Log flux until mono completes - project-reactor

Question

I have the following:
Flux<String> flux = ...
Mono<Void> mono = ...
Mono<Void> combined = operation(flux, mono);
They represent operations happening in parallel.
Now, I would like to print all elements emitted by the flux to sysout until mono completes,
what's the right operator to use here?
I've tried :
final Disposable subscribe = flux.subscribe(System.out::println);
mono.doOnSuccessOrError((o, e) -> subscribe.dispose());
But if feels clumpsy, I have a feeling there might be a better way to do this. Is there?

Answer 1

So, Project Reactor provides some methods to log emitted results:
doOnNext(Consumer onNext)
subscribe(Consumer consumer)
log()
You can see how it works.
Code example:
Flux<String> stringFlux = Flux.just("one", "two", "three")
.doOnNext(s -> System.out.println("On next: " + s));
Mono<String> stringMono = Mono.just("four");
stringFlux = stringFlux.concatWith(stringMono)
.map(s -> s + " hundred")
.log();
stringFlux.subscribe(s -> System.out.println("On next subscriber: " + s));
Result:
15:32:18.984 [main] INFO reactor.Flux.Map.1 - onSubscribe(FluxMap.MapSubscriber)
15:32:18.986 [main] INFO reactor.Flux.Map.1 - request(unbounded)
On next: one
15:32:19.005 [main] INFO reactor.Flux.Map.1 - onNext(one hundred)
On next subscriber: one hundred
On next: two
15:32:19.005 [main] INFO reactor.Flux.Map.1 - onNext(two hundred)
On next subscriber: two hundred
On next: three
15:32:19.005 [main] INFO reactor.Flux.Map.1 - onNext(three hundred)
On next subscriber: three hundred
15:32:19.006 [main] INFO reactor.Flux.Map.1 - onNext(four hundred)
On next subscriber: four hundred
15:32:19.007 [main] INFO reactor.Flux.Map.1 - onComplete()
First message has been written from doOnNext of stringFlux, after that log of combined Publishers and the last is subscribe.
P.S. Also you can log other events like OnError, OnComplete and etc.