private Task desiredPropertyUpdateCallback(TwinCollection desiredProperties, object userContext)
{
//handle Twin Updates with the aad client helper
_aadClientHelper.ProcessTwinUpdate(desiredProperties);
return(Task.CompletedTask);
}
protected override async Task ExecuteAsync(CancellationToken stopToken)
{
_logger.LogInformation("Starting IoT Edge Module Client");
try
{
AmqpTransportSettings amqpSetting = new AmqpTransportSettings(TransportType.Amqp_Tcp_Only);
ITransportSettings[] settings = { amqpSetting };
// Open a connection to the Edge runtime
EdgeHubModuleClient = await ModuleClient.CreateFromEnvironmentAsync(settings);
await EdgeHubModuleClient.OpenAsync();
//create the AAD Client Helper class
_aadClientHelper = new AADClientHelper(EdgeHubModuleClient, _logger);
_logger.LogInformation("IoT Hub module client initialized.");
_logger.LogInformation("Registering Desired Property Update callback.");
await EdgeHubModuleClient.SetDesiredPropertyUpdateCallbackAsync(desiredPropertyUpdateCallback, null);
//and perform at load time a get twin
var twins = await EdgeHubModuleClient.GetTwinAsync(stopToken);
//handle Twin Updates with the aad client helper
_aadClientHelper.ProcessTwinUpdate(twins);
string token = null;
while (!stopToken.IsCancellationRequested)
{
//simple test ... GET an AAD TOKEN
if (token == null)
{
token = await _aadClientHelper.GetAADToken(stopToken);
}
await Task.Delay(10000);
}
}
catch (Exception ex)
{
_logger.LogError(ex, "Error while initializing IoT Edge Module Client");
await Program.Host.StopAsync();
}
_logger.LogInformation("Stopping IoT Edge Module Client");
}