class ProactiveFloodFlowWriter implements DataTreeChangeListener<StpStatusAwareNodeConnector>,
        OpendaylightInventoryListener {

    public ListenerRegistration<ProactiveFloodFlowWriter> registerAsDataChangeListener() {
        InstanceIdentifier<StpStatusAwareNodeConnector> path = InstanceIdentifier.<Nodes>builder(Nodes.class)
                .<Node>child(Node.class).<NodeConnector>child(NodeConnector.class)
                .<StpStatusAwareNodeConnector>augmentation(StpStatusAwareNodeConnector.class).build();
        return dataBroker.registerDataTreeChangeListener(new DataTreeIdentifier<>(
                LogicalDatastoreType.OPERATIONAL, path), this);
    }

    public  ProactiveFloodFlowWriter(DataBroker dataBroker, SalFlowService salFlowService);

}