.<R>unboundedNonBlockingQueue().build();
        ReactiveSeq<Iterator<? extends R>> stream = ReactiveSeq.<Stream<? extends R>>generate(() -> foldParallel(fn)).take(1).map(s -> s.iterator());
        Iterator[] it = { null };
        Continuation[] store = { null };
        Continuation cont = new Continuation(() -> {
            if (it[0] == null)
                it[0] = stream.asFunction().apply(0l);
            Iterator<R> local = it[0];
            try {
                if (!local.hasNext()) {
                    queue.close();
                    return Continuation.empty();
                } else {
                    queue.offer(local.next());
                }
            } catch (Throwable t) {
                queue.close();
                throw ExceptionSoftener.throwSoftenedException(t);
            }
            return store[0];
        });
        ;
        store[0] = cont;
        queue.addContinuation(cont);
        return queue.stream();
    });
}

Example 10 with Continuation

use of com.oath.cyclops.types.futurestream.Continuation in project cyclops by aol.

the class Runner method runContinuations.

public Continuation runContinuations(final LazyStreamWrapper lastActive, final EmptyCollector collector, boolean blocking) {
    final Iterator<FastFuture> it = lastActive.injectFutures().iterator();
    final Continuation[] cont = new Continuation[1];
    final Continuation finish = new Continuation(() -> {
        collector.afterResults(() -> {
            runnable.run();
            throw new ClosedQueueException();
        });
        return Continuation.empty();
    });
    final Continuation blockingFinish = new Continuation(() -> {
        collector.getResults();
        runnable.run();
        throw new ClosedQueueException();
    });
    final Continuation finishNoCollect = new Continuation(() -> {
        runnable.run();
        throw new ClosedQueueException();
    });
    cont[0] = new Continuation(() -> {
        try {
            if (it.hasNext()) {
                final FastFuture f = it.next();
                // if FastFuture has been filtered out, we need to move to the next one instead
                handleFilter(cont, f);
                collector.accept(f);
            }
            if (it.hasNext())
                return cont[0];
            else {
                return blocking ? blockingFinish.proceed() : finish.proceed();
            }
        } catch (final SimpleReactProcessingException e) {
        } catch (final java.util.concurrent.CompletionException e) {
        } catch (final Throwable e) {
            collector.getSafeJoin().apply(FastFuture.failedFuture(e));
        }
        return finishNoCollect;
    });
    return cont[0];
}