2 * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
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
8 package org.opendaylight.protocol.bgp.rib.impl;
10 import com.google.common.base.Function;
11 import com.google.common.base.Optional;
12 import com.google.common.base.Preconditions;
13 import com.google.common.collect.ArrayListMultimap;
14 import com.google.common.collect.Collections2;
15 import com.google.common.collect.ImmutableList;
16 import com.google.common.collect.ImmutableMap;
17 import com.google.common.collect.Multimap;
18 import com.google.common.collect.Sets;
19 import java.util.AbstractMap;
20 import java.util.Collection;
21 import java.util.Collections;
22 import java.util.EnumMap;
23 import java.util.HashMap;
25 import java.util.Map.Entry;
27 import javax.annotation.Nonnull;
28 import javax.annotation.Nullable;
29 import org.opendaylight.protocol.bgp.rib.spi.ExportPolicyPeerTracker;
30 import org.opendaylight.protocol.bgp.rib.spi.IdentifierUtils;
31 import org.opendaylight.protocol.bgp.rib.spi.PeerExportGroup;
32 import org.opendaylight.protocol.bgp.rib.spi.RibSupportUtils;
33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.SendReceive;
34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerId;
35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerRole;
36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.peer.SupportedTables;
37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.TablesKey;
38 import org.opendaylight.yangtools.yang.binding.BindingMapping;
39 import org.opendaylight.yangtools.yang.common.QName;
40 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
41 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
42 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
43 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
44 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
45 import org.opendaylight.yangtools.yang.data.api.schema.tree.ModificationType;
46 import org.slf4j.Logger;
47 import org.slf4j.LoggerFactory;
49 final class ExportPolicyPeerTrackerImpl implements ExportPolicyPeerTracker {
50 private static final Logger LOG = LoggerFactory.getLogger(ExportPolicyPeerTrackerImpl.class);
51 private static final Function<YangInstanceIdentifier, Entry<PeerId, YangInstanceIdentifier>> GENERATE_PEER_ID = new Function<YangInstanceIdentifier, Entry<PeerId, YangInstanceIdentifier>>() {
53 public Entry<PeerId, YangInstanceIdentifier> apply(final YangInstanceIdentifier input) {
54 final PeerId peerId = IdentifierUtils.peerId((NodeIdentifierWithPredicates) input.getLastPathArgument());
55 return new AbstractMap.SimpleImmutableEntry<>(peerId, input);
58 private static final QName SEND_RECEIVE = QName.create(SupportedTables.QNAME, "send-receive").intern();
59 private static final NodeIdentifier SEND_RECEIVE_NID = new NodeIdentifier(SEND_RECEIVE);
60 private final Map<YangInstanceIdentifier, PeerRole> peerRoles = new HashMap<>();
61 private final Set<PeerId> peerTables = Sets.newHashSet();
62 private final PolicyDatabase policyDatabase;
63 private final Map<PeerId, SendReceive> peerAddPathTables = new HashMap<>();
64 private final TablesKey localTableKey;
65 private volatile Map<PeerRole, PeerExportGroup> groups = Collections.emptyMap();
67 ExportPolicyPeerTrackerImpl(final PolicyDatabase policyDatabase, final TablesKey localTablesKey) {
68 this.policyDatabase = Preconditions.checkNotNull(policyDatabase);
69 this.localTableKey = localTablesKey;
72 private Map<PeerRole, PeerExportGroup> createGroups(final Map<YangInstanceIdentifier, PeerRole> peerPathRoles) {
73 if (peerPathRoles.isEmpty()) {
74 return Collections.emptyMap();
77 // Index things nicely for easy access
78 final Multimap<PeerRole, YangInstanceIdentifier> roleToIds = ArrayListMultimap.create(PeerRole.values().length, 2);
79 final Map<PeerId, PeerRole> idToRole = new HashMap<>();
80 for (final Entry<YangInstanceIdentifier, PeerRole> e : peerPathRoles.entrySet()) {
81 roleToIds.put(e.getValue(), e.getKey());
82 idToRole.put(IdentifierUtils.peerId((NodeIdentifierWithPredicates) e.getKey().getLastPathArgument()), e.getValue());
85 // Optimized immutable copy, reused for all PeerGroups
86 final Map<PeerId, PeerRole> allPeerRoles = ImmutableMap.copyOf(idToRole);
88 final Map<PeerRole, PeerExportGroup> ret = new EnumMap<>(PeerRole.class);
89 for (final Entry<PeerRole, Collection<YangInstanceIdentifier>> e : roleToIds.asMap().entrySet()) {
90 final AbstractExportPolicy policy = this.policyDatabase.exportPolicyForRole(e.getKey());
91 final Collection<Entry<PeerId, YangInstanceIdentifier>> peers = ImmutableList.copyOf(Collections2.transform(e.getValue(), GENERATE_PEER_ID));
93 ret.put(e.getKey(), new PeerExportGroupImpl(peers, allPeerRoles, policy));
100 public void peerRoleChanged(@Nonnull final YangInstanceIdentifier peerPath, @Nullable final PeerRole role) {
102 * This is a sledgehammer approach to the problem: modify the role map first,
103 * then construct the group map from scratch.
105 final PeerRole oldRole;
107 oldRole = this.peerRoles.put(peerPath, role);
109 oldRole = this.peerRoles.remove(peerPath);
112 if (role != oldRole) {
113 LOG.debug("Peer {} changed role from {} to {}", peerPath, oldRole, role);
114 this.groups = createGroups(this.peerRoles);
119 public void onTablesChanged(final PeerId peerId, final DataTreeCandidateNode tablesChange) {
120 final NodeIdentifierWithPredicates supTablesKey = RibSupportUtils.toYangKey(SupportedTables.QNAME, this.localTableKey);
121 final DataTreeCandidateNode localTableNode = tablesChange.getModifiedChild(supTablesKey);
122 if (localTableNode != null) {
123 final Optional<NormalizedNode<?, ?>> dataAfter = localTableNode.getDataAfter();
124 processSupportedSendReceiveTables(localTableNode.getModifiedChild(SEND_RECEIVE_NID), peerId);
125 if (dataAfter.isPresent()) {
126 final boolean added = this.peerTables.add(peerId);
128 LOG.debug("Supported table {} added to peer {}", this.localTableKey, peerId);
131 final NodeIdentifierWithPredicates value = (NodeIdentifierWithPredicates) localTableNode.getIdentifier();
132 this.peerTables.remove(peerId);
133 LOG.debug("Removed tables {} from peer {}", value, peerId);
139 public PeerExportGroup getPeerGroup(final PeerRole role) {
140 return this.groups.get(Preconditions.checkNotNull(role));
144 public PeerRole getRole(final YangInstanceIdentifier peerId) {
145 return this.peerRoles.get(peerId);
148 private void processSupportedSendReceiveTables(final DataTreeCandidateNode sendReceiveModChild, final PeerId peerId) {
149 if (sendReceiveModChild != null) {
150 if (sendReceiveModChild.getModificationType().equals(ModificationType.DELETE)) {
151 final Optional<NormalizedNode<?, ?>> sendReceiveNode = sendReceiveModChild.getDataBefore();
152 if (sendReceiveNode.isPresent()) {
153 final SendReceive sendReceiveValue = SendReceive.valueOf(BindingMapping.getClassName((String) sendReceiveNode.get().getValue()));
154 this.peerAddPathTables.remove(peerId);
155 LOG.debug("Supported Add BestPath table {} removed to peer {}", sendReceiveValue, peerId);
158 final Optional<NormalizedNode<?, ?>> sendReceiveNode = sendReceiveModChild.getDataAfter();
159 if (sendReceiveNode.isPresent()) {
160 final SendReceive sendReceiveValue = SendReceive.valueOf(BindingMapping.getClassName((String) sendReceiveNode.get().getValue()));
161 this.peerAddPathTables.put(peerId, sendReceiveValue);
162 LOG.debug("Supported Add BestPath table {} added to peer {}", sendReceiveValue, peerId);
169 public boolean isTableSupported(final PeerId peerId) {
170 return this.peerTables.contains(peerId);
174 public boolean isAddPathSupportedByPeer(final PeerId peerId) {
175 final SendReceive sendReceive = this.peerAddPathTables.get(peerId);
176 return sendReceive != null && (sendReceive.equals(SendReceive.Both) || sendReceive.equals(SendReceive.Receive));