As Reactive approach has many advantage than another approach like, future, completeablefuture, event kotlin couroutine. doing stream chaining operator will much easy using reactive approach, in this case RxJava. https://medium.com/@gumay.raditya/proper-way-to-use-compose-in-rxjava-f89b9746a5fe

What it has to do with Kotlin, I wonder?

Just using kotlin btw :p

There's no Kotlin in that article

See code example

I’m really wonder what you can do with RX that you can’t do in convenient way with coroutines?

They are completely different things

the beauty of coroutines is that you can do every thing with it, if you want data stream you can achieve it with channels and you have the freedom of having other players beside stream is a big plus

How do you do stream chaining in couroutine, I wonder?

kotlinx.coroutines provides some basic stream (Channel) operators: https://github.com/Kotlin/kotlinx.coroutines/blob/master/core/kotlinx-coroutines-core/src/main/kotlin/kotlinx/coroutines/experimental/channels/Channels.kt#L963 Also, you can check this experimental implementataion of some Rx operators using Coroutines and Channels API https://github.com/JakeWharton/Reagent/blob/master/coroutines/src/main/kotlin/reagent/Observable.kt#L89

@gildor waah. Nice!!