Example usage for com.google.common.util.concurrent ListenableFuture ListenableFuture

Introduction

In this page you can find the example usage for com.google.common.util.concurrent ListenableFuture ListenableFuture.

Prototype

ListenableFuture

Source Link

Usage

From source file:bio.gcat.batch.Batch.java

public ListenableFuture<Result> execute(Collection<Tuple> tuples) {
    final Result result = new Result(tuples);
    Queue<Action> queue = new LinkedList<>(actions);
    if (queue.isEmpty())
        return new DefiniteListenableFuture<>(result);

    Action action;//from w  w  w  . ja v a 2s  .  c  o m
    Future<Collection<Tuple>> future = new DefiniteFuture<>(tuples);
    ListeningExecutorService service = MoreExecutors.listeningDecorator(Executors.newSingleThreadExecutor());
    while ((action = queue.poll()) != null)
        future = service.submit(InjectionLogger.injectLogger(result, action.new Task(future)));

    final ListenableFuture<Collection<Tuple>> lastFuture = (ListenableFuture<Collection<Tuple>>) future;
    return new ListenableFuture<Result>() {
        @Override
        public boolean isDone() {
            return lastFuture.isDone();
        }

        @Override
        public boolean isCancelled() {
            return lastFuture.isCancelled();
        }

        @Override
        public Result get(long timeout, TimeUnit unit)
                throws InterruptedException, ExecutionException, TimeoutException {
            result.setTuples(lastFuture.get(timeout, unit));
            return result;
        }

        @Override
        public Result get() throws InterruptedException, ExecutionException {
            result.setTuples(lastFuture.get());
            return result;
        }

        @Override
        public boolean cancel(boolean mayInterruptIfRunning) {
            return lastFuture.cancel(mayInterruptIfRunning);
        }

        @Override
        public void addListener(Runnable listener, Executor executor) {
            lastFuture.addListener(listener, executor);
        }
    };
}

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