bgp/rib-impl/src/main/java/org/opendaylight/protocol/bgp/rib/impl/AdjRibInWriter.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 import static org.opendaylight.protocol.bgp.rib.spi.RIBNodeIdentifiers.ADJRIBIN;
  12 import static org.opendaylight.protocol.bgp.rib.spi.RIBNodeIdentifiers.ADJRIBOUT;
  13 import static org.opendaylight.protocol.bgp.rib.spi.RIBNodeIdentifiers.ATTRIBUTES;
  14 import static org.opendaylight.protocol.bgp.rib.spi.RIBNodeIdentifiers.EFFRIBIN;
  15 import static org.opendaylight.protocol.bgp.rib.spi.RIBNodeIdentifiers.TABLES;
  16
  17 import com.google.common.annotations.VisibleForTesting;
  18 import com.google.common.base.Optional;
  19 import com.google.common.collect.ImmutableMap;
  20 import com.google.common.collect.ImmutableMap.Builder;
  21 import com.google.common.util.concurrent.FluentFuture;
  22 import com.google.common.util.concurrent.FutureCallback;
  23 import com.google.common.util.concurrent.Futures;
  24 import com.google.common.util.concurrent.MoreExecutors;
  25 import java.util.Collection;
  26 import java.util.Collections;
  27 import java.util.HashMap;
  28 import java.util.List;
  29 import java.util.Locale;
  30 import java.util.Map;
  31 import java.util.Map.Entry;
  32 import java.util.Set;
  33 import java.util.concurrent.CountDownLatch;
  34 import java.util.concurrent.ExecutionException;
  35 import java.util.stream.Collectors;
  36 import javax.annotation.Nonnull;
  37 import javax.annotation.Nullable;
  38 import javax.annotation.concurrent.GuardedBy;
  39 import javax.annotation.concurrent.NotThreadSafe;
  40 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  41 import org.opendaylight.controller.md.sal.dom.api.DOMDataReadOnlyTransaction;
  42 import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
  43 import org.opendaylight.mdsal.common.api.CommitInfo;
  44 import org.opendaylight.protocol.bgp.rib.impl.ApplicationPeer.RegisterAppPeerListener;
  45 import org.opendaylight.protocol.bgp.rib.impl.spi.PeerTransactionChain;
  46 import org.opendaylight.protocol.bgp.rib.impl.spi.RIBSupportContext;
  47 import org.opendaylight.protocol.bgp.rib.impl.spi.RIBSupportContextRegistry;
  48 import org.opendaylight.protocol.bgp.rib.spi.IdentifierUtils;
  49 import org.opendaylight.protocol.bgp.rib.spi.PeerRoleUtil;
  50 import org.opendaylight.protocol.bgp.rib.spi.RibSupportUtils;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.SendReceive;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.MpReachNlri;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.MpUnreachNlri;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.PeerId;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.PeerRole;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.bgp.rib.rib.Peer;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.bgp.rib.rib.peer.SupportedTables;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.rib.TablesKey;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.rib.tables.Attributes;
  60 import org.opendaylight.yangtools.yang.common.QName;
  61 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  62 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.InstanceIdentifierBuilder;
  63 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  64 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
  65 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  66 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
  67 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  68 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
  69 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  70 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
  71 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
  72 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.DataContainerNodeAttrBuilder;
  73 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.DataContainerNodeBuilder;
  74 import org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableMapNodeBuilder;
  75 import org.slf4j.Logger;
  76 import org.slf4j.LoggerFactory;
  77
  78 /**
  79  * Writer of Adjacency-RIB-In for a single peer. An instance of this object
  80  * is attached to each {@link BGPPeer} and {@link ApplicationPeer}.
  81  */
  82 @NotThreadSafe
  83 final class AdjRibInWriter {
  84
  85     private static final Logger LOG = LoggerFactory.getLogger(AdjRibInWriter.class);
  86
  87     @VisibleForTesting
  88     static final LeafNode<Boolean> ATTRIBUTES_UPTODATE_FALSE = ImmutableNodes.leafNode(QName.create(Attributes.QNAME,
  89             "uptodate"), Boolean.FALSE);
  90     @VisibleForTesting
  91     static final QName PEER_ID_QNAME = QName.create(Peer.QNAME, "peer-id").intern();
  92     private static final LeafNode<Boolean> ATTRIBUTES_UPTODATE_TRUE =
  93             ImmutableNodes.leafNode(ATTRIBUTES_UPTODATE_FALSE.getNodeType(), Boolean.TRUE);
  94     private static final QName PEER_ROLE_QNAME = QName.create(Peer.QNAME, "peer-role").intern();
  95     private static final NodeIdentifier PEER_ID = NodeIdentifier.create(PEER_ID_QNAME);
  96     private static final NodeIdentifier PEER_ROLE = NodeIdentifier.create(PEER_ROLE_QNAME);
  97     private static final NodeIdentifier PEER_TABLES = NodeIdentifier.create(SupportedTables.QNAME);
  98     private static final QName SEND_RECEIVE = QName.create(SupportedTables.QNAME, "send-receive").intern();
  99
 100     // FIXME: is there a utility method to construct this?
 101     private static final MapNode EMPTY_TABLES = ImmutableNodes.mapNodeBuilder(TABLES).build();
 102     private static final ContainerNode EMPTY_ADJRIBIN = Builders.containerBuilder()
 103             .withNodeIdentifier(ADJRIBIN).addChild(EMPTY_TABLES).build();
 104     private static final ContainerNode EMPTY_EFFRIBIN = Builders.containerBuilder()
 105             .withNodeIdentifier(EFFRIBIN).addChild(EMPTY_TABLES).build();
 106     private static final ContainerNode EMPTY_ADJRIBOUT = Builders.containerBuilder()
 107             .withNodeIdentifier(ADJRIBOUT).addChild(EMPTY_TABLES).build();
 108
 109     private final Map<TablesKey, TableContext> tables;
 110     private final YangInstanceIdentifier ribPath;
 111     private final PeerTransactionChain chain;
 112     private final PeerRole role;
 113     @GuardedBy("this")
 114     private final Map<TablesKey, Collection<NodeIdentifierWithPredicates>> staleRoutesRegistry = new HashMap<>();
 115     @GuardedBy("this")
 116     private FluentFuture<? extends CommitInfo> submitted;
 117
 118     private AdjRibInWriter(final YangInstanceIdentifier ribPath, final PeerTransactionChain chain, final PeerRole role,
 119             final Map<TablesKey, TableContext> tables) {
 120         this.ribPath = requireNonNull(ribPath);
 121         this.chain = requireNonNull(chain);
 122         this.tables = requireNonNull(tables);
 123         this.role = requireNonNull(role);
 124     }
 125
 126     /**
 127      * Create a new writer using a transaction chain.
 128      *
 129      * @param role                peer's role
 130      * @param chain               transaction chain  @return A fresh writer instance
 131      */
 132     static AdjRibInWriter create(@Nonnull final YangInstanceIdentifier ribId, @Nonnull final PeerRole role,
 133             @Nonnull final PeerTransactionChain chain) {
 134         return new AdjRibInWriter(ribId, chain, role, Collections.emptyMap());
 135     }
 136
 137     /**
 138      * Transform this writer to a new writer, which is in charge of specified tables.
 139      * Empty tables are created for new entries and old tables are deleted. Once this
 140      * method returns, the old instance must not be reasonably used.
 141      *
 142      * @param newPeerId         new peer BGP identifier
 143      * @param peerPath          path of the peer in the datastore
 144      * @param registry          RIB extension registry
 145      * @param tableTypes        New tables, must not be null
 146      * @param addPathTablesType supported add path tables
 147      * @return New writer
 148      */
 149     AdjRibInWriter transform(final PeerId newPeerId, final YangInstanceIdentifier peerPath,
 150             final RIBSupportContextRegistry registry,
 151             final Set<TablesKey> tableTypes, final Map<TablesKey, SendReceive> addPathTablesType) {
 152         return transform(newPeerId, peerPath, registry, tableTypes, addPathTablesType, null);
 153     }
 154
 155     AdjRibInWriter transform(final PeerId newPeerId, final YangInstanceIdentifier peerPath,
 156             final RIBSupportContextRegistry registry, final Set<TablesKey> tableTypes,
 157             final Map<TablesKey, SendReceive> addPathTablesType,
 158             @Nullable final RegisterAppPeerListener registerAppPeerListener) {
 159         final DOMDataWriteTransaction tx = this.chain.getDomChain().newWriteOnlyTransaction();
 160
 161         createEmptyPeerStructure(newPeerId, peerPath, tx);
 162         final ImmutableMap<TablesKey, TableContext> tb = createNewTableInstances(peerPath, registry, tableTypes,
 163                 addPathTablesType, tx);
 164
 165         tx.commit().addCallback(new FutureCallback<CommitInfo>() {
 166             @Override
 167             public void onSuccess(final CommitInfo result) {
 168                 if (registerAppPeerListener != null) {
 169                     LOG.trace("Application Peer Listener registered");
 170                     registerAppPeerListener.register();
 171                 }
 172             }
 173
 174             @Override
 175             public void onFailure(final Throwable throwable) {
 176                 if (registerAppPeerListener != null) {
 177                     LOG.error("Failed to create Empty Structure, Application Peer Listener won't be registered",
 178                             throwable);
 179                 } else {
 180                     LOG.error("Failed to create Empty Structure", throwable);
 181                 }
 182             }
 183         }, MoreExecutors.directExecutor());
 184         return new AdjRibInWriter(this.ribPath, this.chain, this.role, tb);
 185     }
 186
 187     /**
 188      * Create new table instances, potentially creating their empty entries.
 189      */
 190     private static ImmutableMap<TablesKey, TableContext> createNewTableInstances(
 191             final YangInstanceIdentifier newPeerPath, final RIBSupportContextRegistry registry,
 192             final Set<TablesKey> tableTypes, final Map<TablesKey, SendReceive> addPathTablesType,
 193             final DOMDataWriteTransaction tx) {
 194
 195         final Builder<TablesKey, TableContext> tb = ImmutableMap.builder();
 196         for (final TablesKey tableKey : tableTypes) {
 197             final RIBSupportContext rs = registry.getRIBSupportContext(tableKey);
 198             // TODO: Use returned value once Instance Identifier builder allows for it.
 199             final NodeIdentifierWithPredicates instanceIdentifierKey = RibSupportUtils.toYangTablesKey(tableKey);
 200             if (rs == null) {
 201                 LOG.warn("No support for table type {}, skipping it", tableKey);
 202                 continue;
 203             }
 204             installAdjRibsOutTables(newPeerPath, rs, instanceIdentifierKey, tableKey,
 205                     addPathTablesType.get(tableKey), tx);
 206             installAdjRibInTables(newPeerPath, tableKey, rs, instanceIdentifierKey, tx, tb);
 207         }
 208         return tb.build();
 209     }
 210
 211     private static void installAdjRibInTables(final YangInstanceIdentifier newPeerPath, final TablesKey tableKey,
 212             final RIBSupportContext rs, final NodeIdentifierWithPredicates instanceIdentifierKey,
 213             final DOMDataWriteTransaction tx, final Builder<TablesKey, TableContext> tb) {
 214         // We will use table keys very often, make sure they are optimized
 215         final InstanceIdentifierBuilder idb = YangInstanceIdentifier.builder(newPeerPath
 216                 .node(EMPTY_ADJRIBIN.getIdentifier()).node(TABLES));
 217         idb.nodeWithKey(instanceIdentifierKey.getNodeType(), instanceIdentifierKey.getKeyValues());
 218
 219         final TableContext ctx = new TableContext(rs, idb.build());
 220         ctx.createEmptyTableStructure(tx);
 221
 222         tx.merge(LogicalDatastoreType.OPERATIONAL, ctx.getTableId().node(ATTRIBUTES)
 223                 .node(ATTRIBUTES_UPTODATE_FALSE.getNodeType()), ATTRIBUTES_UPTODATE_FALSE);
 224         LOG.debug("Created table instance {}", ctx.getTableId());
 225         tb.put(tableKey, ctx);
 226     }
 227
 228     private static void installAdjRibsOutTables(final YangInstanceIdentifier newPeerPath, final RIBSupportContext rs,
 229             final NodeIdentifierWithPredicates instanceIdentifierKey, final TablesKey tableKey,
 230             final SendReceive sendReceive, final DOMDataWriteTransaction tx) {
 231         final NodeIdentifierWithPredicates supTablesKey = RibSupportUtils.toYangKey(SupportedTables.QNAME, tableKey);
 232         final DataContainerNodeAttrBuilder<NodeIdentifierWithPredicates, MapEntryNode> tt =
 233                 Builders.mapEntryBuilder().withNodeIdentifier(supTablesKey);
 234         for (final Entry<QName, Object> e : supTablesKey.getKeyValues().entrySet()) {
 235             tt.withChild(ImmutableNodes.leafNode(e.getKey(), e.getValue()));
 236         }
 237         if (sendReceive != null) {
 238             tt.withChild(ImmutableNodes.leafNode(SEND_RECEIVE, sendReceive.toString().toLowerCase(Locale.ENGLISH)));
 239         }
 240         tx.put(LogicalDatastoreType.OPERATIONAL, newPeerPath.node(PEER_TABLES).node(supTablesKey), tt.build());
 241         rs.createEmptyTableStructure(tx, newPeerPath.node(EMPTY_ADJRIBOUT.getIdentifier())
 242                 .node(TABLES).node(instanceIdentifierKey));
 243     }
 244
 245     private void createEmptyPeerStructure(final PeerId newPeerId,
 246             final YangInstanceIdentifier peerPath, final DOMDataWriteTransaction tx) {
 247         final NodeIdentifierWithPredicates peerKey = IdentifierUtils.domPeerId(newPeerId);
 248
 249         tx.put(LogicalDatastoreType.OPERATIONAL, peerPath, peerSkeleton(peerKey, newPeerId.getValue()));
 250         LOG.debug("New peer {} structure installed.", peerPath);
 251     }
 252
 253     @VisibleForTesting
 254     MapEntryNode peerSkeleton(final NodeIdentifierWithPredicates peerKey, final String peerId) {
 255         final DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> pb = Builders.mapEntryBuilder();
 256         pb.withNodeIdentifier(peerKey);
 257         pb.withChild(ImmutableNodes.leafNode(PEER_ID, peerId));
 258         pb.withChild(ImmutableNodes.leafNode(PEER_ROLE, PeerRoleUtil.roleForString(this.role)));
 259         pb.withChild(ImmutableMapNodeBuilder.create().withNodeIdentifier(PEER_TABLES).build());
 260         pb.withChild(EMPTY_ADJRIBIN);
 261         pb.withChild(EMPTY_EFFRIBIN);
 262         pb.withChild(EMPTY_ADJRIBOUT);
 263         return pb.build();
 264     }
 265
 266     void markTableUptodate(final TablesKey tableTypes) {
 267         final DOMDataWriteTransaction tx = this.chain.getDomChain().newWriteOnlyTransaction();
 268         final TableContext ctx = this.tables.get(tableTypes);
 269         tx.merge(LogicalDatastoreType.OPERATIONAL, ctx.getTableId().node(ATTRIBUTES)
 270                 .node(ATTRIBUTES_UPTODATE_TRUE.getNodeType()), ATTRIBUTES_UPTODATE_TRUE);
 271         tx.commit().addCallback(new FutureCallback<CommitInfo>() {
 272             @Override
 273             public void onSuccess(final CommitInfo result) {
 274                 LOG.trace("Write Attributes uptodate, succeed");
 275             }
 276
 277             @Override
 278             public void onFailure(final Throwable throwable) {
 279                 LOG.error("Write Attributes uptodate failed", throwable);
 280             }
 281         }, MoreExecutors.directExecutor());
 282     }
 283
 284     void updateRoutes(final MpReachNlri nlri, final org.opendaylight.yang.gen.v1.urn.opendaylight.params
 285             .xml.ns.yang.bgp.message.rev180329.path.attributes.Attributes attributes) {
 286         final TablesKey key = new TablesKey(nlri.getAfi(), nlri.getSafi());
 287         final TableContext ctx = this.tables.get(key);
 288         if (ctx == null) {
 289             LOG.debug("No table for {}, not accepting NLRI {}", key, nlri);
 290             return;
 291         }
 292
 293         final DOMDataWriteTransaction tx = this.chain.getDomChain().newWriteOnlyTransaction();
 294         final Collection<NodeIdentifierWithPredicates> routeKeys = ctx.writeRoutes(tx, nlri, attributes);
 295         final Collection<NodeIdentifierWithPredicates> staleRoutes = this.staleRoutesRegistry.get(key);
 296         if (staleRoutes != null) {
 297             staleRoutes.removeAll(routeKeys);
 298         }
 299         LOG.trace("Write routes {}", nlri);
 300         final FluentFuture<? extends CommitInfo> future = tx.commit();
 301         this.submitted = future;
 302         future.addCallback(new FutureCallback<CommitInfo>() {
 303             @Override
 304             public void onSuccess(final CommitInfo result) {
 305                 LOG.trace("Write routes {}, succeed", nlri);
 306             }
 307
 308             @Override
 309             public void onFailure(final Throwable throwable) {
 310                 LOG.error("Write routes failed", throwable);
 311             }
 312         }, MoreExecutors.directExecutor());
 313     }
 314
 315     void removeRoutes(final MpUnreachNlri nlri) {
 316         final TablesKey key = new TablesKey(nlri.getAfi(), nlri.getSafi());
 317         final TableContext ctx = this.tables.get(key);
 318         if (ctx == null) {
 319             LOG.debug("No table for {}, not accepting NLRI {}", key, nlri);
 320             return;
 321         }
 322         LOG.trace("Removing routes {}", nlri);
 323         final DOMDataWriteTransaction tx = this.chain.getDomChain().newWriteOnlyTransaction();
 324         ctx.removeRoutes(tx, nlri);
 325         final FluentFuture<? extends CommitInfo> future = tx.commit();
 326         this.submitted = future;
 327         future.addCallback(new FutureCallback<CommitInfo>() {
 328             @Override
 329             public void onSuccess(final CommitInfo result) {
 330                 LOG.trace("Removing routes {}, succeed", nlri);
 331             }
 332
 333             @Override
 334             public void onFailure(final Throwable throwable) {
 335                 LOG.error("Removing routes failed", throwable);
 336             }
 337         }, MoreExecutors.directExecutor());
 338     }
 339
 340     void releaseChain() {
 341         if (this.submitted != null) {
 342             try {
 343                 this.submitted.get();
 344             } catch (final InterruptedException | ExecutionException throwable) {
 345                 LOG.error("Write routes failed", throwable);
 346             }
 347         }
 348     }
 349
 350     void storeStaleRoutes(final Set<TablesKey> gracefulTables) {
 351         final CountDownLatch latch = new CountDownLatch(gracefulTables.size());
 352
 353         try (DOMDataReadOnlyTransaction tx = this.chain.getDomChain().newReadOnlyTransaction()) {
 354             for (TablesKey tablesKey : gracefulTables) {
 355                 final TableContext ctx = this.tables.get(tablesKey);
 356                 if (ctx == null) {
 357                     LOG.warn("Missing table for address family {}", tablesKey);
 358                     latch.countDown();
 359                     continue;
 360                 }
 361
 362                 Futures.addCallback(tx.read(LogicalDatastoreType.OPERATIONAL, ctx.routesPath()),
 363                     new FutureCallback<Optional<NormalizedNode<?, ?>>>() {
 364                         @Override
 365                         public void onSuccess(final Optional<NormalizedNode<?, ?>> routesOptional) {
 366                             try {
 367                                 if (routesOptional.isPresent()) {
 368                                     synchronized (AdjRibInWriter.this.staleRoutesRegistry) {
 369                                         final MapNode routesNode = (MapNode) routesOptional.get();
 370                                         final List<NodeIdentifierWithPredicates> routes = routesNode.getValue().stream()
 371                                                 .map(MapEntryNode::getIdentifier)
 372                                                 .collect(Collectors.toList());
 373                                         if (!routes.isEmpty()) {
 374                                             AdjRibInWriter.this.staleRoutesRegistry.put(tablesKey, routes);
 375                                         }
 376                                     }
 377                                 }
 378                             } finally {
 379                                 latch.countDown();
 380                             }
 381                         }
 382
 383                         @Override
 384                         public void onFailure(final Throwable throwable) {
 385                             LOG.warn("Failed to store stale routes for table {}", tablesKey, throwable);
 386                             latch.countDown();
 387                         }
 388                     }, MoreExecutors.directExecutor());
 389             }
 390         }
 391
 392         try {
 393             latch.await();
 394         } catch (InterruptedException e) {
 395             LOG.warn("Interrupted while waiting to store stale routes with {} tasks of {} to finish", latch.getCount(),
 396                 gracefulTables, e);
 397         }
 398     }
 399
 400     void removeStaleRoutes(final TablesKey tableKey) {
 401         final TableContext ctx = this.tables.get(tableKey);
 402         if (ctx == null) {
 403             LOG.debug("No table for {}, not removing any stale routes", tableKey);
 404             return;
 405         }
 406         final Collection<NodeIdentifierWithPredicates> routeKeys = this.staleRoutesRegistry.get(tableKey);
 407         if (routeKeys == null || routeKeys.isEmpty()) {
 408             LOG.debug("No stale routes present in table {}", tableKey);
 409             return;
 410         }
 411         LOG.trace("Removing routes {}", routeKeys);
 412         final DOMDataWriteTransaction tx = this.chain.getDomChain().newWriteOnlyTransaction();
 413         routeKeys.forEach(routeKey -> {
 414             tx.delete(LogicalDatastoreType.OPERATIONAL, ctx.routePath(routeKey));
 415         });
 416         final FluentFuture<? extends CommitInfo> future = tx.commit();
 417         this.submitted = future;
 418         future.addCallback(new FutureCallback<CommitInfo>() {
 419             @Override
 420             public void onSuccess(final CommitInfo result) {
 421                 LOG.trace("Removing routes {}, succeed", routeKeys);
 422                 synchronized (AdjRibInWriter.this.staleRoutesRegistry) {
 423                     staleRoutesRegistry.remove(tableKey);
 424                 }
 425             }
 426
 427             @Override
 428             public void onFailure(final Throwable throwable) {
 429                 LOG.warn("Removing routes {}, failed", routeKeys, throwable);
 430             }
 431         }, MoreExecutors.directExecutor());
 432     }
 433
 434     FluentFuture<? extends CommitInfo> clearTables(final Set<TablesKey> tablesToClear) {
 435         if (tablesToClear == null || tablesToClear.isEmpty()) {
 436             return CommitInfo.emptyFluentFuture();
 437         }
 438
 439         final DOMDataWriteTransaction wtx = this.chain.getDomChain().newWriteOnlyTransaction();
 440         tablesToClear.forEach(tableKey -> {
 441             final TableContext ctx = this.tables.get(tableKey);
 442             wtx.delete(LogicalDatastoreType.OPERATIONAL, ctx.routesPath().getParent());
 443         });
 444         return wtx.commit();
 445     }
 446 }