An evolutionary architecture supports incremental, guided change across multiple dimensions.
For many years, software architecture was described as the “parts that are hard to change later”. But then microservices showed that if architects build evolvability into the architecture, change becomes easier. This talk, based on my upcoming book, investigates the family of software architectures that support evolutionary change, along with how to build evolvable systems. Understanding how to evolve architecture requires understanding how architectural dimensions interact; I describe how to achieve appropriate coupling between components and services. Incremental change is critical for the mechanics of evolution; I cover how to build engineering and DevOps practices to support continuous change. Uncontrolled evolution leads to undesirable side effects; I cover how fitness functions build protective, testable scaffolding around critical parts to guide the architecture as it evolves.
The software development ecosystem exists in a state of dynamic equilibrium, where any new tool, framework, or technique leads to disruption and the establishment of a new equilibrium. Predictability is impossible when the foundation architects plan against changes constantly in unexpected ways. Instead, prefer evolvability over predictability. This talk illustrates how to achieve evolutionary architectures and how to retrofit existing systems to support better evolution.
Scott Davis is a Principal Engineer with ThoughtWorks, where he focuses on leading-edge / innovative / emerging / non-traditional aspects of web development. This includes serverless web apps, mobile web apps (Responsive PWAs), HTML5-based SmartTV apps, Conversational UIs (like Siri and Alexa), and using web technologies to build IoT solutions.
Scott has been writing about web development for over a decade. His books include Getting Started with Grails, Groovy Recipes, GIS for Web Developers, The Google Maps API: Adding Where to Your Web Applications, and JBoss at Work. Scott is also the author of several popular article series at IBM developerWorks, including Mastering MEAN,Mastering Grails, and Practically Groovy. His videos include Architecture of the MEAN Stack, Responsive Mobile Architecture, and On the Road to Angular 2.