In this post I would like to discuss a case that may come up when your service is interacting with a 3rd party service. Use Case: Imagine a world where an NBA team decides to compensate their players by a set of rules. In this case, by their personal statistics. The service applies…

I like weightlifting and powerlifting, and as a (home) gym rat, I know that skipping leg day is totally unacceptable. Skipping muscles and/or movement can lead to imbalances, and ultimately, injuries. In the development, cloud and operations world, the correct terminology for an imbalance is a bottleneck. In this post…

NBA Finals are kicking off tomorrow, and there’s no better time for a new post than now. In previous posts I talked extensively about unit testing, mocking, coverage and how important they are for a reliable and efficient development process. With that said, unit tests have their own limitations: their…

When writing code projects, developers will usually devote a large portion of their time for choosing the right frameworks, libraries, databases and other 3rd party components. One section that is often overlooked and neglected is the testing. Proper testing actually make your project better because they encourages you to: Apply…

In this blog post I want to talk about APIs, and how to design your API when working with microservices. Prerequisites: 1. Golang — https://golang.org/doc/install 2. Protobuf compiler — https://grpc.io/docs/protoc-installation/ The project’s source code can be found here Breaking the Monolith Until fairly recently, the go-to approach to building applications was creating a…

I wanted to publish this article during the early days of the NBA Playoffs, when Damian Lillard was balling. Although it’s a bit too late now, he still deserves a big shout out. In this post we will review and deploy a golang application that follows the clean architecture principles. Source code can be found here. Update: 3.7.2021: Removed OpenAPI client generation because it didn’t help much (and I also had to write…

In this post I am going to cover some common cases and incidents that you are likely to experience when using goroutines and how to deal with them. Table of contents: Introduction 1. Waiting for the goroutines 2. Deadlocks 3. Getting unexpected results 4. Race conditions Introduction First, what’s a goroutine? Golang is concurrent…

Introduction: Around 9 months ago I started making the transition from Python to Golang, mainly due to the technology stack used in my company. One difficult spot I found was mocking AWS services. In this article I am going to demonstrate how to mock AWS services using Golang. Motivation (Why do we even need to mock)? In the previous…

Update 07.09.2020: Added an AWS DynamoDB. In this article we will build, test and deploy an example lambda using SAM, Python3 and Pytest, while maintaining maximum code coverage, development velocity and simplicity. Introduction: AWS provides an open source framework for building serverless applications — Serverless Application Model. SAM allows you…