standards-c-sharp

Do no use stereotype-based registrations

• Stereotypes are a concept borrowed from the Spring framework.
• For instance, we may define a Repository stereotype, denoting the role of a repository in the overall architecture at a conceptual, rather than implementation, level.
• We have experimented with registering components based on stereotype. For instance, we have had a RegisterRepository method that registers a component with the container as a Singleton, wrapped by a MeasurementInterceptor.
• Experience has shown us that such stereotype registrations are not well understood and have been used inconsistently. For instance, many repos were not registered using RegisterReposity, and yet other non-repos are registered using this method.
• We concluded that this approach causes more problems than it solved. A simpler solution is to explicitly describe each component’s characteristics upon registration. This way, we are free to register components as we choose, and the registrations API is kept simpler.

Don’t

container.RegisterRepository<ICityInfoRepository, CityInfoRepository>()

Do

[RegisterSingleton(InterceptedBy = typeof(MeasurementInterceptor))]
public class CityInfoRepository : ICityInfoRepository
{ ... }

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