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Editorial Team
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Asked: 2026-06-13T22:35:14+00:00

I have some components implementing the same interface and I would like to chose

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I have some components implementing the same interface and I would like to chose which one gets injected to my Repository.

 Component.For<IRepository>().ImplementedBy<Repository>().<whatShouldGoHere>()

I thought I had this working with DependsOn but now I saw that DependsOn are for static dependecies such as strings. Is the IHandlerSelector the only way forward? I would rather have the declaration inline with the component registration. Maybe a factory method? Are there any recommendations?

Edit
Example Constructor

public PersitentRepository(Func<ISession,string> sessionFactory)

Digging around I realize that the delegate is an artifact from the TypedFactoryFacility. There seems to have been some change so it now resolves by type only. In older Castle versions the string argument was used to select component by name.

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1 Answer

  1. Editorial Team

    DependsOn does work for other things than statics, the problem is that the injected delegate does not resolve the way it used to. I ended up registering my own component for handling this specific delegate

    container.Register(Component.for<Func<ISession,string>>().ImplementedBy(sessionName => container.resolve<ISession>(sessionName));

    (I typed the above from memory so please excuse any typos)

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