Examples with Network com.google.common.graph.Network used on opensource projects

Example 1 with Network

use of com.google.common.graph.Network in project DaggerCodeParse-2.38.1base by hellogaod.

the class ExternalBindingGraphConverter method fromSpiModel.

private static ImmutableNetwork<Node, Edge> fromSpiModel(Network<dagger.spi.model.BindingGraph.Node, dagger.spi.model.BindingGraph.Edge> spiNetwork) {
    MutableNetwork<Node, Edge> network = NetworkBuilder.directed().allowsParallelEdges(true).allowsSelfLoops(true).build();
    ImmutableMap<dagger.spi.model.BindingGraph.Node, Node> fromSpiNodes = spiNetwork.nodes().stream().collect(toImmutableMap(spiNode -> spiNode, ExternalBindingGraphConverter::fromSpiModel));
    for (Node node : fromSpiNodes.values()) {
        network.addNode(node);
    }
    for (dagger.spi.model.BindingGraph.Edge edge : spiNetwork.edges()) {
        EndpointPair<dagger.spi.model.BindingGraph.Node> edgePair = spiNetwork.incidentNodes(edge);
        network.addEdge(fromSpiNodes.get(edgePair.source()), fromSpiNodes.get(edgePair.target()), fromSpiModel(edge));
    }
    return ImmutableNetwork.copyOf(network);
}

Example 2 with Network

use of com.google.common.graph.Network in project batfish by batfish.

the class BgpTopologyUtils method initBgpTopology.

/**
 * Compute the BGP topology -- a network of {@link BgpPeerConfigId}s connected by {@link
 * BgpSessionProperties}.
 *
 * @param configurations node configurations, keyed by hostname
 * @param ipVrfOwners network Ip owners (see {@link IpOwners#computeIpNodeOwners(Map, boolean)}
 *     for reference)
 * @param keepInvalid whether to keep improperly configured neighbors. If performing configuration
 *     checks, you probably want this set to {@code true}, otherwise (e.g., computing dataplane)
 *     you want this to be {@code false}.
 * @param checkReachability whether to perform dataplane-level checks to ensure that neighbors are
 *     reachable and sessions can be established correctly. <b>Note:</b> this is different from
 *     {@code keepInvalid=false}, which only does filters invalid neighbors at the control-plane
 *     level
 * @param tracerouteEngine an instance of {@link TracerouteEngine} for doing reachability checks.
 * @param l3Adjacencies {@link L3Adjacencies} of the network, for checking BGP unnumbered
 *     reachability.
 * @return A graph ({@link Network}) representing all BGP peerings.
 */
@Nonnull
public static BgpTopology initBgpTopology(Map<String, Configuration> configurations, Map<Ip, Map<String, Set<String>>> ipVrfOwners, boolean keepInvalid, boolean checkReachability, @Nullable TracerouteEngine tracerouteEngine, Map<String, Map<String, Fib>> fibs, L3Adjacencies l3Adjacencies) {
    checkArgument(!checkReachability || !keepInvalid, "Cannot check reachability while keeping invalid peers");
    checkArgument(!checkReachability || tracerouteEngine != null, "Cannot check reachability without a traceroute engine");
    // TODO: handle duplicate ips on different vrfs
    NetworkConfigurations networkConfigurations = NetworkConfigurations.of(configurations);
    /*
     * First pass: identify all addresses "owned" by BgpNeighbors, add neighbor ids as vertices to
     * the graph; dynamically determine local IPs as needed
     */
    MutableValueGraph<BgpPeerConfigId, BgpSessionProperties> graph = ValueGraphBuilder.directed().allowsSelfLoops(false).build();
    /*
     * Multimap of active peers' BgpPeerConfigIds to all IPs that each peer may use as local IP
     * when initiating a session. For a peer with an explicitly configured local IP, that IP is
     * the only value associated with the peer in this map. Otherwise:
     * - If FIBs are provided, the map contains all local IPs with which the peer may initiate,
     *   as inferred by getPotentialSrcIps().
     * - Else no IPs are associated with the peer.
     */
    ImmutableSetMultimap.Builder<BgpPeerConfigId, Ip> localIpsBuilder = ImmutableSetMultimap.builder();
    for (Configuration node : configurations.values()) {
        String hostname = node.getHostname();
        for (Vrf vrf : node.getVrfs().values()) {
            String vrfName = vrf.getName();
            BgpProcess proc = vrf.getBgpProcess();
            if (proc == null) {
                // nothing to do if no bgp process on this VRF
                continue;
            }
            Fib fib = fibs.getOrDefault(hostname, ImmutableMap.of()).get(vrfName);
            for (Entry<Ip, BgpActivePeerConfig> e : proc.getActiveNeighbors().entrySet()) {
                Ip peerAddress = e.getKey();
                BgpActivePeerConfig config = e.getValue();
                if (!keepInvalid && !bgpConfigPassesSanityChecks(config, hostname, vrfName, ipVrfOwners)) {
                    continue;
                }
                BgpPeerConfigId neighborId = new BgpPeerConfigId(hostname, vrfName, peerAddress.toPrefix(), false);
                graph.addNode(neighborId);
                if (config.getLocalIp() != null) {
                    localIpsBuilder.put(neighborId, config.getLocalIp());
                } else if (fib != null) {
                    // No explicitly configured local IP. Check for dynamically resolvable local IPs.
                    localIpsBuilder.putAll(neighborId, getPotentialSrcIps(peerAddress, fib, node));
                }
            }
            // Dynamic peers: map of prefix to BgpPassivePeerConfig
            proc.getPassiveNeighbors().entrySet().stream().filter(entry -> keepInvalid || bgpConfigPassesSanityChecks(entry.getValue(), hostname, vrfName, ipVrfOwners)).forEach(entry -> graph.addNode(new BgpPeerConfigId(hostname, vrfName, entry.getKey(), true)));
            // Unnumbered BGP peers: map of interface name to BgpUnnumberedPeerConfig
            proc.getInterfaceNeighbors().entrySet().stream().filter(e -> keepInvalid || bgpConfigPassesSanityChecks(e.getValue(), hostname, vrfName, ipVrfOwners)).forEach(e -> graph.addNode(new BgpPeerConfigId(hostname, vrf.getName(), e.getKey())));
        }
    }
    // Second pass: add edges to the graph. Note, these are directed edges.
    Map<String, Multimap<String, BgpPeerConfigId>> receivers = new HashMap<>();
    for (BgpPeerConfigId peer : graph.nodes()) {
        if (peer.getType() == BgpPeerConfigType.UNNUMBERED) {
            // Unnumbered configs only form sessions with each other
            continue;
        }
        Multimap<String, BgpPeerConfigId> vrf = receivers.computeIfAbsent(peer.getHostname(), name -> LinkedListMultimap.create());
        vrf.put(peer.getVrfName(), peer);
    }
    SetMultimap<BgpPeerConfigId, Ip> localIps = localIpsBuilder.build();
    for (BgpPeerConfigId neighborId : graph.nodes()) {
        switch(neighborId.getType()) {
            case DYNAMIC:
                // Passive end of the peering cannot initiate a connection
                continue;
            case ACTIVE:
                addActivePeerEdges(neighborId, graph, networkConfigurations, ipVrfOwners, receivers, localIps.get(neighborId), checkReachability, tracerouteEngine);
                break;
            case UNNUMBERED:
                addUnnumberedPeerEdges(neighborId, graph, networkConfigurations, l3Adjacencies);
                break;
            default:
                throw new IllegalArgumentException(String.format("Unrecognized peer type: %s", neighborId));
        }
    }
    return new BgpTopology(graph);
}