// <summary>
/// This method creates a Polly retry policy when there is blob exception with code Unauthorized.
/// </summary>
/// <returns>The AsyncRetryPolicy</returns>
private AsyncRetryPolicy GetBlobRetryPolicy()
{
return(Policy.Handle <RequestFailedException>(e => (e.Status == (int)HttpStatusCode.Unauthorized || e.Status == (int)HttpStatusCode.Forbidden))
.RetryAsync(1, async(exception, retryCount) =>
{
try
{
await semaphoreSlim.WaitAsync().ConfigureAwait(false);
logger.LogInformation("Read the blob connection from KeyVault.");
// Get the latest blob connection key.
var blobConnectionSecret = await keyVaultClient.GetSecretAsync(configuration["KeyVaultUrl"], Constants.BlobConnection).ConfigureAwait(false);
logger.LogInformation("Refresh blob storage connection with upadated secret.");
blobStorageService.RefreshBlobServiceClient(blobConnectionSecret.Value);
}
finally
{
// release the semaphore
semaphoreSlim.Release();
}
}));
}