Explore DDD 2017 – Denver, Sept. 21-22
Most of our best examples of model exploration happen behind closed corporate doors. Generic subdomains, such as time, may provide a way to try out approaches to domain modeling more publicly.
Most popular software libraries for managing time are based on similar models, and JodaTime, a common Java library being incorporated into Java 9, is a good example. It has a fairly good model, and illustrates the tendency for the first good idea to be the last idea. Exploration stops as soon as a workable solution is found. While this is actually not such a bad idea in supporting domains, it short-circuits work on the critical core domain.But how do we escape from these good models that stop our thinking? Eric will walk through some rich semantics of an alternate model of time and an associated library to illustrate that there is always another model.
The code is in Clojure, but you don’t need to know Clojure to understand the talk. The code for this presentation is available at https://github.com/domainlanguage/time-count.
About Eric
Eric Evans is the author of “Domain-Driven Design: Tackling Complexity in Software,” Addison-Wesley 2004.
Since the early 1990s, he has worked on many projects developing large business systems with objects with many different approaches and many different outcomes. The book is a synthesis of that experience. It presents a system of modeling and design techniques that successful teams have used to align complex software systems with business needs and to keep projects agile as systems grow large.
Eric now leads “Domain Language”, a consulting group which coaches and trains teams applying domain-driven design, helping them to make their development work more productive and more valuable to their business.
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