Curious Case of Database Transaction Deadlocks Using TransactionScope

We built an event driven system in my team over 2 years ago that sometime back ran into database transaction deadlock problems which puzzled me enough to want to take a deeper look into what happened. This mini-post is a bit of documentation of that investigation.

Converting an ASP.NET Core MVC App to Blazor SPA – Part 3 (Authentication + Wrap up)

The central idea around Blazor auth is for the UI system to be able to query the authentication state of the user and render different views. Blazor uses AuthenticationStateProvider to query this auth state via the AuthorizeView component.

Converting an ASP.NET Core MVC App to Blazor SPA – Part 2 (The Frontend)

Given the fact that there is no shortage of SPA frameworks and libraries like Angular, React, Vue, Knockout ad inifitum, for building the new frontend app for my app, I decided to go with Blazor.

Converting an ASP.NET Core MVC App to Blazor SPA – Part 1 (The Backend)

I have a personal expense tracking app that for the last few months I’d been working to migrate away from MVC towards more modern client apps whilst reusing the backend code and logic.

Using Mikado Technique to Migrate to .NET Core

Not long ago we completed the migration of all our services to .NET Core. Of note was a mission critical full .NET framework legacy Windows Service and in this post I would like to share how we completed that migration.

Managing Technical Debt in Software

There are many posts and articles that expound the virtues of paying back the tech debt and philosophise at great lengths about the various design patterns that can improve the design of the code. In this post I’d like to tackle the more pragmatic and real life aspects around tech debt from my perspective.

Mars Rover Programming Kata using DDD+TDD+Ports and Adapters

A few weeks ago I came across this Mars Rover programming challenge/kata and being a bit of a space buff, I thought I will take a crack at it.

Some Heuristics for Mocking vs State Verification in TDD

In this post I will share some of the TDD heuristics that I have found useful on when you should use mocking to verify interactions and when should you resort to state verification.

Recovering from Aurora Database Failovers and MySql Connection Pooling

Recently a planned AWS Aurora database failover/master reboot caused database connection failures in one of our services which caused me to delve deeper into how MySql driver manages connections under the hood.

IIS App Pool Recycles Will Wreck Your Long Running Background Jobs

We have a batch process that runs every morning, processes a bunch of data gathered out of our central e-commerce database and publishes messages on a queue for another service … Continue reading IIS App Pool Recycles Will Wreck Your Long Running Background Jobs

Biting the Bullet – Testing Microservices in Production with Tracer Bullet Tests

Tracer Bullet Testing or Synthetic Transactions or Synthetic Monitoring is a way of testing your service/app in production where its supposed to run but without affecting users/clients/external systems.