.NET8依赖注入新特性Keyed services

using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.SignalR;


var builder = WebApplication.CreateBuilder(args);


builder.Services.AddKeyedSingleton<ICache, BigCache>("big");
builder.Services.AddKeyedSingleton<ICache, SmallCache>("small");
builder.Services.AddControllers();


var app = builder.Build();


app.MapGet("/big", ([FromKeyedServices("big")] ICache bigCache) => bigCache.Get("date"));
app.MapGet("/small", ([FromKeyedServices("small")] ICache smallCache) =>
                                                               smallCache.Get("date"));


app.MapControllers();


app.Run();


public interface ICache
{
    object Get(string key);
}
public class BigCache : ICache
{
    public object Get(string key) => $"Resolving {key} from big cache.";
}


public class SmallCache : ICache
{
    public object Get(string key) => $"Resolving {key} from small cache.";
}


[ApiController]
[Route("/cache")]
public class CustomServicesApiController : Controller
{
    [HttpGet("big-cache")]
    public ActionResult<object> GetOk([FromKeyedServices("big")] ICache cache)
    {
        return cache.Get("data-mvc");
    }
}


public class MyHub : Hub
{
    public void Method([FromKeyedServices("small")] ICache cache)
    {
        Console.WriteLine(cache.Get("signalr"));
    }
}

[Inject(Key = "my-service")]
public IMyService MyService { get; set; }