January 2018
Beginner to intermediate
312 pages
7h 22m
English
Content preview from Domain Modeling Made Functional
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Wrapping Up
In this chapter, we learned how to ensure that data inside our domain could be trusted.
We saw that the combination of “smart constructors” for simple types, and “making illegal states unrepresentable” for more complex types, meant that we could enforce many kinds of integrity rules using the type system itself, leading to more self-documenting code and less need for unit tests.
We also looked at maintaining consistent data within one bounded context and between bounded contexts, concluding that, unless you are working within a single aggregate, you should design for eventual consistency rather that immediate consistency.
In the next chapter, we’ll put all this into practice as we model our order-placing workflow.
Footnotes
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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.