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