/// <summary>
/// Puts the benchmark results of the given experiment to the storage.
/// </summary>
/// <param name="results">All results must have same experiment id.
/// <returns>Blob etag, if results have been uploaded.
/// Null, if the precondition failed and nothing was uploaded.</returns>
public async Task <string> PutAzureExperimentResults(int expId, AzureBenchmarkResult[] results, UploadBlobMode mode, string etag = null)
{
string fileName = GetResultsFileName(expId);
using (MemoryStream zipStream = new MemoryStream())
{
using (var zip = new ZipArchive(zipStream, ZipArchiveMode.Create, true))
{
var entry = zip.CreateEntry(fileName);
AzureBenchmarkResult.SaveBenchmarks(results, entry.Open());
}
zipStream.Position = 0;
return(await UploadBlobAsync(resultsContainer, GetResultBlobName(expId), zipStream, mode, etag));
}
}
/// <summary>
/// If blob uploaded, returns its etag; otherwise, if precondition failed for the mode, returns null.
/// </summary>
private static async Task <string> UploadBlobAsync(CloudBlobContainer container, string blobName, Stream content, UploadBlobMode mode, string etag = null)
{
if (mode == UploadBlobMode.ReplaceExact && etag == null)
{
throw new ArgumentException("Etag must be provided when using ReplaceExact mode");
}
try
{
var stdoutBlob = container.GetBlockBlobReference(blobName);
AccessCondition accessCondition;
switch (mode)
{
case UploadBlobMode.CreateNew:
accessCondition = AccessCondition.GenerateIfNotExistsCondition();
break;
case UploadBlobMode.CreateOrReplace:
accessCondition = AccessCondition.GenerateEmptyCondition();
break;
case UploadBlobMode.ReplaceExact:
accessCondition = AccessCondition.GenerateIfMatchCondition(etag);
break;
default:
throw new ArgumentException("Unknown mode");
}
await stdoutBlob.UploadFromStreamAsync(content,
accessCondition,
new BlobRequestOptions()
{
RetryPolicy = new Microsoft.WindowsAzure.Storage.RetryPolicies.ExponentialRetry(TimeSpan.FromMilliseconds(100), 14)
},
null);
return(stdoutBlob.Properties.ETag);
}
catch (StorageException ex) when(ex.RequestInformation.HttpStatusCode == (int)HttpStatusCode.PreconditionFailed)
{
return(null);
}
catch (StorageException ex)
{
Trace.WriteLine(string.Format("Failed to upload text to the blob: {0}, blob name: {1}, response code: {2}", ex.Message, blobName, ex.RequestInformation.HttpStatusCode));
throw;
}
}
