public override void RemoveItem(HttpContext context, string id, object lockId, SessionStateStoreData item)
{
Debug.Assert(context != null);
Debug.Assert(lockId != null);
Debug.Assert(_blobProvider != null);
SecUtility.CheckParameter(ref id, true, true, false, Configuration.MaxStringPropertySizeInChars, "id");
try
{
sqlTableServiceContext svc = CreateDataServiceContext();
SessionRow session = GetSession(id, svc);
if (session == null)
{
Debug.Assert(false);
return;
}
if (session.Lock != (int)lockId)
{
Debug.Assert(false);
return;
}
svc.DeleteObject(session);
svc.SaveChangesWithRetries();
}
catch (InvalidOperationException e)
{
throw new ProviderException("Error accessing the data store!", e);
}
// delete associated blobs
try
{
IEnumerable <sqlListBlobItem> e = _blobProvider.ListBlobs(GetBlobNamePrefix(id));
if (e == null)
{
return;
}
IEnumerator <sqlListBlobItem> props = e.GetEnumerator();
if (props == null)
{
return;
}
while (props.MoveNext())
{
if (props.Current != null)
{
if (!_blobProvider.DeleteBlob(props.Current.Uri.ToString()))
{
// ignore this; it is possible that another thread could try to delete the blob
// at the same time
}
}
}
}
catch (Exception e)
{
throw new ProviderException("Error accessing blob storage.", e);
}
}