Lambda Calculus in Clojure (Part...
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- By Felipe Fernández
- Posted 16 May 2016
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,...
- By Sandro Mancuso
- Posted 16 May 2016
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...
- By Matthew Butt
- Posted 14 May 2016
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...
- By Mashooq Badar
- Posted 13 May 2016
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....
- By Mashooq Badar
- Posted 11 May 2016
AWS Lambda for Beginners
AWS Lambda is a compute service from Amazon. It makes deployment and provisioning very simple and fits very well with microservices based architecture. You can find out more about AWS Lambda here. Currently supported platforms are JVM, Node JS and Python. The programming model for...
- By Felipe Fernández
- Posted 10 May 2016
Finite state machines with Akka
As you could remember from previous posts, Part 1 and Part 2, we're implementing a solution that integrates a sync client with an async system. Today we'll see how to keep track of the async operations so we can provide a sync response to the...
- By Ana Nogal
- Posted 07 May 2016
Code Smells – Part II
In the last post, Code Smells - Part I, I talked about the bloaters: they are code smells that can be identified as Long Methods, Large Classes, Primitive Obsessions, Long Parameter List and Data Clumps. In this one, I would like to dig into the...
- By Pedro Santos
- Posted 06 May 2016
Language feature envy
In my day job I mainly write C# code. On my own I like to try other languages like Swift, F#, Clojure, Objective C or Java. I learn a lot from writing code in different languages. When I go back to C# I often miss...
- By Felipe Fernández
- Posted 30 Apr 2016
Akka basics
As the previous post explained our system is based on Akka. Before going into more detail about our solution, I'd like to explain what Akka is about and why it is so awesome. Akka is a toolkit and not a framework, you can simply use...
- By Felipe Fernández
- Posted 28 Apr 2016
Async systems with sync clients
As the Reactive Manifesto says Reactive systems are: Responsive Resilient Elastic Message Driven The last principle often goes together with non-blocking async protocols. This style of communication "allows recipients to only consume resources while staying active, leading to less system overhead". This fits perfectly with...
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