设置超时直到Observable的数据完成

Question

There is a rx.Observable.timeout but it's per item and not for all data. But I need a timeoutexception if data is not emitted within specific period of time.

final Subscriber<Integer> sub = new Subscriber<Integer>() {
            @Override
            public void onNext(Integer num) {


                try {
                    Thread.sleep(100);
                } catch (InterruptedException e) {}
                System.out.println(num);
            }

            @Override
            public void onCompleted() {
                System.out.println("--------------- Done ---------------");
            }

            @Override
            public void onError(Throwable e) {
                //System.out.println("Error!!! + e");
            }
        };

        Observable.range(1, 10000)
        .map(x -> x * 10)
        //.last()
        .timeout(10, TimeUnit.SECONDS)
        .doOnError( e -> {System.out.println("Errrorrr " + e);})
        .subscribe(sub);

Answer 1

You could use takeUntil(Observable) with timer() mapped into an exception:

source.takeUntil(
    Observable.timer(10, TimeUnit.SECONDS)
    .flatMap(ignored -> Observable.error(new TimeoutException()))
)
.subscribe(/* ... */);

Answer 2

Use two sources: one emitting your data, one throwing your timeout exception after a delay. Merge the two:

Observable timeoutObservable = Observable.error(new TimeoutException())
    .delay(10, TimeUnit.SECONDS, true);
return Observable.merge(dataObservable, timoutObservable);