From Functional Languages to Functional Architectures

Slides of my presentation for Codemotion 2020 (https://events.codemotion.com/conferences/online/2020/codemotion-online-tech-conference/)

Software tends to be organised in a similar way in different levels: methods in classes, classes in packages, packages in projects and so on. The OO approach defined a good amount of this standards. However, there are companies building massive systems out there, handling numerous requests in a functional way. Could the functional approach have any impact on architecture? Lambda functions, immutable databases and short-life infrastructure are a few examples. In this session you will see how the functional paradigm has impacted software architecture at a much deeper level than one can imagine

Transcript

1. From Functional Languages
   to Functional Architectures
   Juliano Alves
   @vonjuliano
   juliano-alves.com
   October 20-21-22, 2020
   

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2. Who am I?
   ● Software Engineer,
   Searcher of perfect modularization,
   Lover of Functional Languages
   ● The cool ones
   Scala, Clojure, Elixir
   ● The "vintage" ones
   Java, C#, Python, Ruby
   @vonjuliano
   juliano-alves.com
   

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4. What is software?
   "Software is representation of
   knowledge"
   

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5. How do we organise that knowledge?
   "Software tends to be organised
   the same way, in different levels"
   

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6. COMPUTATION
   INPUT OUTPUT
   

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7. SERVICE A SERVICE B SERVICE C
   SERVICE D
   SERVICE E
   SERVICE F
   SERVICE G SERVICE H SERVICE I
   

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8. COMPUTATION
   INPUT OUTPUT
   

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9. They behave as Functions.
   

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10. f(x)
    x y
    

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12. Http Server
    http
    request
    http
    response
    

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16. State
    

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20. final var album = new ArrayList();
    album.add(picture1);
    album.add(picture2);
    System.out.println(album);
    // [pic1, pic2]
    album.set(1, picture3);
    System.out.println(album);
    // [pic1, pic3]
    

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21. val album = List[Picture](picture1, picture2)
    println(album)
    // [pic1, pic2]
    album.updated(1, picture3)
    println(album)
    // [pic1, pic2]
    val newAlbum = album.updated(1, picture3)
    println(newAlbum)
    // [pic1, pic3]
    

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22. State in environment
    

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26. https://www.thoughtworks.com/insights/articles/understanding-clouds-significance
    

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27. State in applications
    

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29. SpaceTimeContinuumException
    

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31. https://www.confluent.io/blog/build-streaming-etl-solutions-with-kafka-and-rail-data/
    

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32. TOPOLOGY
    

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33. Conclusion
    

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34. "The way one express themselves
    affects their worldview."
    Sapir–Whorf hypothesis:
    https://en.wikipedia.org/wiki/Linguistic_relativity
    

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35. From Functional Languages
    to Functional Architectures
    Juliano Alves
    @vonjuliano
    juliano-alves.com
    October 20-21-22, 2020
    Thank you!
    

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