MAUI & Blazor

.NET MAUI

Store state in SQLite through Shiny.DocumentDb:

builder.Services.AddShinyActors(actors => actors.UseDocumentDb(
    new SqliteDatabaseProvider($"Data Source={Path.Combine(FileSystem.AppDataDirectory, "actors.db")}")
));

The OS can kill a backgrounded app without warning. Either use [AutoSave] (or actors.UseAutoSave() for every actor), so nothing ever lives only in memory, or flush when the app sleeps:

protected override async void OnSleep() => await actorSystem.DeactivateAllAsync();   // ActorSystem from DI

• Reminders while the app is suspended: UseBackgroundReminders().
• Reminders on time even when the app is dead: UseReminderNotifications().
• Sharing actors with nearby devices: serve them over HTTP and advertise them over mDNS.

SQLite on Android

Pin a patched SQLitePCLRaw per platform, and don’t add the plain SQLitePCLRaw.lib.e_sqlite3 to an Android target. See the note under Shiny.DocumentDb.

Blazor WebAssembly

Actors run in the browser too. Store state in IndexedDB through Shiny.DocumentDb. Because the IndexedDB store is created by the container, call UseDocumentDb() with no arguments:

builder.Services.AddSingleton<IDocumentStore>(sp =>
{
    var options = new IndexedDbDocumentStoreOptions
    {
        DatabaseName = "my-app",
        JsonSerializerOptions = new JsonSerializerOptions { TypeInfoResolver = ActorDocumentsJsonContext.Default },
        UseReflectionFallback = false
    };
    return new IndexedDbDocumentStore(options.MapActorDocuments(), sp);
});

builder.Services.AddShinyActors(x => x.UseDocumentDb());   // the IndexedDB store registered above

Reminders fire while the tab is open. A remote client works from the browser as well, as long as the server allows the page’s origin.