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 java.util.HashSet;
  11 import java.util.Map;
  12 import java.util.Set;
  13
  14 import org.opendaylight.controller.md.sal.common.api.TransactionStatus;
  15 import org.opendaylight.controller.md.sal.common.api.data.DataChangeEvent;
  16 import org.opendaylight.controller.sal.binding.api.data.DataChangeListener;
  17 import org.opendaylight.controller.sal.binding.api.data.DataModificationTransaction;
  18 import org.opendaylight.controller.sal.binding.api.data.DataProviderService;
  19 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpAddress;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.ReportedLsp1;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.SymbolicPathName;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.lsp.identifiers.tlv.lsp.identifiers.AddressFamily;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.endpoints.address.family.Ipv4Case;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.endpoints.address.family.Ipv6Case;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.endpoints.address.family.ipv4._case.Ipv4;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.endpoints.address.family.ipv6._case.Ipv6;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.Node1;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.pcep.client.attributes.PathComputationClient;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.pcep.client.attributes.path.computation.client.ReportedLsp;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.AdministrativeStatus;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.Link1;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.Link1Builder;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.SupportingNode1;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.SupportingNode1Builder;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.tunnel.pcep.supporting.node.attributes.PathComputationClientBuilder;
  36 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.LinkId;
  37 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
  38 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TpId;
  39 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.link.attributes.DestinationBuilder;
  40 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.link.attributes.SourceBuilder;
  41 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  42 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Link;
  43 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.LinkBuilder;
  44 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.LinkKey;
  45 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  46 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeBuilder;
  47 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
  48 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.node.TerminationPoint;
  49 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.node.TerminationPointBuilder;
  50 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.node.TerminationPointKey;
  51 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.node.attributes.SupportingNode;
  52 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.node.attributes.SupportingNodeBuilder;
  53 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.node.attributes.SupportingNodeKey;
  54 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.TerminationPoint1;
  55 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.TerminationPoint1Builder;
  56 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.termination.point.attributes.IgpTerminationPointAttributesBuilder;
  57 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;
  58 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;
  59 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;
  60 import org.opendaylight.yangtools.yang.binding.DataObject;
  61 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  62 import org.opendaylight.yangtools.yang.common.RpcResult;
  63 import org.slf4j.Logger;
  64 import org.slf4j.LoggerFactory;
  65
  66 import com.google.common.base.Charsets;
  67 import com.google.common.base.Preconditions;
  68 import com.google.common.collect.Lists;
  69 import com.google.common.util.concurrent.FutureCallback;
  70 import com.google.common.util.concurrent.Futures;
  71 import com.google.common.util.concurrent.JdkFutureAdapters;
  72
  73 public final class NodeChangedListener implements DataChangeListener {
  74         public static final Logger LOG = LoggerFactory.getLogger(NodeChangedListener.class);
  75         private final InstanceIdentifier<Topology> target;
  76         private final DataProviderService dataProvider;
  77
  78         NodeChangedListener(final DataProviderService dataProvider, final InstanceIdentifier<Topology> target) {
  79                 this.dataProvider = Preconditions.checkNotNull(dataProvider);
  80                 this.target = Preconditions.checkNotNull(target);
  81         }
  82
  83         private static void categorizeIdentifier(final InstanceIdentifier<?> i, final Set<InstanceIdentifier<ReportedLsp>> changedLsps,
  84                         final Set<InstanceIdentifier<Node>> changedNodes) {
  85                 final InstanceIdentifier<ReportedLsp> li = i.firstIdentifierOf(ReportedLsp.class);
  86                 if (li == null) {
  87                         final InstanceIdentifier<Node> ni = i.firstIdentifierOf(Node.class);
  88                         if (ni == null) {
  89                                 LOG.warn("Ignoring uncategorized identifier {}", i);
  90                         } else {
  91                                 changedNodes.add(ni);
  92                         }
  93                 } else {
  94                         changedLsps.add(li);
  95                 }
  96         }
  97
  98         private static void enumerateLsps(final InstanceIdentifier<Node> id, final Node node, final Set<InstanceIdentifier<ReportedLsp>> lsps) {
  99                 if (node == null) {
 100                         LOG.trace("Skipping null node", id);
 101                         return;
 102                 }
 103                 final Node1 pccnode = node.getAugmentation(Node1.class);
 104                 if (pccnode == null) {
 105                         LOG.trace("Skipping non-PCEP-enabled node {}", id);
 106                         return;
 107                 }
 108
 109                 for (final ReportedLsp l : pccnode.getPathComputationClient().getReportedLsp()) {
 110                         lsps.add(InstanceIdentifier.builder(id).augmentation(Node1.class).child(PathComputationClient.class).child(ReportedLsp.class,
 111                                         l.getKey()).toInstance());
 112                 }
 113         }
 114
 115         private static LinkId linkIdForLsp(final InstanceIdentifier<ReportedLsp> i, final ReportedLsp lsp) {
 116                 return new LinkId(i.firstKeyOf(Node.class, NodeKey.class).getNodeId().getValue() + "/lsps/" + lsp.getName());
 117         }
 118
 119         private InstanceIdentifier<Link> linkForLsp(final LinkId linkId) {
 120                 return InstanceIdentifier.builder(this.target).child(Link.class, new LinkKey(linkId)).toInstance();
 121         }
 122
 123         private SupportingNode createSupportingNode(final NodeId sni, final Boolean inControl) {
 124                 final SupportingNodeKey sk = new SupportingNodeKey(sni);
 125                 final SupportingNodeBuilder snb = new SupportingNodeBuilder();
 126                 snb.setNodeRef(sni);
 127                 snb.setKey(sk);
 128                 snb.addAugmentation(
 129                                 SupportingNode1.class,
 130                                 new SupportingNode1Builder().setPathComputationClient(new PathComputationClientBuilder().setControlling(inControl).build()).build());
 131
 132                 return snb.build();
 133         }
 134
 135         private InstanceIdentifier<TerminationPoint> getIpTerminationPoint(final DataModificationTransaction trans, final IpAddress addr,
 136                         final InstanceIdentifier<Node> sni, final Boolean inControl) {
 137                 for (final Node n : ((Topology) trans.readOperationalData(this.target)).getNode()) {
 138                         for (final TerminationPoint tp : n.getTerminationPoint()) {
 139                                 final TerminationPoint1 tpa = tp.getAugmentation(TerminationPoint1.class);
 140
 141                                 if (tpa != null) {
 142                                         final TerminationPointType tpt = tpa.getIgpTerminationPointAttributes().getTerminationPointType();
 143
 144                                         if (tpt instanceof Ip) {
 145                                                 for (final IpAddress a : ((Ip) tpt).getIpAddress()) {
 146                                                         if (addr.equals(a.getIpv6Address())) {
 147                                                                 if (sni != null) {
 148                                                                         final NodeKey k = InstanceIdentifier.keyOf(sni);
 149                                                                         boolean have = false;
 150
 151                                                                         /*
 152                                                                          * We may have found a termination point which has been created as a destination,
 153                                                                          * so it does not have a supporting node pointer. Since we now know what it is,
 154                                                                          * fill it in.
 155                                                                          */
 156                                                                         for (final SupportingNode sn : n.getSupportingNode()) {
 157                                                                                 if (sn.getNodeRef().equals(k.getNodeId())) {
 158                                                                                         have = true;
 159                                                                                         break;
 160                                                                                 }
 161                                                                         }
 162
 163                                                                         if (!have) {
 164                                                                                 final SupportingNode sn = createSupportingNode(k.getNodeId(), inControl);
 165
 166                                                                                 trans.putOperationalData(
 167                                                                                                 InstanceIdentifier.builder(this.target).child(Node.class, n.getKey()).child(
 168                                                                                                                 SupportingNode.class, sn.getKey()).toInstance(), sn);
 169                                                                         }
 170                                                                 }
 171                                                                 return InstanceIdentifier.builder(this.target).child(Node.class, n.getKey()).child(TerminationPoint.class,
 172                                                                                 tp.getKey()).toInstance();
 173                                                         }
 174                                                 }
 175                                         } else {
 176                                                 LOG.debug("Ignoring termination point type {}", tpt);
 177                                         }
 178                                 }
 179                         }
 180                 }
 181
 182                 LOG.debug("Termination point for {} not found, creating a new one", addr);
 183
 184                 final String url = "ip://" + addr.toString();
 185                 final TerminationPointKey tpk = new TerminationPointKey(new TpId(url));
 186                 final TerminationPointBuilder tpb = new TerminationPointBuilder();
 187                 tpb.setKey(tpk).setTpId(tpk.getTpId());
 188                 tpb.addAugmentation(
 189                                 TerminationPoint1.class,
 190                                 new TerminationPoint1Builder().setIgpTerminationPointAttributes(
 191                                                 new IgpTerminationPointAttributesBuilder().setTerminationPointType(
 192                                                                 new IpBuilder().setIpAddress(Lists.newArrayList(addr)).build()).build()).build());
 193
 194                 final NodeKey nk = new NodeKey(new NodeId(url));
 195                 final NodeBuilder nb = new NodeBuilder();
 196                 nb.setKey(nk).setNodeId(nk.getNodeId());
 197                 nb.setTerminationPoint(Lists.newArrayList(tpb.build()));
 198                 if (sni != null) {
 199                         nb.setSupportingNode(Lists.newArrayList(createSupportingNode(InstanceIdentifier.keyOf(sni).getNodeId(), inControl)));
 200                 }
 201
 202                 trans.putOperationalData(InstanceIdentifier.builder(this.target).child(Node.class, nb.getKey()).toInstance(), nb.build());
 203                 return InstanceIdentifier.builder(this.target).child(Node.class, nb.getKey()).child(TerminationPoint.class, tpb.getKey()).toInstance();
 204         }
 205
 206         private void create(final DataModificationTransaction trans, final InstanceIdentifier<ReportedLsp> i, final ReportedLsp value) {
 207                 final InstanceIdentifier<Node> ni = i.firstIdentifierOf(Node.class);
 208                 final ReportedLsp1 rl = value.getAugmentation(ReportedLsp1.class);
 209
 210                 final AddressFamily af = rl.getLsp().getTlvs().getLspIdentifiers().getAddressFamily();
 211
 212                 /*
 213                  * We are trying to ensure we have source and destination nodes.
 214                  */
 215                 final IpAddress srcIp, dstIp;
 216                 if (af instanceof Ipv4Case) {
 217                         final Ipv4 ipv4 = ((Ipv4Case) af).getIpv4();
 218                         srcIp = new IpAddress(ipv4.getSourceIpv4Address());
 219                         dstIp = new IpAddress(ipv4.getDestinationIpv4Address());
 220                 } else if (af instanceof Ipv6Case) {
 221                         final Ipv6 ipv6 = ((Ipv6Case) af).getIpv6();
 222                         srcIp = new IpAddress(ipv6.getSourceIpv6Address());
 223                         dstIp = new IpAddress(ipv6.getDestinationIpv6Address());
 224                 } else {
 225                         throw new IllegalArgumentException("Unsupported address family: " + af.getImplementedInterface());
 226                 }
 227
 228                 final Link1Builder lab = new Link1Builder(value.getPath().getLspa());
 229                 lab.setBandwidth(value.getPath().getBandwidth().getBandwidth());
 230                 lab.setClassType(value.getPath().getClassType().getClassType());
 231                 lab.setSymbolicPathName(new SymbolicPathName(value.getName().getBytes(Charsets.UTF_8)));
 232
 233                 final InstanceIdentifier<TerminationPoint> dst = getIpTerminationPoint(trans, dstIp, null, Boolean.FALSE);
 234                 final InstanceIdentifier<TerminationPoint> src = getIpTerminationPoint(trans, srcIp, ni, rl.getLsp().isDelegate());;
 235                 lab.setOperationalStatus(rl.getLsp().getOperational());
 236                 lab.setAdministrativeStatus(rl.getLsp().isAdministrative() ? AdministrativeStatus.Active : AdministrativeStatus.Inactive);
 237
 238                 final LinkId id = linkIdForLsp(i, value);
 239                 final LinkBuilder lb = new LinkBuilder();
 240                 lb.setLinkId(id);
 241
 242                 lb.setSource(new SourceBuilder().setSourceNode(src.firstKeyOf(Node.class, NodeKey.class).getNodeId()).setSourceTp(
 243                                 src.firstKeyOf(TerminationPoint.class, TerminationPointKey.class).getTpId()).build());
 244                 lb.setDestination(new DestinationBuilder().setDestNode(dst.firstKeyOf(Node.class, NodeKey.class).getNodeId()).setDestTp(
 245                                 dst.firstKeyOf(TerminationPoint.class, TerminationPointKey.class).getTpId()).build());
 246                 lb.addAugmentation(Link1.class, lab.build());
 247
 248                 trans.putOperationalData(linkForLsp(id), lb.build());
 249         }
 250
 251         private InstanceIdentifier<TerminationPoint> tpIdentifier(final NodeId node, final TpId tp) {
 252                 return InstanceIdentifier.builder(this.target).child(Node.class, new NodeKey(node)).child(TerminationPoint.class, new TerminationPointKey(tp)).toInstance();
 253         }
 254
 255         private InstanceIdentifier<Node> nodeIdentifier(final NodeId node) {
 256                 return InstanceIdentifier.builder(this.target).child(Node.class, new NodeKey(node)).toInstance();
 257         }
 258
 259         private void remove(final DataModificationTransaction trans, final InstanceIdentifier<ReportedLsp> i, final ReportedLsp value) {
 260                 final InstanceIdentifier<Link> li = linkForLsp(linkIdForLsp(i, value));
 261
 262                 final Link l = (Link) trans.readOperationalData(li);
 263                 if (l != null) {
 264                         LOG.debug("Removing link {} (was {})", li, l);
 265                         trans.removeOperationalData(li);
 266
 267                         LOG.debug("Searching for orphan links/nodes");
 268                         final Topology t = (Topology) trans.readOperationalData(InstanceIdentifier.builder(this.target).toInstance());
 269
 270                         NodeId srcNode = l.getSource().getSourceNode();
 271                         NodeId dstNode = l.getDestination().getDestNode();
 272                         TpId srcTp = l.getSource().getSourceTp();
 273                         TpId dstTp = l.getDestination().getDestTp();
 274
 275                         boolean orphSrcNode = true, orphDstNode = true, orphDstTp = true, orphSrcTp = true;
 276                         for (final Link lw : t.getLink()) {
 277                                 LOG.trace("Checking link {}", lw);
 278
 279                                 final NodeId sn = lw.getSource().getSourceNode();
 280                                 final NodeId dn = lw.getDestination().getDestNode();
 281                                 final TpId st = lw.getSource().getSourceTp();
 282                                 final TpId dt = lw.getDestination().getDestTp();
 283
 284                                 // Source node checks
 285                                 if (srcNode.equals(sn)) {
 286                                         if (orphSrcNode) {
 287                                                 LOG.debug("Node {} held by source of link {}", srcNode, lw);
 288                                                 orphSrcNode = false;
 289                                         }
 290                                         if (orphSrcTp && srcTp.equals(st)) {
 291                                                 LOG.debug("TP {} held by source of link {}", srcTp, lw);
 292                                                 orphSrcTp = false;
 293                                         }
 294                                 }
 295                                 if (srcNode.equals(dn)) {
 296                                         if (orphSrcNode) {
 297                                                 LOG.debug("Node {} held by destination of link {}", srcNode, lw);
 298                                                 orphSrcNode = false;
 299                                         }
 300                                         if (orphSrcTp && srcTp.equals(dt)) {
 301                                                 LOG.debug("TP {} held by destination of link {}", srcTp, lw);
 302                                                 orphSrcTp = false;
 303                                         }
 304                                 }
 305
 306                                 // Destination node checks
 307                                 if (dstNode.equals(sn)) {
 308                                         if (orphDstNode) {
 309                                                 LOG.debug("Node {} held by source of link {}", dstNode, lw);
 310                                                 orphDstNode = false;
 311                                         }
 312                                         if (orphDstTp && dstTp.equals(st)) {
 313                                                 LOG.debug("TP {} held by source of link {}", dstTp, lw);
 314                                                 orphDstTp = false;
 315                                         }
 316                                 }
 317                                 if (dstNode.equals(dn)) {
 318                                         if (orphDstNode) {
 319                                                 LOG.debug("Node {} held by destination of link {}", dstNode, lw);
 320                                                 orphDstNode = false;
 321                                         }
 322                                         if (orphDstTp && dstTp.equals(dt)) {
 323                                                 LOG.debug("TP {} held by destination of link {}", dstTp, lw);
 324                                                 orphDstTp = false;
 325                                         }
 326                                 }
 327                         }
 328
 329                         if (orphSrcNode && !orphSrcTp) {
 330                                 LOG.warn("Orphan source node {} but not TP {}, retaining the node", srcNode, srcTp);
 331                                 orphSrcNode = false;
 332                         }
 333                         if (orphDstNode && !orphDstTp) {
 334                                 LOG.warn("Orphan destination node {} but not TP {}, retaining the node", dstNode, dstTp);
 335                                 orphDstNode = false;
 336                         }
 337
 338                         if (orphSrcNode) {
 339                                 LOG.debug("Removing orphan node {}", srcNode);
 340                                 trans.removeOperationalData(nodeIdentifier(srcNode));
 341                         } else if (orphSrcTp) {
 342                                 LOG.debug("Removing orphan TP {} on node {}", srcTp, srcNode);
 343                                 trans.removeOperationalData(tpIdentifier(srcNode, srcTp));
 344                         }
 345                         if (orphDstNode) {
 346                                 LOG.debug("Removing orphan node {}", dstNode);
 347                                 trans.removeOperationalData(nodeIdentifier(dstNode));
 348                         } else if (orphDstTp) {
 349                                 LOG.debug("Removing orphan TP {} on node {}", dstTp, dstNode);
 350                                 trans.removeOperationalData(tpIdentifier(dstNode, dstTp));
 351                         }
 352                 }
 353         }
 354
 355         @Override
 356         public void onDataChanged(final DataChangeEvent<InstanceIdentifier<?>, DataObject> change) {
 357                 final DataModificationTransaction trans = this.dataProvider.beginTransaction();
 358
 359                 final Set<InstanceIdentifier<ReportedLsp>> lsps = new HashSet<>();
 360                 final Set<InstanceIdentifier<Node>> nodes = new HashSet<>();
 361
 362                 // Categorize reported identifiers
 363                 for (final InstanceIdentifier<?> i : change.getRemovedOperationalData()) {
 364                         categorizeIdentifier(i, lsps, nodes);
 365                 }
 366                 for (final InstanceIdentifier<?> i : change.getUpdatedOperationalData().keySet()) {
 367                         categorizeIdentifier(i, lsps, nodes);
 368                 }
 369                 for (final InstanceIdentifier<?> i : change.getCreatedOperationalData().keySet()) {
 370                         categorizeIdentifier(i, lsps, nodes);
 371                 }
 372
 373                 // Get the subtrees
 374                 final Map<InstanceIdentifier<?>, DataObject> o = change.getOriginalOperationalData();
 375                 final Map<InstanceIdentifier<?>, DataObject> n = change.getUpdatedOperationalData();
 376
 377                 // Now walk all nodes, check for removals/additions and cascade them to LSPs
 378                 for (final InstanceIdentifier<Node> i : nodes) {
 379                         enumerateLsps(i, (Node) o.get(i), lsps);
 380                         enumerateLsps(i, (Node) n.get(i), lsps);
 381                 }
 382
 383                 // We now have list of all affected LSPs. Walk them create/remove them
 384                 for (final InstanceIdentifier<ReportedLsp> i : lsps) {
 385                         final ReportedLsp oldValue = (ReportedLsp) o.get(i);
 386                         final ReportedLsp newValue = (ReportedLsp) n.get(i);
 387
 388                         LOG.debug("Updating lsp {} value {} -> {}", i, oldValue, newValue);
 389                         if (oldValue != null) {
 390                                 remove(trans, i, oldValue);
 391                         }
 392                         if (newValue != null) {
 393                                 create(trans, i, newValue);
 394                         }
 395                 }
 396
 397                 Futures.addCallback(JdkFutureAdapters.listenInPoolThread(trans.commit()), new FutureCallback<RpcResult<TransactionStatus>>() {
 398                         @Override
 399                         public void onSuccess(final RpcResult<TransactionStatus> result) {
 400                                 LOG.trace("Topology change committed successfully");
 401                         }
 402
 403                         @Override
 404                         public void onFailure(final Throwable t) {
 405                                 LOG.error("Failed to propagate a topology change, target topology became inconsistent", t);
 406                         }
 407                 });
 408         }
 409
 410         public static InstanceIdentifier<Link> linkIdentifier(final InstanceIdentifier<Topology> topology, final NodeId node,
 411                         final String name) {
 412                 return InstanceIdentifier.builder(topology).child(Link.class, new LinkKey(new LinkId(node.getValue() + "/lsp/" + name))).toInstance();
 413         }
 414 }