Design patterns
January 6th, 2019
Finding service boundaries: more than just the bounded context
When you are identifying service boundaries, it’s not enough to consider the domain model alone. There are other, more pragmatic concerns to bear in mind.
November 27th, 2018
Writing ArchUnit style tests for .Net and C# to enforce architecture rules
ArchUnit is a java library that provides a fluent API for creating self-testing architectures via unit tests. A similar library can be written for .Net Standard that acts on compiled assemblies rather than raw code.
October 12th, 2018
Message design for event-driven architecture: anti-patterns and pitfalls
Event-driven integration can improve the scalability, resilience and scalability of distributed applications… but this does depend on the design of your event messages…
August 12th, 2018
Building Twelve Factor Apps with .Net Core
Twelve factor apps provide a methodology for building apps that are optimised for modern cloud environments. It’s only been achievable in the Microsoft world since the advent of .Net Core.
July 29th, 2018
Autonomous bubbles and event streams: Pragmatic approaches to working with legacy systems
It’s easy to get caught up in unrealistic notions that you can re-write a legacy system or gradually decompose it. There are other, more pragmatic approaches that can help to modernise architectures and enable new development.
June 18th, 2018
Using architectural “fitness functions” as a guide to system design
Fitness functions can be a useful metaphor for guiding an emerging architecture, but you do have to invest in making sure they describe the right outcome.
June 3rd, 2018
Layers, onions, hexagons and the folly of application-wide abstractions
Not only are layered applications difficult to maintain, but the common abstractions they are built on tend to give rise to inflexible implementations that have serious scalability challenges.
July 22nd, 2017
The poor man’s Cassandra: scaling Azure Table Storage to maximise throughput.
Azure Table Storage can be tuned for high throughput workloads, but you’ll probably be faced with some difficult trade-offs.
February 12th, 2017
A simple guide to using Redux with React.js (yeah, right…)
Learning React.js always starts so well, but adding Redux into the mix can make things unnecessarily complex. The lack of accessible examples doesn’t help – this is an attempt at writing a stripped down, bare bones introduction that focuses on the main ideas behind Redux.
January 7th, 2017
Event stores and event sourcing: some practical disadvantages and problems
Event stores and event sourcing are a powerful idea, but they can be vulnerable to a number of technical and operational challenges when faced with real world complexity.
October 27th, 2016
The problem with using maturity models to describe technology solutions
Maturity models are a management tool. When applied to technology solutions they often provide a weak analysis that describes a false progression.
October 3rd, 2016
What’s so bad about monoliths anyway…?!
Don’t get me wrong – I am an advocate of decomposing functionality into autonomous services. My reservation is that you need to have a lot of prerequisites in place before you can start leveraging microservices.
July 29th, 2016
Designing an event store for scalable event sourcing
Event sourcing can scale very nicely, though this does depend on a number of key design decisions for the underlying event store.
June 2nd, 2016
Is “Serverless” architecture just a finely-grained rebranding of PaaS?
Serverless computing makes bold promises of development without having to worry about environments, scaling or deployment. Haven’t we been here before?
April 14th, 2016
What do we actually mean when we say “business logic”?
In most cases “business logic” just refers to the poorly-defined “gloop” that sits between user interfaces and databases in layered architectures.