import org.opendaylight.controller.sal.topology.IListenTopoUpdates;
import org.opendaylight.controller.sal.topology.IPluginInTopologyService;
import org.opendaylight.controller.sal.topology.IPluginOutTopologyService;
import org.opendaylight.controller.sal.topology.ITopologyService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.opendaylight.controller.sal.topology.IListenTopoUpdates;
import org.opendaylight.controller.sal.topology.IPluginInTopologyService;
import org.opendaylight.controller.sal.topology.IPluginOutTopologyService;
import org.opendaylight.controller.sal.topology.ITopologyService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;