Rxjava: Maybe.just is not calling onComplete

[mattinger]

If you create a MaybeObservable with Maybe.just("foo"), it is never triggering an onComplete call on the MaybeObserver. Unless i'm missing something, shouldn't Maybe follow the same pattern as Observable? Either:

observer.onSuccess
observer.onComplete

OR

observer.onError

[vanniktech]

AFAIK this is intended. It's either onError | onComplete | onSuccess

[mattinger]

So, it's either a value was loaded, a value was not loaded, or there was an error. corresponding to onSuccess, onComplete and onError, respectively?

Is there documentation for 2.0? That's something i was not able to really find.

[akarnokd]

See its javadoc: https://github.com/ReactiveX/RxJava/blob/2.x/src/main/java/io/reactivex/Maybe.java#L36

[akarnokd]

Flowable: onSubscribe oNext* (onError | onComplete)?
Observable: onSubscribe oNext* (onError | onComplete)?
Single: onSubscribe (onSuccess | onError)?
Completable: onSubscribe (onError | onComplete)?
Maybe: onSubscribe (onSuccess | onError | onComplete)?

Maybe is a hybrid of Single and Completable where only one of the |-ed method is called.

[mattinger]

Thanks. On an unrelated note, any reason why there's no switchIfEmpty on Maybe?

[mattinger]

I suppose you can also close this issue.

[akarnokd]

I had to release RC2 because of a few annoying bugs and Maybe got in partially implemented. RC3 will have all reasonable operators added but you can use the 2.x snapshot right now which does already have switchIfEmpty.

[mattinger]

By the way. Maybe.switchIfEmpty(Single) is semantically a single if you haven't created that function yet. Bit would've a nice addition