February 2013
Intermediate to advanced
656 pages
21h 26m
English
Content preview from Implementing Domain-Driven DesignBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Favor Value Object Parts
Choose to model a contained Aggregate part as a Value Object rather than an Entity whenever possible. A contained part that can be completely replaced, if its replacement does not cause significant overhead in the model or infrastructure, is the best candidate.
Our current Product model is designed with two simple attributes and three Value-typed properties. Both description and name are String attributes that can be completely replaced. The productId and tenantId Values are maintained as stable identities; that is, they are never changed after construction. They support reference by identity rather than direct to object. In fact, the referenced Tenant Aggregate is not even in the same Bounded Context and thus should ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.