private static Tuple <ApplicationClientMetadata, ApplicationExtraMetadata> GetTransferMetadata(ApplicationSettings appSettings)
{
return(new Tuple <ApplicationClientMetadata, ApplicationExtraMetadata>(
new ApplicationClientMetadata
{
ApplicationID = appSettings.ApplicationID,
EventHubInteractionConnectionString = appSettings.InterEventHubSendConnectionString,
EventHubObservationConnectionString = appSettings.ObserEventHubSendConnectionString,
IsExplorationEnabled = appSettings.IsExplorationEnabled,
ModelBlobUri = appSettings.ModelBlobUri,
TrainArguments = appSettings.TrainArguments,
AppInsightsKey = appSettings.AppInsightsKey,
InitialExplorationEpsilon = appSettings.InitialExplorationEpsilon
},
new ApplicationExtraMetadata
{
AzureResourceGroupName = appSettings.AzureResourceGroupName,
DecisionType = appSettings.DecisionType,
ExperimentalUnitDuration = appSettings.ExperimentalUnitDuration,
SubscriptionId = appSettings.SubscriptionId,
ModelId = appSettings.ModelId,
TrainFrequency = appSettings.TrainFrequency,
SettingsTokenUri1 = appSettings.SettingsTokenUri1,
SettingsTokenUri2 = appSettings.SettingsTokenUri2
}
));
}
public static void CreateSettingsBlobIfNotExists(out string clSASTokenUri, out string webSASTokenUri)
{
clSASTokenUri = null;
webSASTokenUri = null;
var telemetry = new TelemetryClient();
var sasPolicy = new SharedAccessBlobPolicy
{
Permissions = SharedAccessBlobPermissions.Read,
SharedAccessStartTime = DateTime.UtcNow.AddMinutes(-1),
SharedAccessExpiryTime = DateTime.UtcNow.AddYears(1)
};
string azureStorageConnectionString = ConfigurationManager.AppSettings[AKConnectionString];
var storageAccount = CloudStorageAccount.Parse(azureStorageConnectionString);
var blobClient = storageAccount.CreateCloudBlobClient();
var settingsBlobContainer = blobClient.GetContainerReference(ApplicationBlobConstants.SettingsContainerName);
try
{
var modelBlobContainer = blobClient.GetContainerReference(ApplicationBlobConstants.ModelContainerName);
var clientSettingsBlob = settingsBlobContainer.GetBlockBlobReference(ApplicationBlobConstants.LatestClientSettingsBlobName);
var extraSettingsBlob = settingsBlobContainer.GetBlockBlobReference(ApplicationBlobConstants.LatestExtraSettingsBlobName);
if (!clientSettingsBlob.Exists() || !extraSettingsBlob.Exists())
{
telemetry.TrackTrace("Settings blob not found, creating new one.");
settingsBlobContainer.CreateIfNotExists();
modelBlobContainer.CreateIfNotExists();
// Create an empty model blob to generate SAS token for
var modelBlob = modelBlobContainer.GetBlockBlobReference(ApplicationBlobConstants.LatestModelBlobName);
modelBlob.UploadText(string.Empty);
var modelSASToken = modelBlob.GetSharedAccessSignature(sasPolicy);
var appSettings = new ApplicationSettings
{
ApplicationID = ConfigurationManager.AppSettings[AKAzureResourceGroup],
AzureResourceGroupName = ConfigurationManager.AppSettings[AKAzureResourceGroup],
ConnectionString = ConfigurationManager.AppSettings[AKConnectionString],
ExperimentalUnitDuration = Convert.ToInt32(ConfigurationManager.AppSettings[AKExpUnitDuration]),
InterEventHubSendConnectionString = ConfigurationManager.AppSettings[AKInterEHSendConnString],
ObserEventHubSendConnectionString = ConfigurationManager.AppSettings[AKObserEHSendConnString],
IsExplorationEnabled = true,
SubscriptionId = ConfigurationManager.AppSettings[AKSubscriptionId],
DecisionType = DecisionType.MultiActions, // TODO: update depending on deployment option
ModelId = ApplicationSettingConstants.UseLatestModelSetting,
TrainArguments = ConfigurationManager.AppSettings[AKTrainArguments],
TrainFrequency = TrainFrequency.High, // TODO: update depending on deployment option
ModelBlobUri = modelBlob.Uri + modelSASToken,
AppInsightsKey = ConfigurationManager.AppSettings[AKAppInsightsKey],
InitialExplorationEpsilon = Convert.ToSingle(ConfigurationManager.AppSettings[AKInitialExplorationEpsilon])
};
UpdateMetadata(clientSettingsBlob, extraSettingsBlob, appSettings);
var clSASToken = clientSettingsBlob.GetSharedAccessSignature(sasPolicy);
var webSASToken = clientSettingsBlob.GetSharedAccessSignature(sasPolicy);
clSASTokenUri = clientSettingsBlob.Uri + clSASToken;
webSASTokenUri = clientSettingsBlob.Uri + webSASToken;
appSettings.SettingsTokenUri1 = clSASTokenUri;
appSettings.SettingsTokenUri2 = webSASTokenUri;
UpdateMetadata(clientSettingsBlob, extraSettingsBlob, appSettings);
telemetry.TrackTrace($"Model blob uri: {appSettings.ModelBlobUri}");
}
else
{
telemetry.TrackTrace("Settings blob already exists, skipping.");
var extraMetadata = JsonConvert.DeserializeObject <ApplicationExtraMetadata>(extraSettingsBlob.DownloadText());
clSASTokenUri = extraMetadata.SettingsTokenUri1;
webSASTokenUri = extraMetadata.SettingsTokenUri2;
}
telemetry.TrackTrace($"Settings blob uri for client library: {clSASTokenUri}, for web api: {webSASTokenUri}");
}
catch (Exception ex)
{
telemetry.TrackException(ex);
}
}
public static void UpdateMetadata(CloudBlockBlob clientSettingsBlob, CloudBlockBlob extraSettingsBlob, ApplicationSettings appSettings)
{
try
{
var metadata = GetTransferMetadata(appSettings);
clientSettingsBlob.UploadText(JsonConvert.SerializeObject(metadata.Item1));
extraSettingsBlob.UploadText(JsonConvert.SerializeObject(metadata.Item2));
}
catch (Exception ex)
{
Trace.TraceError(ex.ToString());
}
}