Is it possible to provide a more semantically clear singleton Grain without specifying any key, such as IGrainWithSingleton?

[paxhujing]

public interface IConfigurationGrarin : IGrainWithSingleton
{
...
}

var singleton = GrainFactory.GetGrain<IConfigurationGrarin>();

[EdeMeijer]

How about something like this?

public interface ISingletonGrain : IGrainWithGuidKey;

public static class GrainFactoryExtensions
{
    public static T GetGrain<T>(this IGrainFactory factory) where T : ISingletonGrain
    {
        return factory.GetGrain<T>(Guid.Empty);
    }
}

[paxhujing]

How about something like this?

public interface ISingletonGrain : IGrainWithGuidKey;

public static class GrainFactoryExtensions
{
    public static T GetGrain<T>(this IGrainFactory factory) where T : ISingletonGrain
    {
        return factory.GetGrain<T>(Guid.Empty);
    }
}

It would be even better if Orleans could provide built-in semantic support for this!

[paxhujing]

Have team considered adding this feature in a future version?

[ReubenBond]

Yes, and I believe this will be much easier once we merge #9539