bgp/rib-impl/src/main/java/org/opendaylight/protocol/bgp/rib/impl/EffectiveRibInWriter.java

   1 /*
   2  * Copyright (c) 2015 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.protocol.bgp.rib.impl;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
  13 import com.google.common.base.Verify;
  14 import com.google.common.collect.ImmutableList;
  15 import com.google.common.collect.ImmutableMap;
  16 import com.google.common.collect.ImmutableSet;
  17 import com.google.common.util.concurrent.FluentFuture;
  18 import com.google.common.util.concurrent.FutureCallback;
  19 import com.google.common.util.concurrent.MoreExecutors;
  20 import java.util.Collection;
  21 import java.util.List;
  22 import java.util.Map;
  23 import java.util.Optional;
  24 import java.util.Set;
  25 import java.util.concurrent.ExecutionException;
  26 import java.util.concurrent.atomic.LongAdder;
  27 import javax.annotation.Nonnull;
  28 import javax.annotation.concurrent.GuardedBy;
  29 import javax.annotation.concurrent.NotThreadSafe;
  30 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  31 import org.opendaylight.controller.md.sal.dom.api.ClusteredDOMDataTreeChangeListener;
  32 import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeChangeService;
  33 import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeIdentifier;
  34 import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
  35 import org.opendaylight.controller.md.sal.dom.api.DOMTransactionChain;
  36 import org.opendaylight.mdsal.common.api.CommitInfo;
  37 import org.opendaylight.protocol.bgp.openconfig.spi.BGPTableTypeRegistryConsumer;
  38 import org.opendaylight.protocol.bgp.parser.impl.message.update.CommunityUtil;
  39 import org.opendaylight.protocol.bgp.rib.impl.spi.RIB;
  40 import org.opendaylight.protocol.bgp.rib.impl.spi.RIBSupportContext;
  41 import org.opendaylight.protocol.bgp.rib.impl.spi.RIBSupportContextRegistry;
  42 import org.opendaylight.protocol.bgp.rib.impl.spi.RibOutRefresh;
  43 import org.opendaylight.protocol.bgp.rib.impl.state.peer.PrefixesInstalledCounters;
  44 import org.opendaylight.protocol.bgp.rib.impl.state.peer.PrefixesReceivedCounters;
  45 import org.opendaylight.protocol.bgp.rib.spi.RIBSupport;
  46 import org.opendaylight.protocol.bgp.rib.spi.policy.BGPRibRoutingPolicy;
  47 import org.opendaylight.protocol.bgp.rib.spi.policy.BGPRouteEntryImportParameters;
  48 import org.opendaylight.protocol.bgp.route.targetcontrain.spi.ClientRouteTargetContrainCache;
  49 import org.opendaylight.protocol.bgp.route.targetcontrain.spi.RouteTargetMembeshipUtil;
  50 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.types.rev151009.AfiSafiType;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.Attributes;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.attributes.Communities;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.PeerRole;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.bgp.rib.rib.peer.AdjRibIn;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.bgp.rib.rib.peer.EffectiveRibIn;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.rib.Tables;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.rib.TablesKey;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.rib.tables.Routes;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.route.target.constrain.rev180618.RouteTargetConstrainSubsequentAddressFamily;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.route.target.constrain.rev180618.route.target.constrain.routes.route.target.constrain.routes.RouteTargetConstrainRoute;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.Ipv4AddressFamily;
  62 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.Ipv6AddressFamily;
  63 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.MplsLabeledVpnSubsequentAddressFamily;
  64 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.RouteTarget;
  65 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  66 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  67 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  68 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  69 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
  70 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  71 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  72 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodes;
  73 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
  74 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
  75 import org.opendaylight.yangtools.yang.data.api.schema.tree.ModificationType;
  76 import org.slf4j.Logger;
  77 import org.slf4j.LoggerFactory;
  78
  79 /**
  80  * Implementation of the BGP import policy. Listens on peer's Adj-RIB-In, inspects all inbound
  81  * routes in the context of the advertising peer's role and applies the inbound policy.
  82  *
  83  * <p>
  84  * Inbound policy is applied as follows:
  85  *
  86  * <p>
  87  * 1) if the peer is an eBGP peer, perform attribute replacement and filtering
  88  * 2) check if a route is admissible based on attributes attached to it, as well as the
  89  * advertising peer's role
  90  * 3) output admitting routes with edited attributes into /bgp-rib/rib/peer/effective-rib-in/tables/routes
  91  */
  92 @NotThreadSafe
  93 final class EffectiveRibInWriter implements PrefixesReceivedCounters, PrefixesInstalledCounters,
  94         AutoCloseable, ClusteredDOMDataTreeChangeListener {
  95
  96     private static final Logger LOG = LoggerFactory.getLogger(EffectiveRibInWriter.class);
  97     static final NodeIdentifier TABLE_ROUTES = new NodeIdentifier(Routes.QNAME);
  98     private static final TablesKey IVP4_VPN_TABLE_KEY = new TablesKey(Ipv4AddressFamily.class,
  99             MplsLabeledVpnSubsequentAddressFamily.class);
 100     private static final TablesKey IVP6_VPN_TABLE_KEY = new TablesKey(Ipv6AddressFamily.class,
 101             MplsLabeledVpnSubsequentAddressFamily.class);
 102     private static final ImmutableList<Communities> STALE_LLGR_COMMUNUTIES = ImmutableList.of(
 103         StaleCommunities.STALE_LLGR);
 104     private static final Attributes STALE_LLGR_ATTRIBUTES = new org.opendaylight.yang.gen.v1.urn.opendaylight.params
 105             .xml.ns.yang.bgp.message.rev180329.path.attributes.AttributesBuilder()
 106             .setCommunities(STALE_LLGR_COMMUNUTIES)
 107             .build();
 108
 109     private final RIBSupportContextRegistry registry;
 110     private final YangInstanceIdentifier peerIId;
 111     private final YangInstanceIdentifier effRibTables;
 112     private final DOMDataTreeChangeService service;
 113     private final List<RouteTarget> rtMemberships;
 114     private final RibOutRefresh vpnTableRefresher;
 115     private final ClientRouteTargetContrainCache rtCache;
 116     private ListenerRegistration<?> reg;
 117     private DOMTransactionChain chain;
 118     private final Map<TablesKey, LongAdder> prefixesReceived;
 119     private final Map<TablesKey, LongAdder> prefixesInstalled;
 120     private final BGPRibRoutingPolicy ribPolicies;
 121     private final BGPRouteEntryImportParameters peerImportParameters;
 122     private final BGPTableTypeRegistryConsumer tableTypeRegistry;
 123     @GuardedBy("this")
 124     private FluentFuture<? extends CommitInfo> submitted;
 125     private boolean rtMembershipsUpdated;
 126
 127     EffectiveRibInWriter(
 128             final BGPRouteEntryImportParameters peer,
 129             final RIB rib,
 130             final DOMTransactionChain chain,
 131             final YangInstanceIdentifier peerIId,
 132             final Set<TablesKey> tables,
 133             final BGPTableTypeRegistryConsumer tableTypeRegistry,
 134             final List<RouteTarget> rtMemberships,
 135             final ClientRouteTargetContrainCache rtCache) {
 136         this.registry = requireNonNull(rib.getRibSupportContext());
 137         this.chain = requireNonNull(chain);
 138         this.peerIId = requireNonNull(peerIId);
 139         this.effRibTables = this.peerIId.node(EffectiveRibIn.QNAME);
 140         this.prefixesInstalled = buildPrefixesTables(tables);
 141         this.prefixesReceived = buildPrefixesTables(tables);
 142         this.ribPolicies = requireNonNull(rib.getRibPolicies());
 143         this.service = requireNonNull(rib.getService());
 144         this.tableTypeRegistry = requireNonNull(tableTypeRegistry);
 145         this.peerImportParameters = peer;
 146         this.rtMemberships = rtMemberships;
 147         this.rtCache = rtCache;
 148         this.vpnTableRefresher = rib;
 149     }
 150
 151     public void init() {
 152         final DOMDataTreeIdentifier treeId = new DOMDataTreeIdentifier(LogicalDatastoreType.OPERATIONAL,
 153             this.peerIId.node(AdjRibIn.QNAME).node(Tables.QNAME));
 154         LOG.debug("Registered Effective RIB on {}", this.peerIId);
 155         this.reg = requireNonNull(this.service).registerDataTreeChangeListener(treeId, this);
 156     }
 157
 158     private static Map<TablesKey, LongAdder> buildPrefixesTables(final Set<TablesKey> tables) {
 159         final ImmutableMap.Builder<TablesKey, LongAdder> b = ImmutableMap.builder();
 160         tables.forEach(table -> b.put(table, new LongAdder()));
 161         return b.build();
 162     }
 163
 164     @Override
 165     public synchronized void onDataTreeChanged(@Nonnull final Collection<DataTreeCandidate> changes) {
 166         if (this.chain == null) {
 167             LOG.trace("Chain closed. Ignoring Changes : {}", changes);
 168             return;
 169         }
 170
 171         LOG.trace("Data changed called to effective RIB. Change : {}", changes);
 172         DOMDataWriteTransaction tx = null;
 173         for (final DataTreeCandidate tc : changes) {
 174             final YangInstanceIdentifier rootPath = tc.getRootPath();
 175             final DataTreeCandidateNode root = tc.getRootNode();
 176             for (final DataTreeCandidateNode table : root.getChildNodes()) {
 177                 if (tx == null) {
 178                     tx = this.chain.newWriteOnlyTransaction();
 179                 }
 180                 changeDataTree(tx, rootPath, root, table);
 181             }
 182         }
 183
 184         final FluentFuture<? extends CommitInfo> future = tx.commit();
 185         this.submitted = future;
 186         future.addCallback(new FutureCallback<CommitInfo>() {
 187             @Override
 188             public void onSuccess(final CommitInfo result) {
 189                 LOG.trace("Successful commit");
 190             }
 191
 192             @Override
 193             public void onFailure(final Throwable trw) {
 194                 LOG.error("Failed commit", trw);
 195             }
 196         }, MoreExecutors.directExecutor());
 197
 198         //Refresh VPN Table if RT Memberships were updated
 199         if (this.rtMembershipsUpdated) {
 200             this.vpnTableRefresher.refreshTable(IVP4_VPN_TABLE_KEY, this.peerImportParameters.getFromPeerId());
 201             this.vpnTableRefresher.refreshTable(IVP6_VPN_TABLE_KEY, this.peerImportParameters.getFromPeerId());
 202             this.rtMembershipsUpdated = false;
 203         }
 204     }
 205
 206     @GuardedBy("this")
 207     private void changeDataTree(
 208         final DOMDataWriteTransaction tx,
 209         final YangInstanceIdentifier rootPath,
 210         final DataTreeCandidateNode root,
 211         final DataTreeCandidateNode table) {
 212         final PathArgument lastArg = table.getIdentifier();
 213         Verify.verify(lastArg instanceof NodeIdentifierWithPredicates,
 214             "Unexpected type %s in path %s", lastArg.getClass(), rootPath);
 215         final NodeIdentifierWithPredicates tableKey = (NodeIdentifierWithPredicates) lastArg;
 216         final ModificationType modificationType = root.getModificationType();
 217         final RIBSupport ribSupport = this.registry.getRIBSupport(tableKey);
 218         final TablesKey tk = ribSupport.getTablesKey();
 219         final YangInstanceIdentifier effectiveTablePath = effectiveTablePath(tableKey);
 220
 221         switch (modificationType) {
 222             case DISAPPEARED:
 223             case DELETE:
 224                 processTableChildren(tx, ribSupport, effectiveTablePath, table.getChildNodes());
 225                 LOG.debug("Delete Effective Table {} modification type {}, ", effectiveTablePath, modificationType);
 226                 tx.delete(LogicalDatastoreType.OPERATIONAL, effectiveTablePath);
 227                 break;
 228             case APPEARED:
 229             case WRITE:
 230                 final RIBSupportContext ctx = this.registry.getRIBSupportContext(tk);
 231                 LOG.trace("Create Empty table {}", tk);
 232                 ctx.createEmptyTableStructure(tx, effectiveTablePath);
 233                 processTableChildren(tx, ribSupport, effectiveTablePath, table.getChildNodes());
 234                 break;
 235             case SUBTREE_MODIFIED:
 236                 processTableChildren(tx, ribSupport, effectiveTablePath, table.getChildNodes());
 237                 break;
 238             case UNMODIFIED:
 239                 LOG.info("Ignoring spurious notification on {} data {}", rootPath, table);
 240                 break;
 241             default:
 242                 LOG.warn("Ignoring unhandled root {}", table);
 243                 break;
 244         }
 245     }
 246
 247     private void processTableChildren(
 248         final DOMDataWriteTransaction tx,
 249         final RIBSupport ribSupport,
 250         final YangInstanceIdentifier effectiveTablePath,
 251         final Collection<DataTreeCandidateNode> children) {
 252         for (final DataTreeCandidateNode child : children) {
 253             final PathArgument childIdentifier = child.getIdentifier();
 254             final Optional<NormalizedNode<?, ?>> childDataAfter = child.getDataAfter();
 255             LOG.debug("Process table {} type {}, dataAfter {}, dataBefore {}", childIdentifier, child
 256                 .getModificationType(), childDataAfter, child.getDataBefore());
 257             final YangInstanceIdentifier routesPath = effectiveTablePath.node(childIdentifier);
 258             switch (child.getModificationType()) {
 259                 case DELETE:
 260                 case DISAPPEARED:
 261                     processDeleteRouteTables(child, childIdentifier, ribSupport, routesPath);
 262                     tx.delete(LogicalDatastoreType.OPERATIONAL, routesPath);
 263                     LOG.debug("Route deleted. routeId={}", routesPath);
 264                     break;
 265                 case UNMODIFIED:
 266                     // No-op
 267                     break;
 268                 case SUBTREE_MODIFIED:
 269                     processModifiedRouteTables(child, childIdentifier,tx, ribSupport, routesPath, childDataAfter);
 270                     break;
 271                 case APPEARED:
 272                 case WRITE:
 273                     writeRouteTables(child, childIdentifier, tx, ribSupport, routesPath, childDataAfter);
 274                     break;
 275                 default:
 276                     LOG.warn("Ignoring unhandled child {}", child);
 277                     break;
 278             }
 279         }
 280     }
 281
 282     private void processDeleteRouteTables(
 283         final DataTreeCandidateNode child,
 284         final PathArgument childIdentifier,
 285         final RIBSupport ribSupport,
 286         final YangInstanceIdentifier routesPath) {
 287         if (TABLE_ROUTES.equals(childIdentifier)) {
 288             final Collection<DataTreeCandidateNode> changedRoutes = ribSupport.changedRoutes(child);
 289             for (final DataTreeCandidateNode route : changedRoutes) {
 290                 handleRouteTarget(ModificationType.DELETE, ribSupport, routesPath.getParent(),
 291                     route.getDataBefore().orElse(null));
 292                 final TablesKey tablesKey = ribSupport.getTablesKey();
 293                 CountersUtil.decrement(this.prefixesInstalled.get(tablesKey), tablesKey);
 294             }
 295         }
 296     }
 297
 298     private void processModifiedRouteTables(
 299         final DataTreeCandidateNode child,
 300         final PathArgument childIdentifier,
 301         final DOMDataWriteTransaction tx,
 302         final RIBSupport ribSupport,
 303         final YangInstanceIdentifier routesPath,
 304         final Optional<NormalizedNode<?, ?>> childDataAfter) {
 305         if (TABLE_ROUTES.equals(childIdentifier)) {
 306             final Collection<DataTreeCandidateNode> changedRoutes = ribSupport.changedRoutes(child);
 307             for (final DataTreeCandidateNode route : changedRoutes) {
 308                 processRoute(tx, ribSupport, routesPath.getParent(), route);
 309             }
 310         } else {
 311             tx.put(LogicalDatastoreType.OPERATIONAL, routesPath, childDataAfter.get());
 312         }
 313     }
 314
 315     private void writeRouteTables(
 316         final DataTreeCandidateNode child,
 317         final PathArgument childIdentifier,
 318         final DOMDataWriteTransaction tx,
 319         final RIBSupport ribSupport,
 320         final YangInstanceIdentifier routesPath,
 321         final Optional<NormalizedNode<?, ?>> childDataAfter) {
 322         if (TABLE_ROUTES.equals(childIdentifier)) {
 323             final Collection<DataTreeCandidateNode> changedRoutes = ribSupport.changedRoutes(child);
 324             if (!changedRoutes.isEmpty()) {
 325                 tx.put(LogicalDatastoreType.OPERATIONAL, routesPath, childDataAfter.get());
 326                 // Routes are special, as they may end up being filtered. The previous put conveniently
 327                 // ensured that we have them in at target, so a subsequent delete will not fail :)
 328                 for (final DataTreeCandidateNode route : changedRoutes) {
 329                     processRoute(tx, ribSupport, routesPath.getParent(), route);
 330                 }
 331             }
 332         }
 333     }
 334
 335     private void processRoute(
 336         final DOMDataWriteTransaction tx,
 337         final RIBSupport ribSupport,
 338         final YangInstanceIdentifier routesPath,
 339         final DataTreeCandidateNode route) {
 340         LOG.debug("Process route {}", route.getIdentifier());
 341         final YangInstanceIdentifier routePath = ribSupport.routePath(routesPath, route.getIdentifier());
 342         final TablesKey tablesKey = ribSupport.getTablesKey();
 343         switch (route.getModificationType()) {
 344             case DELETE:
 345             case DISAPPEARED:
 346                 deleteRoute(tx, ribSupport, routePath, route.getDataBefore().orElse(null), tablesKey);
 347                 break;
 348             case UNMODIFIED:
 349                 // No-op
 350                 break;
 351             case APPEARED:
 352             case SUBTREE_MODIFIED:
 353             case WRITE:
 354                 CountersUtil.increment(this.prefixesReceived.get(tablesKey), tablesKey);
 355                 // Lookup per-table attributes from RIBSupport
 356                 final ContainerNode advertisedAttrs = (ContainerNode) NormalizedNodes.findNode(route.getDataAfter(),
 357                     ribSupport.routeAttributesIdentifier()).orElse(null);
 358                 final Attributes routeAttrs = ribSupport.attributeFromContainerNode(advertisedAttrs);
 359                 final Optional<Attributes> optEffAtt;
 360                 // In case we want to add LLGR_STALE we do not process route through policies since it may be
 361                 // considered as received with LLGR_STALE from peer which is not true.
 362                 final boolean longLivedStale = false;
 363                 if (longLivedStale) {
 364                     // LLGR procedures are in effect. If the route is tagged with NO_LLGR, it needs to be removed.
 365                     final List<Communities> effCommunities = routeAttrs.getCommunities();
 366                     if (effCommunities != null && effCommunities.contains(CommunityUtil.NO_LLGR)) {
 367                         deleteRoute(tx, ribSupport, routePath, route.getDataBefore().orElse(null), tablesKey);
 368                         return;
 369                     }
 370                     optEffAtt = Optional.of(wrapLongLivedStale(routeAttrs));
 371                 } else {
 372                     final Class<? extends AfiSafiType> afiSafiType
 373                         = tableTypeRegistry.getAfiSafiType(ribSupport.getTablesKey()).get();
 374                     optEffAtt = this.ribPolicies
 375                         .applyImportPolicies(this.peerImportParameters, routeAttrs, afiSafiType);
 376                 }
 377                 if (!optEffAtt.isPresent()) {
 378                     deleteRoute(tx, ribSupport, routePath, route.getDataBefore().orElse(null), tablesKey);
 379                     return;
 380                 }
 381                 final NormalizedNode<?, ?> routeChanged = route.getDataAfter().get();
 382                 handleRouteTarget(ModificationType.WRITE, ribSupport, routePath, routeChanged);
 383                 tx.put(LogicalDatastoreType.OPERATIONAL, routePath, routeChanged);
 384                 CountersUtil.increment(this.prefixesInstalled.get(tablesKey), tablesKey);
 385
 386                 final YangInstanceIdentifier attPath = routePath.node(ribSupport.routeAttributesIdentifier());
 387                 final ContainerNode finalAttribute = ribSupport.attributeToContainerNode(attPath, optEffAtt.get());
 388                 tx.put(LogicalDatastoreType.OPERATIONAL, attPath, finalAttribute);
 389                 break;
 390             default:
 391                 LOG.warn("Ignoring unhandled route {}", route);
 392                 break;
 393         }
 394     }
 395
 396     private void deleteRoute(
 397         final DOMDataWriteTransaction tx,
 398         final RIBSupport ribSupport,
 399         final YangInstanceIdentifier routeIdPath,
 400         final NormalizedNode<?, ?> route,
 401         final TablesKey tablesKey) {
 402         handleRouteTarget(ModificationType.DELETE, ribSupport, routeIdPath, route);
 403         tx.delete(LogicalDatastoreType.OPERATIONAL, routeIdPath);
 404         LOG.debug("Route deleted. routeId={}", routeIdPath);
 405         CountersUtil.decrement(this.prefixesInstalled.get(tablesKey), tablesKey);
 406     }
 407
 408     private void handleRouteTarget(
 409         final ModificationType modificationType,
 410         final RIBSupport ribSupport,
 411         final YangInstanceIdentifier routeIdPath,
 412         final NormalizedNode<?, ?> route) {
 413         if (ribSupport.getSafi() == RouteTargetConstrainSubsequentAddressFamily.class) {
 414             final RouteTargetConstrainRoute rtc =
 415                 (RouteTargetConstrainRoute) ribSupport.fromNormalizedNode(routeIdPath, route);
 416             final RouteTarget rtMembership = RouteTargetMembeshipUtil.getRT(rtc);
 417             if (ModificationType.DELETE == modificationType) {
 418                 if (PeerRole.Ebgp != this.peerImportParameters.getFromPeerRole()) {
 419                     this.rtCache.uncacheRoute(rtc);
 420                 }
 421                 this.rtMemberships.remove(rtMembership);
 422             } else {
 423                 if (PeerRole.Ebgp != this.peerImportParameters.getFromPeerRole()) {
 424                     this.rtCache.cacheRoute(rtc);
 425                 }
 426                 this.rtMemberships.add(rtMembership);
 427             }
 428             this.rtMembershipsUpdated = true;
 429         }
 430     }
 431
 432     @SuppressFBWarnings("UPM_UNCALLED_PRIVATE_METHOD")
 433     private static Attributes wrapLongLivedStale(final Attributes attrs) {
 434         if (attrs == null) {
 435             return STALE_LLGR_ATTRIBUTES;
 436         }
 437
 438         final List<Communities> oldCommunities = attrs.getCommunities();
 439         final List<Communities> newCommunities;
 440         if (oldCommunities != null) {
 441             if (oldCommunities.contains(StaleCommunities.STALE_LLGR)) {
 442                 return attrs;
 443             }
 444             newCommunities = StaleCommunities.create(oldCommunities);
 445         } else {
 446             newCommunities = STALE_LLGR_COMMUNUTIES;
 447         }
 448
 449         return new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329
 450                 .path.attributes.AttributesBuilder(attrs).setCommunities(newCommunities).build();
 451     }
 452
 453     private YangInstanceIdentifier effectiveTablePath(final NodeIdentifierWithPredicates tableKey) {
 454         return this.effRibTables.node(Tables.QNAME).node(tableKey);
 455     }
 456
 457     @Override
 458     public synchronized void close() {
 459         if (this.reg != null) {
 460             this.reg.close();
 461             this.reg = null;
 462         }
 463         if (this.submitted != null) {
 464             try {
 465                 this.submitted.get();
 466             } catch (final InterruptedException | ExecutionException throwable) {
 467                 LOG.error("Write routes failed", throwable);
 468             }
 469         }
 470         if (this.chain != null) {
 471             this.chain.close();
 472             this.chain = null;
 473         }
 474         this.prefixesReceived.values().forEach(LongAdder::reset);
 475         this.prefixesInstalled.values().forEach(LongAdder::reset);
 476     }
 477
 478     @Override
 479     public long getPrefixedReceivedCount(final TablesKey tablesKey) {
 480         final LongAdder counter = this.prefixesReceived.get(tablesKey);
 481         if (counter == null) {
 482             return 0;
 483         }
 484         return counter.longValue();
 485     }
 486
 487     @Override
 488     public Set<TablesKey> getTableKeys() {
 489         return ImmutableSet.copyOf(this.prefixesReceived.keySet());
 490     }
 491
 492     @Override
 493     public boolean isSupported(final TablesKey tablesKey) {
 494         return this.prefixesReceived.containsKey(tablesKey);
 495     }
 496
 497     @Override
 498     public long getPrefixedInstalledCount(final TablesKey tablesKey) {
 499         final LongAdder counter = this.prefixesInstalled.get(tablesKey);
 500         if (counter == null) {
 501             return 0;
 502         }
 503         return counter.longValue();
 504     }
 505
 506     @Override
 507     public long getTotalPrefixesInstalled() {
 508         return this.prefixesInstalled.values().stream().mapToLong(LongAdder::longValue).sum();
 509     }
 510 }