public DeviceTableEntity(DeviceDocument deviceDoc)
{
this.PartitionKey = deviceDoc.GatewayName;
this.RowKey = deviceDoc.DeviceName;
this.Timestamp = DateTime.UtcNow;
this.DeviceDoc = deviceDoc;
this.Text = JsonConvert.SerializeObject(deviceDoc);
}
public static async Task HandleMessageBatch(
List <BACNetIoTHubMessage> messageBatch,
List <DeviceDocument> knownDeviceDocuments,
IAsyncCollector <DeviceDocument> deviceDocumentsWriteCollector,
IAsyncCollector <string> eventCollector,
IAsyncCollector <DeviceTableEntity> unprovisionedDeviceCollector,
ILogger log,
CancellationToken cancellationToken)
{
List <string> unprovisioned = new List <string>();
foreach (var bacNetIoTHubMsg in messageBatch)
{
if (cancellationToken.IsCancellationRequested)
{
log.LogWarning("Function was cancelled.");
break;
}
DeviceDocument deviceDoc = GetKnownOrNewDeviceDoc(knownDeviceDocuments, bacNetIoTHubMsg.BACNetMsg.name);
//update the device doc with inbound telemetry (value, timestamp, status, etc.)
deviceDoc = ApplyTelemetryToDeviceDoc(bacNetIoTHubMsg, deviceDoc);
//UpSERT the device document to Cosmos
await deviceDocumentsWriteCollector.AddAsync(deviceDoc, cancellationToken);
if (String.Equals(deviceDoc.DeviceStatus, DEVICE_STATUS_UNPROVISIONED, StringComparison.OrdinalIgnoreCase))
{ //Handle Unprovisioned Devices here
unprovisioned.Add(bacNetIoTHubMsg.BACNetMsg.name);
await unprovisionedDeviceCollector.AddAsync(new DeviceTableEntity(bacNetIoTHubMsg), cancellationToken);
}
else
{
//Provisioned Device only code
await eventCollector.AddAsync(JsonConvert.SerializeObject(deviceDoc), cancellationToken);
}
}
if (unprovisioned.Any())
{
Interlocked.Increment(ref unprovisionedCount);
log.LogError($"Unprovisioned DeviceIds encountered: {String.Join(',', unprovisioned)} ");
}
}
private static DeviceDocument GetKnownOrNewDeviceDoc(
List <DeviceDocument> knownDeviceDocuments,
string deviceId)
{
//Lookup Known Devices in CosmosDB by Id
var deviceDoc = knownDeviceDocuments.SingleOrDefault(
document => document.id == deviceId);
if (deviceDoc == null) //not found, so create a new one and mark it unprovisioned
{
deviceDoc = new DeviceDocument()
{
id = deviceId,
DeviceStatus = DEVICE_STATUS_UNPROVISIONED
};
}
return(deviceDoc);
}
public static DeviceDocument ApplyTelemetryToDeviceDoc(
BACNetIoTHubMessage bacNetIoTHubMessage,
DeviceDocument inputDeviceDocument)
{
//Todo figure out how this function becomes modularized/configurable
var parsedDeviceName = ((string)bacNetIoTHubMessage.BACNetMsg.name).Split('_');
string unparsedValue = bacNetIoTHubMessage.BACNetMsg.value.ToString();
(string value, string unit) = ParseValueUnit(unparsedValue, parsedDeviceName[2]);
inputDeviceDocument.PresentValue = value;
inputDeviceDocument.ValueUnits = unit;
inputDeviceDocument.DeviceTimestamp = DateTimeOffset.Parse((string)bacNetIoTHubMessage.BACNetMsg.timestamp, styles: DateTimeStyles.RoundtripKind);
//preserve Unprovisioned status
if (!String.Equals(inputDeviceDocument.DeviceStatus, DEVICE_STATUS_UNPROVISIONED, StringComparison.OrdinalIgnoreCase))
{
inputDeviceDocument.DeviceStatus = bacNetIoTHubMessage.BACNetMsg.status;
}
inputDeviceDocument.EventEnqueuedUtcTime = bacNetIoTHubMessage.SystemProperties?.EnqueuedTimeUtc ?? DateTime.UtcNow;
return(inputDeviceDocument);
}
