Open Source

Get started with Mattermost on Azure using the Mattermost on AKS quickstart from the Azure CNAB Quickstart Library.

Many API frameworks implement an async HTTP API pattern to address the problem of coordinating the state of long-running operations with external clients. This post looks at how we can use Axios interceptors to simplify and centralise the UI logic required to work with this API pattern.

Tracking down unexpected allocations in a high-performance .NET parsing library.

Improve the already-great Windows Terminal experience by following these tips for customizing the application to work best for you.

During our projects at endjin, we often find ourselves evangelising Behaviour Driven Development, and specifically SpecFlow. In this post we look at a technique for defining complex test data objects in your Gherkin feature files, which we've also made available via the endjin-sponsored Corvus.NET project.

See how to manage consistent default configuration across all your .NET projects by using NuGet build assets.

As part of our work with OceanMind, endjin wrote a high performance .NET AIS parser. AIS (Automatic Identification System) is how commercial ships report location information. This blog describes the parser, and the performance techniques it uses.

Porter is a tool based on the CNAB (Cloud Native Application Bundle) spec. It can be used for building, managing, and installing application bundles. This guide will walk you through how to get set up with Porter on Windows.

The Azure CNAB Quickstarts Library helps you get up and running with CNAB and Porter. We've built quickstarts covering solutions like WordPress, Ghost, Mattermost, and data platforms like Apache Airflow, SQL Server AlwaysOn clusters and Kubernetes features like an nginx ingress controller and an Azure AD enabled OAuth2 Proxy. We've condensed all our learnings from the past 9 months of working on the project and turned them into a 10 minute video which explains all the key concepts. We hope this video helps accelerate your own CNAB & Porter epiphanies!

In partnership with Microsoft, we have released Azure CNAB Quickstarts Library on GitHub. CNAB (Cloud-Native Application Bundle) is a new specification designed for facilitating the packaging, installation, upgrading and uninstallation of cloud-native solutions in the cloud, on-premise or on the edge. We've created a number of quickstarts covering Apache Airflow, Azure Kubernetes Service, Ghost, Kubeflow, SQL Server Always On and Wordpress to help demonstrate the power of CNAB and Porter.

In this post, Ian describes some of the highlights from the NDC London conference

Expression Trees are one of .NET's super powers; but they are hugely overlooked and misunderstood. They can be used for on-the-fly code generation; building DSLs, and producing high performance computational algorithms. I'm trying to gather evidence about how you are using them, to make a case for future investments in the Expression Tree subsystem in .NET Core / .NET 5.0

We worked on a project recently which required us to build a highly performant system for processing vast quantities of messages in real time. We had made the decision to run this processing using Azure Functions with C#. This post runs through some of the techniques we used for writing highly performant, low allocation code, including data streaming, list preallocation and the relatively new C# feature: Span<T>.

Here at endjin we've done a lot of work around data analysis and ETL. As part of this we have done some work with Databricks Notebooks on Microsoft Azure. Notebooks can be used for complex and powerful data analysis using Spark. Spark is a "unified analytics engine for big data and machine learning". It allows you to run data analysis workloads, and can be accessed via many APIs. This means that you can build up data processes and models using a language you feel comfortable with. They can also be run as an activity in a ADF pipeline, and combined with Mapping Data Flows to build up a complex ETL process which can be run via ADF.

Snowflake is a cloud native data warehouse platform, that enabled data engineering, data science, data lakes, data sharing and data warehousing. Endjin are very excited to announce our partnership.

A good test suite should validate behaviour across your code base, testing as many edge cases as reasonably possible. A common "edge case", is passing a null value when a value isn't expected to be null. In Specflow, all values used in scenario examples are treated as strings, so it isn't possible (by default) to pass in a null value. However, using "Step Argument Transformations", we can achieve the desired behaviour. Read this blog to learn how this can be implemented.

Here is a quick dive into encryption and blockchain. This post goes into the ideas behind hashing, and how these translate into encrypted messaging techniques. It also delves blockchain and how signing and versioning allow for consistent and immutable transactions. Definitely worth a read if you're interested in these concepts!

The OpenAPI SDK based OpenAPI document converters extension has been updated to support Visual Studio 2017.

Using the recently Open Sourced OpenAPI SDK, we create a Visual Studio extension from converting OpenAPI specificaitons between YAML and JSON formats.

This post shows how to add a Power BI Embedded report to an ASP.NET Core application.

It is with a huge amount of honour to announce that endjin co-founder, Howard van Rooijen, has been awarded an Azure MVP award for his contributions to the Azure ecosystem.

Meta-Runners allow you to easily create reusable build components for TeamCity, in this post I demonstrate how to create a Meta-Runner to create Azure Application Insights Release Annotations.

Mike Larah shares his tips for how to best customize ConEmu to improve your terminal experience for Windows Command Prompy and PowerShell

An experiment to examine if we can create a tool that can automatically detect accidental breaking changes in a .NET API and fail the build, so we can properly SemVer our NuGet packages.

Meta-Runners allow you to easily create reusable build components for TeamCity, in this post I demonstrate how to create a Meta-Runner to wrap ILMerge functionality.

Microsoft have added SHA256 support to Signed XML, and Endjin.Licensing has been updating to take advantage of this breaking change.

We've built and open-sourced a Visual Studio Extension that provides basic support for discovering and running CucumberJS tests with Node.JS, in the Visual Studio Test Environment.

Git has powerful extensibility points, which you can harness to automate your dev inner loop. In this post we examine how to use Git Hooks to reduce the occurrence of merge conflicts.

We're huge fans of SpecFlow. We harvested 25 reusable steps from our various open source projects into a new extension that you can use to reduce your own boilerplate.

Endjin.Retry is our simple .NET library for handling transient errors, to make your Cloud applications more resilient and reliable.

We've open sourced a lightweight .NET based licensing framework we've been using internally over the last couple of years; in this post I'm going to highlight some real world usage scenarios.

Endjin.Licensing is our .NET based licensing framework; in this post we highlight its extensibility features, demonstrating how to add custom license validation logic.

Endjin.Licensing is our .NET based licensing framework; in this post we show how to create and validate a license using C#

We've open sourced a lightweight .NET based licensing framework; in this post we flesh out the behaviours we want the framework to support using Gherkin flavoured BDD specifications.

We've open sourced a lightweight .NET based licensing framework we've been using internally over the last couple of years. In this post I explain why we created it in the first place, rather than using existing offerings.

TPL Dataflow is one of the most powerful, yet unknown framworks contained within .NET. If you need to do high performance data processing TPL Dataflow should be your first port of call.

Meta-Runners allow you to easily create reusable build components for TeamCity, in this post I demonstrate how to create a Meta-Runner to wrap Jasmine BDD Framework test runner.

Joshua, 15, is spending two weeks at endjin doing work experience. In this post he reflects on his first week.

Learn how to debug the endjin composition framework.

Learn how to use the endjin composition framework inside ASP.NET MVC or Web API

Learn how to use the endjin composition framework content factory

Dealing with Transient Faults is absolutely essential when working in The Cloud. We delve into the library we've created for dealing with this situation.

Learn how to use the endjin composition framework for dependency injection.

Learn why we created the endjin composition framework for dependency injection.

A new version of Templify has been released, which includes a huge performance improvement contributed by the Open Source community.

To celebrate joining JetBrains Development Academy Board, we release a PowerShell modules to make working with TeamCity easier.

We attended the two day Dev4Good hackathon in Hammersmith; and worked on digitalizing the paper based application process for the The Goldsmith Craft and Design Council awards.

Long time listener, first time guest. I was invited to speak on the .NET Rocks! Podcast, to talk about Sharp Architecture and various other Open Source projects I've been involved with.

We've decided to combine the StyleCop and StyleCop for ReSharper code bases to make long term maintenance easier.

How does Expression Blend managed to find the Visual States exposed by the standard controls? How could you do the same with your own code?

We've added convention over configuration features to our Dependency Injection library - the endjin composition framework, to help improve your productivity.

Templify is a simple tool for tokenising and packaging entire code based solutions. It's designed to unfurl demos / quickstarts / solution templates.