2 * Copyright © 2017 AT&T and others. All rights reserved.
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
9 package org.opendaylight.transportpce.olm.service;
11 import com.google.common.base.Strings;
12 import com.google.common.util.concurrent.ListenableFuture;
13 import java.math.BigDecimal;
14 import java.math.RoundingMode;
15 import java.util.ArrayList;
16 import java.util.Collections;
17 import java.util.HashMap;
18 import java.util.List;
20 import java.util.Map.Entry;
21 import java.util.Optional;
23 import java.util.concurrent.ExecutionException;
24 import java.util.concurrent.Future;
25 import java.util.concurrent.TimeUnit;
26 import java.util.concurrent.TimeoutException;
27 import java.util.stream.Collectors;
28 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
29 import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
30 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
31 import org.opendaylight.transportpce.common.InstanceIdentifiers;
32 import org.opendaylight.transportpce.common.NetworkUtils;
33 import org.opendaylight.transportpce.common.Timeouts;
34 import org.opendaylight.transportpce.common.device.DeviceTransaction;
35 import org.opendaylight.transportpce.common.device.DeviceTransactionManager;
36 import org.opendaylight.transportpce.common.mapping.PortMapping;
37 import org.opendaylight.transportpce.olm.power.PowerMgmt;
38 import org.opendaylight.transportpce.olm.util.OlmUtils;
39 import org.opendaylight.transportpce.olm.util.OtsPmHolder;
40 import org.opendaylight.yang.gen.v1.http.org.openroadm.common.types.rev161014.RatioDB;
41 import org.opendaylight.yang.gen.v1.http.org.openroadm.device.rev170206.interfaces.grp.Interface;
42 import org.opendaylight.yang.gen.v1.http.org.openroadm.device.rev170206.interfaces.grp.InterfaceBuilder;
43 import org.opendaylight.yang.gen.v1.http.org.openroadm.device.rev170206.interfaces.grp.InterfaceKey;
44 import org.opendaylight.yang.gen.v1.http.org.openroadm.device.rev170206.org.openroadm.device.container.OrgOpenroadmDevice;
45 import org.opendaylight.yang.gen.v1.http.org.openroadm.network.topology.rev170929.Link1;
46 import org.opendaylight.yang.gen.v1.http.org.openroadm.network.types.rev170929.OpenroadmLinkType;
47 import org.opendaylight.yang.gen.v1.http.org.openroadm.optical.transport.interfaces.rev161014.Interface1;
48 import org.opendaylight.yang.gen.v1.http.org.openroadm.optical.transport.interfaces.rev161014.Interface1Builder;
49 import org.opendaylight.yang.gen.v1.http.org.openroadm.optical.transport.interfaces.rev161014.ots.container.Ots;
50 import org.opendaylight.yang.gen.v1.http.org.openroadm.optical.transport.interfaces.rev161014.ots.container.OtsBuilder;
51 import org.opendaylight.yang.gen.v1.http.org.openroadm.pm.types.rev161014.PmGranularity;
52 import org.opendaylight.yang.gen.v1.http.org.openroadm.resource.types.rev161014.ResourceTypeEnum;
53 import org.opendaylight.yang.gen.v1.http.org.transportpce.common.types.rev170907.olm.get.pm.input.ResourceIdentifierBuilder;
54 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.rev150608.Network;
55 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.rev150608.NetworkId;
56 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.rev150608.NetworkKey;
57 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.rev150608.NodeId;
58 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.rev150608.network.Node;
59 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.rev150608.network.NodeKey;
60 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.rev150608.network.node.SupportingNode;
61 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.topology.rev150608.LinkId;
62 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.topology.rev150608.Network1;
63 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.topology.rev150608.network.Link;
64 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.CalculateSpanlossBaseInput;
65 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.CalculateSpanlossBaseOutput;
66 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.CalculateSpanlossBaseOutputBuilder;
67 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.CalculateSpanlossCurrentInput;
68 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.CalculateSpanlossCurrentOutput;
69 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.CalculateSpanlossCurrentOutputBuilder;
70 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.GetPmInput;
71 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.GetPmInputBuilder;
72 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.GetPmOutput;
73 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.GetPmOutputBuilder;
74 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.ServicePowerResetInput;
75 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.ServicePowerResetOutput;
76 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.ServicePowerSetupInput;
77 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.ServicePowerSetupOutput;
78 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.ServicePowerSetupOutputBuilder;
79 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.ServicePowerTurndownInput;
80 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.ServicePowerTurndownOutput;
81 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.ServicePowerTurndownOutputBuilder;
82 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.calculate.spanloss.base.output.Spans;
83 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.calculate.spanloss.base.output.SpansBuilder;
84 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.olm.rev170418.get.pm.output.Measurements;
85 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.portmapping.rev170228.network.nodes.Mapping;
86 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
87 import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
88 import org.slf4j.Logger;
89 import org.slf4j.LoggerFactory;
91 public class OlmPowerServiceImpl implements OlmPowerService {
92 private static final Logger LOG = LoggerFactory.getLogger(OlmPowerServiceImpl.class);
93 private static final String SUCCESS = "Success";
94 private static final String FAILED = "Failed";
95 private final DataBroker dataBroker;
96 private final PowerMgmt powerMgmt;
97 private final DeviceTransactionManager deviceTransactionManager;
98 private final PortMapping portMapping;
100 public OlmPowerServiceImpl(DataBroker dataBroker, PowerMgmt powerMgmt,
101 DeviceTransactionManager deviceTransactionManager, PortMapping portMapping) {
102 this.dataBroker = dataBroker;
103 this.powerMgmt = powerMgmt;
104 this.portMapping = portMapping;
105 this.deviceTransactionManager = deviceTransactionManager;
109 LOG.info("init ...");
112 public void close() {
113 LOG.info("close ...");
117 public GetPmOutput getPm(GetPmInput pmInput) {
118 GetPmOutputBuilder pmOutputBuilder = OlmUtils.pmFetch(pmInput, this.deviceTransactionManager);
119 return pmOutputBuilder.build();
123 public ServicePowerSetupOutput servicePowerSetup(ServicePowerSetupInput powerSetupInput) {
124 ServicePowerSetupOutputBuilder powerSetupOutput = new ServicePowerSetupOutputBuilder();
125 boolean successValPowerCalculation = this.powerMgmt.setPower(powerSetupInput);
127 if (successValPowerCalculation) {
128 powerSetupOutput.setResult(SUCCESS);
130 powerSetupOutput.setResult(FAILED);
132 return powerSetupOutput.build();
136 public ServicePowerTurndownOutput servicePowerTurndown(
137 ServicePowerTurndownInput powerTurndownInput) {
139 ServicePowerTurndownOutputBuilder powerTurnDownOutput = new ServicePowerTurndownOutputBuilder();
140 // TODO add flag or return failure instead of string
141 if (this.powerMgmt.powerTurnDown(powerTurndownInput)) {
142 powerTurnDownOutput.setResult(SUCCESS);
144 powerTurnDownOutput.setResult(FAILED);
146 return powerTurnDownOutput.build();
150 public CalculateSpanlossBaseOutput calculateSpanlossBase(CalculateSpanlossBaseInput spanlossBaseInput) {
152 LOG.info("CalculateSpanlossBase Request received for source type {}", spanlossBaseInput.getSrcType());
154 List<Link> networkLinks = getNetworkLinks();
155 if (networkLinks.isEmpty()) {
156 LOG.warn("Failed to get links form {} topology.", NetworkUtils.OVERLAY_NETWORK_ID);
157 return new CalculateSpanlossBaseOutputBuilder().setResult(FAILED).build();
160 if (!CalculateSpanlossBaseInput.SrcType.All.equals(spanlossBaseInput.getSrcType())) {
161 networkLinks = networkLinks.stream()
162 .filter(link -> link.getLinkId().equals(spanlossBaseInput.getLinkId()))
163 .collect(Collectors.toList());
166 List<Link> roadmLinks = new ArrayList<>();
167 for (Link link : networkLinks) {
168 Link1 roadmLinkAugmentation = link.augmentation(Link1.class);
169 if (roadmLinkAugmentation == null) {
170 LOG.debug("Missing OpenRoadm link augmentation in link {} from {} topology.",
171 link.getLinkId().getValue(), NetworkUtils.OVERLAY_NETWORK_ID);
174 if (OpenroadmLinkType.ROADMTOROADM.equals(roadmLinkAugmentation.getLinkType())) {
175 roadmLinks.add(link);
179 if (roadmLinks.isEmpty()) {
180 LOG.warn("Topology {} does not have any Roadm-to-Roadm links.", NetworkUtils.OVERLAY_NETWORK_ID);
181 return new CalculateSpanlossBaseOutputBuilder().setResult(FAILED).build();
184 Map<LinkId, BigDecimal> spanLossResult = getLinkSpanloss(roadmLinks);
185 CalculateSpanlossBaseOutputBuilder spanLossBaseBuilder = new CalculateSpanlossBaseOutputBuilder();
187 if (spanLossResult != null && !spanLossResult.isEmpty()) {
188 spanLossBaseBuilder.setResult(SUCCESS);
189 List<Spans> listSpans = new ArrayList<>();
190 Set<Entry<LinkId, BigDecimal>> spanLossResultSet = spanLossResult.entrySet();
191 for (Entry<LinkId, BigDecimal> entry : spanLossResultSet) {
192 Spans span = new SpansBuilder().setLinkId(entry.getKey()).setSpanloss(entry.getValue().toString())
196 spanLossBaseBuilder.setSpans(listSpans);
197 return spanLossBaseBuilder.build();
199 LOG.warn("Spanloss calculation failed");
200 spanLossBaseBuilder.setResult(FAILED);
201 return spanLossBaseBuilder.build();
207 public CalculateSpanlossCurrentOutput calculateSpanlossCurrent(CalculateSpanlossCurrentInput input) {
208 LOG.info("calculateSpanlossCurrent Request received for all links in network model.");
209 List<Link> networkLinks = getNetworkLinks();
210 if (networkLinks.isEmpty()) {
211 LOG.warn("Failed to get links form {} topology.", NetworkUtils.OVERLAY_NETWORK_ID);
214 List<Link> roadmLinks = new ArrayList<>();
215 for (Link link : networkLinks) {
216 Link1 roadmLinkAugmentation = link.augmentation(Link1.class);
217 if (roadmLinkAugmentation == null) {
218 LOG.debug("Missing OpenRoadm link augmentation in link {} from {} topology.",
219 link.getLinkId().getValue(), NetworkUtils.OVERLAY_NETWORK_ID);
222 if (OpenroadmLinkType.ROADMTOROADM.equals(roadmLinkAugmentation.getLinkType())) {
223 // Only calculate spanloss for Roadm-to-Roadm links
224 roadmLinks.add(link);
228 if (roadmLinks.isEmpty()) {
229 LOG.warn("Topology {} does not have any Roadm-to-Roadm links.", NetworkUtils.OVERLAY_NETWORK_ID);
233 Map<LinkId, BigDecimal> spanLossResult = getLinkSpanloss(roadmLinks);
234 CalculateSpanlossCurrentOutputBuilder spanLossCurrentBuilder = new CalculateSpanlossCurrentOutputBuilder();
235 if (spanLossResult != null && !spanLossResult.isEmpty()) {
236 spanLossCurrentBuilder.setResult(SUCCESS);
237 return spanLossCurrentBuilder.build();
239 LOG.error("Spanloss Current calculation failed");
240 spanLossCurrentBuilder.setResult(FAILED);
241 return spanLossCurrentBuilder.build();
246 public ServicePowerResetOutput servicePowerReset(ServicePowerResetInput input) {
251 private List<Link> getNetworkLinks() {
252 NetworkKey overlayTopologyKey = new NetworkKey(new NetworkId(NetworkUtils.OVERLAY_NETWORK_ID));
254 InstanceIdentifier<Network1> networkIID = InstanceIdentifier.builder(Network.class, overlayTopologyKey)
255 .augmentation(Network1.class)
257 Optional<Network1> networkOptional;
258 try (ReadOnlyTransaction rtx = this.dataBroker.newReadOnlyTransaction()) {
259 // TODO change to constant from Timeouts class when it will be
261 networkOptional = rtx.read(LogicalDatastoreType.CONFIGURATION, networkIID).get(Timeouts.DATASTORE_READ,
262 TimeUnit.MILLISECONDS).toJavaUtil();
263 } catch (InterruptedException | ExecutionException | TimeoutException e) {
264 LOG.warn("Read of {} topology failed", NetworkUtils.OVERLAY_NETWORK_ID);
265 return Collections.emptyList();
268 if (!networkOptional.isPresent()) {
269 LOG.warn("Network augmentation with links data is not present in {} topology.",
270 NetworkUtils.OVERLAY_NETWORK_ID);
271 return Collections.emptyList();
274 List<Link> networkLinks = networkOptional.get().getLink();
275 if ((networkLinks == null) || networkLinks.isEmpty()) {
276 LOG.warn("Links are not present in {} topology.", NetworkUtils.OVERLAY_NETWORK_ID);
277 return Collections.emptyList();
283 * This method retrieves OTS PM from current PM list by nodeId and TPId:
287 * 1. Get OTS interface name from port mapping by TPId 2. Call getPm RPC to
295 * Termination point Name.
297 * PM name which need to be retrieved
298 * @return reference to OtsPmHolder
300 private OtsPmHolder getPmMeasurements(String nodeId, String tpID, String pmName) {
301 String realNodeId = getRealNodeId(nodeId);
302 Mapping mapping = this.portMapping.getMapping(realNodeId, tpID);
303 if (mapping == null) {
306 GetPmInput getPmInput = new GetPmInputBuilder().setNodeId(realNodeId)
307 .setResourceType(ResourceTypeEnum.Interface).setGranularity(PmGranularity._15min)
308 .setResourceIdentifier(
309 new ResourceIdentifierBuilder().setResourceName(mapping.getSupportingOts()).build())
311 GetPmOutput otsPmOutput = getPm(getPmInput);
313 if (otsPmOutput == null) {
314 LOG.info("OTS PM not found for NodeId: {} TP Id:{} PMName:{}", realNodeId, tpID, pmName);
318 for (Measurements measurement : otsPmOutput.getMeasurements()) {
319 if (pmName.equals(measurement.getPmparameterName())) {
320 return new OtsPmHolder(pmName, Double.parseDouble(measurement.getPmparameterValue()),
321 mapping.getSupportingOts());
324 } catch (NumberFormatException e) {
325 LOG.warn("Unable to get PM for NodeId: {} TP Id:{} PMName:{}", realNodeId, tpID, pmName, e);
331 * This method Sets Spanloss on A-End and Z-End OTS interface: Steps:
334 * 1. Read existing interface details
340 * nodeId of NE on which spanloss need to be updated
341 * @param interfaceName
342 * OTS interface for NE on which spanloss is cacluated
344 * calculated spanloss value
346 * for which spanloss is calculated.It can be either Tx or Rx
349 private boolean setSpanLoss(String nodeId, String interfaceName, BigDecimal spanLoss, String direction) {
350 String realNodeId = getRealNodeId(nodeId);
353 LOG.info("Setting 'span-loss-transmit' in device: {}, Interface: {}", realNodeId, interfaceName);
356 LOG.info("Setting 'span-loss-receive' in device: {}, Interface: {}", realNodeId, interfaceName);
359 LOG.error("Impossible to set spanloss in device: {}, Interface: {}", realNodeId, interfaceName);
362 InstanceIdentifier<Interface> interfacesIID = InstanceIdentifier.create(OrgOpenroadmDevice.class)
363 .child(Interface.class, new InterfaceKey(interfaceName));
364 com.google.common.base.Optional<Interface> interfaceObject;
366 Future<Optional<DeviceTransaction>> deviceTxFuture =
367 this.deviceTransactionManager.getDeviceTransaction(realNodeId);
368 java.util.Optional<DeviceTransaction> deviceTxOpt = deviceTxFuture.get();
369 DeviceTransaction deviceTx;
370 if (deviceTxOpt.isPresent()) {
371 deviceTx = deviceTxOpt.get();
373 LOG.error("Device transaction for device {} was not found!", nodeId);
376 interfaceObject = deviceTx.read(LogicalDatastoreType.CONFIGURATION, interfacesIID).get();
377 BigDecimal initialSpanloss = new BigDecimal(0);
378 RatioDB spanLossRx = new RatioDB(initialSpanloss);
379 RatioDB spanLossTx = new RatioDB(initialSpanloss);
380 if (interfaceObject.isPresent()) {
381 Interface intf = interfaceObject.get();
382 InterfaceBuilder interfaceBuilder = new InterfaceBuilder(intf);
383 OtsBuilder otsBuilder = new OtsBuilder();
384 if ((intf.augmentation(Interface1.class) != null)
385 && (intf.augmentation(Interface1.class).getOts() != null)) {
386 Ots ots = intf.augmentation(Interface1.class).getOts();
387 otsBuilder.setFiberType(ots.getFiberType());
388 spanLossRx = ots.getSpanLossReceive();
389 spanLossTx = ots.getSpanLossTransmit();
391 spanLossRx = new RatioDB(spanLoss);
392 spanLossTx = new RatioDB(spanLoss);
394 Interface1Builder intf1Builder = new Interface1Builder();
395 if (direction.equals("TX")) {
396 otsBuilder.setSpanLossTransmit(new RatioDB(spanLoss));
397 otsBuilder.setSpanLossReceive(spanLossRx);
399 otsBuilder.setSpanLossTransmit(spanLossTx).setSpanLossReceive(new RatioDB(spanLoss));
401 interfaceBuilder.addAugmentation(Interface1.class, intf1Builder.setOts(otsBuilder.build()).build());
402 deviceTx.put(LogicalDatastoreType.CONFIGURATION, interfacesIID, interfaceBuilder.build());
403 ListenableFuture<Void> submit =
404 deviceTx.submit(Timeouts.DEVICE_WRITE_TIMEOUT, Timeouts.DEVICE_WRITE_TIMEOUT_UNIT);
406 LOG.info("Spanloss Value update completed successfully");
409 } catch (InterruptedException | ExecutionException e) {
410 LOG.warn("Unable to set spanloss", e);
416 * This method calculates Spanloss by TranmistPower - Receive Power Steps:
419 * 1. Read PM measurement
422 * 2. Set Spanloss value for interface
425 * reference to list of RoadmLinks
426 * @return map with list of spans with their spanloss value
428 private Map<LinkId, BigDecimal> getLinkSpanloss(List<Link> roadmLinks) {
429 Map<LinkId, BigDecimal> map = new HashMap<LinkId, BigDecimal>();
430 LOG.info("Executing GetLinkSpanLoss");
431 BigDecimal spanLoss = new BigDecimal(0);
432 for (Link link : roadmLinks) {
433 String sourceNodeId = link.getSource().getSourceNode().getValue();
434 String sourceTpId = link.getSource().getSourceTp().toString();
435 String destNodeId = link.getDestination().getDestNode().getValue();
436 String destTpId = link.getDestination().getDestTp().toString();
437 OtsPmHolder srcOtsPmHoler = getPmMeasurements(sourceNodeId, sourceTpId, "OpticalPowerOutput");
438 OtsPmHolder destOtsPmHoler = getPmMeasurements(destNodeId, destTpId, "OpticalPowerInput");
439 spanLoss = new BigDecimal(srcOtsPmHoler.getOtsParameterVal() - destOtsPmHoler.getOtsParameterVal())
440 .setScale(0, RoundingMode.HALF_UP);
441 LOG.info("Spanloss Calculated as :" + spanLoss + "=" + srcOtsPmHoler.getOtsParameterVal() + "-"
442 + destOtsPmHoler.getOtsParameterVal());
443 if ((spanLoss.doubleValue() < 28) && (spanLoss.doubleValue() > 0)) {
444 if (!setSpanLoss(sourceNodeId, srcOtsPmHoler.getOtsInterfaceName(), spanLoss, "TX")) {
445 LOG.info("Setting spanLoss failed for " + sourceNodeId);
448 if (!setSpanLoss(destNodeId, destOtsPmHoler.getOtsInterfaceName(), spanLoss, "RX")) {
449 LOG.info("Setting spanLoss failed for " + destNodeId);
452 map.put(link.getLinkId(), spanLoss);
458 private String getRealNodeId(String mappedNodeId) {
459 KeyedInstanceIdentifier<Node, NodeKey> mappedNodeII =
460 InstanceIdentifiers.OVERLAY_NETWORK_II.child(Node.class, new NodeKey(new NodeId(mappedNodeId)));
461 com.google.common.base.Optional<Node> realNode;
462 try (ReadOnlyTransaction readOnlyTransaction = this.dataBroker.newReadOnlyTransaction()) {
463 realNode = readOnlyTransaction.read(LogicalDatastoreType.CONFIGURATION, mappedNodeII).get();
464 } catch (InterruptedException | ExecutionException e) {
465 LOG.error(e.getMessage(), e);
466 throw new IllegalStateException(e);
468 if (!realNode.isPresent() || (realNode.get().getSupportingNode() == null)) {
469 throw new IllegalArgumentException(
470 String.format("Could not find node %s, or supporting node is not present", mappedNodeId));
472 List<SupportingNode> collect = realNode.get().getSupportingNode().stream()
473 .filter(node -> (node.getNetworkRef() != null)
474 && NetworkUtils.UNDERLAY_NETWORK_ID.equals(node.getNetworkRef().getValue())
475 && (node.getNodeRef() != null) && !Strings.isNullOrEmpty(node.getNodeRef().getValue()))
476 .collect(Collectors.toList());
477 if (collect.isEmpty() || (collect.size() > 1)) {
478 throw new IllegalArgumentException(String.format("Invalid support node count [%d] was found for node %s",
479 collect.size(), mappedNodeId));
481 return collect.iterator().next().getNodeRef().getValue();