We have an existing WCF service and would like to get the Cocktail/DevForce injection to work. The code is as follows:

[Export(typeof(IMyWcfService))]
public class MyWcfService : IMyWcfService
{
   [Import(typeof(IMyUnitOfWork))]
   private IMyUnitOfWork MyUnitOfWork;

   public Customer ProcessRequest(int id)
   {
      Customer customer = await MyUnitOfWork.CustomerRepository.FindCustomer(id);
      return customer;
   }
}

The MyUnitOfWork field is not getting resolved. This is because Cocktail is not bootstrapped. I have seen examples of using Cocktail with WPF and I am able to get that to work. But the WCF part is not working.

Has anyone done this before?

Thanks!

The above won't work, because the WCF service is not created by MEF. You could call Composition.BuildUp(this) in the constructor to satisfy the imports, but again, don't do this on the server with Cocktial as-is, unless you want to create yourself a headache down the road.

If you only want to use the Compositon part of Cocktail on the server, the way to do that is to implement a threadsafe version of ICompositionProvider that sets up the MEF container per thread instead of a globally shared container. You can then call Compositon.SetProvider to configure Cocktail to use your threadsafe composition provider.