[CommandHandler] // Note that ICommandHandler<RecSumCommand, long> support isn't needed
private async Task <long> RecSum(
RecSumCommand command,
IServiceProvider services, // Resolved via CommandContext.Services
ICommander commander, // Resolved via CommandContext.Services
CancellationToken cancellationToken)
{
var context = CommandContext.GetCurrent();
Debug.Assert(services == context.Services); // context.Services is a scoped IServiceProvider
Debug.Assert(commander == services.Commander()); // ICommander is singleton
Debug.Assert(services != commander.Services); // Scoped IServiceProvider != top-level IServiceProvider
WriteLine($"Numbers: {command.Numbers.ToDelimitedString()}");
// Each call creates a new CommandContext
var contextStack = new List <CommandContext>();
var currentContext = context;
while (currentContext != null)
{
contextStack.Add(currentContext);
currentContext = currentContext.OuterContext;
}
WriteLine($"CommandContext stack size: {contextStack.Count}");
Debug.Assert(contextStack[^ 1] == context.OutermostContext);
