Book Image

Go Programming Cookbook - Second Edition

By : Aaron Torres
Book Image

Go Programming Cookbook - Second Edition

By: Aaron Torres

Overview of this book

Go (or Golang) is a statically typed programming language developed at Google. Known for its vast standard library, it also provides features such as garbage collection, type safety, dynamic-typing capabilities, and additional built-in types. This book will serve as a reference while implementing Go features to build your own applications. This Go cookbook helps you put into practice the advanced concepts and libraries that Golang offers. The recipes in the book follow best practices such as documentation, testing, and vendoring with Go modules, as well as performing clean abstractions using interfaces. You'll learn how code works and the common pitfalls to watch out for. The book covers basic type and error handling, and then moves on to explore applications, such as websites, command-line tools, and filesystems, that interact with users. You'll even get to grips with parallelism, distributed systems, and performance tuning. By the end of the book, you'll be able to use open source code and concepts in Go programming to build enterprise-class applications without any hassle.
Table of Contents (16 chapters)

Using the worker pool design pattern

The worker pool design pattern is one where you dispatch long-running Goroutines as workers. These workers can process a variety of work either using multiple channels, or by using a stateful request structure that specifies the type, as described in the preceding recipe. This recipe will create stateful workers and demonstrate how to coordinate and spin up multiple workers who are all handling requests concurrently on the same channel. These workers will be crypto workers, as in a web authentication application. Their purpose will be to hash plaintext strings using the bcrypt package and compare a text password against a hash.

How to do it...

These steps cover writing and running your application:

  1. From your Terminal or console application,createa new directory called~/projects/go-programming-cookbook/chapter10/pooland navigate to it.
  2. Run the following command:
          $ go mod...