Tutorial #10 | Reactive streams: map vs flatMap vs concatMap vs flatMapSequential | Engineer

#ReactiveProgramming #FLux #Mono #FlatmapOperator #TransformingReactiveStream #Engineer
In this video, I have talked about the Reactive Stream operators. We have operators like filter, map, flatMap, concat, merge and zip for Reactive Streams. This video is about flatMap operator using which we can transform a reactive stream. I have also explained the differences between flatMap, concatMap and flatMapSequential with hands-on example.
I hope this video will also help you to understand the basic difference between map and flatMap operator.
Stay tuned.....
Happy Coding :)
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[@bobyrasta100]

This is the best tutorial on this topic on youtube.. till date. Thanks young man, job well done.

[@Engineerhoon]

Thanks for those kind words. It means a lot.

[@annapureddyravi4054]

Very nice bro

[@Engineerhoon]

Thank you 😊

[@RajeshSamson]

Superb explanation...... No more words just Subscribe

[@Telugunela]

Excellent Explanation. Subscribed after this. Thanks

[@Engineerhoon]

Thanks!!

[@belliraj1]

good tutorial

[@Engineerhoon]

Glad it helped! Please share this video so that it can reach to those who need it. Thanks.

[@avinash-tripathy]

Great content!!! Could you tell me how you have enabled that suggestions which you have it at the end of each line(Flux)??

[@Engineerhoon]

You can try enabling show hints from preferences.

[@amizan8653]

Is there any reason to use concatMap over flatMapSequential? I'm failing to see why you'd want to use concatMap unless you *want* the performance hit for some reason.

[@Engineerhoon]

If you want the order to be maintained then go for concatMap.

[@h.mantri]

Does flatmap spawn a new thread?

[@Engineerhoon]

No. Reactor operators generally are concurrent agnostic: they don’t impose a particular threading model and just run on the Thread on which their onNext method was invoked.

[@h.mantri]

@@Engineerhoon Is there a way I can make a flatmap/map run on separate thread? Why is the term 'asynchronous' mentioned in the Java doc of flatmap?

[@Engineerhoon]

Yes, using Reactive Schedulers. Watch this videos kzbin.info/www/bejne/e2jZgJt-j9Cbe5Y

[@mubarakabbas]

Can i print inside the flatmap

[@Engineerhoon]

You can but in that case output from your flatmap would be void/unit. Usually you should use reactive log method in the chain after flatmap.

[@mubarakabbas]

@@Engineerhoon somehow it didnt work,

[@Engineerhoon]

@@mubarakabbas Can you push it to github and share link?