pce/src/main/java/org/opendaylight/transportpce/pce/gnpy/GnpyResult.java

   1 /*
   2  * Copyright © 2018 Orange, 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
   9 package org.opendaylight.transportpce.pce.gnpy;
  10
  11 //import com.google.common.base.Preconditions;
  12 import com.google.gson.stream.JsonReader;
  13
  14 import java.io.ByteArrayInputStream;
  15 import java.io.IOException;
  16 import java.io.InputStream;
  17 import java.io.InputStreamReader;
  18 import java.math.BigDecimal;
  19 import java.nio.charset.StandardCharsets;
  20 import java.util.ArrayList;
  21 import java.util.Collections;
  22 import java.util.HashMap;
  23 import java.util.Iterator;
  24 import java.util.List;
  25 import java.util.Map;
  26 import java.util.Map.Entry;
  27 import java.util.Optional;
  28
  29 import javax.annotation.Nonnull;
  30
  31 import org.opendaylight.mdsal.binding.dom.codec.api.BindingNormalizedNodeSerializer;
  32 import org.opendaylight.mdsal.binding.dom.codec.impl.BindingNormalizedNodeCodecRegistry;
  33 import org.opendaylight.mdsal.binding.generator.impl.ModuleInfoBackedContext;
  34 import org.opendaylight.mdsal.binding.generator.util.BindingRuntimeContext;
  35 import org.opendaylight.mdsal.binding.spec.reflect.BindingReflections;
  36 import org.opendaylight.yang.gen.v1.gnpy.path.rev200202.Result;
  37 import org.opendaylight.yang.gen.v1.gnpy.path.rev200202.explicit.route.hop.type.NumUnnumHop;
  38 import org.opendaylight.yang.gen.v1.gnpy.path.rev200202.generic.path.properties.path.properties.PathMetric;
  39 import org.opendaylight.yang.gen.v1.gnpy.path.rev200202.generic.path.properties.path.properties.PathRouteObjects;
  40 import org.opendaylight.yang.gen.v1.gnpy.path.rev200202.result.Response;
  41 import org.opendaylight.yang.gen.v1.gnpy.path.rev200202.result.response.response.type.NoPathCase;
  42 import org.opendaylight.yang.gen.v1.gnpy.path.rev200202.result.response.response.type.PathCase;
  43 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.routing.constraints.rev171017.constraints.sp.co.routing.or.general.General;
  44 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.routing.constraints.rev171017.constraints.sp.co.routing.or.general.GeneralBuilder;
  45 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.routing.constraints.rev171017.constraints.sp.co.routing.or.general.general.Include;
  46 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.routing.constraints.rev171017.constraints.sp.co.routing.or.general.general.IncludeBuilder;
  47 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.routing.constraints.rev171017.constraints.sp.co.routing.or.general.general.include_.OrderedHops;
  48 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.routing.constraints.rev171017.constraints.sp.co.routing.or.general.general.include_.OrderedHopsBuilder;
  49 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.routing.constraints.rev171017.ordered.constraints.sp.HopType;
  50 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.routing.constraints.rev171017.ordered.constraints.sp.HopTypeBuilder;
  51 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.routing.constraints.rev171017.ordered.constraints.sp.hop.type.hop.type.NodeBuilder;
  52 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.routing.constraints.rev171017.routing.constraints.sp.HardConstraints;
  53 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.routing.constraints.rev171017.routing.constraints.sp.HardConstraintsBuilder;
  54 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
  55 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Address;
  56 import org.opendaylight.yangtools.yang.binding.DataObject;
  57 import org.opendaylight.yangtools.yang.binding.YangModuleInfo;
  58 import org.opendaylight.yangtools.yang.common.QName;
  59 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  60 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  61 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  62 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  63 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodes;
  64 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
  65 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactorySupplier;
  66 import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
  67 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
  68 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
  69 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  70 import org.slf4j.Logger;
  71 import org.slf4j.LoggerFactory;
  72
  73 /**
  74  * Class for analyzing the result sent by GNPy.
  75  *
  76  * @author Ahmed Triki ( ahmed.triki@orange.com )
  77  *
  78  */
  79
  80 public class GnpyResult {
  81
  82     private static final Logger LOG = LoggerFactory.getLogger(GnpyResult.class);
  83     private Response response = null;
  84     private Map<String, IpAddress> mapNodeRefIp = new HashMap<>();
  85
  86     public GnpyResult(String gnpyResponseString, GnpyTopoImpl gnpyTopo) throws GnpyException, Exception {
  87         this.mapNodeRefIp = gnpyTopo.getMapNodeRefIp();
  88         // Create the schema context
  89         final ModuleInfoBackedContext moduleContext = ModuleInfoBackedContext.create();
  90         Iterable<? extends YangModuleInfo> moduleInfos;
  91
  92         moduleInfos = Collections.singleton(BindingReflections.getModuleInfo(Result.class));
  93         moduleContext.addModuleInfos(moduleInfos);
  94         SchemaContext schemaContext = moduleContext.tryToCreateSchemaContext().get();
  95
  96         // Create the binding binding normalized node codec registry
  97         BindingRuntimeContext bindingRuntimeContext = BindingRuntimeContext.create(moduleContext, schemaContext);
  98         final BindingNormalizedNodeCodecRegistry codecRegistry =
  99             new BindingNormalizedNodeCodecRegistry(bindingRuntimeContext);
 100
 101         // Create the data object
 102         QName pathQname = QName.create("gnpy:path", "2020-02-02", "result");
 103         LOG.debug("the Qname is {} / namesapce {} ; module {}; ", pathQname, pathQname.getNamespace(),
 104             pathQname.getModule());
 105         YangInstanceIdentifier yangId = YangInstanceIdentifier.of(pathQname);
 106         DataObject dataObject = null;
 107
 108         // Create the object response
 109         InputStream streamGnpyRespnse = new ByteArrayInputStream(gnpyResponseString.getBytes(StandardCharsets.UTF_8));
 110         InputStreamReader gnpyResultReader = new InputStreamReader(streamGnpyRespnse,StandardCharsets.UTF_8);
 111         JsonReader jsonReader = new JsonReader(gnpyResultReader);
 112         Optional<NormalizedNode<? extends PathArgument, ?>> transformIntoNormalizedNode = parseInputJSON(jsonReader,
 113             Result.class);
 114         if (!transformIntoNormalizedNode.isPresent()) {
 115             throw new GnpyException("In GnpyResult: the Normalized Node is not present");
 116         }
 117         NormalizedNode<? extends PathArgument, ?> normalizedNode = transformIntoNormalizedNode.get();
 118
 119         if (codecRegistry.fromNormalizedNode(yangId, normalizedNode) != null) {
 120             dataObject = codecRegistry.fromNormalizedNode(yangId, normalizedNode).getValue();
 121         } else {
 122             throw new GnpyException("In GnpyResult: the codec registry from the normalized node is null");
 123         }
 124         List<Response> responses = null;
 125         responses = ((Result) dataObject).getResponse();
 126         if (responses == null) {
 127             throw new GnpyException("In GnpyResult: the response from GNpy is null!");
 128         }
 129         LOG.info("The response id is {}; ", responses.get(0).getResponseId());
 130         this.response = responses.get(0);
 131         analyzeResult();
 132     }
 133
 134     public boolean getPathFeasibility() {
 135         boolean isFeasible = false;
 136         if (response != null) {
 137             if (response.getResponseType() instanceof NoPathCase) {
 138                 LOG.info("In GnpyResult: The path is not feasible ");
 139             } else if (response.getResponseType() instanceof PathCase) {
 140                 isFeasible = true;
 141                 LOG.info("In GnpyResult: The path is feasible ");
 142             }
 143         }
 144         return isFeasible;
 145     }
 146
 147     public List<PathRouteObjects> analyzeResult() {
 148         List<PathRouteObjects> pathRouteObjectList = null;
 149         if (response != null) {
 150             if (response.getResponseType() instanceof NoPathCase) {
 151                 NoPathCase noPathCase = (NoPathCase) response.getResponseType();
 152                 String noPathType = noPathCase.getNoPath().getNoPath();
 153                 LOG.info("GNPy: No path - {}", noPathType);
 154                 if (((noPathType.equals("NO_FEASIBLE_BAUDRATE_WITH_SPACING"))
 155                     && (noPathType.equals("NO_FEASIBLE_MODE"))) && ((noPathType.equals("MODE_NOT_FEASIBLE"))
 156                         && (noPathType.equals("NO_SPECTRUM")))) {
 157                     List<PathMetric> pathMetricList = noPathCase.getNoPath().getPathProperties().getPathMetric();
 158                     LOG.info("GNPy : path is not feasible : {}", noPathType);
 159                     for (PathMetric pathMetric : pathMetricList) {
 160                         String metricType = pathMetric.getMetricType().getSimpleName();
 161                         BigDecimal accumulativeValue = pathMetric.getAccumulativeValue();
 162                         LOG.info("Metric type {} // AccumulatriveValue {}", metricType, accumulativeValue);
 163                     }
 164                 }
 165             } else if (response.getResponseType() instanceof PathCase) {
 166                 LOG.info("GNPy : path is feasible");
 167                 PathCase pathCase = (PathCase) response.getResponseType();
 168                 List<PathMetric> pathMetricList = pathCase.getPathProperties().getPathMetric();
 169                 // Path metrics
 170                 for (PathMetric pathMetric : pathMetricList) {
 171                     String metricType = pathMetric.getMetricType().getSimpleName();
 172                     BigDecimal accumulativeValue = pathMetric.getAccumulativeValue();
 173                     LOG.info("Metric type {} // AccumulatriveValue {}", metricType, accumulativeValue);
 174                 }
 175                 // Path route objects
 176                 pathRouteObjectList = pathCase.getPathProperties().getPathRouteObjects();
 177                 LOG.info("in GnpyResult: finishing the computation of pathRouteObjectList");
 178             }
 179         }
 180         return pathRouteObjectList;
 181     }
 182
 183     public HardConstraints computeHardConstraintsFromGnpyPath(List<PathRouteObjects> pathRouteObjectList) {
 184         HardConstraints hardConstraints = null;
 185         // Includes the list of nodes in the GNPy computed path as constraints
 186         // for the PCE
 187         List<OrderedHops> orderedHopsList = new ArrayList<>();
 188         int counter = 0;
 189         for (PathRouteObjects pathRouteObjects : pathRouteObjectList) {
 190             if (pathRouteObjects.getPathRouteObject().getType() instanceof NumUnnumHop) {
 191                 NumUnnumHop numUnnumHop = (org.opendaylight.yang.gen.v1.gnpy.path.rev200202.explicit.route.hop.type
 192                     .NumUnnumHop) pathRouteObjects.getPathRouteObject().getType();
 193                 String nodeIp = numUnnumHop.getNumUnnumHop().getNodeId();
 194                 try {
 195                     IpAddress nodeIpAddress = new IpAddress(new Ipv4Address(nodeIp));
 196                     // find the corresponding node-id (in ord-ntw) corresponding to nodeId (in gnpy response)
 197                     String nodeId = findOrdNetworkNodeId(nodeIpAddress);
 198                     if (nodeId != null) {
 199                         org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.routing.constraints.rev171017
 200                             .ordered.constraints.sp.hop.type.hop.type.Node node = new NodeBuilder().setNodeId(nodeId)
 201                             .build();
 202                         HopType hopType = new HopTypeBuilder().setHopType(node).build();
 203                         OrderedHops orderedHops = new OrderedHopsBuilder().setHopNumber(counter).setHopType(hopType)
 204                             .build();
 205                         orderedHopsList.add(orderedHops);
 206                         counter++;
 207                     }
 208                 } catch (IllegalArgumentException e) {
 209                     LOG.debug(" in GnpyResult: the element {} is not a ipv4Address ", nodeIp);
 210                 }
 211             }
 212         }
 213         Include include = new IncludeBuilder().setOrderedHops(orderedHopsList).build();
 214         General general = new GeneralBuilder().setInclude(include).build();
 215         hardConstraints = new HardConstraintsBuilder().setCoRoutingOrGeneral(general).build();
 216         return hardConstraints;
 217     }
 218
 219     private String findOrdNetworkNodeId(IpAddress nodeIpAddress) {
 220         Iterator<Map.Entry<String,IpAddress>> it = this.mapNodeRefIp.entrySet().iterator();
 221         while (it.hasNext()) {
 222             Entry<String, IpAddress> entry = it.next();
 223             if (entry.getValue().equals(nodeIpAddress)) {
 224                 return entry.getKey();
 225             }
 226         }
 227         return null;
 228     }
 229
 230     /**
 231      * Parses the input json with concrete implementation of {@link JsonParserStream}.
 232      * @param reader of the given JSON
 233      * @throws Exception exception
 234      */
 235     private Optional<NormalizedNode<? extends YangInstanceIdentifier.PathArgument, ?>> parseInputJSON(JsonReader reader,
 236         Class<? extends DataObject> objectClass) throws Exception {
 237         NormalizedNodeResult result = new NormalizedNodeResult();
 238         SchemaContext schemaContext = getSchemaContext(objectClass);
 239         try (NormalizedNodeStreamWriter streamWriter = ImmutableNormalizedNodeStreamWriter.from(result);
 240             JsonParserStream jsonParser = JsonParserStream.create(streamWriter,
 241                 JSONCodecFactorySupplier.DRAFT_LHOTKA_NETMOD_YANG_JSON_02.getShared(schemaContext),
 242                 schemaContext);) {
 243             jsonParser.parse(reader);
 244         } catch (IOException e) {
 245             LOG.warn("GNPy: exception {} occured during parsing Json input stream", e.getMessage());
 246             return Optional.empty();
 247         }
 248         return Optional.ofNullable(result.getResult());
 249     }
 250
 251     private SchemaContext getSchemaContext(Class<? extends DataObject> objectClass) throws GnpyException, Exception {
 252
 253         final ModuleInfoBackedContext moduleContext = ModuleInfoBackedContext.create();
 254         Iterable<? extends YangModuleInfo> moduleInfos;
 255         SchemaContext schemaContext = null;
 256         moduleInfos = Collections.singleton(BindingReflections.getModuleInfo(objectClass));
 257         moduleContext.addModuleInfos(moduleInfos);
 258         schemaContext = moduleContext.tryToCreateSchemaContext().get();
 259         return schemaContext;
 260     }
 261
 262     /**
 263      * Transforms the given input {@link NormalizedNode} into the given {@link DataObject}.
 264      *
 265      * @param <T> a generic
 266      * @param normalizedNode a non null representation of the normalizedNode
 267      * @param rootNode root node
 268      * @param codecRegistry codec registry
 269      * @return value of the binding Node Entry
 270      */
 271     @SuppressWarnings("unchecked")
 272     public <T extends DataObject> Optional<T> getDataObject(@Nonnull NormalizedNode<?, ?> normalizedNode,
 273         @Nonnull QName rootNode, BindingNormalizedNodeSerializer codecRegistry) {
 274         if (normalizedNode != null) {
 275             LOG.debug("GNPy: The codecRegistry is {}", codecRegistry);
 276         } else {
 277             LOG.warn("GNPy: The codecRegistry is null");
 278         }
 279         //Preconditions.checkNotNull(normalizedNode);
 280         if (normalizedNode instanceof ContainerNode) {
 281             YangInstanceIdentifier.PathArgument directChildIdentifier = YangInstanceIdentifier.of(rootNode)
 282                 .getLastPathArgument();
 283             Optional<NormalizedNode<?, ?>> directChild = NormalizedNodes.getDirectChild(normalizedNode,
 284                 directChildIdentifier);
 285             if (!directChild.isPresent()) {
 286                 throw new IllegalStateException(String.format("Could not get the direct child of %s", rootNode));
 287             }
 288             normalizedNode = directChild.get();
 289             LOG.debug("GNPy: the normalized node is {}", normalizedNode.getNodeType());
 290         }
 291         YangInstanceIdentifier rootNodeYangInstanceIdentifier = YangInstanceIdentifier.of(rootNode);
 292         LOG.debug("GNPy: the root Node Yang Instance Identifier is {}", rootNodeYangInstanceIdentifier);
 293         Map.Entry<?, ?> bindingNodeEntry = codecRegistry.fromNormalizedNode(rootNodeYangInstanceIdentifier,
 294             normalizedNode);
 295         if (bindingNodeEntry == null) {
 296             LOG.debug("The binding Node Entry is null");
 297             return Optional.empty();
 298         }
 299         return Optional.ofNullable((T) bindingNodeEntry.getValue());
 300     }
 301
 302     public Response getResponse() {
 303         return response;
 304     }
 305 }