bgp/rib-impl/src/main/java/org/opendaylight/protocol/bgp/rib/impl/ExportPolicyPeerTrackerImpl.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.function.Function.identity;
  11 import static java.util.stream.Collectors.toMap;
  12
  13 import com.google.common.base.Optional;
  14 import com.google.common.base.Preconditions;
  15 import com.google.common.collect.ImmutableMap;
  16 import com.google.common.collect.Sets;
  17 import java.util.Collections;
  18 import java.util.EnumMap;
  19 import java.util.HashMap;
  20 import java.util.Map;
  21 import java.util.Set;
  22 import java.util.stream.Collectors;
  23 import javax.annotation.Nonnull;
  24 import javax.annotation.Nullable;
  25 import org.opendaylight.protocol.bgp.rib.spi.ExportPolicyPeerTracker;
  26 import org.opendaylight.protocol.bgp.rib.spi.IdentifierUtils;
  27 import org.opendaylight.protocol.bgp.rib.spi.PeerExportGroup;
  28 import org.opendaylight.protocol.bgp.rib.spi.PeerExportGroup.PeerExporTuple;
  29 import org.opendaylight.protocol.bgp.rib.spi.RibSupportUtils;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.SendReceive;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerId;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerRole;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.peer.SupportedTables;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.TablesKey;
  35 import org.opendaylight.yangtools.yang.binding.BindingMapping;
  36 import org.opendaylight.yangtools.yang.common.QName;
  37 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  38 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  39 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
  40 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  41 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
  42 import org.opendaylight.yangtools.yang.data.api.schema.tree.ModificationType;
  43 import org.slf4j.Logger;
  44 import org.slf4j.LoggerFactory;
  45
  46 final class ExportPolicyPeerTrackerImpl implements ExportPolicyPeerTracker {
  47     private static final Logger LOG = LoggerFactory.getLogger(ExportPolicyPeerTrackerImpl.class);
  48     private static final QName SEND_RECEIVE = QName.create(SupportedTables.QNAME, "send-receive").intern();
  49     private static final NodeIdentifier SEND_RECEIVE_NID = new NodeIdentifier(SEND_RECEIVE);
  50     private final Map<YangInstanceIdentifier, PeerRole> peerRoles = new HashMap<>();
  51     private final Set<PeerId> peerTables = Sets.newHashSet();
  52     private final PolicyDatabase policyDatabase;
  53     private final Map<PeerId, SendReceive> peerAddPathTables = new HashMap<>();
  54     private final TablesKey localTableKey;
  55     private volatile Map<PeerRole, PeerExportGroup> groups = Collections.emptyMap();
  56
  57     ExportPolicyPeerTrackerImpl(final PolicyDatabase policyDatabase, final TablesKey localTablesKey) {
  58         this.policyDatabase = Preconditions.checkNotNull(policyDatabase);
  59         this.localTableKey = localTablesKey;
  60     }
  61
  62     private Map<PeerRole, PeerExportGroup> createGroups(final Map<YangInstanceIdentifier, PeerRole> peerPathRoles) {
  63         if (peerPathRoles.isEmpty()) {
  64             return Collections.emptyMap();
  65         }
  66
  67         final Map<PeerId, PeerExporTuple> immutablePeers = ImmutableMap.copyOf(peerPathRoles.entrySet().stream()
  68             .collect(toMap(peer -> IdentifierUtils.peerKeyToPeerId(peer.getKey()), peer -> new PeerExporTuple(peer.getKey(), peer.getValue()))));
  69
  70         final Map<PeerRole, PeerExportGroup> ret = peerPathRoles.values().stream().collect(Collectors.toSet()).stream().filter(role -> role != PeerRole.Internal)
  71             .collect(toMap(identity(), role -> new PeerExportGroupImpl(immutablePeers, this.policyDatabase.exportPolicyForRole(role)),
  72                 (oldKey, newKey) -> oldKey, () -> new EnumMap<>(PeerRole.class)));
  73
  74         return ret;
  75     }
  76
  77     @Override
  78     public void peerRoleChanged(@Nonnull final YangInstanceIdentifier peerPath, @Nullable final PeerRole role) {
  79         /*
  80          * This is a sledgehammer approach to the problem: modify the role map first,
  81          * then construct the group map from scratch.
  82          */
  83         final PeerRole oldRole;
  84         if (role != null) {
  85             oldRole = this.peerRoles.put(peerPath, role);
  86         } else {
  87             oldRole = this.peerRoles.remove(peerPath);
  88         }
  89
  90         if (role != oldRole) {
  91             LOG.debug("Peer {} changed role from {} to {}", peerPath, oldRole, role);
  92             this.groups = createGroups(this.peerRoles);
  93         }
  94     }
  95
  96     @Override
  97     public void onTablesChanged(final PeerId peerId, final DataTreeCandidateNode tablesChange) {
  98         final NodeIdentifierWithPredicates supTablesKey = RibSupportUtils.toYangKey(SupportedTables.QNAME, this.localTableKey);
  99         final DataTreeCandidateNode localTableNode = tablesChange.getModifiedChild(supTablesKey);
 100         if (localTableNode != null) {
 101             final Optional<NormalizedNode<?, ?>> dataAfter = localTableNode.getDataAfter();
 102             processSupportedSendReceiveTables(localTableNode.getModifiedChild(SEND_RECEIVE_NID), peerId);
 103             if (dataAfter.isPresent()) {
 104                 final boolean added = this.peerTables.add(peerId);
 105                 if (added) {
 106                     LOG.debug("Supported table {} added to peer {}", this.localTableKey, peerId);
 107                 }
 108             } else {
 109                 final NodeIdentifierWithPredicates value = (NodeIdentifierWithPredicates) localTableNode.getIdentifier();
 110                 this.peerTables.remove(peerId);
 111                 LOG.debug("Removed tables {} from peer {}", value, peerId);
 112             }
 113         }
 114     }
 115
 116     @Override
 117     public PeerExportGroup getPeerGroup(final PeerRole role) {
 118         return this.groups.get(Preconditions.checkNotNull(role));
 119     }
 120
 121     @Override
 122     public PeerRole getRole(final YangInstanceIdentifier peerId) {
 123         return this.peerRoles.get(peerId);
 124     }
 125
 126     private void processSupportedSendReceiveTables(final DataTreeCandidateNode sendReceiveModChild, final PeerId peerId) {
 127         if (sendReceiveModChild != null) {
 128             if (sendReceiveModChild.getModificationType().equals(ModificationType.DELETE)) {
 129                 final Optional<NormalizedNode<?, ?>> sendReceiveNode = sendReceiveModChild.getDataBefore();
 130                 if (sendReceiveNode.isPresent()) {
 131                     final SendReceive sendReceiveValue = SendReceive.valueOf(BindingMapping.getClassName((String) sendReceiveNode.get().getValue()));
 132                     this.peerAddPathTables.remove(peerId);
 133                     LOG.debug("Supported Add BestPath table {} removed to peer {}", sendReceiveValue, peerId);
 134                 }
 135             } else {
 136                 final Optional<NormalizedNode<?, ?>> sendReceiveNode = sendReceiveModChild.getDataAfter();
 137                 if (sendReceiveNode.isPresent()) {
 138                     final SendReceive sendReceiveValue = SendReceive.valueOf(BindingMapping.getClassName((String) sendReceiveNode.get().getValue()));
 139                     this.peerAddPathTables.put(peerId, sendReceiveValue);
 140                     LOG.debug("Supported Add BestPath table {} added to peer {}", sendReceiveValue, peerId);
 141                 }
 142             }
 143         }
 144     }
 145
 146     @Override
 147     public boolean isTableSupported(final PeerId peerId) {
 148         return this.peerTables.contains(peerId);
 149     }
 150
 151     @Override
 152     public boolean isAddPathSupportedByPeer(final PeerId peerId) {
 153         final SendReceive sendReceive = this.peerAddPathTables.get(peerId);
 154         return sendReceive != null && (sendReceive.equals(SendReceive.Both) || sendReceive.equals(SendReceive.Receive));
 155     }
 156 }