Configuring Amazon Web Services (AWS) for using Lambda

During the Software Craftsmanship and Testing conference UK, Mash run a session on AWS Lambda, with examples written in Java and python. Some other people also tried to do it in NodeJS. This session is here The first part, mostly accidental complexity, is how to...


Why SoCraTes UK is not just a conference for Software Craftsmen.

Last Friday, I attended the international Software Craftsmanship and Testing conference at the enchanting Wotton House, in Dorking. I was the only Designer among about 100 Developers. Honestly, I was feeling a little bit out of my element when I arrived, but I knew that...


Unit vs Integration Akka Testing

This is the sixth post in the series about integrating sync clients with async systems (1, 2, 3, 4, 5). Here we'll see how to test Akka actors with different testing styles. Unit vs Integration Testing Nowadays everybody agrees with the famous testing pyramid: Harder...


Coordination in Akka

This is the fifth post in the series about integrating sync clients with async systems (1, 2, 3, 4). Here we'll see how to manage the actor's lifecycle, so our service can use the available resources efficiently. Lifecycle Actors, threads, objects, resources... All of them...


AWS Lambda with API Gateway

In a previous post I showed you how to create and deploy an AWS Lambda. We will continue that work and look at updating just the code for that lambda. We will also add a REST endpoint to the AWS Lambda using AWS API Gateway....


A simple TDD environment in Haskell

I recently implemented the bowling kata in Haskell. In the process, I found out how set up my environment to comfortably do Test Driven Development. Hopefully, others might find this post helpful to begin their journey with the language. I used the following components: Haskell...


Publish-subscribe model in Kafka

This is the fourth post in the series about integrating sync clients with async systems (1, 2, 3). Here we'll try to understand how Kafka works in order to correctly leverage its publish-subscribe implementation. Kafka concepts According to the official documentation: Kafka is a distributed,...


Bowling Kata in Clojure, F# and Scala

In one of our evening apprenticeship meetings, a pair was doing the Bowling Kata in Java. After reviewing their code, I thought that it would be a good idea to do it myself. Every craftsman at Codurance is a polyglot developer and, although we have...


A Retrospective in the Park

The other day, I facilitated a sprint retrospective in the park. The sun was shining, and we had all been working hard to complete our backlog, so it felt like a nice reward for everyone’s efforts. Holding a retrospective outdoors can also give it an...


Initiative Circles

We have been trying to encourage decentralised decision making at Codurance. To that effect, everyone within the company understands that they have the power to make any decision they need to make so long as they seek advise from the people that may be impacted....


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