Elixir for busy Javadevs

Transcript

1. #Devoxx #AwesomeElixir @koenighotze Bootstrap |> Elixir EASY FUN FOR BUSY DEVELOPERS
2. #Devoxx #AwesomeElixir @koenighotze @koenighotze / David Schmitz Senacor Technologies Programmer! That’s me, learning Scala
3. #Devoxx #AwesomeElixir @koenighotze WET YOUR APPETITE FOR ELIXIR SHOW OFF SOME COOL FEATURES CODE A DISTRIBUTED PIZZA PARLOUR
4. #Devoxx #AwesomeElixir @koenighotze 学⼀一⻔门语⾔言，就是多⼀一个观察世界的窗户。 To learn a language is to have one more window from which to look at the world
5. #Devoxx #AwesomeElixir @koenighotze Two minor caveats
6. #Devoxx #AwesomeElixir @koenighotze I AM THE JON SNOW OF ELIXIR AND ERLANG/OTP
7. #Devoxx #AwesomeElixir @koenighotze THIS IS NOT A README!
8. #Devoxx #AwesomeElixir @koenighotze YET ANOTHER PROGRAMMING LANGUANGE? Y A P L
9. #Devoxx #AwesomeElixir @koenighotze Elixir in a Nutshell + Elixir in a Nutshell +
10. #Devoxx #AwesomeElixir @koenighotze
11. #Devoxx #AwesomeElixir @koenighotze
12. #Devoxx #AwesomeElixir @koenighotze
13. #Devoxx #AwesomeElixir @koenighotze WHY NOT JUST USE RUBY, ERLANG OR CLOJURE?
14. #Devoxx #AwesomeElixir @koenighotze It didn't take long, but pretty soon my gut feeling kicked in. This is good $hit. …, they both compile to instructions for the EVM - Joe Armstrong (Creator of Erlang)
15. #Devoxx #AwesomeElixir @koenighotze Programmer focussed OTP Power + Ruby Love Functional but pragmatic Standard Toolset Why Elixir is awesome
16. #Devoxx #AwesomeElixir @koenighotze
17. #Devoxx #AwesomeElixir @koenighotze Erlang/OTP ERLANG/BEAM TOOLS LIBRARIES PATTERNS
18. #Devoxx #AwesomeElixir @koenighotze Elixir ERLANG/BEAM TOOLS LIBRARIES PATTERNS
19. #Devoxx #AwesomeElixir @koenighotze Pizza Parlour - Version 1 “Take my money! I want a salami pizza!” “I am hungry!!” “3 €, please!”
20. #Devoxx #AwesomeElixir @koenighotze Pizza Parlour - Version 1 Demo
21. #Devoxx #AwesomeElixir @koenighotze WHAT ABOUT 99.9999999?
22. #Devoxx #AwesomeElixir @koenighotze Pillars of Resilience and Reliability Message-passing between isolated processes Automatic recovery and monitoring Transparent distribution
23. #Devoxx #AwesomeElixir @koenighotze Elixir Power Tools Messaging with GenServer modules Supervisor for transparent resilience
24. #Devoxx #AwesomeElixir @koenighotze Shared resources Shared state Shared stability SHARED STATE COMPUTATION COMPUTATION COMPUTATION HEAVY WEIGHT PROCESS COMPUTATION COMPUTATION COMPUTATION
25. #Devoxx #AwesomeElixir @koenighotze Light Weight Processes MAILBOX STATE COMPUTATION Asynchronous Synchronous GENSERVER
26. #Devoxx #AwesomeElixir @koenighotze GenericServer in a Nutshell loop(current_state): wait for message handle message send reply loop(new_state)
27. #Devoxx #AwesomeElixir @koenighotze GenericServer in a Nutshell loop(current_state): wait for message handle message send reply loop(new_state)
28. #Devoxx #AwesomeElixir @koenighotze GenericServer in a Nutshell loop(current_state): wait for message handle message send reply loop(new_state)
29. #Devoxx #AwesomeElixir @koenighotze GenericServer in a Nutshell loop(current_state): wait for message handle message send reply loop(new_state)
30. #Devoxx #AwesomeElixir @koenighotze Architecture build around tiny Processes PROCESS PROCESS PROCESS PROCESS PROCESS PROCESS PROCESS PROCESS PROCESS PROCESS PROCESS HEAVY WEIGHT PROCESS
31. #Devoxx #AwesomeElixir @koenighotze Message driven Pizza - The request {:pizza, “Salami”} handle_call({:pizza, “Salami”}, from, state)
32. #Devoxx #AwesomeElixir @koenighotze %{order_number: 123, price: 10.50} Message driven Pizza - The reply
33. #Devoxx #AwesomeElixir @koenighotze Pizza Parlour - Version 2 Demo
34. #Devoxx #AwesomeElixir @koenighotze NOW REALLY, WHAT ABOUT RESILIENCE???
35. #Devoxx #AwesomeElixir @koenighotze “HAVE YOU TRIED TURNING IT OFF AND ON AGAIN?”
36. #Devoxx #AwesomeElixir @koenighotze The WHAT IF scenario {:pizza, “Salami”}
37. #Devoxx #AwesomeElixir @koenighotze Risk at the Bottom of the Supervision Tree APPLICATION SUPERVISOR Here be dragons…
38. #Devoxx #AwesomeElixir @koenighotze APPLICATION SUPERVISOR Supervisors watch their Children
39. #Devoxx #AwesomeElixir @koenighotze APPLICATION SUPERVISOR Supervisors watch their Children
40. #Devoxx #AwesomeElixir @koenighotze APPLICATION SUPERVISOR Supervisors watch their Children
41. #Devoxx #AwesomeElixir @koenighotze Pizza Parlour - Version 3 Demo
42. #Devoxx #AwesomeElixir @koenighotze There is so much more
43. #Devoxx #AwesomeElixir @koenighotze Protocols for polymorphism defimpl String.Chars do def to_string(bitmap), for: [Bitmap] do … end end
44. #Devoxx #AwesomeElixir @koenighotze Hygienic Macros defmacro unless(clause, do:expression) do quote do if(!unquote(clause) do unquote(expression)) end end end
45. #Devoxx #AwesomeElixir @koenighotze Hygienic Macros defmacro unless(clause, do:expression) do quote do if(!unquote(clause) do unquote(expression)) end end end
46. #Devoxx #AwesomeElixir @koenighotze Zero downtime Hot code replacement def code_change(ver, old_state, extra) do new_state = … {:ok, new_state} end
47. #Devoxx #AwesomeElixir @koenighotze Real-time apps with Ecto and Phoenix defmodule Video do def alphabetical(query) do from q in query, order_by: q.name end end
48. #Devoxx #AwesomeElixir @koenighotze Real-time apps with Ecto and Phoenix def alphabetical(query) do … Video |> Video.alphabetical |> Repo.all
49. #Devoxx #AwesomeElixir @koenighotze SHOULD WE ALL START BUILDING EVERYTHING WITH ELIXIR?
50. #Devoxx #AwesomeElixir @koenighotze
51. #Devoxx #AwesomeElixir @koenighotze WELL….MAYBE NOT?!
52. #Devoxx #AwesomeElixir @koenighotze AND OF COURSE…
53. #Devoxx #AwesomeElixir @koenighotze MICROSERVICE AND CLOUD READY ;)
54. #Devoxx #AwesomeElixir @koenighotze New insights and ideas Clean patterns as part of the core Architecture and Tooling for IoT Vibrant and friendly Community Come for OTP, stay for…
55. #Devoxx #AwesomeElixir @koenighotze Elixir Homepage, http://elixir-lang.org/ Dave Thomas, Programming Elixir Fred Hebert, Stuff Goes Bad: Erlang in Anger Do you want to know more?
56. #Devoxx #AwesomeElixir @koenighotze Thank you very much! <david.schmitz@senacor.com>