Orleans localhost demo

Program.cs

using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Orleans;
using Orleans.Hosting;
using System;
using System.Threading;
using System.Threading.Tasks;

namespace SimpleDemo
{
    class Program
    {
        static async Task Main(string[] args)
        {
            await Host.CreateDefaultBuilder()
                .UseOrleans(siloBuilder => siloBuilder.UseLocalhostClustering())
                .ConfigureServices(s => s.AddSingleton<IHostedService, MyHostedService>())
                .RunConsoleAsync();
        }
    }

    public class MyHostedService : BackgroundService
    {
        private readonly IGrainFactory grainFactory;

        public MyHostedService(IGrainFactory grainFactory)
        {
            this.grainFactory = grainFactory;
        }

        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
        {
            while (!stoppingToken.IsCancellationRequested)
            {
                await this.grainFactory.GetGrain<IEmptyGrain>(Guid.Empty).NoOp();
                await Task.Delay(1000);
            }
        }
    }

    public class EmptyGrain : Grain, IEmptyGrain
    {
        private readonly ILogger log;

        public EmptyGrain(ILogger<EmptyGrain> log) => this.log = log;
        public Task NoOp()
        {
            this.log.LogInformation("beep");
            return Task.CompletedTask;
        }
    }

    public interface IEmptyGrain : IGrainWithGuidKey
    {
        Task NoOp();
    }
}

SimpleDemo.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp3.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.Extensions.Hosting" Version="3.1.1" />
    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="3.1.1" />
    <PackageReference Include="Microsoft.Orleans.CodeGenerator.MSBuild" Version="3.0.2">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
    <PackageReference Include="Microsoft.Orleans.Server" Version="3.0.2" />
  </ItemGroup>

</Project>