rxjs - How to handle progress update using ReactiveX Observables/Subjects? -


i'm writing angular app uses reactivex api handle asynchronous operations. used api before in android project , how simplifies concurrent task handling. there 1 thing i'm not sure how solve in right way.

how update observer ongoing task? task in case take time load/create complex/large object , i'm able return intermediate progress, not object itself. observable can return 1 datatype. therefor know 2 possibilities.

  1. create object has progress field , data field. object can returned observable.onnext(object). progress field update on every onnext, while data field empty until last onnext, set loaded value.

  2. create 2 observables, data observable , progress observable. observer hast subscribe progress observable progress updates , data observable notified when data loaded/created. these can optionally zipped 1 subscription.

i used both techniques, both work, want know if there unified standard, clean way, how solve task. can, of course, completly new one. im open every solution.


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