mrahhal / MR.AttributeDI

Provides attribute based configuration of dependency injection services.

MR.AttributeDI

Provides attribute based configuration of dependency injection services.

CHANGELOG

Supported containers

MR.AttributeDI.ServiceCollection

Microsoft's IServiceCollection

MR.AttributeDI.Autofac

Autofac

Example using IServiceCollection

[AddToServices(Lifetime.Transient)] // This will register DefaultMath as self
[AddToServices(Lifetime.Transient, As = typeof(IMath))]
public class DefaultMath : IMath
{
    public int Add(int x, int y)
    {
        return x + y;
    }
}

using MR.AttributeDI.ServiceCollection;

services.ConfigureFromAttributes(typeof(Program).GetTypeInfo().Assembly); // Assemblies to search in

And then simply:

provider.GetService<IMath>();
provider.GetService<DefaultMath>():

Using tags

[AddToServices(Lifetime.Transient, Tags = "foo")]
public class DefaultMath
...

Here, DefaultMath won't be registered unless we specify its tag in configuration:

services.ConfigureFromAttributes(typeof(Program).GetTypeInfo().Assembly); // Will not register DefaultMath

services.ConfigureFromAttributes("foo", typeof(Program).GetTypeInfo().Assembly); // Will register DefaultMath

Multiple tags can be specified separated by a comma (for example "default, integration").

Forwarding

You can also forward service registrations for services where you want to share a single instance for multiple interfaces:

[AddToServices(Lifetime.Singleton, As = typeof(IFoo))]
[AddToServices(Lifetime.Singleton, As = typeof(IBar), ForwardTo = typeof(IFoo))]
public class SomeService : IFoo, IBar
{}