Wiring Up Subsonic via StructureMap

This post is a guide to configuring Subsonic with Structuremap to ensure the easiest TDD experience possible.

The first thing I did was generate the code using the SubSonic Linq Templates.

Next, it’s just a matter of telling StructureMap all about how to make an instance of SubSonicRepository<T>.

Here’s the goo that you need to make it all wire up:

        public static void ConfigureStructureMap()

        {

            ObjectFactory.Initialize(x =>

                {

                    x.UseDefaultStructureMapConfigFile = false;

                    x.Scan(scan =>

                    {

                        scan.WithDefaultConventions();

                        scan.TheCallingAssembly();

                        scan.AssemblyContainingType<IRepository>(); //Scans the Subsonic.Core assembly

                    });

                    x.ForRequestedType<IQuerySurface>().TheDefault.Is.ConstructedBy(c => new SomeDB()); //Gen'd by SubSonic

                    x.ForRequestedType<IDataProvider>().TheDefault.Is.ConstructedBy(c => ProviderFactory.GetProvider("A_Name_Of_A_Connection_In_Config"));

                    x.ForRequestedType(typeof(IRepository<>)).TheDefaultIsConcreteType(typeof(SubSonicRepository<>));

                }

            );

        }

1. IRepository<T> and SubSonicRepository<T> are both shipped in the SubSonic.Core DLL, so there’s no real work to do there.
2. SomeDB() is a class generated by the Linq Templates mentioned above.
3. The string passed to ProviderFactory.GetProvider(“”) is just the name of a connection that you define in your .config file.  You’ll see all this in the examples you downloaded when getting the bits.
4. The last line of the config tells StructureMap to map the open generic type to a concrete generic type.  For instance, when you request IRepository<Customer> StructureMap will give you a Repository<Customer>.

Now you can use constructor injection or ObjectFactory.GetInstance<T>() to get a concrete ready-to-go SubSonic repository.