Writing reusable and understandable code Wrapping functions is a very easy and quick way of maintaining single responsibility and decoupling for programs. The most basic form of function wrapping is passing the function you want to wrap to another function as parameter. package main import ( "fmt" ) func main()…

Coordinating different goroutines to achieve a single goal In a previous article I talked about how we can use the context.Context struct to share data and group distinct goroutines. One thing that’s missing from that article, is how to synchronise that group of things. Synchronise concurrent tasks means either wait…

There’s no one size fits all when it comes to testing apps — Most people agree that testing software is one of the most important activities software engineers perform. Nothing matters if a piece of software is very fast or well written but it doesn’t accomplish what it is intended to. Testing is a very interesting discipline and definitely an important one to…

Tracing requests in distributed systems — In this article we will be focusing on the implementation of the architecture presented in the previous article. Take your time to review it. Distributed tracing with OpenTelemetry — Part 1 Understanding OpenTelemetry and distributed tracingmedium.com The entire code can be found on my github repo. I’ll be creating and pasting some gists here for reference, those will only contain the most…

Understanding OpenTelemetry and distributed tracing — Running distributed systems in production is not an easy task. Access is limited, therefore issues are hard to track down and understand as well as to reproduce in other environments. No other environment is like production, no matter how similar it may seem. Usually you rely on different pieces of…

Combining SonarQube and gosec to get more information out of your source code — Static analysis (or static code analysis) is a great technique to find issues related to security, performance, coverage, coding style, and some times even logic without running your application. Usually this type of analysis is run against the source code of the application only. No execution required. This is a…

How to harness immutability to enhance readability and stability in your Golang app — The concept of immutability is very simple. After an object (or struct) is created, it can never be changed. It’s immutable. Although the concept seems simple, it’s not always easy to use it or benefit from it. As most things in computer science (and life), there are multiple ways of…

Leveraging Golang’s concurrency model to create concurrent data pipelines for data intensive applications — Data is a vital piece for all applications. Applications mainly receive data, process it and then create some sort of output out of it. The amount of data that is available nowadays is immense, which brings many challenges when trying to make sense out of it and transforming it into…

Creating pipelines for handling requests — When working with web apps, like web API’s, web sites, or any application that exposes a web server and handle requests, the most common behaviour is to handle each URL in a different way. …