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

   1 /*
   2  * Copyright (c) 2014 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 com.google.common.base.Preconditions;
  11 import com.google.common.base.Verify;
  12 import com.google.common.net.InetAddresses;
  13 import java.util.Arrays;
  14 import java.util.Collection;
  15 import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;
  16 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  17 import org.opendaylight.controller.md.sal.common.api.data.TransactionChain;
  18 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
  19 import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeChangeListener;
  20 import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
  21 import org.opendaylight.controller.md.sal.dom.api.DOMTransactionChain;
  22 import org.opendaylight.protocol.bgp.openconfig.spi.BGPConfigModuleTracker;
  23 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Address;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.ApplicationRibId;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerRole;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.Peer;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.peer.AdjRibIn;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.Tables;
  29 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  30 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
  31 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  32 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  33 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
  34 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
  35 import org.slf4j.Logger;
  36 import org.slf4j.LoggerFactory;
  37
  38 /**
  39  * Application Peer is a special case of BGP peer. It serves as an interface
  40  * for user to advertise user routes to ODL and through ODL to other BGP peers.
  41  *
  42  * This peer has it's own RIB, where it stores all user routes. This RIB is
  43  * located in configurational datastore. Routes are added through RESTCONF.
  44  *
  45  * They are then processed as routes from any other peer, through AdjRib,
  46  * EffectiveRib,LocRib and if they are advertised further, through AdjRibOut.
  47  *
  48  * For purposed of import policies such as Best Path Selection, application
  49  * peer needs to have a BGP-ID that is configurable.
  50  */
  51 public class ApplicationPeer implements AutoCloseable, org.opendaylight.protocol.bgp.rib.spi.Peer, DOMDataTreeChangeListener, TransactionChainListener {
  52
  53     private static final Logger LOG = LoggerFactory.getLogger(ApplicationPeer.class);
  54
  55     private final byte[] rawIdentifier;
  56     private final RIBImpl targetRib;
  57     private final String name;
  58     private final YangInstanceIdentifier adjRibsInId;
  59     private final DOMTransactionChain chain;
  60     private final DOMTransactionChain writerChain;
  61     private final BGPConfigModuleTracker moduleTracker;
  62
  63     private AdjRibInWriter writer;
  64
  65     public ApplicationPeer(final ApplicationRibId applicationRibId, final Ipv4Address ipAddress, final RIBImpl targetRib, final BGPConfigModuleTracker moduleTracker) {
  66         this.name = applicationRibId.getValue().toString();
  67         this.targetRib = Preconditions.checkNotNull(targetRib);
  68         this.rawIdentifier = InetAddresses.forString(ipAddress.getValue()).getAddress();
  69         final NodeIdentifierWithPredicates peerId = IdentifierUtils.domPeerId(RouterIds.createPeerId(ipAddress));
  70         this.adjRibsInId = this.targetRib.getYangRibId().node(Peer.QNAME).node(peerId).node(AdjRibIn.QNAME).node(Tables.QNAME);
  71         this.chain = this.targetRib.createPeerChain(this);
  72         this.writerChain = this.targetRib.createPeerChain(this);
  73         this.writer = AdjRibInWriter.create(this.targetRib.getYangRibId(), PeerRole.Internal, this.writerChain);
  74         // FIXME: set to true, once it's fixed how to skip advertising routes back to AppPeer
  75         this.writer = this.writer.transform(RouterIds.createPeerId(ipAddress), this.targetRib.getRibSupportContext(), this.targetRib.getLocalTablesKeys(), false);
  76         this.moduleTracker = moduleTracker;
  77         if (moduleTracker != null) {
  78             moduleTracker.onInstanceCreate();
  79         }
  80     }
  81
  82     public ApplicationPeer(final ApplicationRibId applicationRibId, final Ipv4Address bgpPeerId, final RIBImpl targetRibDependency) {
  83         this(applicationRibId, bgpPeerId, targetRibDependency, null);
  84     }
  85
  86     /**
  87      * Routes come from application RIB that is identified by (configurable) name.
  88      * Each route is pushed into AdjRibsInWriter with it's whole context. In this
  89      * method, it doesn't matter if the routes are removed or added, this will
  90      * be determined in LocRib.
  91      */
  92     @Override
  93     public void onDataTreeChanged(final Collection<DataTreeCandidate> changes) {
  94         final DOMDataWriteTransaction tx = this.chain.newWriteOnlyTransaction();
  95         LOG.debug("Received data change to ApplicationRib {}", changes);
  96         for (final DataTreeCandidate tc : changes) {
  97             LOG.debug("Modification Type {}", tc.getRootNode().getModificationType());
  98             final YangInstanceIdentifier path = tc.getRootPath();
  99             final PathArgument lastArg = path.getLastPathArgument();
 100             Verify.verify(lastArg instanceof NodeIdentifierWithPredicates, "Unexpected type %s in path %s", lastArg.getClass(), path);
 101             final NodeIdentifierWithPredicates tableKey = (NodeIdentifierWithPredicates) lastArg;
 102             for (final DataTreeCandidateNode child : tc.getRootNode().getChildNodes()) {
 103                 final PathArgument childIdentifier = child.getIdentifier();
 104                 final YangInstanceIdentifier tableId = this.adjRibsInId.node(tableKey).node(childIdentifier);
 105                 switch (child.getModificationType()) {
 106                 case DELETE:
 107                     LOG.trace("App peer -> AdjRibsIn path delete: {}", childIdentifier);
 108                     tx.delete(LogicalDatastoreType.OPERATIONAL, tableId);
 109                     break;
 110                 case UNMODIFIED:
 111                     // No-op
 112                     break;
 113                 case SUBTREE_MODIFIED:
 114                     if (EffectiveRibInWriter.TABLE_ROUTES.equals(childIdentifier)) {
 115                         processRoutesTable(child, tableId, tx, tableId);
 116                         break;
 117                     }
 118                 case WRITE:
 119                     if (child.getDataAfter().isPresent()) {
 120                         final NormalizedNode<?,?> dataAfter = child.getDataAfter().get();
 121                         LOG.trace("App peer -> AdjRibsIn path : {}", tableId);
 122                         LOG.trace("App peer -> AdjRibsIn data : {}", dataAfter);
 123                         tx.put(LogicalDatastoreType.OPERATIONAL, tableId, dataAfter);
 124                     }
 125                     break;
 126                 default:
 127                     break;
 128                 }
 129             }
 130         }
 131         tx.submit();
 132     }
 133
 134     /**
 135      * Applies modification under table routes based on modification type instead of only put. BUG 4438
 136      * @param node
 137      * @param identifier
 138      * @param tx
 139      * @param routeTableIdentifier
 140      */
 141     private void processRoutesTable(final DataTreeCandidateNode node, final YangInstanceIdentifier identifier,
 142         final DOMDataWriteTransaction tx, final YangInstanceIdentifier routeTableIdentifier) {
 143         for (final DataTreeCandidateNode child : node.getChildNodes()) {
 144             final YangInstanceIdentifier childIdentifier = identifier.node(child.getIdentifier());
 145             switch (child.getModificationType()) {
 146             case DELETE:
 147                 LOG.trace("App peer -> AdjRibsIn path delete: {}", childIdentifier);
 148                 tx.delete(LogicalDatastoreType.OPERATIONAL, childIdentifier);
 149                 break;
 150             case UNMODIFIED:
 151                 // No-op
 152                 break;
 153             case SUBTREE_MODIFIED:
 154                 //For be ables to use DELETE when we remove specific routes as we do when we remove the whole routes,
 155                 // we need to go deeper three levels
 156                 if (!routeTableIdentifier.equals(childIdentifier.getParent().getParent().getParent())) {
 157                     processRoutesTable(child, childIdentifier, tx, routeTableIdentifier);
 158                     break;
 159                 }
 160             case WRITE:
 161                 if (child.getDataAfter().isPresent()) {
 162                     final NormalizedNode<?,?> dataAfter = child.getDataAfter().get();
 163                     LOG.trace("App peer -> AdjRibsIn path : {}", childIdentifier);
 164                     LOG.trace("App peer -> AdjRibsIn data : {}", dataAfter);
 165                     tx.put(LogicalDatastoreType.OPERATIONAL, childIdentifier, dataAfter);
 166                 }
 167                 break;
 168             default:
 169                 break;
 170             }
 171         }
 172     }
 173
 174     @Override
 175     public String getName() {
 176         return this.name;
 177     }
 178
 179     @Override
 180     public void close() {
 181         this.writer.cleanTables(this.targetRib.getLocalTablesKeys());
 182         this.chain.close();
 183         this.writerChain.close();
 184         if (this.moduleTracker != null) {
 185             this.moduleTracker.onInstanceClose();
 186         }
 187     }
 188
 189     @Override
 190     public byte[] getRawIdentifier() {
 191         return Arrays.copyOf(this.rawIdentifier, this.rawIdentifier.length);
 192     }
 193
 194     @Override
 195     public void onTransactionChainFailed(final TransactionChain<?, ?> chain, final AsyncTransaction<?, ?> transaction,
 196         final Throwable cause) {
 197         LOG.error("Transaction chain failed.", cause);
 198     }
 199
 200     @Override
 201     public void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
 202         LOG.debug("Transaction chain {} successfull.", chain);
 203     }
 204 }