private static async Task <SubscriberHost> SetupSubscriberHostAsync(CancellationTokenSource lifetimeCts)
{
using var securityDaemonClient = new SecurityDaemonClient();
// get server certificate to configure with
Console.WriteLine($"Configure server certificate");
(X509Certificate2 serverCert, X509Certificate2[] certChain) =
await securityDaemonClient.GetServerCertificateAsync().ConfigureAwait(false);
CertificateHelper.ImportCertificate(serverCert);
CertificateHelper.ImportIntermediateCAs(serverCert);
CertificateHelper.ImportIntermediateCAs(certChain);
// Configure client trust bundle
Console.WriteLine($"Configure client trust bundle");
var trustBundle = await securityDaemonClient.GetTrustBundleAsync();
CertificateHelper.ImportIntermediateCAs(trustBundle);
// start subscriber webhost
SubscriberHost host = new SubscriberHost(serverCert, lifetimeCts);
await host.StartAsync().ConfigureAwait(false);
return(host);
}
public static async Task Main()
{
var resetEvent = new ManualResetEventSlim();
// signals to long running components when to power down (either due to a Ctrl+C, or Ctrl-Break, or SIGTERM, or SIGKILL)
CancellationTokenSource lifetimeCts = SetupGracefulShutdown(resetEvent);
SubscriberHost host = SetupSubscriberHostAsync(lifetimeCts).GetAwaiter().GetResult();
IConfigurationSection hostConfigurationSection = GetHostConfigurationSection();
if (ShouldAutoCreateSubscription())
{
GridConfiguration gridConfig = GetGridConfiguration();
EventGridEdgeClient egClient = GetEventGridClientAsync(gridConfig).GetAwaiter().GetResult();
// certificate issued by IoT Edge takes a while to be current so will wait for a bit
Thread.Sleep(120 * 1000);
// wait for topic to exist
await WaitUntilEventGridModuleIsUpAndTopicExistsAsync(egClient, gridConfig.Topic.Name).ConfigureAwait(false);
// register subscription
await RegisterSubscriptionAsync(egClient, gridConfig).ConfigureAwait(false);
}
// wait until shutdown
await host.WaitForShutdownAsync().ConfigureAwait(false);
// signal to gracefully shutdown
resetEvent.Set();
}