public void PageBlobWriteStreamBasicTestAPM()
{
byte[] buffer = GetRandomBuffer(1024 * 1024);
MD5 hasher = MD5.Create();
CloudBlobClient blobClient = GenerateCloudBlobClient();
blobClient.ParallelOperationThreadCount = 4;
string name = GetRandomContainerName();
CloudBlobContainer container = blobClient.GetContainerReference(name);
try
{
container.Create();
CloudPageBlob blob = container.GetPageBlobReference("blob1");
blob.StreamWriteSizeInBytes = buffer.Length;
using (MemoryStream wholeBlob = new MemoryStream())
{
BlobRequestOptions options = new BlobRequestOptions()
{
StoreBlobContentMD5 = true,
};
using (AutoResetEvent waitHandle = new AutoResetEvent(false))
{
IAsyncResult result = blob.BeginOpenWrite(blobClient.ParallelOperationThreadCount * 2 * buffer.Length, null, options, null,
ar => waitHandle.Set(),
null);
waitHandle.WaitOne();
using (Stream blobStream = blob.EndOpenWrite(result))
{
IAsyncResult[] results = new IAsyncResult[blobClient.ParallelOperationThreadCount * 2];
for (int i = 0; i < results.Length; i++)
{
results[i] = blobStream.BeginWrite(buffer, 0, buffer.Length, null, null);
wholeBlob.Write(buffer, 0, buffer.Length);
Assert.AreEqual(wholeBlob.Position, blobStream.Position);
}
for (int i = 0; i < blobClient.ParallelOperationThreadCount; i++)
{
Assert.IsTrue(results[i].IsCompleted);
}
for (int i = blobClient.ParallelOperationThreadCount; i < results.Length; i++)
{
Assert.IsFalse(results[i].IsCompleted);
}
for (int i = 0; i < results.Length; i++)
{
blobStream.EndWrite(results[i]);
}
}
}
wholeBlob.Seek(0, SeekOrigin.Begin);
string md5 = Convert.ToBase64String(hasher.ComputeHash(wholeBlob));
blob.FetchAttributes();
Assert.AreEqual(md5, blob.Properties.ContentMD5);
using (MemoryStream downloadedBlob = new MemoryStream())
{
blob.DownloadToStream(downloadedBlob);
TestHelper.AssertStreamsAreEqual(wholeBlob, downloadedBlob);
}
}
}
finally
{
container.DeleteIfExists();
}
}