function _handleSuccess(oData) {
			that.iLength = parseInt(oData);
			that.bLengthFinal = true;
			that.bLengthRequested = true;
			that.oCountHandle = null;

			// in the OperationMode.Auto, we check if the count is LE than the given threshold and
			// set the client operation flag accordingly
			if (that.sOperationMode == OperationMode.Auto) {
				if (that.iLength <= that.mParameters.threshold) {
					that.bThresholdRejected = false;
				} else {
					that.bThresholdRejected = true;
				}
				// fire change because of synchronized $count
				that._fireChange({reason: ChangeReason.Change});
			}
		}
Return the length of the list.

@private