RxJava2: parallel(): Want to know if at least one rail completes (conversion to Maybe)

[Johannes Schneider]

Hi guys,

I want to download a file from several possible locations. Each location has three possible results:

- error (e.g. a timeout, 404)

- success with a new file (200)

- not modified (304)

My (pseudo) code so far:

Flowable.just(url1, url2...)

.parallel()

.runOn(Schedulers.computation())

.map( ...http download ) 

.filter( ... status code == 200 )

.map( ... parse content ...)

.reduce( ..find newest file..)

My problem: I can not differentiate between errors and not modified.

What I would like as result:

A Maybe<File> that gives me the following calls:

- onError: if *all* urls have failed

- onNext: if at least one url has returned 200

- onComplete: if at least one url has *not* returned an error

Is this possible?

Thanks,

Johannes