Gain insights into building scalable backend applications with Elixir, OTP, and Phoenix. Learn about persistent connections via Phoenix Channels, and explore distinct, decoupled application layers.

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

elixir_islands_test.tar.gz

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island-interface

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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

They provide persistent connections between stateful servers and stateful clients

A channel can support bidirectional messages on multiple topics

The client of a channel must be a web browser

Which of the following is NOT true about Phoenix channels?

Which of the following is NOT true about Phoenix channels?

Which of the following is responsible for maintaining the connection between clients and a channel?

Which of the following is responsible for maintaining the connection between clients and a channel?

Establishing bi-directional message exchange over channels

Allowing channels to operate over multiple underlying protocols

Keeping track of the channel to which a given message belongs

Which problem is solved by Phoenix Presence?

Which problem is solved by Phoenix Presence?

A separate channel is needed for each topic

One channel will be able to handle all topics for all clients

We are developing a chat system with clients chatting on multiple topics. Which of the following is the best way to implement this? 

We are developing a chat system with clients chatting on multiple topics. Which of the following is the best way to implement this?

Let's test our understanding of the concepts covered so far.

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

Quiz