Comments (3)
VaughnVernon
commented on June 29, 2024
3
Your assumption is correct. Associating any business-specific data (model objects) with a Domain Service beyond a single operation is the wrong decision.
A Repository is technical state to make it convenient to use one or more Aggregates in the business operation.
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VaughnVernon
commented on June 29, 2024
It's free of business state. Technical state is fine, and it's typical for a Domain Service to use a Repository.
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ErikJson
commented on June 29, 2024
Thanks for your response, Vaughn.
The terms "business state" and "technical state" are a bit vague to me, and I can't find good resources on them. As far as I can tell they are not covered in the book.
We believe ourselves to have a decent understanding of what can and cannot be stored as class properties on the service, e.g. we wouldn't think to store the tenant or product IDs as properties on BusinessPriorityCalculator, so we'll proceed with the assumption that we can trust our judgment rather than a set of clear rules.
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Related Issues (20)
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