Combine a list of Observables and wait until all completed

Question

TL;DR How to convert Task.whenAll(List) into RxJava?

My existing code uses Bolts to build up a list of asynchr

Answer 1

You probably looked at the zip operator that works with 2 Observables.

There is also the static method Observable.zip. It has one form which should be useful for you:

zip(java.lang.Iterable<? extends Observable<?>> ws, FuncN<? extends R> zipFunction)

You can check out the javadoc for more.

Answer 2

If you use Project Reactor, you can use Mono.when.

Mono.when(publisher1, publisher2)
.map(i-> {
    System.out.println("everything is done!");
    return i;
}).block()