Elixir - valentine edition

Transcript

1. Elixir @sasajuric aircloak.com

2. None
3. None

4. otpornost na pogreške skalabilnost responzivnost

5. Erlang LFE Elixir Erlang VM (BEAM)

6. None

7. v1 = f1(p1, p2, ...) v2 = f2(...) ...

8. spawn(fn -> ... end) A B

9. OS proces BEAM proces

10. scheduler scheduler scheduler scheduler BEAM instanca CPU CPU CPU CPU

11. pid = spawn(fn -> ... end)

12. pid = spawn(fn -> ... end) send(pid, :ping)

13. spawn(fn -> receive do :ping -> # ... end end)

14. send(pid, {:ping, self()})

15. spawn(fn -> receive do {:ping, caller_pid} -> send(caller_pid, :pong) end

    end)

16. send(pid, {:ping, self()}) receive do :pong -> # ... after

    :timer.seconds(5) -> # ... end

17. pid = spawn(fn -> server_loop(state) end)

18. defp server_loop(state) do receive do message -> new_state = handle(state,

    message) server_loop(new_state) end end

19. bank account balance

20. send(pid, {:deposit, 100}) send(pid, {:withdraw, 100}) send(pid, {:balance, self()}) receive

    do balance -> # ... end

21. spawn(fn -> bank_account_loop(0) end)

22. def bank_account_loop(balance) do receive do {:deposit, amount} -> bank_account_loop(balance +

    amount) {:withdraw, amount} -> bank_account_loop(balance - amount) {:balance, caller_pid} -> send(caller_pid, balance) bank_account_loop(balance) end end

23. bank account {:deposit, amount} {:withdraw, amount} :balance

24. None

25. db connection background job request handler state request handler request

    handler request handler request handler request handler state state state background job background job background job db connection db connection db connection

26. A B C D E F

27. A exit notifikacija B C D E F

28. S S S W W S W W W S

    W W

29. VM VM VM VM VM

30. VM send(pid, message) VM 1 send(pid, message) VM 2

31. elixir-lang.org phoenixframework.org adventofcode.com exercism.io elixirforum.com meetup.com/lambdazagreb/