bgp/topology-provider/src/main/java/org/opendaylight/bgpcep/bgp/topology/provider/AbstractReachabilityTopologyBuilder.java

   1 /*
   2  * Copyright (c) 2013 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.bgpcep.bgp.topology.provider;
   9
  10 import java.util.ArrayList;
  11
  12 import org.opendaylight.controller.md.sal.common.api.data.DataModification;
  13 import org.opendaylight.controller.sal.binding.api.data.DataProviderService;
  14 import org.opendaylight.protocol.bgp.rib.LocRibReference;
  15 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpPrefix;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.Route;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.route.Attributes;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.next.hop.CNextHop;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.next.hop.c.next.hop.Ipv4NextHopCase;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.next.hop.c.next.hop.Ipv6NextHopCase;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.next.hop.c.next.hop.ipv4.next.hop._case.Ipv4NextHop;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.next.hop.c.next.hop.ipv6.next.hop._case.Ipv6NextHop;
  23 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
  24 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
  25 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  26 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
  27 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.TopologyTypesBuilder;
  28 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.Node1;
  29 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.Node1Builder;
  30 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.node.attributes.IgpNodeAttributesBuilder;
  31 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.node.attributes.igp.node.attributes.Prefix;
  32 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.node.attributes.igp.node.attributes.PrefixBuilder;
  33 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.node.attributes.igp.node.attributes.PrefixKey;
  34 import org.opendaylight.yangtools.yang.binding.DataObject;
  35 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  36 import org.slf4j.Logger;
  37 import org.slf4j.LoggerFactory;
  38
  39 /**
  40  *
  41  */
  42 abstract class AbstractReachabilityTopologyBuilder<T extends Route> extends AbstractTopologyBuilder<T> {
  43         private static final Logger LOG = LoggerFactory.getLogger(AbstractReachabilityTopologyBuilder.class);
  44
  45         protected AbstractReachabilityTopologyBuilder(final DataProviderService dataProvider, final LocRibReference locRibReference, final TopologyId topologyId,
  46                         final Class<T> idClass) {
  47                 super(dataProvider, locRibReference, topologyId, new TopologyTypesBuilder().build(), idClass);
  48         }
  49
  50         private NodeId advertizingNode(final Attributes attrs) {
  51                 final CNextHop nh = attrs.getCNextHop();
  52                 if (nh instanceof Ipv4NextHopCase) {
  53                         final Ipv4NextHop ipv4 = ((Ipv4NextHopCase) nh).getIpv4NextHop();
  54
  55                         return new NodeId(ipv4.getGlobal().getValue());
  56                 } else if (nh instanceof Ipv6NextHopCase) {
  57                         final Ipv6NextHop ipv6 = ((Ipv6NextHopCase) nh).getIpv6NextHop();
  58
  59                         return new NodeId(ipv6.getGlobal().getValue());
  60                 } else {
  61                         LOG.warn("Unhandled next hop class {}", nh.getImplementedInterface());
  62                         return null;
  63                 }
  64         }
  65
  66         private InstanceIdentifier<Node1> nodeInstanceId(final NodeId ni) {
  67                 return InstanceIdentifier.builder(getInstanceIdentifier()).child(Node.class, new NodeKey(ni)).augmentation(Node1.class).toInstance();
  68         }
  69
  70         private InstanceIdentifier<Node1> ensureNodePresent(final DataModification<InstanceIdentifier<?>, DataObject> trans, final NodeId ni) {
  71                 final InstanceIdentifier<Node1> nii = nodeInstanceId(ni);
  72                 LOG.debug("Looking for pre-existing node at {}", nii);
  73
  74                 if (trans.readOperationalData(nii) == null) {
  75                         LOG.debug("Create a new node at {}", nii);
  76                         trans.putOperationalData(
  77                                         nii,
  78                                         new Node1Builder().setIgpNodeAttributes(new IgpNodeAttributesBuilder().setPrefix(new ArrayList<Prefix>()).build()).build());
  79                 }
  80
  81                 return nii;
  82         }
  83
  84         private void removeEmptyNode(final DataModification<InstanceIdentifier<?>, DataObject> trans, final InstanceIdentifier<Node1> nii) {
  85                 final Node1 node = (Node1) trans.readOperationalData(nii);
  86                 if (node != null && node.getIgpNodeAttributes().getPrefix().isEmpty()) {
  87                         trans.removeOperationalData(nii);
  88                 }
  89         }
  90
  91         protected abstract Attributes getAttributes(final T value);
  92
  93         protected abstract IpPrefix getPrefix(final T value);
  94
  95         @Override
  96         protected final void createObject(final DataModification<InstanceIdentifier<?>, DataObject> trans, final InstanceIdentifier<T> id,
  97                         final T value) {
  98                 final NodeId ni = advertizingNode(getAttributes(value));
  99                 final InstanceIdentifier<Node1> nii = ensureNodePresent(trans, ni);
 100
 101                 final IpPrefix prefix = getPrefix(value);
 102                 final PrefixKey pk = new PrefixKey(prefix);
 103
 104                 trans.putOperationalData(
 105                                 InstanceIdentifier.builder(nii).child(
 106                                                 org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.node.attributes.IgpNodeAttributes.class).child(
 107                                                                 Prefix.class, pk).toInstance(), new PrefixBuilder().setKey(pk).setPrefix(prefix).build());
 108         }
 109
 110         @Override
 111         protected final void removeObject(final DataModification<InstanceIdentifier<?>, DataObject> trans, final InstanceIdentifier<T> id,
 112                         final T value) {
 113                 final NodeId ni = advertizingNode(getAttributes(value));
 114                 final InstanceIdentifier<Node1> nii = nodeInstanceId(ni);
 115
 116                 final IpPrefix prefix = getPrefix(value);
 117                 final PrefixKey pk = new PrefixKey(prefix);
 118
 119                 trans.removeOperationalData(InstanceIdentifier.builder(nii).child(
 120                                 org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.node.attributes.IgpNodeAttributes.class).child(
 121                                                 Prefix.class, pk).toInstance());
 122
 123                 removeEmptyNode(trans, nii);
 124         }
 125
 126 }