Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Let's create stateful systems, by Elixir
Search
さっちゃん
August 24, 2019
Programming
1
940
Let's create stateful systems, by Elixir
さっちゃん
August 24, 2019
Tweet
Share
More Decks by さっちゃん
See All by さっちゃん
みんなのオブザーバビリティプラットフォームを作ってるんだがパフォーマンスがやばい #mackerelio #srenext
ne_sachirou
0
1.5k
作ってよかったgraceful shutdownライブラリ #kyotogo
ne_sachirou
0
1.2k
path 依存型って何?
ne_sachirou
0
640
野生の onbording と onbording 設計 #kyototechtalk
ne_sachirou
0
630
メトリックはいかにして見え續ける樣になったか #devio2022
ne_sachirou
0
90
名實一致
ne_sachirou
0
660
まかれるあなとみあ ―Mackerel のしくみを理解する 30 分― @ Hatena Engineer Seminar #16
ne_sachirou
0
3.1k
tacit programming : Point-free, Concatenatives & J
ne_sachirou
0
980
Monitoring Containerized Elixir
ne_sachirou
1
980
Other Decks in Programming
See All in Programming
deno-redisの紹介とJSRパッケージの運用について (toranoana.deno #21)
uki00a
0
150
関数型まつりレポート for JuliaTokai #22
antimon2
0
160
エンジニア向け採用ピッチ資料
inusan
0
160
WindowInsetsだってテストしたい
ryunen344
1
200
コードの90%をAIが書く世界で何が待っているのか / What awaits us in a world where 90% of the code is written by AI
rkaga
47
31k
プロダクト志向ってなんなんだろうね
righttouch
PRO
0
160
Azure AI Foundryではじめてのマルチエージェントワークフロー
seosoft
0
130
GraphRAGの仕組みまるわかり
tosuri13
8
490
Java on Azure で LangGraph!
kohei3110
0
170
Create a website using Spatial Web
akkeylab
0
300
今ならAmazon ECSのサービス間通信をどう選ぶか / Selection of ECS Interservice Communication 2025
tkikuc
20
3.6k
第9回 情シス転職ミートアップ 株式会社IVRy(アイブリー)の紹介
ivry_presentationmaterials
1
240
Featured
See All Featured
RailsConf 2023
tenderlove
30
1.1k
Unsuck your backbone
ammeep
671
58k
Building Better People: How to give real-time feedback that sticks.
wjessup
367
19k
I Don’t Have Time: Getting Over the Fear to Launch Your Podcast
jcasabona
32
2.3k
Understanding Cognitive Biases in Performance Measurement
bluesmoon
29
1.8k
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
34
5.9k
The Cost Of JavaScript in 2023
addyosmani
51
8.5k
Creating an realtime collaboration tool: Agile Flush - .NET Oxford
marcduiker
30
2.1k
Balancing Empowerment & Direction
lara
1
370
Code Reviewing Like a Champion
maltzj
524
40k
Save Time (by Creating Custom Rails Generators)
garrettdimon
PRO
31
1.2k
GitHub's CSS Performance
jonrohan
1031
460k
Transcript
Let's create stateful systems, by Elixir
. 。oO( さっちゃんですよヾ( 〃l _ l) ノ゙☆)
I'll show you a number.
2
Two
Ⅱ
⼆
2 is a number of collison & collaboration.
I & you hot & ice stand up & lie
down inside & outside
stateless & stateful
Function is stateless. f : x -> y e.g. Web
server
Dialogue is stateful. Alice : X. Bob : Y. Alice
: X. Bob : Z. Most of the system is stateful.
Elixir
Elixir is a functional programming language. Functional programming is stateless.
All data of Elixir is immutable. [x, 3, x] = Enum.map([1,2,1], &(&1 + 1)) assert 2 == x // Many lines that don't reassign to `x`. assert 2 == x
Elixir has processes. 29 = Task.async(fn -> 29 end) |>
Task.await
Process has state. agent = Agent.start_link(fn -> 29 end) 29
= Agent.get(agent, &(&1)) Agent.update(agent, &(&1 + 13)) 42 = Agent.get(agent, &(&1))
State should be updated in a transaction. State shold interact
& isolate each other. Accessing to state should be scaled in-out. Server with state should be updated gracefully. Elixir has all of these!
State should be updated in a transaction. (No shared state)
State shold interact & isolate each other. (Application, Supervisor) Accessing to state should be scaled in-out. (GenStage, Task, Register, Erlang cluster) Server with state should be updated gracefully. (Hot code swap)
We can create stateful system easy, by constructing stateless parts.
How we can start Elixir? Let's create some applications. *
Web application with Phoenix. * Slack bot.
Phoenix is a Web application framework that familiar with WebSocket.
https://hexdocs.pm/phoenix/overview.html
React is available (✿ >ヮ ╹ )-♡ Let's create a
realtime interaction ∩ (> ◡ <*)∩ ♡ https://speakerdeck.com/ne_sachirou/phoenix-livereact
Create a Slack bot. https://github.com/BlakeWilliams/Elixir-Slack (Easy, so no topic.)
Installing Elixir. asdf https://asdf-vm.com/ asdf plugin-add erlang asdf install erlang
22.0.7 asdf plugin-add elixir asdf install elixir 1.9.1
Text editor? VSCode with mjmcloug.vscode-elixir works.
Format & lint. InnerCotton https://github.com/ne-sachirou/inner_cotton is a set of standard
development tools. mix cotton.init mix cotton.lint --fix
Docker image (You need Docker :-) Fix major ver.s both
Erlang & Elixir. docker run -it --rm nesachirou/elixir:1.9_erl22
Textbook & document. Official guide : https://elixir-lang.org/ Official document :
https://hexdocs.pm/elixir/Kernel.html Online textbook : https://elixirschool.com/ja/ Textbook : https://tatsu-zine.com/books/programming-elixir-ja
https://speakerdeck.com/ne_sachirou/elixirwan-quan-nili-jie-sita
Advanced resources
Erlang in Anger https://ymotongpoo.github.io/erlang-in-anger/text-ja.pdf You want to read this… before
production.
https://speakerdeck.com/ne_sachirou/sutetohurudeda-gui-mo- akusesufalsearusoft-realtimenagemusabawoeasynitukuru
https://speakerdeck.com/ne_sachirou/elixir-on-containers
https://speakerdeck.com/ne_sachirou/phoenix-at-scale
https://speakerdeck.com/ne_sachirou/ddd-data-driven-development