java - How to stop main thread and get possibility to stop all flow in RxJava

Question

I need to stop main thread and get the possibility to stop flow

I use

.subscribe();

The main thread do not stop, but i get the Disposable, which i can use to stop all flow

But when i use

.blockingSubscribe();

It return void, and i cant stop all flowable, but the main thread stopped

I can use

.filter(s -> !stopService.get())

but it seems to get a better way to stop all flowable

1. Is there another way, to stop main thread and get a possibility to stop all flowable?

2. Maybe there is a way to use Disposable and some main thread blocking operator?

question from:https://stackoverflow.com/questions/65934577/how-to-stop-main-thread-and-get-possibility-to-stop-all-flow-in-rxjava

Answer 1

It return void, and i cant stop all flowable

There is no point in returning a Disposable because blockingSubscribe only returns when the flow terminates, thus having a Disposable after and disposing it has no effect.

You could use takeUntil with a PublishProcessor to request a termination while using blockingSubscribe.

var stop = PublishProcessor.create();

// hand the processor to something that would signal it to stop, e.g.,

ForkJoinPool.commonPool().submit(() -> {
    System.out.println("Press ENTER to stop");
    System.in.read();
    stop.onComplete();
    return null; // to get submit(Callable)
});

source
.takeUntil(stop)
.blockingSubscribe();

In general, if you want to block the Java main thread, you'll need an asynchronous signal to get it unblocked.