public async Task Run(
[ServiceBusTrigger("plate-read", "check-vignette", Connection = "SECCTRL_RECEIVE_PLATE_READ")] PlateRead plate,
ILogger log)
{
log.LogInformation($"Start vignette check for {plate.LicensePlate}");
var car = await storage.GetCarByLicensePlateAsync(plate.Nationality, plate.LicensePlate);
if (car != null)
{
if (car.Vignettes == null || !car.Vignettes.Any(v => plate.ReadTimestamp >= v.From && plate.ReadTimestamp <= v.Until))
{
log.LogInformation("Vignett violatation detected");
if (car.Violations == null)
{
car.Violations = new List <Violation>();
}
car.Violations.Add(new Violation(plate.ReadTimestamp, "Driving without vignette"));
await storage.UpdateCarAsync(car);
}
}
else
{
log.LogWarning("Car could not be found in DB");
// TODO: Handle unknown car; out of scope for this example
}
}
public static async Task Run(
[ServiceBusTrigger("plate-read", "section-control", Connection = "SECCTRL_RECEIVE_PLATE_READ")] PlateRead plate,
ILogger log,
[Inject(typeof(IStorage))] IStorage storage)
{
log.LogInformation($"Start section control check for {plate.LicensePlate}");
// Get car and camera from DB
log.LogInformation($"Get car and camera data from database");
var car = await storage.GetCarByLicensePlateAsync(plate.Nationality, plate.LicensePlate);
var camera = await storage.GetCameraByIDAsync(plate.CameraID);
if (camera.Start != null)
{
// License plate read is from a start of a section control
log.LogInformation("Processing entry into section control");
if (car.ActiveSection != null)
{
car.Violations.Add(new Violation(plate.ReadTimestamp, "Possible fraud, entered multiple times"));
}
else
{
car.ActiveSection = new Enter {
StartCameraID = camera.ID, Timestamp = plate.ReadTimestamp
};
}
}
else if (camera.End != null)
{
// License plate read is from an end of a section control
log.LogInformation("Processing exit from section control");
if (car.ActiveSection == null)
{
car.Violations.Add(new Violation(plate.ReadTimestamp, "Possible fraud, exit without enter"));
}
else if (camera.End.StartCameraID != car.ActiveSection.StartCameraID)
{
car.Violations.Add(new Violation(plate.ReadTimestamp, "Possible fraud, exit and start do not belong th the same section control"));
}
else
{
var averageSpeed = ((double)camera.End.DistanceFromStart) / 1000 / TimeSpan.FromTicks(plate.ReadTimestamp - car.ActiveSection.Timestamp).TotalHours;
if (averageSpeed > camera.End.MaximumAverageSpeed * 1.1d)
{
car.Violations.Add(new Violation(plate.ReadTimestamp, "Too fast"));
}
car.ActiveSection = null;
}
}
await storage.UpdateCarAsync(car);
}
public Task SetMatch(string id, [FromBody] PlateRead read)
{
var entry = _cache.Get(id) as IEnumerable <PlateRead>;
foreach (var r in entry)
{
if (r.TransactionId.Equals(read.TransactionId))
{
r.Match = PlateMatch.Match;
}
else
{
r.Match = PlateMatch.Unmatch;
}
}
return(Task.FromResult(entry));
}
public override async Task Start(StartRequest request, IServerStreamWriter <StartResponse> responseStream, ServerCallContext context)
{
logger.LogInformation("Эксперимент начинается");
var rand = new Random(42);
for (int i = 1; i <= request.CycleCount; ++i)
{
logger.LogInformation($"Отправка цикла {i}");
var plate = new PlateRead {
ExperimentalData = $"Эксперимент {request.ExperimentName}, шаг {i} из {request.CycleCount}: {rand.Next(100, 500000)}"
};
await responseStream.WriteAsync(new StartResponse { CycleNumber = i, Plate = plate });
var status = new StatusMessage {
PlateTemperature = rand.Next(25, 95)
};
await responseStream.WriteAsync(new StartResponse { CycleNumber = i, Status = status });
await Task.Delay(500);
}
logger.LogInformation("Эксперимент завершен");
}
public async Task Run(
[ServiceBusTrigger("plate-read", "check-vignette", Connection = "SECCTRL_RECEIVE_PLATE_READ")] PlateRead plate,
[SignalR(HubName = nameof(RealTimeUIHub))] IAsyncCollector <SignalRMessage> signalRMessages,
ILogger log)
{
log.LogInformation($"Start vignette check for {plate.LicensePlate}");
var car = await storage.GetCarByLicensePlateAsync(plate.Nationality, plate.LicensePlate);
if (car != null)
{
if (car.Vignettes == null || !car.Vignettes.Any(v => plate.ReadTimestamp >= v.From && plate.ReadTimestamp <= v.Until))
{
log.LogInformation("Vignett violatation detected");
if (car.Violations == null)
{
car.Violations = new List <Violation>();
}
car.Violations.Add(new Violation(plate.ReadTimestamp, "Driving without vignette"));
await storage.UpdateCarAsync(car);
await signalRMessages.AddAsync(new SignalRMessage
{
Target = "vignetteViolation",
Arguments = new [] { new
{
car.Nationality,
car.LicensePlate,
plate.CameraID
} }
});
}
}
else
{
log.LogWarning("Car could not be found in DB");
// TODO: Handle unknown car; out of scope for this example
}
}
public async Task <Message> Run(
[BlobTrigger("car-images/cameras/{camera}/{name}", Connection = "SECCTRL_CAR_IMAGES")] CloudBlockBlob imageBlob,
string camera,
string name,
ILogger log,
[OrchestrationClient] DurableOrchestrationClient orchestrationClient)
{
log.LogInformation($"Start processing of new image {name} from camera {camera}");
// Store timestamp when image was received in blob storage
var timestamp = imageBlob.Properties.LastModified;
// Read image file from blob storage and convert content to Base64
log.LogInformation("Downloading image data");
var file = new byte[imageBlob.Properties.Length];
await imageBlob.DownloadToByteArrayAsync(file, 0);
// Try to recognize the license plate
log.LogInformation("Starting license plate recognition");
var recognitionResult = await licensePlateRecognizer.RecognizeAsync(file, configuration);
// Move image to archive
log.LogInformation("Moving image to archive folder");
var archiveImageId = Guid.NewGuid().ToString();
var archiveBlob = imageBlob.Container.GetBlockBlobReference($"archive/{archiveImageId}.jpg");
await archiveBlob.StartCopyAsync(imageBlob);
await imageBlob.DeleteAsync();
log.LogInformation("Building plate read result");
if (recognitionResult != null)
{
// We have recognized a license plate
var read = new PlateRead
{
ReadTimestamp = timestamp.Value.Ticks,
CameraID = camera,
LicensePlate = recognitionResult.Plate,
Confidence = recognitionResult.Confidence,
Nationality = recognitionResult.Region,
NationalityConfidence = recognitionResult.RegionConfidence,
ImageID = archiveImageId
};
var readQuality = "low";
if (recognitionResult.Confidence >= 75d && recognitionResult.RegionConfidence >= 25d)
{
readQuality = "high";
}
if (readQuality == "low")
{
var instanceId = await orchestrationClient.StartNewAsync(
"OrchestrateRequestApproval",
new PlateReadApproval
{
Read = read
});
log.LogInformation($"Durable Function Ochestration started: {instanceId}");
}
return(CreateMessage(read, readQuality));
}
else
{
// No license plate found
var read = new EmptyPlateRead
{
ReadTimestamp = timestamp.Value.Ticks,
CameraID = camera,
ImageID = archiveImageId
};
return(CreateMessage(read, "empty"));
}
}
