I am currently working with Akka Stream Kafka to interact with kafka and I was wonderings what were the differences with Kafka Streams.
I know that the Akka based approach implements the reactive specifications and handles back-pressure, functionality that kafka streams seems to be lacking.
What would be the advantage of using kafka streams over akka streams kafka?
Your question is very general, so I'll give a general answer from my point of view.
First, I've got two usage scenario:
This already allows me to answer the part about back-pressure: for the 1st scenario above, there is a back-pressure mechanism in kafka streams.
Let's now only focus on the first scenario described above. Let's see what I would loose if I decided to stop using Kafka streams:
Those are the biggest differences that matter to me, I'm hoping that it makes sense to you!
The big advantage of Akka Stream over Kafka Streams would be the possibility to implement very complex processing graphs that can be cyclic with fan in/out and feedback loop. Kafka streams only allows acyclic graph if I am not wrong. It would be very complicated to implement cyclic processing graph on top of Kafka streams
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