public async Task Run([TimerTrigger("5 * * * * *")] TimerInfo myTimer)
{
_logger.LogInformation($"C# Timer trigger function executed at: {DateTime.Now}");
// Authenticate to Azure Storage
try
{
CloudBlobClient cloudBlobClient = _azureStorageHelpers.ConnectToBlobClient(_config[Settings.STORAGE_ACCOUNT_NAME], _config[Settings.STORAGE_ACCOUNT_KEY]);
CloudBlobContainer modelCloudBlobContainer = _azureStorageHelpers.GetBlobContainer(cloudBlobClient, _config[Settings.MODEL_CONTAINER_NAME]);
// Read File From Azure Storage
string _trainDataPath = Path.Combine(Environment.CurrentDirectory, "Data", "taxi-fare-train.csv");
string _testDataPath = Path.Combine(Environment.CurrentDirectory, "Data", "taxi-fare-test.csv");
string modelPath = _config[Settings.MODEL_PATH];
// Add Data to IDataView and Train Model
await TrainAndSaveModel(_mlContext, _trainDataPath, _testDataPath, modelPath, modelCloudBlobContainer);
_logger.LogInformation($"The model has been uploaded to {modelCloudBlobContainer.Name}. Saved as {modelPath}");
}
catch (Exception ex)
{
_logger.LogError($"Exception thrown: {ex.Message}");
throw;
}
}
public async Task Run([CosmosDBTrigger(
databaseName: "TelementryDB",
collectionName: "DeviceReading",
ConnectionStringSetting = "COSMOS_CONNECTION_STRING",
LeaseCollectionName = "leases",
CreateLeaseCollectionIfNotExists = true)] IReadOnlyList <Document> input)
{
try
{
List <DeviceReading> backupDocuments = new List <DeviceReading>();
CloudBlobClient cloudBlobClient = _azureStorageHelpers.ConnectToBlobClient(
_config[Constants.STORAGE_ACCOUNT_NAME],
_config[Constants.STORAGE_ACCOUNT_KEY]);
CloudBlobContainer blobContainer = _azureStorageHelpers.GetBlobContainer(
cloudBlobClient,
_config[Constants.STORAGE_CONTAINER]);
string backupFile = Path.Combine($"{DateTime.Now.ToString("dd-MM-yyyy")}-backup.json");
if (input != null && input.Count > 0)
{
foreach (var document in input)
{
// Persist to blob storage
var deviceReading = JsonConvert.DeserializeObject <DeviceReading>(document.ToString());
backupDocuments.Add(deviceReading);
_logger.LogInformation($"{document.Id} has been added to list");
}
}
var jsonData = JsonConvert.SerializeObject(backupDocuments);
using (StreamWriter file = File.CreateText(backupFile))
{
JsonSerializer serializer = new JsonSerializer();
serializer.Serialize(file, jsonData);
}
await _azureStorageHelpers.UploadBlobToStorage(blobContainer, backupFile);
}
catch (Exception ex)
{
_logger.LogWarning($"Something went wrong. Exception thrown: {ex.Message}");
throw;
}
}