Register services with ImplementationFactory

[LeonxPRO]

Hello!
First, thanks for a Scrutor)
Is it any way for register services with ImplementationFactory, like in native IServiceCollectionmethod ?
AddSingleton<TService>(Func<IServiceProvider, TService> implementationFactory)
I imagine that like:

IServiceCollection collection = _serviceCollection.Scan(scan => scan.FromAssemblies(ass)
.AddClasses(classes => classes.AssignableTo<TService>(), false)
.AsImplementedInterfaces()
.WithSingletonLifetime(Func<IServiceProvider, TService> implementationFactory))

instead WithSingletonLifetime()

[khellang]

Hello @LeonxPRO! 👋🏻

The issue with providing a factory like that is that it needs to work for all subtypes of TService, so you it would also have to know the specific type that it's trying to register in the callback.

I'd love to know a bit more about what you're trying to do. Do you have a concrete example?

[carlhoogstoel]

Sample is pretty straighforward, just have a bunch of classes that have the same interface for wich you want to have a property filled during creation.

.WithSingletonLifetime(Func<IServiceProvider, TService> implementationFactory)) would be awesome :)

[kdrcetintas]

Any progress on this one? Basically it would be nice to get a callback for instance creation; (IServiceProvider, Type concreteType)

[pfeigl]

We also would have loved to register a bunch of classes with an ImplementationFactory. The usecase for us is pretty straight forward: The classes are from a external library and do not really support DI as we need to call a method on each of the classes right after initialization.

Find some sample code attached and how we use it currently:

    private static IServiceCollection AddReportPlugin<TPlugin>(this IServiceCollection serviceCollection) where TPlugin : ReportPluginBase, IReportPlugin, new()
    {
        serviceCollection.AddScoped<IReportPlugin, TPlugin>(sp =>
        {
            var plugin = new TPlugin();
            var pluginParameter = sp.GetRequiredService<IPluginParameters>();
            plugin.Initialize(pluginParameter);
            return plugin;
        });

        return serviceCollection;
    }

// ---

serviceCollection.AddReportPlugin<ExternalPlugin>()

Beeing able to simple search for all IReportPlugin implementations and calling AddReportPlugin as factory for each of them would help alot.