public static async Task DeleteDeviceInExternalSystemActivity([ActivityTrigger] DeviceDeleteOrchestrationInput input, TraceWriter log)
{
var externalDeviceRegistry = Utils.ResolveExternalDeviceRegistry();
var deviceId = input.Device["deviceId"].ToString();
try
{
await externalDeviceRegistry.DeleteExternalDevice(input.Device);
log.Info($"Device '{deviceId}' from IoT Hub '{input.IoTHubName}' deleted");
Utils.TelemetryClient?.TrackEvent(Utils.Event_ExternalDeviceDeleted, new Dictionary <string, string>()
{
{ "deviceId", deviceId },
{ "iothubname", input.IoTHubName }
});
}
catch (Exception ex)
{
log.Error($"Failed to device {deviceId} from IoT Hub '{input.IoTHubName}': {ex.Message}");
Utils.TelemetryClient?.TrackEvent(Utils.Event_ExternalDeviceDeletionError, new Dictionary <string, string>()
{
{ "deviceId", deviceId },
{ "iothubname", input.IoTHubName },
{ "errorMessage", ex.Message },
});
throw;
}
}
public static async Task <HttpResponseMessage> ExternalRegistrySynchronizer_EventGridListener(
[HttpTrigger(AuthorizationLevel.Anonymous, "get", "post")] HttpRequestMessage req,
[OrchestrationClient] DurableOrchestrationClient starter,
TraceWriter log)
{
var eventGridResponse = await Utils.HandleEventGridRequest(req);
if (eventGridResponse != null)
{
return(eventGridResponse);
}
var orchestrationInstances = new List <string>();
var payload = await req.Content.ReadAsStringAsync();
var events = JsonConvert.DeserializeObject <List <JObject> >(payload);
if (events != null)
{
var externalDeviceRegistry = Utils.ResolveExternalDeviceRegistry();
foreach (var gridEvent in events)
{
var data = gridEvent["data"];
var deviceId = data["deviceId"].ToString();
var iotHubName = data["hubName"].ToString();
var operationType = data["opType"].ToString();
switch (operationType.ToLowerInvariant())
{
case "devicecreated":
{
var twinProperties = new Dictionary <string, string>();
if (data["twin"]?["tags"] != null)
{
var deviceTwinTags = data["twin"]["tags"];
foreach (var requiredProperty in externalDeviceRegistry.GetRequiredTwinProperties())
{
if (deviceTwinTags[requiredProperty] != null)
{
twinProperties.Add(requiredProperty, deviceTwinTags[requiredProperty].ToString());
}
else
{
twinProperties.Clear();
break;
}
}
}
// create device if all properties are there
if (twinProperties.Count > 0)
{
try
{
externalDeviceRegistry.ValidateTwinProperties(twinProperties);
// Create the device if all properties are there
await CreateExternalDeviceActivity(new CreateExternalDeviceInput()
{
DeviceId = deviceId,
IotHubName = iotHubName,
Properties = twinProperties
},
log);
}
catch (Exception ex)
{
log.Warning($"Direct device creation for device {deviceId} in iothub {iotHubName} failed, starting an orchestration. {ex.ToString()}");
// failed to create the device immediately, starts an orchestration to retry more times
var deviceForwarderRequest = new DeviceCreateOrchestrationInput(deviceId, iotHubName);
var instanceId = await starter.StartNewAsync(nameof(ExternalRegistrySynchronizer_CreateDeviceOrchestration), deviceForwarderRequest);
orchestrationInstances.Add(instanceId);
}
}
else
{
// Otherwise start orchestration to wait until the device twin properties exist
var deviceForwarderRequest = new DeviceCreateOrchestrationInput(deviceId, iotHubName);
var instanceId = await starter.StartNewAsync(nameof(ExternalRegistrySynchronizer_CreateDeviceOrchestration), deviceForwarderRequest);
orchestrationInstances.Add(instanceId);
}
break;
}
case "devicedeleted":
{
var deleteDeviceInput = new DeviceDeleteOrchestrationInput(data, iotHubName);
try
{
await DeleteDeviceInExternalSystemActivity(deleteDeviceInput, log);
}
catch (Exception ex)
{
log.Warning($"Direct device delete for device {deviceId} in iothub {iotHubName} failed, starting an orchestration. {ex.ToString()}");
// failed to delete the device, starts an orchestration to retry more times
var instanceId = await starter.StartNewAsync(nameof(ExternalRegistrySynchronizer_DeleteDeviceOrchestration), deleteDeviceInput);
orchestrationInstances.Add(instanceId);
}
break;
}
}
}
}
if (orchestrationInstances.Count == 1)
{
return(starter.CreateCheckStatusResponse(req, orchestrationInstances.First()));
}
var res = new HttpResponseMessage(System.Net.HttpStatusCode.OK);
return(res);
}
