SignalR.Orleans 1.0.6

Configuration

Silo

We need to configure the Orleans Silo with the below:

• Use .UseSignalR() on ISiloHostBuilder.

Example

var silo = new SiloHostBuilder()
    .UseSignalR() 
    .Build();
await silo.StartAsync();

Client

Now your SignalR application needs to connect to the Orleans Cluster by using an Orleans Client:

• Use .UseSignalR() on IClientBuilder.

Example

var client = new ClientBuilder()
    .UseSignalR()
    .Build();
    await client.Connect();

Somewhere in your Startup.cs:

• Use .AddSignalR() on IServiceCollection (this is part of Microsoft.AspNetCore.SignalR nuget package).
• Use AddOrleans() on .AddSignalR().

Example

public void ConfigureServices(IServiceCollection services)
{
    ...
    services
        .AddSignalR()
        .AddOrleans();
    ...
}

Great! Now you have SignalR configured and Orleans SignalR backplane built in Orleans!

Features

Hub Context

HubContext gives you the ability to communicate with the client from orleans grains (outside the hub).

Sample usage: Receiving server push notifications from message brokers, web hooks, etc. Ideally first update your grain state and then push signalr message to the client.

Example:

public class UserNotificationGrain : Grain<UserNotificationState>, IUserNotificationGrain
{
	private HubContext<IUserNotificationHub> _hubContext;

	public override async Task OnActivateAsync()
	{
		_hubContext = GrainFactory.GetHub<IUserNotificationHub>();
		// some code...
		await _hubContext.User(this.GetPrimaryKeyString()).SendSignalRMessage("Broadcast", State.UserNotification);
	}
}