Examples with Path org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.pcupd.message.pcupd.message.updates.Path used on opensource projects

Example 46 with Path

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.pcupd.message.pcupd.message.updates.Path in project bgpcep by opendaylight.

the class AddPathAllPathsTest method testUseCase1.

/*
     * All-Paths
     *                                            ___________________
     *                                           | ODL BGP 127.0.0.1 |
     * [peer://127.0.0.2; p1, lp100] --(iBGP)--> |                   | --(RR-client, non add-path) --> [Peer://127.0.0.5; (p1, lp100), (p1, lp1200)]
     * [peer://127.0.0.3; p1, lp200] --(iBGP)--> |                   |
     * [peer://127.0.0.4; p1, lp50] --(iBGP)-->  |                   | --(RR-client, add-path) --> [Peer://127.0.0.6; (p1, path-id1, lp100), (p1, path-id2, pl50), (p1, path-id3, pl200), (p1, path-id4, pl20)]
     * [peer://127.0.0.2; p1, lp20] --(iBGP)-->  |___________________|
     * p1 = 1.1.1.1/32
     */
@Test
public void testUseCase1() throws Exception {
    final BgpParameters nonAddPathParams = createParameter(false);
    final BgpParameters addPathParams = createParameter(true);
    final BGPPeer peer1 = configurePeer(PEER1, this.ribImpl, nonAddPathParams, PeerRole.Ibgp, this.serverRegistry);
    final BGPSessionImpl session1 = createPeerSession(PEER1, nonAddPathParams, new SimpleSessionListener());
    configurePeer(PEER2, this.ribImpl, nonAddPathParams, PeerRole.Ibgp, this.serverRegistry);
    final BGPSessionImpl session2 = createPeerSession(PEER2, nonAddPathParams, new SimpleSessionListener());
    configurePeer(PEER3, this.ribImpl, nonAddPathParams, PeerRole.Ibgp, this.serverRegistry);
    final BGPSessionImpl session3 = createPeerSession(PEER3, nonAddPathParams, new SimpleSessionListener());
    final SimpleSessionListener listener4 = new SimpleSessionListener();
    final BGPPeer peer4 = configurePeer(PEER4, this.ribImpl, nonAddPathParams, PeerRole.RrClient, this.serverRegistry);
    BGPPeerState peer4State = peer4.getPeerState();
    assertNull(peer4State.getGroupId());
    assertEquals(new IpAddress(PEER4), peer4State.getNeighborAddress());
    assertEquals(0L, peer4State.getTotalPathsCount());
    assertEquals(0L, peer4State.getTotalPrefixes());
    assertNull(peer4State.getBGPTimersState());
    assertNull(peer4State.getBGPTransportState());
    assertNull(peer4State.getBGPSessionState());
    assertEquals(0L, peer4State.getBGPErrorHandlingState().getErroneousUpdateReceivedCount());
    BGPGracelfulRestartState gracefulRestart = peer4State.getBGPGracelfulRestart();
    assertFalse(gracefulRestart.isGracefulRestartAdvertized(TABLES_KEY));
    assertFalse(gracefulRestart.isGracefulRestartReceived(TABLES_KEY));
    assertFalse(gracefulRestart.isLocalRestarting());
    assertFalse(gracefulRestart.isPeerRestarting());
    assertEquals(0L, gracefulRestart.getPeerRestartTime());
    BGPAfiSafiState afiSafiState = peer4State.getBGPAfiSafiState();
    assertEquals(AFI_SAFIS_ADVERTIZED, afiSafiState.getAfiSafisAdvertized());
    assertEquals(Collections.emptySet(), afiSafiState.getAfiSafisReceived());
    assertEquals(0L, afiSafiState.getPrefixesSentCount(TABLES_KEY));
    assertEquals(0L, afiSafiState.getPrefixesReceivedCount(TABLES_KEY));
    assertEquals(0L, afiSafiState.getPrefixesInstalledCount(TABLES_KEY));
    assertFalse(afiSafiState.isGracefulRestartAdvertized(TABLES_KEY));
    assertFalse(afiSafiState.isGracefulRestartAdvertized(TABLES_KEY));
    assertFalse(afiSafiState.isLocalRestarting());
    assertFalse(afiSafiState.isPeerRestarting());
    assertFalse(afiSafiState.isAfiSafiSupported(TABLES_KEY));
    final BGPSessionImpl session4 = createPeerSession(PEER4, nonAddPathParams, listener4);
    final SimpleSessionListener listener5 = new SimpleSessionListener();
    configurePeer(PEER5, this.ribImpl, addPathParams, PeerRole.RrClient, this.serverRegistry);
    final BGPSessionImpl session5 = createPeerSession(PEER5, addPathParams, listener5);
    checkPeersPresentOnDataStore(5);
    // the best route
    sendRouteAndCheckIsOnLocRib(session1, PREFIX1, 100, 1);
    checkReceivedMessages(listener4, 1);
    checkReceivedMessages(listener5, 1);
    assertEquals(UPD_100, listener5.getListMsg().get(0));
    final BGPPeerState peer1State = peer1.getPeerState();
    assertNull(peer1State.getGroupId());
    assertEquals(new IpAddress(PEER1), peer1State.getNeighborAddress());
    assertEquals(1L, peer1State.getTotalPathsCount());
    assertEquals(1L, peer1State.getTotalPrefixes());
    final BGPTimersState timerStatePeer1 = peer1State.getBGPTimersState();
    assertEquals(HOLDTIMER, timerStatePeer1.getNegotiatedHoldTime());
    assertTrue(timerStatePeer1.getUpTime() > 0L);
    final BGPTransportState transportStatePeer1 = peer1State.getBGPTransportState();
    assertEquals(new PortNumber(PORT), transportStatePeer1.getLocalPort());
    assertEquals(new IpAddress(PEER1), transportStatePeer1.getRemoteAddress());
    assertEquals(State.UP, peer1State.getBGPSessionState().getSessionState());
    checkEquals(() -> assertEquals(1L, peer1State.getBGPPeerMessagesState().getUpdateMessagesReceivedCount()));
    checkEquals(() -> assertEquals(0L, peer1State.getBGPPeerMessagesState().getUpdateMessagesSentCount()));
    final BGPSessionState sessionStatePeer1 = peer1State.getBGPSessionState();
    assertFalse(sessionStatePeer1.isAddPathCapabilitySupported());
    assertFalse(sessionStatePeer1.isAsn32CapabilitySupported());
    assertFalse(sessionStatePeer1.isGracefulRestartCapabilitySupported());
    assertTrue(sessionStatePeer1.isMultiProtocolCapabilitySupported());
    assertFalse(sessionStatePeer1.isRouterRefreshCapabilitySupported());
    final BGPAfiSafiState afiSafiStatePeer1 = peer1State.getBGPAfiSafiState();
    assertEquals(AFI_SAFIS_ADVERTIZED, afiSafiStatePeer1.getAfiSafisAdvertized());
    assertEquals(AFI_SAFIS_ADVERTIZED, afiSafiStatePeer1.getAfiSafisReceived());
    assertEquals(0L, afiSafiStatePeer1.getPrefixesSentCount(TABLES_KEY));
    assertEquals(1L, afiSafiStatePeer1.getPrefixesReceivedCount(TABLES_KEY));
    assertEquals(1L, afiSafiStatePeer1.getPrefixesInstalledCount(TABLES_KEY));
    assertFalse(afiSafiStatePeer1.isGracefulRestartAdvertized(TABLES_KEY));
    assertFalse(afiSafiStatePeer1.isGracefulRestartAdvertized(TABLES_KEY));
    assertFalse(afiSafiStatePeer1.isLocalRestarting());
    assertFalse(afiSafiStatePeer1.isPeerRestarting());
    assertTrue(afiSafiStatePeer1.isAfiSafiSupported(TABLES_KEY));
    final BGPRibState ribState = this.ribImpl.getRIBState();
    assertEquals(1, ribState.getPathsCount().size());
    assertEquals(1L, ribState.getTablesPrefixesCount().size());
    assertEquals(BGP_ID, ribState.getRouteId());
    assertEquals(AS_NUMBER, ribState.getAs());
    assertEquals(1L, ribState.getPathCount(TABLES_KEY));
    assertEquals(1L, ribState.getPrefixesCount(TABLES_KEY));
    assertEquals(1L, ribState.getTotalPathsCount());
    assertEquals(1L, ribState.getTotalPrefixesCount());
    final SimpleSessionListener listener6 = new SimpleSessionListener();
    final BGPPeer peer6 = configurePeer(PEER6, this.ribImpl, nonAddPathParams, PeerRole.RrClient, this.serverRegistry);
    final BGPSessionImpl session6 = createPeerSession(PEER6, nonAddPathParams, listener6);
    checkPeersPresentOnDataStore(6);
    checkReceivedMessages(listener6, 1);
    assertEquals(UPD_NA_100, listener6.getListMsg().get(0));
    causeBGPError(session6);
    checkEquals(() -> assertEquals(1L, peer6.getPeerState().getBGPPeerMessagesState().getNotificationMessagesSentCount()));
    checkPeersPresentOnDataStore(5);
    // the second best route
    sendRouteAndCheckIsOnLocRib(session2, PREFIX1, 50, 2);
    checkReceivedMessages(listener4, 1);
    checkReceivedMessages(listener5, 2);
    assertEquals(UPD_50, listener5.getListMsg().get(1));
    // new best route
    sendRouteAndCheckIsOnLocRib(session3, PREFIX1, 200, 3);
    checkReceivedMessages(listener4, 2);
    checkReceivedMessages(listener5, 3);
    assertEquals(UPD_200, listener5.getListMsg().get(2));
    peer4State = peer4.getPeerState();
    assertNull(peer4State.getGroupId());
    assertEquals(new IpAddress(PEER4), peer4State.getNeighborAddress());
    assertEquals(0L, peer4State.getTotalPathsCount());
    assertEquals(0L, peer4State.getTotalPrefixes());
    final BGPTimersState timerState = peer4State.getBGPTimersState();
    assertEquals(HOLDTIMER, timerState.getNegotiatedHoldTime());
    assertTrue(timerState.getUpTime() > 0L);
    final BGPTransportState transportState = peer4State.getBGPTransportState();
    assertEquals(new PortNumber(PORT), transportState.getLocalPort());
    assertEquals(new IpAddress(PEER4), transportState.getRemoteAddress());
    final BGPPeerMessagesState peerMessagesState = peer4State.getBGPPeerMessagesState();
    assertEquals(0L, peerMessagesState.getNotificationMessagesReceivedCount());
    assertEquals(0L, peerMessagesState.getNotificationMessagesSentCount());
    assertEquals(0L, peerMessagesState.getUpdateMessagesReceivedCount());
    assertEquals(2L, peerMessagesState.getUpdateMessagesSentCount());
    final BGPSessionState bgpSessionState = peer4State.getBGPSessionState();
    assertEquals(State.UP, bgpSessionState.getSessionState());
    assertFalse(bgpSessionState.isAddPathCapabilitySupported());
    assertFalse(bgpSessionState.isAsn32CapabilitySupported());
    assertFalse(bgpSessionState.isGracefulRestartCapabilitySupported());
    assertTrue(bgpSessionState.isMultiProtocolCapabilitySupported());
    assertFalse(bgpSessionState.isRouterRefreshCapabilitySupported());
    final BGPErrorHandlingState errorHandling = peer4State.getBGPErrorHandlingState();
    assertEquals(0L, errorHandling.getErroneousUpdateReceivedCount());
    gracefulRestart = peer4State.getBGPGracelfulRestart();
    assertFalse(gracefulRestart.isGracefulRestartAdvertized(TABLES_KEY));
    assertFalse(gracefulRestart.isGracefulRestartReceived(TABLES_KEY));
    assertFalse(gracefulRestart.isLocalRestarting());
    assertFalse(gracefulRestart.isPeerRestarting());
    assertEquals(0L, gracefulRestart.getPeerRestartTime());
    afiSafiState = peer4State.getBGPAfiSafiState();
    assertEquals(AFI_SAFIS_ADVERTIZED, afiSafiState.getAfiSafisAdvertized());
    assertEquals(AFI_SAFIS_ADVERTIZED, afiSafiState.getAfiSafisReceived());
    assertEquals(2L, afiSafiState.getPrefixesSentCount(TABLES_KEY));
    assertEquals(0L, afiSafiState.getPrefixesReceivedCount(TABLES_KEY));
    assertEquals(0L, afiSafiState.getPrefixesInstalledCount(TABLES_KEY));
    assertFalse(afiSafiState.isGracefulRestartAdvertized(TABLES_KEY));
    assertFalse(afiSafiState.isGracefulRestartAdvertized(TABLES_KEY));
    assertFalse(afiSafiState.isLocalRestarting());
    assertFalse(afiSafiState.isPeerRestarting());
    assertTrue(afiSafiState.isAfiSafiSupported(TABLES_KEY));
    // the worst route
    sendRouteAndCheckIsOnLocRib(session1, PREFIX1, 20, 3);
    checkReceivedMessages(listener4, 2);
    checkReceivedMessages(listener5, 4);
    assertEquals(UPD_200.getAttributes().getLocalPref(), ((Update) listener4.getListMsg().get(1)).getAttributes().getLocalPref());
    assertEquals(UPD_20, listener5.getListMsg().get(3));
    // withdraw second best route, 1 advertisement(1 withdrawal) for add-path supported, none for non add path
    sendWithdrawalRouteAndCheckIsOnLocRib(session1, PREFIX1, 100, 2);
    checkReceivedMessages(listener4, 2);
    checkReceivedMessages(listener5, 5);
    // we advertise again to try new test
    sendRouteAndCheckIsOnLocRib(session1, PREFIX1, 100, 3);
    checkReceivedMessages(listener4, 2);
    checkReceivedMessages(listener5, 6);
    assertEquals(UPD_200, listener5.getListMsg().get(2));
    // withdraw second best route, 1 advertisement(1 withdrawal) for add-path supported, 1 for non add path (withdrawal)
    sendWithdrawalRouteAndCheckIsOnLocRib(session3, PREFIX1, 200, 2);
    checkReceivedMessages(listener4, 3);
    checkReceivedMessages(listener5, 7);
    sendNotification(session1);
    checkEquals(() -> assertEquals(1L, peer1.getPeerState().getBGPPeerMessagesState().getNotificationMessagesReceivedCount()));
    session1.close();
    session2.close();
    session3.close();
    session4.close();
    session5.close();
}

Example 47 with Path

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.pcupd.message.pcupd.message.updates.Path in project bgpcep by opendaylight.

the class AddPathNPathsTest method testUseCase1.

/*
     * N-Paths
     *                                            ___________________
     *                                           | ODL BGP 127.0.0.1 |
     * [peer://127.0.0.2; p1, lp100] --(iBGP)--> |                   | --(RR-client, non add-path) --> [Peer://127.0.0.5; (p1, lp100), (p1, lp1200)]
     * [peer://127.0.0.3; p1, lp200] --(iBGP)--> |                   |
     * [peer://127.0.0.4; p1, lp50] --(iBGP)-->  |                   | --(RR-client, add-path) --> [Peer://127.0.0.6; (p1, path-id1, lp100), (p1, path-id2, pl50), (p1, path-id3, pl200)]
     * [peer://127.0.0.2; p1, lp20] --(iBGP)-->  |___________________|
     * p1 = 1.1.1.1/32
     */
@Test
public void testUseCase1() throws Exception {
    final BgpParameters nonAddPathParams = createParameter(false);
    final BgpParameters addPathParams = createParameter(true);
    configurePeer(PEER1, this.ribImpl, nonAddPathParams, PeerRole.Ibgp, this.serverRegistry);
    final BGPSessionImpl session1 = createPeerSession(PEER1, nonAddPathParams, new SimpleSessionListener());
    configurePeer(PEER2, this.ribImpl, nonAddPathParams, PeerRole.Ibgp, this.serverRegistry);
    final BGPSessionImpl session2 = createPeerSession(PEER2, nonAddPathParams, new SimpleSessionListener());
    configurePeer(PEER3, this.ribImpl, nonAddPathParams, PeerRole.Ibgp, this.serverRegistry);
    final BGPSessionImpl session3 = createPeerSession(PEER3, nonAddPathParams, new SimpleSessionListener());
    final SimpleSessionListener listener4 = new SimpleSessionListener();
    configurePeer(PEER4, this.ribImpl, nonAddPathParams, PeerRole.RrClient, this.serverRegistry);
    final BGPSessionImpl session4 = createPeerSession(PEER4, nonAddPathParams, listener4);
    final SimpleSessionListener listener5 = new SimpleSessionListener();
    configurePeer(PEER5, this.ribImpl, addPathParams, PeerRole.RrClient, this.serverRegistry);
    final BGPSessionImpl session5 = createPeerSession(PEER5, addPathParams, listener5);
    checkPeersPresentOnDataStore(5);
    // new best route so far
    sendRouteAndCheckIsOnLocRib(session1, PREFIX1, 100, 1);
    checkReceivedMessages(listener4, 1);
    checkReceivedMessages(listener5, 1);
    assertEquals(UPD_100, listener5.getListMsg().get(0));
    final SimpleSessionListener listener6 = new SimpleSessionListener();
    configurePeer(PEER6, this.ribImpl, nonAddPathParams, PeerRole.RrClient, this.serverRegistry);
    final BGPSessionImpl session6 = createPeerSession(PEER6, nonAddPathParams, listener6);
    checkPeersPresentOnDataStore(6);
    checkReceivedMessages(listener6, 1);
    assertEquals(UPD_NA_100, listener6.getListMsg().get(0));
    session6.close();
    checkPeersPresentOnDataStore(5);
    // the second best route
    sendRouteAndCheckIsOnLocRib(session2, PREFIX1, 50, 2);
    checkReceivedMessages(listener4, 1);
    checkReceivedMessages(listener5, 2);
    assertEquals(UPD_50, listener5.getListMsg().get(1));
    // new best route
    sendRouteAndCheckIsOnLocRib(session3, PREFIX1, 200, 2);
    checkReceivedMessages(listener4, 2);
    checkReceivedMessages(listener5, 3);
    assertEquals(UPD_200, listener5.getListMsg().get(2));
    // the worst prefix, no changes
    sendRouteAndCheckIsOnLocRib(session2, PREFIX1, 20, 2);
    checkReceivedMessages(listener4, 2);
    checkReceivedMessages(listener5, 3);
    // withdraw second best route, 2 advertisement (1 withdrawal) for add-path supported, none for non add path
    sendWithdrawalRouteAndCheckIsOnLocRib(session1, PREFIX1, 100, 2);
    checkReceivedMessages(listener4, 2);
    checkReceivedMessages(listener5, 5);
    // we advertise again to try new test
    sendRouteAndCheckIsOnLocRib(session1, PREFIX1, 100, 2);
    checkReceivedMessages(listener4, 2);
    checkReceivedMessages(listener5, 6);
    // withdraw second best route, 2 advertisement (1 withdrawal) for add-path supported, 1 withdrawal for non add path
    sendWithdrawalRouteAndCheckIsOnLocRib(session3, PREFIX1, 200, 2);
    checkReceivedMessages(listener4, 3);
    checkReceivedMessages(listener5, 8);
    session1.close();
    session2.close();
    session3.close();
    session4.close();
    session5.close();
}

Example 48 with Path

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.pcupd.message.pcupd.message.updates.Path in project bgpcep by opendaylight.

the class BGPPeer method onSessionUp.

@Override
public synchronized void onSessionUp(final BGPSession session) {
    this.session = session;
    if (this.session instanceof BGPSessionStateProvider) {
        ((BGPSessionStateProvider) this.session).registerMessagesCounter(this);
    }
    final List<AddressFamilies> addPathTablesType = session.getAdvertisedAddPathTableTypes();
    final Set<BgpTableType> advertizedTableTypes = session.getAdvertisedTableTypes();
    final List<BgpTableType> advertizedGracefulRestartTableTypes = session.getAdvertisedGracefulRestartTableTypes();
    LOG.info("Session with peer {} went up with tables {} and Add Path tables {}", this.name, advertizedTableTypes, addPathTablesType);
    this.rawIdentifier = InetAddresses.forString(session.getBgpId().getValue()).getAddress();
    final Set<TablesKey> setTables = advertizedTableTypes.stream().map(t -> new TablesKey(t.getAfi(), t.getSafi())).collect(Collectors.toSet());
    this.tables = ImmutableSet.copyOf(setTables);
    setAdvertizedGracefulRestartTableTypes(advertizedGracefulRestartTableTypes.stream().map(t -> new TablesKey(t.getAfi(), t.getSafi())).collect(Collectors.toList()));
    this.addPathTableMaps = ImmutableMap.copyOf(mapTableTypesFamilies(addPathTablesType));
    this.trackerRegistration = this.rib.getPeerTracker().registerPeer(this);
    for (final TablesKey key : this.tables) {
        createAdjRibOutListener(key, true);
    }
    addBgp4Support();
    this.effRibInWriter = EffectiveRibInWriter.create(this, this.rib, this.rib.createPeerChain(this), this.peerIId, this.tables);
    registerPrefixesCounters(this.effRibInWriter, this.effRibInWriter);
    this.ribWriter = this.ribWriter.transform(this.peerId, this.rib.getRibSupportContext(), this.tables, this.addPathTableMaps);
    if (this.rpcRegistry != null) {
        this.rpcRegistration = this.rpcRegistry.addRoutedRpcImplementation(BgpPeerRpcService.class, new BgpPeerRpc(this, session, this.tables));
        final KeyedInstanceIdentifier<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev171207.bgp.rib.rib.Peer, PeerKey> path = this.rib.getInstanceIdentifier().child(org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev171207.bgp.rib.rib.Peer.class, new PeerKey(this.peerId));
        this.rpcRegistration.registerPath(PeerContext.class, path);
    }
}

Example 49 with Path

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.pcupd.message.pcupd.message.updates.Path in project bgpcep by opendaylight.

the class AbstractTopologySessionListener method updateLsp.

/**
 * Update an LSP in the data store.
 *
 * @param ctx       Message context
 * @param id        Revision-specific LSP identifier
 * @param lspName   LSP name
 * @param rlb       Reported LSP builder
 * @param solicited True if the update was solicited
 * @param remove    True if this is an LSP path removal
 */
protected final synchronized void updateLsp(final MessageContext ctx, final L id, final String lspName, final ReportedLspBuilder rlb, final boolean solicited, final boolean remove) {
    final String name;
    if (lspName == null) {
        name = this.lsps.get(id);
        if (name == null) {
            LOG.error("PLSPID {} seen for the first time, not reporting the LSP", id);
            return;
        }
    } else {
        name = lspName;
    }
    LOG.debug("Saved LSP {} with name {}", id, name);
    this.lsps.put(id, name);
    final ReportedLsp previous = this.lspData.get(name);
    // if no previous report about the lsp exist, just proceed
    if (previous != null) {
        final List<Path> updatedPaths = makeBeforeBreak(rlb, previous, name, remove);
        // if all paths or the last path were deleted, delete whole tunnel
        if (updatedPaths.isEmpty()) {
            LOG.debug("All paths were removed, removing LSP with {}.", id);
            removeLsp(ctx, id);
            return;
        }
        rlb.setPath(updatedPaths);
    }
    rlb.setKey(new ReportedLspKey(name));
    rlb.setName(name);
    // If this is an unsolicited update. We need to make sure we retain the metadata already present
    if (solicited) {
        this.nodeState.setLspMetadata(name, rlb.getMetadata());
    } else {
        rlb.setMetadata(this.nodeState.getLspMetadata(name));
    }
    final ReportedLsp rl = rlb.build();
    ctx.trans.put(LogicalDatastoreType.OPERATIONAL, this.pccIdentifier.child(ReportedLsp.class, rlb.getKey()), rl);
    LOG.debug("LSP {} updated to MD-SAL", name);
    this.lspData.put(name, rl);
}

Example 50 with Path

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.pcupd.message.pcupd.message.updates.Path in project bgpcep by opendaylight.

the class AbstractTopologySessionListener method makeBeforeBreak.

private List<Path> makeBeforeBreak(final ReportedLspBuilder rlb, final ReportedLsp previous, final String name, final boolean remove) {
    // just one path should be reported
    Preconditions.checkState(rlb.getPath().size() == 1);
    final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.LspId reportedLspId = rlb.getPath().get(0).getLspId();
    final List<Path> updatedPaths;
    // remove existing tunnel's paths now, as explicit path remove will not come
    if (!remove && reportedLspId.getValue() == 0) {
        updatedPaths = new ArrayList<>();
        LOG.debug("Remove previous paths {} to this lsp name {}", previous.getPath(), name);
    } else {
        // check previous report for existing paths
        updatedPaths = new ArrayList<>(previous.getPath());
        LOG.debug("Found previous paths {} to this lsp name {}", updatedPaths, name);
        for (final Path path : previous.getPath()) {
            // we found reported path in previous reports
            if (path.getLspId().getValue() == 0 || path.getLspId().equals(reportedLspId)) {
                LOG.debug("Match on lsp-id {}", path.getLspId().getValue());
                // path that was reported previously and does have the same lsp-id, path will be updated
                final boolean r = updatedPaths.remove(path);
                LOG.trace("Request removed? {}", r);
            }
        }
    }
    // if the path does not exist in previous report, add it to path list, it's a new ERO
    // only one path will be added
    // lspId is 0 means confirmation message that shouldn't be added (because we have no means of deleting it later)
    LOG.trace("Adding new path {} to {}", rlb.getPath(), updatedPaths);
    updatedPaths.addAll(rlb.getPath());
    if (remove) {
        if (reportedLspId.getValue() == 0) {
            // if lsp-id also 0, remove all paths
            LOG.debug("Removing all paths.");
            updatedPaths.clear();
        } else {
            // path is marked to be removed
            LOG.debug("Removing path {} from {}", rlb.getPath(), updatedPaths);
            final boolean r = updatedPaths.removeAll(rlb.getPath());
            LOG.trace("Request removed? {}", r);
        }
    }
    LOG.debug("Setting new paths {} to lsp {}", updatedPaths, name);
    return updatedPaths;
}