Learn web development with Elixir. We use GenServer Behaviour for a stateful backend. The front-end will use Phoenix Channels to communicate with the backend.

Functional Web Development with  Elixir, OTP and Phoenix by The Pragmatic Programmer_ .png

elixir_islands_test.tar.gz

elixir-app

pheonix-app

elixir-app-guesses

island-interface

phoenix-app-compiled

phoenix-app-iex

phoenix-app-form

phoenix-app-new-module

client-connection

presence

phoenix-app-final

without-presence

Elixir and OTP provide exceptional tools to build rock-solid backend applications that scale. In this course, you’ll build a web application in a radically different way, with a backend that holds application state. You’ll use persistent Phoenix Channel connections instead of HTTP’s request-response, and create the full application in distinct, decoupled layers.

In Part 1, you’ll start by building the business logic as a separate application, without Phoenix. You’ll model the application domain with Elixir functions and simple data structures.

In Part 2, you’ll add in the GenServer Behaviour to make managing in-memory state a breeze. 

In Part 3, you’ll build a web interface with Phoenix where you’ll use Phoenix Channels to establish persistent connections between the stateful server and a stateful front-end client.

Needless to say, you’re going to love this way of building web apps!

Functional Web Development with Elixir, OTP and Phoenix

## Channel module

The first thing we need is a Channel module. Let’s get one started at `islands_interface/lib/islands_interface_web/channels/game_channel.ex`:
```Elixir
defmodule IslandsInterfaceWeb.GameChannel do
  use IslandsInterfaceWeb, :channel

  alias IslandsEngine.{Game, GameSupervisor}
```

# Channel module

The first thing we need is a Channel module. Let’s get one started at `islands_interface/lib/islands_interface_web/channels/game_channel.ex`:
```Elixir
defmodule IslandsInterfaceWeb.GameChannel do
  use IslandsInterfaceWeb, :channel

  alias IslandsEngine.{Game, GameSupervisor}
```

Let's define a new module in the game code.

Introduction

Mapping Our Route

Model Data and Behavior

Working of State Machines

Add OTP for Concurrency and Fault Tolerance

Process Supervision for Recovery

Generate a New Web Interface with Phoenix

Create Persistent Connections with Phoenix Channels

Appendix

Define a New Module

Channel module