private Task StartWriteToAzure(CloudAppendBlob file, string chunkFilePath, CancellationToken token)
{
return(Task.Run(
async() =>
{
var context = new OperationContext();
var options =
new BlobRequestOptions
{
RetryPolicy = new LinearRetry(TimeSpan.FromSeconds(5), 10),
SingleBlobUploadThresholdInBytes = AppendBlobBlockSize,
UseTransactionalMD5 = false,
};
var condition = AccessCondition.GenerateEmptyCondition();
var prevChunk = 0;
while (true)
{
if (_chunkFilesCompleted == 0)
{
await Task.Delay(100);
continue;
}
await WriteCompletedFiles();
if (token.IsCancellationRequested)
{
await WriteCompletedFiles();
break;
}
await Task.Delay(100, token);
}
async Task WriteCompletedFiles()
{
while (prevChunk < _chunkFilesCompleted)
{
var chunkPath = Path.Combine(chunkFilePath, (prevChunk + 1).ToString());
await file.AppendFromFileAsync(chunkPath, condition, options, context);
File.Delete(chunkPath);
prevChunk++;
}
}
}, token));
}
public static void AppendFromFile(this CloudAppendBlob blob, string path)
{
blob.AppendFromFileAsync(path).Wait();
}
