/// <summary>
/// Uploads the file using the given metadata.
///
/// </summary>
/// <param name="metadata"></param>
private void UploadFile(UploadMetadata metadata)
{
try
{
//we need to override the default .NET value for max connections to a host to our number of threads, if necessary (otherwise we won't achieve the parallelism we want)
_previousDefaultConnectionLimit = ServicePointManager.DefaultConnectionLimit;
ServicePointManager.DefaultConnectionLimit = Math.Max(this.Parameters.ThreadCount,
ServicePointManager.DefaultConnectionLimit);
//match up the metadata with the information on the server
if (this.Parameters.IsResume)
{
ValidateMetadataForResume(metadata);
}
else
{
ValidateMetadataForFreshUpload(metadata);
}
var segmentProgressTracker = CreateSegmentProgressTracker(metadata);
if (metadata.SegmentCount == 0)
{
// simply create the target stream, overwriting existing streams if they exist
_frontEnd.CreateStream(metadata.TargetStreamPath, true, null, 0);
}
else if (metadata.SegmentCount > 1)
{
//perform the multi-segment upload
var msu = new MultipleSegmentUploader(metadata, this.Parameters.ThreadCount, _frontEnd, _token,
segmentProgressTracker);
msu.UseSegmentBlockBackOffRetryStrategy = this.Parameters.UseSegmentBlockBackOffRetryStrategy;
msu.Upload();
//concatenate the files at the end
ConcatenateSegments(metadata);
}
else
{
//optimization if we only have one segment: upload it directly to the target stream
metadata.Segments[0].Path = metadata.TargetStreamPath;
var ssu = new SingleSegmentUploader(0, metadata, _frontEnd, _token, segmentProgressTracker);
ssu.UseBackOffRetryStrategy = this.Parameters.UseSegmentBlockBackOffRetryStrategy;
ssu.Upload();
}
}
catch (OperationCanceledException)
{
// do nothing since we have already marked everything as failed
}
finally
{
//revert back the default .NET value for max connections to a host to whatever it was before
ServicePointManager.DefaultConnectionLimit = _previousDefaultConnectionLimit;
}
}
/// <summary>
/// Uploads the buffer.
/// </summary>
/// <param name="buffer">The buffer.</param>
/// <param name="bytesToCopy">The bytes to copy.</param>
/// <param name="targetStreamOffset">The target stream offset.</param>
/// <returns></returns>
private long UploadBuffer(byte[] buffer, int bytesToCopy, long targetStreamOffset)
{
//append it to the remote stream
int attemptCount = 0;
bool uploadCompleted = false;
while (!uploadCompleted && attemptCount < MaxBufferUploadAttemptCount)
{
_token.ThrowIfCancellationRequested();
attemptCount++;
try
{
if (targetStreamOffset == 0)
{
_frontEnd.CreateStream(_segmentMetadata.Path, true, buffer, bytesToCopy);
}
else
{
_frontEnd.AppendToStream(_segmentMetadata.Path, buffer, targetStreamOffset, bytesToCopy);
}
uploadCompleted = true;
targetStreamOffset += bytesToCopy;
ReportProgress(targetStreamOffset, false);
}
catch
{
//if we tried more than the number of times we were allowed to, give up and throw the exception
if (attemptCount >= MaxBufferUploadAttemptCount)
{
ReportProgress(targetStreamOffset, true);
throw;
}
else
{
WaitForRetry(attemptCount, this.UseBackOffRetryStrategy, _token);
}
}
}
return(targetStreamOffset);
}
/// <summary>
/// Uploads the buffer.
/// </summary>
/// <param name="buffer">The buffer.</param>
/// <param name="bytesToCopy">The bytes to copy.</param>
/// <param name="targetStreamOffset">The target stream offset.</param>
/// <returns></returns>
private long UploadBuffer(byte[] buffer, int bytesToCopy, long targetStreamOffset)
{
//append it to the remote stream
int attemptCount = 0;
bool uploadCompleted = false;
while (!uploadCompleted && attemptCount < MaxBufferUploadAttemptCount)
{
_token.ThrowIfCancellationRequested();
attemptCount++;
try
{
if (targetStreamOffset == 0)
{
_frontEnd.CreateStream(_segmentMetadata.Path, true, buffer, bytesToCopy);
}
else
{
_frontEnd.AppendToStream(_segmentMetadata.Path, buffer, targetStreamOffset, bytesToCopy);
}
uploadCompleted = true;
targetStreamOffset += bytesToCopy;
ReportProgress(targetStreamOffset, false);
}
catch (AggregateException e)
{
if (e.InnerExceptions.Count == 1 && e.InnerException is AdlsErrorException)
{
if (((AdlsErrorException)e.InnerException).Body.RemoteException is AdlsBadOffsetException)
{
// this means we tried to re-upload at the same location and the upload actually succeeded, which means we should move on.
uploadCompleted = true;
targetStreamOffset += bytesToCopy;
ReportProgress(targetStreamOffset, false);
}
else
{
//if we tried more than the number of times we were allowed to, give up and throw the exception
if (attemptCount >= MaxBufferUploadAttemptCount)
{
ReportProgress(targetStreamOffset, true);
throw e;
}
else
{
WaitForRetry(attemptCount, this.UseBackOffRetryStrategy, _token);
}
}
}
else
{
//if we tried more than the number of times we were allowed to, give up and throw the exception
if (attemptCount >= MaxBufferUploadAttemptCount)
{
ReportProgress(targetStreamOffset, true);
throw e;
}
else
{
WaitForRetry(attemptCount, this.UseBackOffRetryStrategy, _token);
}
}
}
catch (AdlsErrorException e)
{
if (e.Body.RemoteException is AdlsBadOffsetException)
{
// this means we tried to re-upload at the same location and the upload actually succeeded, which means we should move on.
uploadCompleted = true;
targetStreamOffset += bytesToCopy;
ReportProgress(targetStreamOffset, false);
}
else
{
//if we tried more than the number of times we were allowed to, give up and throw the exception
if (attemptCount >= MaxBufferUploadAttemptCount)
{
ReportProgress(targetStreamOffset, true);
throw e;
}
else
{
WaitForRetry(attemptCount, this.UseBackOffRetryStrategy, _token);
}
}
}
catch (Exception ex)
{
//if we tried more than the number of times we were allowed to, give up and throw the exception
if (attemptCount >= MaxBufferUploadAttemptCount)
{
ReportProgress(targetStreamOffset, true);
throw ex;
}
else
{
WaitForRetry(attemptCount, this.UseBackOffRetryStrategy, _token);
}
}
}
return(targetStreamOffset);
}
