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Derek Comartin

Event Based Architecture: What do you mean by EVENT?

The term “Event” is really overloaded. There are many different utilities that leverage events. Event Sourcing, Event Carried State Transfer, and Event Notifications. None of these are for the same purpose. When talking about an Event Based architecture, realize which one you’re using and for what purpose. YouTube Check out my YouTube channel where I post all kinds of content that accompanies my posts including this video showing everything that is in this post. Overloaded With the popularity of Microservices, Event Driven Architecture, Event Sourcing, and tooling, the term “Events” has become pretty overloaded and I find has been causing some confusion.… Read More »Event Based Architecture: What do you mean by EVENT?

Aggregate Design: Using Invariants as a Guide

How do you compose an aggregate? For me, aggregate design involves understanding the invariants. Invariants are business rules that must always be consistent. Understanding the invariants will guide your aggregate design. Everything I seemingly post ends up being about defining boundaries! Aggregates are yet another example of defining boundaries based on invariants and consistency. YouTube Check out my YouTube channel where I post all kinds of content that accompanies my posts including this video showing everything that is in this post. Shipment The example I’m going to use is the concept of a Shipment. You could think of this as a food… Read More »Aggregate Design: Using Invariants as a Guide

Do Microservices require Containers/Docker/Kubernetes?

Containers, Docker, Kubernetes, and Serverless are often used when explaining a Microservices architecture. However, focusing on physical deployment is missing the point of Microservices entirely. Microservices (or any size services) are about logical separation and not about physical deployment. Deployment flexibility is a by-product of having well-defined boundaries for services that are autonomous. YouTube Check out my YouTube channel where I post all kinds of content that accompanies my posts including this video showing everything that is in this post. Microservices Like many terms in the industry, they often get confused or conflated with other concepts and lose their original meaning. Martin… Read More »Do Microservices require Containers/Docker/Kubernetes?