timcharper / acked-stream Goto Github PK

Hi!

I often find myself with the same dilemma of ack external systems, like Kafka/rabbit etc, and no one seems to talk about that in the streams docs/articles I read, ever.

Have you continued with this approach? Or have you found another more "popular" one? (for example, bidi flows, which are mentioned in the readme seem also to be a very good option.)

I see there's a nacked message that extends exception. Curious if this implies that asynchronous operations resulting in a failed future would cause a nack? Alternatively is there any way to conditionally cause an element to be nacked?

thought I might be able to do it quickly but it seems one has to understand how to reimplement it with the GraphStage.

Hello, We are evaluating this library for potential use in our software project and noticed that there does not appear to be an equivalent to a flow/source.flatMapConcat. Is there any particular constraint that prevents this from existing?

Also, to your knowledge, has this library been use in any production systems?

Thanks 😄

First, this is a really cool project. Bumped into this through op-rabbit, which is also very cool. I really needed a "late-ack" approach like you're taking here for process durability.

I think I get where you're going... for now you're using a Promise as a control structure, and because of the way Akka Streams is currently set up you need "Ack" variants of the major pieces to shepherd your control structure from source -> sink.

So my question... (pls forgive me, I'm an Akka Stream noob)...

I see in the graph test you create an AckedFlowGraph. The signature is a mystery to me. You pass in 2 params that appear to be Sinks, and in the code I see it's wired for 2. Any significance to 2? One good, one bad outcome possibly? The original Akka code has a whole bunch of n-variants so I'm guessing you opted not to provide all those until/unless the need arose?

I really hope some mechanism like this is considered for Akka Streams natively, and until then I look forward to your future evolutions of this lib. The Bidi thing looks interesting.

Hi there !

Are you planning to revive the AckedBroadcast component , aligned with new akka-streams release ?
Thanks !