The initial folder structure looks as follows:įor this concurrent implementation, we have created two channels, usersCh will hold the initial list of users and unvisitedUsers will hold individual unvisited users. This package will have a method called ProcessFile which will be called from the main package. We’ll first create a Go module, the main.go file, and a package called CSV. You can find the source code in this Github repository for reference.Īll right, let’s get started.

The program should read this file and send a notification to each user and their friends as well.

The file content represents a list of 3,000 users. If you’re new to using GoLang and want to get a better understanding of how concurrency works, I’d recommend reading this article first: Concurrency in GoLang, Goroutines, and Channels Explained.įor this writing, we’ll be using a CSV file and the purpose of this program is to read the file and process its data. GoLang has incredible support for concurrent programs and in this article, we’ll see how we can optimize a program that processes a CSV file to send SMS notifications to its users.

Golang write to file