Gain insights into building fast, resource-efficient real-time applications using Elixir and Phoenix. Delve into websockets, GenStage, Phoenix Tracker, and production deployment practices for seamless user experiences.

_Real-Time Phoenix by The Pragmatic Programmer_ .png

Phoenix.tar.gz

Start in terminal

Direct start

Start in terminal with new deps

sneakers_initial

sneakers

sneakers-chromedriver

sneakers cart initial

sneakers cart

sneakers admin initial

sneakers admin

memory initial

observer

live view

react example

sneakers observer

sneakers observer-copy

Tracker

In this course, you will learn how to build real-time applications that will be fast with less resource overhead. Today’s software users expect the data on their screens to reflect instantly. You will win your users’ trust by giving them a seamless application experience powered by real-time features.

This course is broken up into three parts. In Part 1, you will focus on the essential part of the real-time stack (Elixir, - Phoenix channels, websockets, and GenStage). This will set the foundation for building real-time applications.

In Part 2, you will add features to an e-commerce application that serves many users simultaneously. You will also get to work with some of the more advanced features of Phoenix, such as Phoenix Tracker.

In Part 3, you will finish the course with guidance on running real-time applications in production. The battle is only beginning when you write an application. You have to then keep it healthy and happy in production.

Building Real-time Applications with Phoenix & Elixir

# Fully functional shopping cart
We’ve built a fully functioning shopping cart using the tools we’ve covered throughout this course. We had to flex all of our Channel and real-time system skills to build this relatively complex feature. We used the basic `handle_in` and `handle_out` features in Phoenix Channels to take client commands and send data to the clients. We leveraged PubSub with dynamic subscriptions to track when an item goes out of stock. We made our system work across distributed servers by using an order of operations in our inventory updates that provides our shoppers with a consistent view of their cart.

Let's highlight the main contents of this chapter.

Wrapping Up

Getting Started with Phoenix

Powering Real-time Applications with Phoenix

First Steps with Phoenix Channels

Restrict Socket and Channel Access

Dive Deep into Phoenix Channels

Avoid Performance Pitfalls

Build a Real-time Sneaker Store

Break Your Application with Acceptance Tests

Build a Real-time Shopping Cart

Track Connected Carts with Presence

Deploy Our Application to Production

Manage Real-time Resources

Hands-on with Phoenix LiveView

Single-page Applications with React

Wrap Up!

Appendix

Wrapping Up

Fully functional shopping cart