pcep/tunnel-provider/src/main/java/org/opendaylight/bgpcep/pcep/tunnel/provider/NodeChangedListener.java

   1 /*
   2  * Copyright (c) 2013 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 package org.opendaylight.bgpcep.pcep.tunnel.provider;
   9
  10 import com.google.common.base.Optional;
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.collect.Lists;
  13 import com.google.common.util.concurrent.FutureCallback;
  14 import com.google.common.util.concurrent.Futures;
  15 import com.google.common.util.concurrent.JdkFutureAdapters;
  16 import java.util.HashSet;
  17 import java.util.Map;
  18 import java.util.Set;
  19 import java.util.concurrent.ExecutionException;
  20 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  21 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
  22 import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
  23 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
  24 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  25 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpAddress;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.AdministrativeStatus;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.Path1;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.lsp.identifiers.tlv.lsp.identifiers.AddressFamily;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.endpoints.address.family.Ipv4Case;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.endpoints.address.family.Ipv6Case;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.endpoints.address.family.ipv4._case.Ipv4;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.endpoints.address.family.ipv6._case.Ipv6;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.Node1;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.pcep.client.attributes.PathComputationClient;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.pcep.client.attributes.path.computation.client.ReportedLsp;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.Link1;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.Link1Builder;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.SupportingNode1;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.SupportingNode1Builder;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.tunnel.pcep.supporting.node.attributes.PathComputationClientBuilder;
  41 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.LinkId;
  42 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
  43 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TpId;
  44 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.link.attributes.DestinationBuilder;
  45 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.link.attributes.SourceBuilder;
  46 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  47 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Link;
  48 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.LinkBuilder;
  49 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.LinkKey;
  50 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  51 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeBuilder;
  52 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
  53 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.node.TerminationPoint;
  54 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.node.TerminationPointBuilder;
  55 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.node.TerminationPointKey;
  56 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.node.attributes.SupportingNode;
  57 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.node.attributes.SupportingNodeBuilder;
  58 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.node.attributes.SupportingNodeKey;
  59 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.TerminationPoint1;
  60 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.TerminationPoint1Builder;
  61 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.termination.point.attributes.IgpTerminationPointAttributesBuilder;
  62 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.termination.point.attributes.igp.termination.point.attributes.TerminationPointType;
  63 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.termination.point.attributes.igp.termination.point.attributes.termination.point.type.Ip;
  64 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.termination.point.attributes.igp.termination.point.attributes.termination.point.type.IpBuilder;
  65 import org.opendaylight.yangtools.yang.binding.DataObject;
  66 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  67 import org.slf4j.Logger;
  68 import org.slf4j.LoggerFactory;
  69
  70 public final class NodeChangedListener implements DataChangeListener {
  71     private static final Logger LOG = LoggerFactory.getLogger(NodeChangedListener.class);
  72     private final InstanceIdentifier<Topology> target;
  73     private final DataBroker dataProvider;
  74
  75     NodeChangedListener(final DataBroker dataProvider, final InstanceIdentifier<Topology> target) {
  76         this.dataProvider = Preconditions.checkNotNull(dataProvider);
  77         this.target = Preconditions.checkNotNull(target);
  78     }
  79
  80     private static void categorizeIdentifier(final InstanceIdentifier<?> i, final Set<InstanceIdentifier<ReportedLsp>> changedLsps,
  81             final Set<InstanceIdentifier<Node>> changedNodes) {
  82         final InstanceIdentifier<ReportedLsp> li = i.firstIdentifierOf(ReportedLsp.class);
  83         if (li == null) {
  84             final InstanceIdentifier<Node> ni = i.firstIdentifierOf(Node.class);
  85             if (ni == null) {
  86                 LOG.warn("Ignoring uncategorized identifier {}", i);
  87             } else {
  88                 changedNodes.add(ni);
  89             }
  90         } else {
  91             changedLsps.add(li);
  92         }
  93     }
  94
  95     private static void enumerateLsps(final InstanceIdentifier<Node> id, final Node node, final Set<InstanceIdentifier<ReportedLsp>> lsps) {
  96         if (node == null) {
  97             LOG.trace("Skipping null node", id);
  98             return;
  99         }
 100         final Node1 pccnode = node.getAugmentation(Node1.class);
 101         if (pccnode == null) {
 102             LOG.trace("Skipping non-PCEP-enabled node {}", id);
 103             return;
 104         }
 105
 106         for (final ReportedLsp l : pccnode.getPathComputationClient().getReportedLsp()) {
 107             lsps.add(id.builder().augmentation(Node1.class).child(PathComputationClient.class).child(ReportedLsp.class, l.getKey()).toInstance());
 108         }
 109     }
 110
 111     private static LinkId linkIdForLsp(final InstanceIdentifier<ReportedLsp> i, final ReportedLsp lsp) {
 112         return new LinkId(i.firstKeyOf(Node.class, NodeKey.class).getNodeId().getValue() + "/lsps/" + lsp.getName());
 113     }
 114
 115     private InstanceIdentifier<Link> linkForLsp(final LinkId linkId) {
 116         return this.target.child(Link.class, new LinkKey(linkId));
 117     }
 118
 119     private SupportingNode createSupportingNode(final NodeId sni, final Boolean inControl) {
 120         final SupportingNodeKey sk = new SupportingNodeKey(sni);
 121         final SupportingNodeBuilder snb = new SupportingNodeBuilder();
 122         snb.setNodeRef(sni);
 123         snb.setKey(sk);
 124         snb.addAugmentation(SupportingNode1.class, new SupportingNode1Builder().setPathComputationClient(
 125                 new PathComputationClientBuilder().setControlling(inControl).build()).build());
 126
 127         return snb.build();
 128     }
 129
 130     private InstanceIdentifier<TerminationPoint> getIpTerminationPoint(final ReadWriteTransaction trans, final IpAddress addr,
 131             final InstanceIdentifier<Node> sni, final Boolean inControl) throws InterruptedException, ExecutionException {
 132         for (final Node n : ((Topology) trans.read(LogicalDatastoreType.OPERATIONAL, this.target).get().get()).getNode()) {
 133             for (final TerminationPoint tp : n.getTerminationPoint()) {
 134                 final TerminationPoint1 tpa = tp.getAugmentation(TerminationPoint1.class);
 135
 136                 if (tpa != null) {
 137                     final TerminationPointType tpt = tpa.getIgpTerminationPointAttributes().getTerminationPointType();
 138
 139                     if (tpt instanceof Ip) {
 140                         for (final IpAddress a : ((Ip) tpt).getIpAddress()) {
 141                             if (addr.equals(a.getIpv6Address())) {
 142                                 if (sni != null) {
 143                                     final NodeKey k = InstanceIdentifier.keyOf(sni);
 144                                     boolean have = false;
 145
 146                                     /*
 147                                      * We may have found a termination point which has been created as a destination,
 148                                      * so it does not have a supporting node pointer. Since we now know what it is,
 149                                      * fill it in.
 150                                      */
 151                                     for (final SupportingNode sn : n.getSupportingNode()) {
 152                                         if (sn.getNodeRef().equals(k.getNodeId())) {
 153                                             have = true;
 154                                             break;
 155                                         }
 156                                     }
 157
 158                                     if (!have) {
 159                                         final SupportingNode sn = createSupportingNode(k.getNodeId(), inControl);
 160
 161                                         trans.put(LogicalDatastoreType.OPERATIONAL, this.target.child(Node.class, n.getKey()).child(
 162                                                 SupportingNode.class, sn.getKey()), sn);
 163                                     }
 164                                 }
 165                                 return this.target.builder().child(Node.class, n.getKey()).child(TerminationPoint.class, tp.getKey()).toInstance();
 166                             }
 167                         }
 168                     } else {
 169                         LOG.debug("Ignoring termination point type {}", tpt);
 170                     }
 171                 }
 172             }
 173         }
 174
 175         LOG.debug("Termination point for {} not found, creating a new one", addr);
 176
 177         final String url = "ip://" + addr.toString();
 178         final TerminationPointKey tpk = new TerminationPointKey(new TpId(url));
 179         final TerminationPointBuilder tpb = new TerminationPointBuilder();
 180         tpb.setKey(tpk).setTpId(tpk.getTpId());
 181         tpb.addAugmentation(TerminationPoint1.class, new TerminationPoint1Builder().setIgpTerminationPointAttributes(
 182                 new IgpTerminationPointAttributesBuilder().setTerminationPointType(
 183                         new IpBuilder().setIpAddress(Lists.newArrayList(addr)).build()).build()).build());
 184
 185         final NodeKey nk = new NodeKey(new NodeId(url));
 186         final NodeBuilder nb = new NodeBuilder();
 187         nb.setKey(nk).setNodeId(nk.getNodeId());
 188         nb.setTerminationPoint(Lists.newArrayList(tpb.build()));
 189         if (sni != null) {
 190             nb.setSupportingNode(Lists.newArrayList(createSupportingNode(InstanceIdentifier.keyOf(sni).getNodeId(), inControl)));
 191         }
 192
 193         final InstanceIdentifier<Node> nid = this.target.child(Node.class, nb.getKey());
 194         trans.put(LogicalDatastoreType.OPERATIONAL, nid, nb.build());
 195         return nid.child(TerminationPoint.class, tpb.getKey());
 196     }
 197
 198     private void create(final ReadWriteTransaction trans, final InstanceIdentifier<ReportedLsp> i, final ReportedLsp value) throws InterruptedException, ExecutionException {
 199         final InstanceIdentifier<Node> ni = i.firstIdentifierOf(Node.class);
 200
 201         final Path1 rl = value.getPath().get(0).getAugmentation(Path1.class);
 202
 203         final AddressFamily af = rl.getLsp().getTlvs().getLspIdentifiers().getAddressFamily();
 204
 205         /*
 206          * We are trying to ensure we have source and destination nodes.
 207          */
 208         final IpAddress srcIp, dstIp;
 209         if (af instanceof Ipv4Case) {
 210             final Ipv4 ipv4 = ((Ipv4Case) af).getIpv4();
 211             srcIp = new IpAddress(ipv4.getSourceIpv4Address());
 212             dstIp = new IpAddress(ipv4.getDestinationIpv4Address());
 213         } else if (af instanceof Ipv6Case) {
 214             final Ipv6 ipv6 = ((Ipv6Case) af).getIpv6();
 215             srcIp = new IpAddress(ipv6.getSourceIpv6Address());
 216             dstIp = new IpAddress(ipv6.getDestinationIpv6Address());
 217         } else {
 218             throw new IllegalArgumentException("Unsupported address family: " + af.getImplementedInterface());
 219         }
 220
 221         final Link1Builder lab = new Link1Builder(value.getPath().get(0).getLspa());
 222         lab.setBandwidth(value.getPath().get(0).getBandwidth().getBandwidth());
 223         lab.setClassType(value.getPath().get(0).getClassType().getClassType());
 224         lab.setSymbolicPathName(value.getName());
 225
 226         final InstanceIdentifier<TerminationPoint> dst = getIpTerminationPoint(trans, dstIp, null, Boolean.FALSE);
 227         final InstanceIdentifier<TerminationPoint> src = getIpTerminationPoint(trans, srcIp, ni, rl.getLsp().isDelegate());
 228
 229         final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.Link1Builder slab = new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.Link1Builder();
 230         slab.setOperationalStatus(rl.getLsp().getOperational());
 231         slab.setAdministrativeStatus(rl.getLsp().isAdministrative() ? AdministrativeStatus.Active : AdministrativeStatus.Inactive);
 232
 233         final LinkId id = linkIdForLsp(i, value);
 234         final LinkBuilder lb = new LinkBuilder();
 235         lb.setLinkId(id);
 236
 237         lb.setSource(new SourceBuilder().setSourceNode(src.firstKeyOf(Node.class, NodeKey.class).getNodeId()).setSourceTp(
 238                 src.firstKeyOf(TerminationPoint.class, TerminationPointKey.class).getTpId()).build());
 239         lb.setDestination(new DestinationBuilder().setDestNode(dst.firstKeyOf(Node.class, NodeKey.class).getNodeId()).setDestTp(
 240                 dst.firstKeyOf(TerminationPoint.class, TerminationPointKey.class).getTpId()).build());
 241         lb.addAugmentation(Link1.class, lab.build());
 242         lb.addAugmentation(org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.Link1.class,
 243                 slab.build());
 244
 245         trans.put(LogicalDatastoreType.OPERATIONAL, linkForLsp(id), lb.build());
 246     }
 247
 248     private InstanceIdentifier<TerminationPoint> tpIdentifier(final NodeId node, final TpId tp) {
 249         return this.target.builder().child(Node.class, new NodeKey(node)).child(TerminationPoint.class, new TerminationPointKey(tp)).toInstance();
 250     }
 251
 252     private InstanceIdentifier<Node> nodeIdentifier(final NodeId node) {
 253         return this.target.child(Node.class, new NodeKey(node));
 254     }
 255
 256     private void remove(final ReadWriteTransaction trans, final InstanceIdentifier<ReportedLsp> i, final ReportedLsp value) throws InterruptedException, ExecutionException {
 257         final InstanceIdentifier<Link> li = linkForLsp(linkIdForLsp(i, value));
 258
 259         final Optional<Link> ol = trans.read(LogicalDatastoreType.OPERATIONAL, li).get();
 260         if (!ol.isPresent()) {
 261             return;
 262         }
 263
 264         final Link l = (Link) ol.get();
 265         LOG.debug("Removing link {} (was {})", li, l);
 266         trans.delete(LogicalDatastoreType.OPERATIONAL, li);
 267
 268         LOG.debug("Searching for orphan links/nodes");
 269         final Optional<Topology> ot = trans.read(LogicalDatastoreType.OPERATIONAL, this.target).get();
 270         Preconditions.checkState(ot.isPresent());
 271
 272         final Topology t = (Topology) ot.get();
 273         NodeId srcNode = l.getSource().getSourceNode();
 274         NodeId dstNode = l.getDestination().getDestNode();
 275         TpId srcTp = l.getSource().getSourceTp();
 276         TpId dstTp = l.getDestination().getDestTp();
 277
 278         boolean orphSrcNode = true, orphDstNode = true, orphDstTp = true, orphSrcTp = true;
 279         for (final Link lw : t.getLink()) {
 280             LOG.trace("Checking link {}", lw);
 281
 282             final NodeId sn = lw.getSource().getSourceNode();
 283             final NodeId dn = lw.getDestination().getDestNode();
 284             final TpId st = lw.getSource().getSourceTp();
 285             final TpId dt = lw.getDestination().getDestTp();
 286
 287             // Source node checks
 288             if (srcNode.equals(sn)) {
 289                 if (orphSrcNode) {
 290                     LOG.debug("Node {} held by source of link {}", srcNode, lw);
 291                     orphSrcNode = false;
 292                 }
 293                 if (orphSrcTp && srcTp.equals(st)) {
 294                     LOG.debug("TP {} held by source of link {}", srcTp, lw);
 295                     orphSrcTp = false;
 296                 }
 297             }
 298             if (srcNode.equals(dn)) {
 299                 if (orphSrcNode) {
 300                     LOG.debug("Node {} held by destination of link {}", srcNode, lw);
 301                     orphSrcNode = false;
 302                 }
 303                 if (orphSrcTp && srcTp.equals(dt)) {
 304                     LOG.debug("TP {} held by destination of link {}", srcTp, lw);
 305                     orphSrcTp = false;
 306                 }
 307             }
 308
 309             // Destination node checks
 310             if (dstNode.equals(sn)) {
 311                 if (orphDstNode) {
 312                     LOG.debug("Node {} held by source of link {}", dstNode, lw);
 313                     orphDstNode = false;
 314                 }
 315                 if (orphDstTp && dstTp.equals(st)) {
 316                     LOG.debug("TP {} held by source of link {}", dstTp, lw);
 317                     orphDstTp = false;
 318                 }
 319             }
 320             if (dstNode.equals(dn)) {
 321                 if (orphDstNode) {
 322                     LOG.debug("Node {} held by destination of link {}", dstNode, lw);
 323                     orphDstNode = false;
 324                 }
 325                 if (orphDstTp && dstTp.equals(dt)) {
 326                     LOG.debug("TP {} held by destination of link {}", dstTp, lw);
 327                     orphDstTp = false;
 328                 }
 329             }
 330         }
 331
 332         if (orphSrcNode && !orphSrcTp) {
 333             LOG.warn("Orphan source node {} but not TP {}, retaining the node", srcNode, srcTp);
 334             orphSrcNode = false;
 335         }
 336         if (orphDstNode && !orphDstTp) {
 337             LOG.warn("Orphan destination node {} but not TP {}, retaining the node", dstNode, dstTp);
 338             orphDstNode = false;
 339         }
 340
 341         if (orphSrcNode) {
 342             LOG.debug("Removing orphan node {}", srcNode);
 343             trans.delete(LogicalDatastoreType.OPERATIONAL, nodeIdentifier(srcNode));
 344         } else if (orphSrcTp) {
 345             LOG.debug("Removing orphan TP {} on node {}", srcTp, srcNode);
 346             trans.delete(LogicalDatastoreType.OPERATIONAL, tpIdentifier(srcNode, srcTp));
 347         }
 348         if (orphDstNode) {
 349             LOG.debug("Removing orphan node {}", dstNode);
 350             trans.delete(LogicalDatastoreType.OPERATIONAL, nodeIdentifier(dstNode));
 351         } else if (orphDstTp) {
 352             LOG.debug("Removing orphan TP {} on node {}", dstTp, dstNode);
 353             trans.delete(LogicalDatastoreType.OPERATIONAL, tpIdentifier(dstNode, dstTp));
 354         }
 355     }
 356
 357     @Override
 358     public void onDataChanged(final AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> change) {
 359         final ReadWriteTransaction trans = this.dataProvider.newReadWriteTransaction();
 360
 361         final Set<InstanceIdentifier<ReportedLsp>> lsps = new HashSet<>();
 362         final Set<InstanceIdentifier<Node>> nodes = new HashSet<>();
 363
 364         // Categorize reported identifiers
 365         for (final InstanceIdentifier<?> i : change.getRemovedPaths()) {
 366             categorizeIdentifier(i, lsps, nodes);
 367         }
 368         for (final InstanceIdentifier<?> i : change.getUpdatedData().keySet()) {
 369             categorizeIdentifier(i, lsps, nodes);
 370         }
 371         for (final InstanceIdentifier<?> i : change.getCreatedData().keySet()) {
 372             categorizeIdentifier(i, lsps, nodes);
 373         }
 374
 375         // Get the subtrees
 376         final Map<InstanceIdentifier<?>, ? extends DataObject> o = change.getOriginalData();
 377         final Map<InstanceIdentifier<?>, DataObject> n = change.getUpdatedData();
 378
 379         // Now walk all nodes, check for removals/additions and cascade them to LSPs
 380         for (final InstanceIdentifier<Node> i : nodes) {
 381             enumerateLsps(i, (Node) o.get(i), lsps);
 382             enumerateLsps(i, (Node) n.get(i), lsps);
 383         }
 384
 385         // We now have list of all affected LSPs. Walk them create/remove them
 386         for (final InstanceIdentifier<ReportedLsp> i : lsps) {
 387             final ReportedLsp oldValue = (ReportedLsp) o.get(i);
 388             final ReportedLsp newValue = (ReportedLsp) n.get(i);
 389
 390             LOG.debug("Updating lsp {} value {} -> {}", i, oldValue, newValue);
 391             if (oldValue != null) {
 392                 try {
 393                     remove(trans, i, oldValue);
 394                 } catch (InterruptedException | ExecutionException e) {
 395                     LOG.warn("Failed to remove LSP {}", i, e);
 396                 }
 397             }
 398             if (newValue != null) {
 399                 try {
 400                     create(trans, i, newValue);
 401                 } catch (InterruptedException | ExecutionException e) {
 402                     LOG.warn("Failed to add LSP {}", i, e);
 403                 }
 404             }
 405         }
 406
 407         Futures.addCallback(JdkFutureAdapters.listenInPoolThread(trans.submit()), new FutureCallback<Void>() {
 408             @Override
 409             public void onSuccess(final Void result) {
 410                 LOG.trace("Topology change committed successfully");
 411             }
 412
 413             @Override
 414             public void onFailure(final Throwable t) {
 415                 LOG.error("Failed to propagate a topology change, target topology became inconsistent", t);
 416             }
 417         });
 418     }
 419
 420     public static InstanceIdentifier<Link> linkIdentifier(final InstanceIdentifier<Topology> topology, final NodeId node, final String name) {
 421         return topology.child(Link.class, new LinkKey(new LinkId(node.getValue() + "/lsp/" + name)));
 422     }
 423 }