static void Main(string[] args)
{
EnableQuickEditMode();
// Header.
Console.WriteLine("");
Console.WriteLine(" Windows Azure Page Blob Breaklease Tool Ver 1.0 - George He");
Console.WriteLine(" Usage: breaklease <accountName> <accountKey> <page blob url>");
Begin:
ConsoleColor colorFore = Console.ForegroundColor;
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("Input your script, press enter to run：");
Console.ForegroundColor = colorFore;
try
{
args = Console.ReadLine().Replace("breaklease ", "").Split(new char[] { ' ' });
// Validate args.
if (args.Length != 3)
{
Console.WriteLine(" Invalid number of arguments.");
Console.WriteLine("");
goto Begin;
}
var uri = args[2];
Console.WriteLine("Breaklease Processing: {0}", uri);
Console.WriteLine("");
if (credentials == null || args[0] != initAccount)
{
initAccount = args[0];
credentials = new StorageCredentials(args[0], args[1]);
storageAccount = new CloudStorageAccount(credentials, new Uri(string.Format("http://{0}.blob.core.chinacloudapi.cn/", args[0])), null, null, null);
}
var arrs = args[2].Split(new char[] { '/' });
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
CloudBlobContainer container = blobClient.GetContainerReference(arrs[3]);
CloudBlockBlob blob = container.GetBlockBlobReference(arrs[4]);
//Timespan is a period of time in seconds, here means 1 sec later break the lease after command execution.
TimeSpan breakTime = new TimeSpan(0, 0, 1);
blob.BreakLease(breakTime);
Console.WriteLine("Breaklease successful, you can try to delete the file again!");
}
catch (Exception ex)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Error: {0}", ex);
Console.ForegroundColor = colorFore;
}
goto Begin;
Console.ReadLine();
}
static void AcquireLeaseSample(string connectionString)
{
const string blobName = "rating.txt";
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(connectionString);
CloudBlobClient client = storageAccount.CreateCloudBlobClient();
CloudBlobContainer container = client.GetContainerReference("myfiles");
CloudBlockBlob blob = container.GetBlockBlobReference(blobName);
blob.UploadText("0", Encoding.UTF8);
Parallel.For(0, 20, new ParallelOptions {
MaxDegreeOfParallelism = Environment.ProcessorCount * 2
}, i =>
{
CloudStorageAccount sAccount = CloudStorageAccount.Parse(connectionString);
CloudBlobClient bClient = storageAccount.CreateCloudBlobClient();
CloudBlobContainer bContainer = client.GetContainerReference("myfiles");
CloudBlockBlob blobRef = container.GetBlockBlobReference(blobName);
bool isOk = false;
while (isOk == false)
{
try
{
// The Lease Blob operation establishes and manages a lock on a blob for write and delete operations.
// The lock duration can be 15 to 60 seconds, or can be infinite.
string leaseId = blobRef.AcquireLease(TimeSpan.FromSeconds(15), Guid.NewGuid().ToString());
using (Stream stream = blobRef.OpenRead())
using (StreamReader reader = new StreamReader(stream))
{
int raitingCount = int.Parse(reader.ReadToEnd());
byte[] bytesToUpload = Encoding.UTF8.GetBytes((raitingCount + 1).ToString(CultureInfo.InvariantCulture));
blobRef.UploadFromByteArray(bytesToUpload, 0, bytesToUpload.Length, AccessCondition.GenerateLeaseCondition(leaseId));
}
blobRef.BreakLease(breakPeriod: TimeSpan.Zero, accessCondition: AccessCondition.GenerateLeaseCondition(leaseId));
isOk = true;
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
});
}
public static void ForceUnlockAzureDirectory(CloudStorageAccount cloudStorageAccount, string container, TextWriter log = null)
{
log = log ?? DefaultTraceWriter;
// unlocks the write.lock object - this should only be used after a system crash and only form a singleton
CloudBlobClient cloudBlobClient = cloudStorageAccount.CreateCloudBlobClient();
CloudBlobContainer cloudBlobContainer = cloudBlobClient.GetContainerReference(container);
CloudBlockBlob cloudBlockBlob = cloudBlobContainer.GetBlockBlobReference("write.lock");
try
{
log.WriteLine("About to attempt to BreakLease");
cloudBlockBlob.BreakLease(TimeSpan.FromMilliseconds(1));
log.WriteLine("BreakLease Success");
}
catch (StorageException e)
{
log.WriteLine("BreakLease Exception");
// we will get a 409 "Conflict" if the lease is not there - ignore that case as all we were trying to do was drop the lease anyhow
if (e.InnerException is WebException)
{
HttpWebResponse response = (HttpWebResponse)((WebException)e.InnerException).Response;
if (response.StatusCode != HttpStatusCode.Conflict)
{
throw;
}
log.WriteLine("BreakLease Exception is harmless");
}
else
{
throw;
}
}
Thread.Sleep(3000);
}
