Architecture
My trade. Apparently. What is architecture anyway? I describe it as the wider context of solutions, data, protocols, technologies and standards and how they interact. Teams can do all this on their own, of course, but they tend to not have the necessary context, skills or experience to lead decisions in larger operations.
14 April 2019
Why is loose coupling between services so important?
You can’t eliminate coupling between collaborating services, but you can ensure that it doesn’t prevent you from enjoying the benefits of service-based development.
24 February 2019
Should teams choose their own languages and tools?
Standardisation does have a place, but it should be reserved for infrastructure and collaboration rather than languages and tools.
6 January 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.
27 November 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.
12 October 2018
Messaging anti-patterns in event-driven architecture
Event-driven integration can improve the scalability, resilience and scalability of distributed applications… but this does depend on the design of your event messages…
12 August 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.
29 July 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.
10 July 2018
Kafka on Azure Event Hub – does it miss too many of the good bits?
Microsoft have added a Kafka façade to Azure Event Hubs, presumably in the hope of luring Kafka users onto its platform. This makes sense as the platforms have a lot in common, though there are some missing Kafka features that may prove critical.
18 June 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.
3 June 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.
8 May 2018
How to decompose that monolith into microservices. Gently does it…
You’re rarely given the opportunity to focus on transitioning an architecture to the exclusion of everything else. You may have to get used to the idea that decomposing a monolith is a direction of travel rather than a clear destination.
9 March 2018
Microservice preconditions: what needs to be in place before you decompose that monolith...
One of the main benefits of microservices is that they reduce the cost of change. The problem is that you need to make a significant up-front investment to realise this saving. Your first few microservices are more likely to be an expensive and potentially painful undertaking.
16 February 2018
Relax. There’s no conflict between architecture and agile.
Agile teams still need to make architecture decisions, but in supporting them architects should seek “just enough” architecture over “big design up front” and practical solutions over large-scale abstract thinking.
27 January 2018
Can TOGAF and Agile really go together?
On the face of it, TOGAF describes a very different world to the agile preference for working software over documentation. That doesn’t mean that TOGAF is incompatible with agile, so long as you’re prepared to adapt its numerous building blocks.
13 December 2017
Entity services: when microservices are worse than monoliths
Finely-grained, entity-based services seem to be advocated by some pretty authoritative sources. This is unfortunate as they are something of an anti-pattern that can undermine many of the benefits of decomposing an monolith into micoservices.