static void ThrowIfConnectionStringAndTokenProviderSpecified(DataBusSettings dataBusSettings)
{
if (dataBusSettings.StorageAccountName != null && dataBusSettings.UserProvidedConnectionString)
{
throw new Exception("More than one authentication method to Azure Service was supplied (using connection string and Managed Identity). Use one method only.");
}
}
public BlobStorageDataBus(CloudBlobContainer container, DataBusSettings settings, IAsyncTimer timer)
{
this.container = container;
this.settings = settings;
this.timer = timer;
retryPolicy = new ExponentialRetry(TimeSpan.FromSeconds(settings.BackOffInterval), settings.MaxRetries);
}
static CloudBlobContainer CreateCloudBlobContainer(DataBusSettings dataBusSettings)
{
CloudBlobContainer container;
// Attempt managed identity identity first
if (!string.IsNullOrWhiteSpace(dataBusSettings.StorageAccountName))
{
var azureServiceTokenProvider = new AzureServiceTokenProvider();
var state = (azureServiceTokenProvider, dataBusSettings);
var tokenAndFrequency = TokenRenewerAsync(state, CancellationToken.None).GetAwaiter().GetResult();
var tokenCredential = new TokenCredential(tokenAndFrequency.Token, TokenRenewerAsync, state, tokenAndFrequency.Frequency.Value);
var storageCredentials = new StorageCredentials(tokenCredential);
var containerPath = $"https://{dataBusSettings.StorageAccountName}.blob.{dataBusSettings.EndpointSuffix}/{dataBusSettings.Container}";
container = new CloudBlobContainer(new StorageUri(new Uri(containerPath)), storageCredentials);
}
else // fallback to connection string
{
var cloudBlobClient = CloudStorageAccount.Parse(dataBusSettings.ConnectionString).CreateCloudBlobClient();
container = cloudBlobClient.GetContainerReference(dataBusSettings.Container);
}
return(container);
}
