renderers/vpp/src/main/java/org/opendaylight/groupbasedpolicy/renderer/vpp/listener/VppNodeListener.java

   1 /*
   2  * Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.groupbasedpolicy.renderer.vpp.listener;
  10
  11 import java.util.Collection;
  12
  13 import javax.annotation.Nonnull;
  14
  15 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  16 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  17 import org.opendaylight.controller.md.sal.binding.api.DataTreeChangeListener;
  18 import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
  19 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  20 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  21 import org.opendaylight.groupbasedpolicy.renderer.vpp.manager.VppNodeManager;
  22 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  23 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  24 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  25 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  26 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 import com.google.common.base.Preconditions;
  31
  32 public class VppNodeListener implements DataTreeChangeListener<Node>, AutoCloseable {
  33
  34     private static final Logger LOG = LoggerFactory.getLogger(VppNodeListener.class);
  35
  36     private final ListenerRegistration<VppNodeListener> listenerRegistration;
  37     private final VppNodeManager nodeManager;
  38
  39     public VppNodeListener(DataBroker dataBroker, VppNodeManager nodeManager) {
  40         this.nodeManager = Preconditions.checkNotNull(nodeManager);
  41         // Register listener
  42         final DataTreeIdentifier<Node> networkTopologyPath = new DataTreeIdentifier<>(LogicalDatastoreType.OPERATIONAL,
  43                 InstanceIdentifier.builder(NetworkTopology.class).child(Topology.class).child(Node.class).build());
  44         listenerRegistration =
  45                 Preconditions.checkNotNull(dataBroker.registerDataTreeChangeListener(networkTopologyPath, this));
  46         LOG.info("Network-Topology VppNodelistener registered");
  47     }
  48
  49     @Override
  50     public void onDataTreeChanged(@Nonnull Collection<DataTreeModification<Node>> changes) {
  51         LOG.debug("Topology Node changed. Changes {}", changes);
  52
  53         for (DataTreeModification<Node> modification : changes) {
  54             DataObjectModification<Node> rootNode = modification.getRootNode();
  55             Node dataAfter = rootNode.getDataAfter();
  56             Node dataBefore = rootNode.getDataBefore();
  57             nodeManager.syncNodes(dataAfter, dataBefore);
  58         }
  59     }
  60
  61     public ListenerRegistration<VppNodeListener> getRegistrationObject() {
  62         return listenerRegistration;
  63     }
  64
  65     @Override
  66     public void close() throws Exception {
  67         listenerRegistration.close();
  68     }
  69 }