dotnet add package Microsoft.Orleans.Clustering.DynamoDB

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

namespace ExampleGrains;

// Define a grain interface
public interface IHelloGrain : IGrainWithStringKey
{
    Task<string> SayHello(string greeting);
}

// Implement the grain interface
public class HelloGrain : Grain, IHelloGrain
{
    public Task<string> SayHello(string greeting)
    {
        return Task.FromResult($"Hello, {greeting}!");
    }
}

var builder = Host.CreateApplicationBuilder(args)
    .UseOrleans(siloBuilder =>
    {
        siloBuilder
            // Configure DynamoDB clustering
            .UseDynamoDBClustering(options =>
            {
                options.AccessKey = "YOUR_AWS_ACCESS_KEY";
                options.SecretKey = "YOUR_AWS_SECRET_KEY";
                options.Region = "us-east-1";
                options.TableName = "OrleansClusteringTable";
                options.CreateIfNotExists = true;
            });
    });

var host = builder.Build();
await host.StartAsync();

// Get a reference to a grain and call it
var client = host.Services.GetRequiredService<IClusterClient>();
var grain = client.GetGrain<IHelloGrain>("user123");
var response = await grain.SayHello("DynamoDB");

// Print the result
Console.WriteLine($"Grain response: {response}");

// Keep the host running until the application is shut down
await host.WaitForShutdownAsync();