public async Task <IUpdateBlob> TryLockUpdateBlob(string appId)
{
string updateBlobName = GetUpdateBlobName(appId);
ICloudBlob blob = GetBlob(updateBlobName);
await BlobUtils.CreateBlobIfNotExists(blob);
UpdateBlob updateBlob = new UpdateBlob(blob, _blobLeaseFactory);
bool locked = await updateBlob.TryLock();
if (locked == false)
{
throw new UpdateBlobUnavailableException();
}
return(updateBlob);
}
public async Task TestCreateBlobIfNotExists()
{
var container = _blobClient.GetContainerReference("container");
container.CreateIfNotExists();
var blob = container.GetBlockBlobReference("createIfNotExistsTestBlob.txt");
await BlobUtils.CreateBlobIfNotExists(blob);
Assert.True(await blob.ExistsAsync());
string text = "test content";
await blob.UploadTextAsync(text);
await BlobUtils.CreateBlobIfNotExists(blob);
Assert.Equal(text, await blob.DownloadTextAsync());
}