Elixir - valentine edition

1. Elixir @sasajuric aircloak.com
4. otpornost na pogreške skalabilnost responzivnost
5. Erlang LFE Elixir Erlang VM (BEAM)
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
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/