public Task <BlobIdentifierWithBlocks> UploadLogToBlobStore(Stream blob, string hubName, Guid planId, int logId)
{
var blockBlobId = VsoHash.CalculateBlobIdentifierWithBlocks(blob);
blob.Position = 0;
using (var reader = new StreamReader(blob))
{
var text = reader.ReadToEnd();
var lines = text.Split("\n");
UploadedLogBlobs.Add(blockBlobId, lines);
}
return(Task.FromResult(blockBlobId));
}
/// <summary>
/// Alternative for UploadAndReferenceBlobAsync that uses WalkBlocksAsync instead of the synchronous WalkBlocks.
/// Also utilizes the AsyncHttpRetryHelper to mitigate transient exceptions.
/// </summary>
public static Task UploadAndReferenceBlobWithRetriesAsync(
this IBlobStoreHttpClient client,
BlobIdentifier blobId,
Stream stream,
BlobReference reference,
Context context,
CancellationToken cts)
{
Contract.Requires(stream != null);
var attempt = 0;
return(AsyncHttpRetryHelper.InvokeVoidAsync(
async() =>
{
bool blobUploaded = false;
stream.Position = 0;
attempt++;
await VsoHash.WalkBlocksAsync(
stream,
blockActionSemaphore: null,
multiBlocksInParallel: true,
singleBlockCallback:
async(block, blockLength, blockHash) =>
{
await client.PutSingleBlockBlobAndReferenceAsync(
blobId, block, blockLength, reference, cts).ConfigureAwait(false);
blobUploaded = true;
},
multiBlockCallback:
(block, blockLength, blockHash, isFinalBlock) =>
client.PutBlobBlockAsync(blobId, block, blockLength, cts),
multiBlockSealCallback: async blobIdWithBlocks =>
{
var failedRefs = await client.TryReferenceWithBlocksAsync(
new Dictionary <BlobIdentifierWithBlocks, IEnumerable <BlobReference> >
{
{ blobIdWithBlocks, new[] { reference } }
},
cancellationToken: cts).ConfigureAwait(false);
blobUploaded = !failedRefs.Any();
}
);
if (!blobUploaded)
{
throw new AsyncHttpRetryHelper.RetryableException($"Could not upload blob on attempt {attempt}.");
}
},
maxRetries: 5,
tracer: new AppTraceSourceContextAdapter(context, "BlobStoreHttpClient", SourceLevels.All),
canRetryDelegate: exception =>
{
// HACK HACK: This is an additional layer of retries specifically to catch the SSL exceptions seen in DM.
// Newer versions of Artifact packages have this retry automatically, but the packages deployed with the M119.0 release do not.
// Once the next release is completed, these retries can be removed.
if (exception is HttpRequestException && exception.InnerException is WebException)
{
return true;
}
while (exception != null)
{
if (exception is TimeoutException)
{
return true;
}
exception = exception.InnerException;
}
return false;
},
cancellationToken: cts,
continueOnCapturedContext: false,
context: context.Id.ToString()));
}
