Book Image

Rust Web Programming - Second Edition

By : Maxwell Flitton
Book Image

Rust Web Programming - Second Edition

By: Maxwell Flitton

Overview of this book

Are safety and high performance a big concern for you while developing web applications? With this practical Rust book, you’ll discover how you can implement Rust on the web to achieve the desired performance and security as you learn techniques and tooling to build fully operational web apps. In this second edition, you’ll get hands-on with implementing emerging Rust web frameworks, including Actix, Rocket, and Hyper. It also features HTTPS configuration on AWS when deploying a web application and introduces you to Terraform for automating the building of web infrastructure on AWS. What’s more, this edition also covers advanced async topics. Built on the Tokio async runtime, this explores TCP and framing, implementing async systems with the actor framework, and queuing tasks on Redis to be consumed by a number of worker nodes. Finally, you’ll go over best practices for packaging Rust servers in distroless Rust Docker images with database drivers, so your servers are a total size of 50Mb each. By the end of this book, you’ll have confidence in your skills to build robust, functional, and scalable web applications from scratch.
Table of Contents (27 chapters)
Free Chapter
Part 1:Getting Started with Rust Web Development
Part 2:Processing Data and Managing Displays
Part 3:Data Persistence
Part 4:Testing and Deployment
Part 5:Making Our Projects Flexible
Part 6:Exploring Protocol Programming and Async Concepts with Low-Level Network Applications

Keeping track of orders with actors

When it comes to keeping track of our orders, we could simply add a HashMap to our order book and add a couple of other messages that can be sent to the order book actor. This is one approach. We are getting into territory where there are no clear correct approaches, and people within the community debate on the best approaches to solve problems. In this chapter, we will get used to creating actors and managing multiple actors in Tokio by creating two new actors. One actor will merely keep track of our stock purchases, while the other actor will send messages to the order tracker to get the state of our orders.

First, we need to create a separate file in src/ In this file, we initially need to import what we need to handle the collection of stocks and the channels that enable the connections between the actors:

use tokio::sync::{mpsc, oneshot};
use std::collections::HashMap;

Then, we need to create the message struct for...