private void MaybeGroomPocketed(CancellationToken ct)
{
if (DateTime.UtcNow > _groomSchedule)
{
AzureStorageAssistant.GroomOldBlobsFrom(_containerName, oldMessage, ct);
_groomSchedule = DateTime.UtcNow + TimeSpan.FromHours(1.0);
}
}
public AzureEnvironmentDistributedMutex()
{
_log = ClassLogger.Create(GetType());
_dblog = DebugOnlyLogger.Create(_log);
var config = Catalog.Factory.Resolve <IConfig>(SpecialFactoryContexts.Routed);
_name = config[DistributedMutexLocalConfig.Name].ToLowerInvariant();
_expireUnused = TimeSpan.FromSeconds(config.Get <int>(DistributedMutexLocalConfig.UnusedExpirationSeconds));
var account = Client.FromConfig().ForBlobs();
_container = account.GetContainerReference(AzureConstants.LeaseContainer);
_container.CreateIfNotExist();
_leaseBlob = _container.GetBlobReference(_name);
_cts = new CancellationTokenSource();
_cancelGrooming = new CancellationTokenSource();
try
{
if (!_leaseBlob.Exists())
{
_leaseBlob.UploadText("1");
_leaseBlob.SetExpiration(_expireUnused);
_log.InfoFormat("Creating distributed mutex for {0}, auto expires in {1}", _name, _expireUnused);
}
}
catch (StorageClientException storageClientException1)
{
StorageClientException storageClientException = storageClientException1;
if (storageClientException.ErrorCode == StorageErrorCode.BlobAlreadyExists ||
storageClientException.StatusCode == HttpStatusCode.PreconditionFailed)
{
}
else
{
throw;
}
}
_groomingTask =
Task.Factory.StartNew(
() =>
AzureStorageAssistant.CleanExpiredBlobsFrom(AzureConstants.LeaseContainer, _cancelGrooming.Token,
false));
}
/// <summary>
/// searches for and deletes all blobs marked as expired
/// </summary>
/// <param name="ct"> </param>
private static void CleanExpiredBlobs(CancellationToken ct)
{
try
{
var account =
CloudStorageAccount.FromConfigurationSetting(CommonConfiguration.DefaultStorageConnection.ToString());
var bc = account.CreateCloudBlobClient();
ct.ThrowIfCancellationRequested();
var containers = bc.ListContainers();
foreach (var c in containers)
{
ct.ThrowIfCancellationRequested();
AzureStorageAssistant.CleanExpiredBlobsFrom(c.Name, ct);
}
}
catch
{
}
}
/// <summary>
/// Deletes any blob containers marked as expired
/// </summary>
/// <param name="ct"> </param>
private static void CleanExpiredContainers(CancellationToken ct)
{
AzureStorageAssistant.GroomExpiredContainers();
}
/// <summary>
/// Searches the blob upload folder for uploads that are too old to complete, and deletes them.
/// </summary>
/// <param name="ct"> </param>
private static void CleanUploads(CancellationToken ct)
{
AzureStorageAssistant.GroomOldBlobsFrom(BlobBufferedFileUpload.UploadBufferContainer,
TimeSpan.FromDays(30.0), ct);
}