Book Image

Go Design Patterns

By : Mario Castro Contreras
Book Image

Go Design Patterns

By: Mario Castro Contreras

Overview of this book

Go is a multi-paradigm programming language that has built-in facilities to create concurrent applications. Design patterns allow developers to efficiently address common problems faced during developing applications. Go Design Patterns will provide readers with a reference point to software design patterns and CSP concurrency design patterns to help them build applications in a more idiomatic, robust, and convenient way in Go. The book starts with a brief introduction to Go programming essentials and quickly moves on to explain the idea behind the creation of design patterns and how they appeared in the 90’s as a common "language" between developers to solve common tasks in object-oriented programming languages. You will then learn how to apply the 23 Gang of Four (GoF) design patterns in Go and also learn about CSP concurrency patterns, the "killer feature" in Go that has helped Google develop software to maintain thousands of servers. With all of this the book will enable you to understand and apply design patterns in an idiomatic way that will produce concise, readable, and maintainable software.
Table of Contents (17 chapters)
Go Design Patterns
About the Author
About the Reviewer
Customer Feedback

Workers pool

One problem we may face with some of the previous approaches to concurrency is their unbounded context. We cannot let an app create  an unlimited amount of Goroutines. Goroutines are light, but the work they perform could be very heavy. A workers pool helps us to solve this problem.


With a pool of workers, we want to bound the amount of Goroutines available so that we have a deeper control of the pool of resources. This is easy to achieve by creating a channel for each worker and having workers with either an idle or busy status. The task can seem daunting, but it's not at all.


Creating a Worker pool is all about resource control: CPU, RAM, time, connections, and so on. The workers pool design pattern helps us to do the following:

  • Control access to shared resources using quotas

  • Create a limited amount of Goroutines per app

  • Provide more parallelism capabilities to other concurrent structures

A pool of pipelines

In the previous chapter, we saw how to work with a...