So, there you go: different bounded contexts in the same physical package with controlled dependencies. calls from Organization to Care, or in the Care implementation references a type defined in Organization’s internal model) the build will fail with an error. If a developer violates the dependency rules (e.g. These dependency rules can be described for NsDepCop in its config file. DDD divides a large business system to small bounded contexts each. It’s a logical boundary for domains and subdomains. Organization context doesn’t even know about Care context so there’s no dependency in that direction. SPS Tech 1.07K subscribers Bonded context is a group of subdomains. Organization context contains the organizational hierachy of hospitals and employees like doctors and other staff.Ĭare context uses services and information from Organization context, but only through its interface not knowing anything about its inner workings – just like separate web services, but in the same C# project and DLL.Care context contains patient related concepts, like care activities and care documents.In a healthcare system Care and Organization are two bounded contexts. So, what I do is I implement bounded contexts with C# namespaces and enforce the boundaries between them with a static code analyzer tool called NsDepCop. Changing physical boundaries is much more costly then changing logical ones so you should postpone the physical slicing until context bounderies are well understood, tried and tested. Especially not in the early stages of a system’s development when models and context boundaries are not fully understood and can change a lot. People often think of bounded contexts as physical components (e.g.: separate web services) because the physical separation encourages loose coupling and forces an explicit model mapping between the components.īut wait, logical dependency and model mapping concerns should not dictate physical packaging decisions! There are many other forces that shape the physical packaging decisions so (logical) context boundaries should not be a primary concern here. As a boundary it helps you to decompose the problem into smaller, more manageable units whose interdependence in minimized and controlled. ![]() E.g.: a Product in the Warehouse Context has properties like size and dimensions while in the Sales Context it has price and sales tax rate. ![]() As a context it defines the precise meaning of a concept.In domain-driven design (DDD) a bounded context is used both to disambiguate concepts and to manage complexity.
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