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Engineering Practices

So, the other week I took a look at the Factory Method and Abstract Factory design patterns. This week I’m continuing with the creational design patterns, this time focusing on the builder pattern! The builder pattern is used when there is complex set up involved in creating an object. Like the other creational patterns, it […]


Agile Architecture: Painting by Numbers

by Howard van Rooijen

I originally wrote this post in 2007 (now lost in the annals of time), and is one of my favourite posts. I’m very fond of the confluence of ideas and the serendipity of discovering someone amazing from another discipline articulating the same thoughts I was having. During one of the Open Space sessions I attended […]


For those who don’t know, I am currently in the process of carrying out a full code review and improvement of some of our internal code using NDepend. To find out more about the quality measures that NDepend uses to analyse the code – read my first blog in this series! Otherwise, let’s press on! […]


Enforce resource tagging with Azure Policy

by Mike Larah

We recently had a requirement from a client that all of their Azure resources must be tagged with a specific set of tags, which were ultimately to be used for cost accounting when the bill came rolling in. For simplicity of this blog post, let’s assume the client just required that all resources had to […]


Over the years we’ve built a lot of IP up here at endjin. With a growing codebase, and with my training shifting to look at software architecture, I thought I’d attempt a code review to see what insight I could gain! So… Here goes nothing! The tool I chose to carry out this review is […]


ML.NET, Azure Functions and the 4th Industrial Revolution

by Howard van Rooijen

TLDR; There is a lot of hype around AI & ML. Here’s an example of using ML.NET & Azure Functions to deliver a series of micro-optimisations, to automate a series of 1 second tasks. When applied to business processes, this is what the 4th Industrial Revolution could look like. We’re in the 3rd major hype […]


In September I joined endjin a Technical Fellow (an entirely new branch in endjin’s career pathway to accommodate me – more on that later). I’ve has been involved with endjin since 2011, as an Associate, helping to deliver some of our most technically challenging projects (and if you go even further back, I attended Cambridge University with endjin co-founder […]


There’s been a little bit of a gap since my last Rx blog, I’ve been pretty busy with keeping up with Advent of Code in any spare time (and I’m sure there will be a blog along those lines at some point in the near future). But, for now, it’s time for a deep dive […]


Use-case Here’s the background to this blog: I’ve always found getting csv files into a SQL Server instance much more convoluted than seems necessary. The manual tools provided in SSMS have caused me hours of pain in the past, trying to match-up data types from source and sink. I never seemed to get it right. […]


This has been sitting in my “blogs” folder for some time, with little more in it than a first sentence about the fact that I haven’t written this blog yet. Whilst going over C#, reactive extensions have been one of the things that I have struggled to get my head around the most. I think […]


Overflowing with dataflow part 2: TPL Dataflow

by Carmel Eve

Edit: In case you missed it! Here’s a link to part 1, a general overview of dataflow as a processing technique! The specific implementation of dataflow that I want to talk about is the TPL dataflow library. The task parallel library is a .NET library which aims to make parallel processing and concurrency simpler to […]


Async pitfalls: deferred work and resource ownership

by Ian Griffiths

Asynchronous code has many traps for the unwary. In fact, it has plenty of ground that’s treacherous even for pathologically careful coders. For example, certain ways of using asynchrony can reduce the control you have over concurrency and ordering. This can result in subtle bugs, particularly when the asynchronous work operates on shared underlying resources. […]


(TL;DR This month I learnt a lot about the importance of package management, maintenance and the minimisation of dependencies.) It’s been a little while since my last blog, I’ve been pretty bogged down in a world of packages, .NET frameworks and testing. And it all started with what I thought would be a simple update […]


I’m very excited that Ian Griffiths has joined endjin as a “Technical Fellow”. This is a new career pathway branch we created especially for Ian, as he didn’t really fit into any of our existing roles; his skills and expertise exemplify a pathway that many software engineers desire, but few have the opportunity to achieve […]


Not coming from a background in computer science, the inner workings of a computer have always been somewhat of a mystery to me. This is something I’ve always meant to remedy but never quite gotten around to. When I transitioned from C++ to C# my main thought surrounding memory management was “well thank god I […]


I’m back! Hi everyone. It’s been a long while since my last blog. *Bows head in shame* Blogging is one of those things I know I should do more often, but I’m still not in the routine in which one needs to be in order to do it regularly. As a consequence, what usually happens […]


OpenAPI code generators for Visual Studio

by Howard van Rooijen

Building RESTful APIs is a common activity at endjin. If you’ve seen our API Maturity Matrix, you’ll realise that we spend quite a lot of time thinking about the strategy, governance, legal, commercial, and operational side of building APIs along with the standard concerns of design, development, quality, infrastructure and support. One of the most […]


The diversification of .NET technologies – from Windows Desktop Applications using WPF and WinForms, UWP, ASP.NET and ASP.NET Core, “portable” libraries, the various flavours of .NET Standard, .NET Core (and portable executables on MacOS and Linux) – have brought with them incompatibilities, and a huge problem with older (but well-used) libraries that aren’t built for […]


One very useful but little used pattern when working with Resource Manager templates, is the ability to use parameters to optionally deploy resources, constrain certain resource configurations based on other user defined parameters, or to toggle parameters based on other values. To give a couple of concrete examples, imagine we have a highly reusable template […]


I guarantee that any of you who have ever worked as, or with, a software engineer will have heard the phrase “it works on my machine!” before. This statement is so infamous that there’s even a certificate for it, that can be handed out to those who have defiantly claimed that the feature that they’ve […]


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