Phoenix - Speaker Deck

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Phoenix @sasajuric

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concurrency scalability fault tolerance predictable latency distributed systems high availability

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“MVC” router sessions assets real-time communication dev productivity

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Phoenix/Elixir Nginx Redis Sidekick/Resque Cron theerlangelist.com

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OTP Erlang VM (BEAM) Cowboy Elixir Plug Phoenix Ecto

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defmodule Math do def sum(x, y) do x + y end end Math.sum(2, 3)

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m1 = Map.new m2 = Map.put(m1, :x, 1) m3 = Map.put(m2, :y, 2)

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bar(foo(x), y, z) foo(x) |> bar(y, z)

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a |> b |> c c(b(a))

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a |> b |> c

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Map.new |> Map.put(:x, 1) |> Map.put(:y, 2) m1 = Map.new m2 = Map.put(m1, :x, 1) m3 = Map.put(m2, :y, 2)

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defmodule MyRouter do get "/some_path", MyModule, :some_fun end defmodule MyRouter do def route(conn, "GET", "/some_path") do MyModule.some_fun(conn) end end

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defmodule MyRouter do use Phoenix.Router get "/some_path", MyModule, :some_fun end

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scheduler scheduler scheduler scheduler CPU CPU CPU CPU VM

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Plug.Adapters.Cowboy.http( MyServer, [], port: 5454 )

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%Plug.Conn{ remote_ip: {151, 236, 219, 228}, host: "www.example.com", request_path: "/bar/baz", method: "GET", # ... }

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defmodule MyServer do def init(opts), do: opts def call(conn, _opts) do conn |> Plug.Conn.put_resp_header("foo", "bar") |> Plug.Conn.put_resp_cookie("baz", "42") |> Plug.Conn.resp(200, "Hi!") end end

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listener request 1 request 2 request 3 conn |>... conn |>... conn |>...

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defmodule MyServer do use Plug.Builder plug Plug.RequestId plug Plug.Logger plug Plug.Static, at: "/static", from: "/folder" plug MyAuth plug :my_handle def my_handle(conn, opts) do # ... end end

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Endpoint Router Controller View conn Model

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$ mix phoenix.new hello --no-ecto # ... Fetch and install dependencies? [Yn] * running npm install && node node_modules/brunch/bin/brunch build * running mix deps.get We are all set! Run your Phoenix application: $ cd hello $ mix phoenix.server You can also run your app inside IEx (Interactive Elixir) as: $ iex -S mix phoenix.server

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client server join "room:23" send "room:23", "Hello" send "room:23", "Hi" Socket