Phoenix

LambdaZg Meetup

Transcript

1. Phoenix
   @sasajuric
   

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2. concurrency
   scalability
   fault tolerance
   predictable latency
   distributed systems
   high availability
   

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

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

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5. OTP
   Erlang VM (BEAM)
   Cowboy
   Elixir
   Plug
   Phoenix
   Ecto
   

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

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

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

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9. a |> b |> c
   c(b(a))
   

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10. a
    |> b
    |> c
    

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11. 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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12. 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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13. defmodule MyRouter do
    use Phoenix.Router
    get "/some_path", MyModule, :some_fun
    end
    

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14. scheduler scheduler scheduler scheduler
    CPU CPU CPU CPU
    VM
    

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

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

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

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19. 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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20. Endpoint
    Router
    Controller View
    conn
    Model
    

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21. $ 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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22. client server
    join "room:23"
    send "room:23", "Hello"
    send "room:23", "Hi"
    Socket
    

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23. socket
    channel
    client
    channel
    PubSub
    

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24. PubSub
    server 1
    server 2
    server 3
    

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25. maturity
    CPU bound tasks
    learning curve
    

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26. elixir-lang.org
    Getting started

    Mix & OTP
    www.phoenixframework.org
    

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