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Rocco Langeweg

Building testable Celery tasks

Building testable Celery tasks

When designing a Python application with asynchronous message handling, you very quickly find a good case to implement Celery in your application. Over the years I've seen many tasks written within Celery, which is used for async handling of sending notifications, updating external resources or processing heavy duty

Clean Architecture: Implementing testing patterns

Clean Architecture

Clean Architecture: Implementing testing patterns

When we are writing an application using Clean Architecture standards, we are setting up our application for easy testing. There are different testing patterns to apply, and each have their own boundaries within the Clean Architecture design. As a developer, we want to have multiple layers of tests available. We

Unit testing gRPC streams in Go

Unit testing gRPC streams in Go

One of the powerful features of gRPC is their ability to stream data from the server, client or bidirectional. This opens up a lot of use cases, but also more asynchronous communication which allows you to speed up your application. However, they add another complexity when unit testing, as you

Microservices by Example: Airbnb

Microservices Featured

Microservices by Example: Airbnb

Welcome to the series Microservices by Example, where we will use real world use cases as example to break and talk about microservice architecture. In today's post we will look at Airbnb and other hotel or property reservation systems. Disclaimer: Neither I nor this blog post is in

Clean Architecture: Using Interface Segregation in Go

Clean Architecture: Using Interface Segregation in Go

In this blog, we will talk about how we can use Go's powerful interfaces to optimize our Clean Architecture or Domain Driven Design (DDD) by implementing Interface Segregation from SOLID. That is a lot of terminology in a single sentence; let's break it down. Basics If

Development tools in 2024

Development tools in 2024

In this blog I would like to share some of the tools I use to boost my productivity as a software developer. Some of these are paid, while others are completely free. For the paid plugins, I always decide if their subscription fee is in balance with the amount of

Using Skaffold to accelerate Microservice Development

Kubernetes Featured

Using Skaffold to accelerate Microservice Development

When transitioning from monolithic application development to microservice development, it becomes more tedious to work on applications. Microservices can often use different technologies, but can also utilize Kubernetes native components which you cannot easily simulate with other tools like Docker Compose. Skaffold and other development tools built for Kubernetes help

Domain Driven Challenges: How to handle exceptions

Design Patterns

Domain Driven Challenges: How to handle exceptions

Learn how to handle errors effectively in Domain-Driven Design, with best practices and strategies for managing exceptions in applications.

Automatic review apps for microservices with ArgoCD

Automatic review apps for microservices with ArgoCD

Learn how to use ArgoCD’s ApplicationSet to automatically deploy review apps for microservices using the PullRequestGenerator

Managing ArgoCD Application resources

Managing ArgoCD Application resources

We all reach a point when using ArgoCD where we get it up and running and get really excited about the Declarative GitOps buzzwords that…

Optimizing Renovate for GitLab with 500+ Repositories

Optimizing Renovate for GitLab with 500+ Repositories

Renovate is a great tool for keeping your code secure and up-to-date. But when you have 500+ repositories, it can be slow and inefficient…