Microsoft Orleans Clustering Provider for ADO.NET

Introduction

Microsoft Orleans Clustering Provider for ADO.NET allows Orleans silos to organize themselves as a cluster using relational databases through ADO.NET. This provider enables silos to discover each other, maintain cluster membership, and detect and handle failures.

Getting Started

To use this package, install it via NuGet:

dotnet add package Microsoft.Orleans.Clustering.AdoNet

You will also need to install the appropriate database driver package for your database system:

• SQL Server: Microsoft.Data.SqlClient
• MySQL: MySql.Data or MySqlConnector
• PostgreSQL: Npgsql
• Oracle: Oracle.ManagedDataAccess.Core
• SQLite: Microsoft.Data.Sqlite

Example - Configuring ADO.NET Clustering

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

// 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 ADO.NET for clustering
            .UseAdoNetClustering(options =>
            {
                options.Invariant = "System.Data.SqlClient";  // Or other providers like "MySql.Data.MySqlClient", "Npgsql", etc.
                options.ConnectionString = "Server=localhost;Database=OrleansCluster;User Id=myUsername;******;";
            });
    });

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("World");

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

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