public void Download()
{
if (parameters.OverWrite)
{
DeleteTempVhdIfExist(parameters.LocalFilePath);
}
else
{
if (File.Exists(parameters.LocalFilePath))
{
var message = String.Format("File already exists, you can use Overwrite option to delete it:'{0}'", parameters.LocalFilePath);
throw new ArgumentException(message);
}
}
var blobHandle = new BlobHandle(parameters.BlobUri, this.parameters.StorageAccountKey);
if (parameters.ValidateFreeDiskSpace)
{
TryValidateFreeDiskSpace(parameters.LocalFilePath, blobHandle.Length);
}
const int megaByte = 1024 * 1024;
var ranges = blobHandle.GetUploadableRanges();
var bufferManager = BufferManager.CreateBufferManager(Int32.MaxValue, 20 * megaByte);
var downloadStatus = new ProgressStatus(0, ranges.Sum(r => r.Length), new ComputeStats());
Trace.WriteLine(String.Format("Total Data:{0}", ranges.Sum(r => r.Length)));
Program.SyncOutput.WriteVerboseWithTimestamp("Downloading the blob: {0}", parameters.BlobUri.BlobName);
var fileStreamLock = new object();
using (new ServicePointHandler(parameters.BlobUri.Uri, parameters.ConnectionLimit))
{
using (ProgressTracker progressTracker = new ProgressTracker(downloadStatus, parameters.ProgressDownloadStatus, parameters.ProgressDownloadComplete))
{
using (var fileStream = new FileStream(parameters.LocalFilePath, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Write, 8 * megaByte, FileOptions.WriteThrough))
{
fileStream.SetLength(0);
fileStream.SetLength(blobHandle.Length);
Task <LoopResult> task = Task <LoopResult> .Factory.StartNew(() =>
{
return(Threading.Parallel.ForEach <IndexRange, Stream>(ranges,
blobHandle.OpenStream,
(r, b) =>
{
b.Seek(r.StartIndex, SeekOrigin.Begin);
byte[] buffer = this.EnsureReadAsSize(b, (int)r.Length, bufferManager);
lock (fileStreamLock)
{
Trace.WriteLine(String.Format("Range:{0}", r));
fileStream.Seek(r.StartIndex, SeekOrigin.Begin);
fileStream.Write(buffer, 0, (int)r.Length);
fileStream.Flush();
}
downloadStatus.AddToProcessedBytes((int)r.Length);
},
pbwlf =>
{
pbwlf.Dispose();
},
parameters.ConnectionLimit));
});
while (!task.Wait(TimeSpan.FromSeconds(1)))
{
progressTracker.Update();
}
LoopResult lr = task.Result;
if (lr.IsExceptional)
{
throw new AggregateException(lr.Exceptions);
}
}
}
}
Program.SyncOutput.WriteVerboseWithTimestamp("Blob downloaded successfullty: {0}", parameters.BlobUri.BlobName);
}
public void Download()
{
if (parameters.OverWrite)
{
DeleteTempVhdIfExist(parameters.LocalFilePath);
}
else
{
if (File.Exists(parameters.LocalFilePath))
{
var message = String.Format("File already exists, you can use Overwrite option to delete it:'{0}'", parameters.LocalFilePath);
throw new ArgumentException(message);
}
}
var blobHandle = new BlobHandle(parameters.BlobUri, this.parameters.StorageAccountKey);
if (parameters.ValidateFreeDiskSpace)
{
TryValidateFreeDiskSpace(parameters.LocalFilePath, blobHandle.Length);
}
const int megaByte = 1024 * 1024;
var ranges = blobHandle.GetUploadableRanges();
var bufferManager = BufferManager.CreateBufferManager(Int32.MaxValue, 20 * megaByte);
var downloadStatus = new ProgressStatus(0, ranges.Sum(r => r.Length), new ComputeStats());
Trace.WriteLine(String.Format("Total Data:{0}", ranges.Sum(r => r.Length)));
Program.SyncOutput.WriteVerboseWithTimestamp("Downloading the blob: {0}", parameters.BlobUri.BlobName);
var fileStreamLock = new object();
using (new ServicePointHandler(parameters.BlobUri.Uri, parameters.ConnectionLimit))
{
using (new ProgressTracker(downloadStatus, parameters.ProgressDownloadStatus, parameters.ProgressDownloadComplete, TimeSpan.FromSeconds(1)))
{
using (var fileStream = new FileStream(parameters.LocalFilePath, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Write, 8 * megaByte, FileOptions.WriteThrough))
{
fileStream.SetLength(0);
fileStream.SetLength(blobHandle.Length);
LoopResult lr = Parallel.ForEach<IndexRange, Stream>(ranges,
blobHandle.OpenStream,
(r, b) =>
{
b.Seek(r.StartIndex, SeekOrigin.Begin);
byte[] buffer = this.EnsureReadAsSize(b, (int)r.Length, bufferManager);
lock (fileStreamLock)
{
Trace.WriteLine(String.Format("Range:{0}", r));
fileStream.Seek(r.StartIndex, SeekOrigin.Begin);
fileStream.Write(buffer, 0, (int)r.Length);
fileStream.Flush();
}
downloadStatus.AddToProcessedBytes((int)r.Length);
},
pbwlf =>
{
pbwlf.Dispose();
},
parameters.ConnectionLimit);
if (lr.IsExceptional)
{
throw new AggregateException(lr.Exceptions);
}
}
}
}
Program.SyncOutput.WriteVerboseWithTimestamp("Blob downloaded successfullty: {0}", parameters.BlobUri.BlobName);
}
