antonmi
Flowex - Flow-Based Programming framework
Dear alchemists!
I wanna start a topic about Flowex library here!
Flowex is a Flow-Based Programming framework for Elixir.
If you have never heard about the library I would recommend you read the library Readme and this post on Medium.
If you are familiar with Flowex check the latest version, the library has been improved significantly since the first release.
Recently I’ve published post Flow-Based REST API with Flowex and Plug which has an example of designing approach with FBP paradigm and benchmarks that shed some light on Elixir GenStage performance.
So, check it out, share your thoughts and ask questions.
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OvermindDL1
I’m curious, if there can only be one error_pipe :error_handler and its order does not matter, why not add it as an option to use Flowex.Pipeline like use Flowex.Pipeline error_pipe: :error_handler or even as a full argument to make it more explicit?
Cool design overall!
antonmi
antonmi
Hi, @synthslave!
Your analogy is very interesting. I can imagine two ways of using Flowex that can be interpreted in musician way):
- There are several pipelines, one for each instrument. IPs (informational packets) are the notes. You pass the notes to these pipelines and they are played in parallel.
- There is one pipeline where each component is a note. And each component consists of several processes. IPs are the instruments. You pass the instruments into to pipeline and enjoy music.
It sounds cool, but the main problem in both cases - how to synchronize all the instruments. BEAM VM under the hood does not evaluate all the processes in parallel, but frequently switch between them. You can’t be sure that all the notes are played simultaniously. So, in both cases, you need a mechanism of synchronization.
The good news is that a real program is not a music and it is ok if some parts are not synced well.
And I agree with you that FBP is very convienient approach to right software.
Thank you!
Last Post!
antonmi
Hi @synthslave!
Thanks for the information.
Yeap, know about J Paul Morrison and have read his excellent book “Flow-Based Programming”, but haven’t communicated with him.
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