private static void DoLeaseOperation(CloudBlob blob, string leaseId, LeaseAction action)
{
switch (action)
{
case LeaseAction.Acquire:
blob.AcquireLeaseAsync(TimeSpan.FromSeconds(90), leaseId).Wait();
break;
case LeaseAction.Renew:
blob.RenewLeaseAsync(AccessCondition.GenerateLeaseCondition(leaseId)).Wait();
break;
case LeaseAction.Release:
blob.ReleaseLeaseAsync(AccessCondition.GenerateLeaseCondition(leaseId)).Wait();
break;
case LeaseAction.Break:
blob.BreakLeaseAsync(TimeSpan.FromSeconds(90)).Wait();
break;
case LeaseAction.Change:
blob.ChangeLeaseAsync(leaseId, AccessCondition.GenerateLeaseCondition(leaseId)).Wait();
break;
default:
throw new ArgumentOutOfRangeException(nameof(action), action, null);
}
}
/// <summary>
/// Forcefully deletes a blob.
/// </summary>
/// <param name="blob">The CloudBlob to delete.</param>
/// <returns>A task that completes when the operation is finished.</returns>
public static async Task <bool> ForceDeleteAsync(CloudBlob blob)
{
try
{
await blob.DeleteAsync();
return(true);
}
catch (StorageException e) when(BlobDoesNotExist(e))
{
return(false);
}
catch (StorageException e) when(CannotDeleteBlobWithLease(e))
{
try
{
await blob.BreakLeaseAsync(TimeSpan.Zero).ConfigureAwait(false);
}
catch
{
// we ignore exceptions in the lease breaking since there could be races
}
// retry the delete
try
{
await blob.DeleteAsync().ConfigureAwait(false);
return(true);
}
catch (StorageException ex) when(BlobDoesNotExist(ex))
{
return(false);
}
}
}