Unbreakable Domain Models

Published on 09 June 2013 by @mathiasverraes

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Abstract

Data Mappers (like Doctrine2) help us a lot to persist data. Yet many projects are still struggling with tough questions:

Let’s look beyond the old Gang of Four design patterns, and take some clues from tactical Domain Driven Design. At the heart of our models, we can use Value Objects and Entities, with tightly defined consistency boundaries. Repositories abstract away the persistence. Encapsulated Operations helps us to protect invariants. And if we need to manage a lot of complexity, the Specification pattern helps us express business rules in the language of the business.

These patterns help us evolve from structural data models, to rich behavioral models. They capture not just state and relationships, but true meaning.

The presentation is a fast paced introduction to some patterns and ideas that will make your Domain Model expressive, unbreakable, and beautiful.

Learn More

Check out Elephant in the Room #002: The Heart and Soul of OOP for more info about Value Objects.

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Upcoming

2018
Topic Event Type Location Date
Advanced Domain-Driven Design DDD Europe workshop Brussels, Paris 2018
Design Heuristics DDD eXchange keynote London April 2018
DDD for Messaging Architectures ExploreDDD workshop Denver Sep 2018
Design Heuristics Kandddinsky talk Berlin Oct 2018
Tactical DDD Kandddinsky workshop Berlin Oct 2018
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Creative Commons License This work by Mathias Verraes is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License.