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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 very similar values, we all have our own preferences when it comes to programming languages ...

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Simple Asynchronous Microservices using Lambda Architecture

Lambda Architecture is a simple, powerful, though limited example of a Microservice. As it is so simple, you want to use it as much as possible, to expose the more complex services/component in your system which cannot support this interaction model. Lambda Architecture depends on a data model with an append-only, immutable data source that serves as a system of ...

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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 energy and sense of enthusiasm that is harder to find in a small room. I’ve ...

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Management for the masses?

This is an important post. This is the ninth blog post in my mini-series on management, it is the blog post all the others have been building up to, let me recap some key points: When creating software there there is coding work, testing work, requirements work and some unavoidable management work Removing managers may remove some work (because managers ...

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Getting started with scala-native

This is just a quick recollection of the steps I’ve taken to get my own helloworld running using scala-native. I haven’t really started looking at scala-native in detail, but the idea behind it is really nice. Some general input about scala-native can be found here: The Github repository: https://github.com/scala-native/scala-native Presentation from Scaladays NY: https://github.com/densh/talks/blob/517b20c30dd4aaf390785039cdd002f623ea… Twitter to follow: @scala_native Since scala-native ...

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NPM module Browser-Sync in Java / Web projects

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Browser-Sync is a handy Node.js based NPM module which can be used for a faster web development. Browser-Sync synchronizes file changes and interactions across many devices. The most important feature is the live reloading. We can use the Browser-Sync in Java / Web projects too. Cagatay Civici created a great video tutorial how to use this module with the PrimeFaces showcase. ...

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Do not (only) meet the budget

In a previous article I wrote The actual decision (of a software architect) should lead to a solution that meets availability, performance, reliability, scalability, manageability and cost criteria. (Btw: the first six critera should be met, the last one should be at least met and minimized, but that is a different story.) Many times the criteria are met and there ...

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OSTraining: Learn from Field Experts with 3000+ Video Tutorials & Monthly Web Design Books

OSTraining Developer Courses: Lifetime Subscription Hey fellow geeks, This week, on our JCG Deals store, we have an extreme offer. We are offering a Lifetime Subscription for the OSTraining Developer Courses for only $65 instead of the original price of $2,000, yeap that is a massive 96% off. Become a pro web developer with a lifetime of guidance from OSTraining. ...

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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 client. Let’s start with the architectural diagram.                 ...

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Couchbase Cluster on Docker Swarm using Docker Compose and Docker Machine

This blog post will explain how to create and scale a Couchbase Cluster using full armor of Docker – Docker Machine, Docker Swarm and Docker Compose. Here is what we’ll do: Create a 3-node Docker Swarm Cluster using Docker Machine Run a Couchbase instance on two nodes Create a cluster Rebalance the cluster Scale and rebalance the cluster again Docker Swarm Cluster ...

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