「ElixirがリアルタイムWebに強い」 というのは本当か?

Elixir Conf Japan 2017

Transcript

1. ʮElixir͕ϦΞϧλΠϜWebʹڧ͍ʯ ͱ͍͏ͷ͸ຊ౰͔ʁ Elixir Conf Japan 2017
2. ࣗݾ঺հ Twitter: @mururururu Github: @mururu
 
 The Original Author: StringIO, ExUnit.CaptureIO
3. ʮElixir͕ϦΞϧλΠϜWebʹڧ͍ʯ ͱ͍͏ͷ͸ຊ౰͔ʁ
4. “ϦΞϧλΠϜɾ΢ΣϒʢReal-time webʣ͸ɺ Πϯλʔωοτ্ͷϢʔβʔͷॻ͖ࠐΈ΍ಈ޲ Λɺଈ͔࣌ͭେن໛ʹଞͷϢʔβʔͱڞ༗͢Δ ࢓૊Έͷ૯শɻ” - Wikipedia
5. Node.js, Socket.IO
6. • ϩϯάϙʔϦϯά • SSE • WebSocket
7. • ίωΫγϣϯͷҡ࣋ • ૒ํ޲௨৴ • ௿஗Ԇ WebSocket $MJFOU $MJFOU Server $MJFOU
8. • େྔͷίωΫγϣϯͷҡ࣋(c10k, c100k?) • ԟʑʹͯ͠εςʔτϑϧ • ௿஗Ԇ • ଱ো֐ੑ ՝୊
9. BEAM - ErlangVM
10. ܰྔϓϩηε
11. ܰྔϓϩηε • N:MεϨουϞσϧ • minimum 309 words • ϝοηʔδύογϯά • Shared nothing • ܰྔϓϩηε͝ͱͷGC • ϓϦΤϯϓςΟϒͳεέʔδϡʔϦϯά 1 spawn fn -> 1 + 2 end spawn fn -> loop() end spawn dead
12. ܰྔϓϩηε • N:MεϨουϞσϧ • minimum 309 words • ϝοηʔδύογϯά • Shared nothing • ܰྔϓϩηε͝ͱͷGC • ϓϦΤϯϓςΟϒͳεέʔδϡʔϦϯά 1 1 1 04
    5ISFBE 04
    5ISFBE
13. ܰྔϓϩηε • N:MεϨουϞσϧ • minimum 309 words • ϝοηʔδύογϯά • Shared nothing • ܰྔϓϩηε͝ͱͷGC • ϓϦΤϯϓςΟϒͳεέʔδϡʔϦϯά 1 309 words
14. • N:MεϨουϞσϧ • minimum 309 words • ϝοηʔδύογϯά • Shared nothing • ܰྔϓϩηε͝ͱͷGC • ϓϦΤϯϓςΟϒͳεέʔδϡʔϦϯά ܰྔϓϩηε 1 1 receive do {:get, key, caller} -> send caller, find(key) end
15. ܰྔϓϩηε • N:MεϨουϞσϧ • minimum 309 words • ϝοηʔδύογϯά • Shared nothing • ܰྔϓϩηε͝ͱͷGC • ϓϦΤϯϓςΟϒͳεέʔδϡʔϦϯά 1 1 Copy
16. ܰྔϓϩηε • N:MεϨουϞσϧ • minimum 309 words • ϝοηʔδύογϯά • Shared nothing • ܰྔϓϩηε͝ͱͷGC • ϓϦΤϯϓςΟϒͳεέʔδϡʔϦϯά 1 1 04
    5ISFBE resume stopped
17. • େྔͷίωΫγϣϯͷҡ࣋(c10k, c100k?) • ԟʑʹͯ͠εςʔτϑϧ • ௿஗Ԇ • ଱ো֐ੑ ՝୊
18. େมͦ͏
19. Phoenix Channel
20. Phoenix Channel • ιϑτϦΞϧλΠϜͳ ʢWebʣΞϓϦέʔ γϣϯΛ༰қʹ࣮ݱ͢ΔϑϨʔϜϫʔΫ • ϓϥΨϒϧͳτϥϯεϙʔτ • ϓϥΨϒϧͳ PubSub όοΫΤϯυ
21. Phoenix Channel • Phoenix.Socket • ΫϥΠΞϯτ͔Βͷड͚ޱ • Phoenix.Channel • τϐοΫ୯Ґͷνϟϯωϧͷ PubSub
22. Phoenix.Socket defmodule HelloPhoenix.UserSocket do use Phoenix.Socket channel "room:*", HelloPhoenix.RoomChannel def connect(_params, socket) do {:ok, socket} end def id(_socket), do: nil end ग़య: http://www.phoenixframework.org/docs/channels
23. Phoenix.Channel defmodule HelloPhoenix.RoomChannel do use Phoenix.Channel def join("room:lobby", _message, socket) do {:ok, socket} end def join("room:" <> _private_room_id, _params, _socket) do {:error, %{reason: "unauthorized"}} end def handle_in("new_msg", %{"body" => body}, socket) do broadcast! socket, "new_msg", %{body: body} {:noreply, socket} end end ग़య: http://www.phoenixframework.org/docs/channels
24. $MJFOU gen_tcp, ranch, cowboy Phoenix.Socket ->
 Phoenix.Transports.WebSocket Phoenix.Channel -> Phoenix.Channel.Server Phoenix.PubSub.PG2 $MJFOU gen_tcp, ranch, cowboy Phoenix.Socket ->
 Phoenix.Transports.WebSocket Phoenix.Channel -> Phoenix.Channel.Server x topics x topics
25. σϞ used: https://github.com/ koudelka/visualixir
26. ·ͱΊ • ϦΞϧλΠϜWebʹ͓͚Δ՝୊ • ܰྔϓϩηε • ͦΕΛ༰қʹར༻Ͱ͖Δ Phenix Channel
27. ʮElixir͕ϦΞϧλΠϜWebʹڧ͍ʯ ͱ͍͏ͷ͸ຊ౰͔ʁ Elixir Conf Japan 2017