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.Collections;
  21 import java.util.List;
  22 import java.util.Map;
  23 import java.util.Optional;
  24
  25 import javassist.ClassPool;
  26
  27 import javax.annotation.Nonnull;
  28
  29 import org.opendaylight.mdsal.binding.dom.codec.api.BindingNormalizedNodeSerializer;
  30 import org.opendaylight.mdsal.binding.dom.codec.gen.impl.StreamWriterGenerator;
  31 import org.opendaylight.mdsal.binding.dom.codec.impl.BindingNormalizedNodeCodecRegistry;
  32 import org.opendaylight.mdsal.binding.generator.impl.ModuleInfoBackedContext;
  33 import org.opendaylight.mdsal.binding.generator.util.BindingRuntimeContext;
  34 import org.opendaylight.mdsal.binding.generator.util.JavassistUtils;
  35 import org.opendaylight.mdsal.binding.spec.reflect.BindingReflections;
  36 import org.opendaylight.yang.gen.v1.gnpy.path.rev190502.Result;
  37 import org.opendaylight.yang.gen.v1.gnpy.path.rev190502.explicit.route.hop.type.num.unnum.hop.NumUnnumHop;
  38 import org.opendaylight.yang.gen.v1.gnpy.path.rev190502.generic.path.properties.path.properties.PathMetric;
  39 import org.opendaylight.yang.gen.v1.gnpy.path.rev190502.generic.path.properties.path.properties.PathRouteObjects;
  40 import org.opendaylight.yang.gen.v1.gnpy.path.rev190502.result.Response;
  41 import org.opendaylight.yang.gen.v1.gnpy.path.rev190502.result.response.response.type.NoPathCase;
  42 import org.opendaylight.yang.gen.v1.gnpy.path.rev190502.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.yangtools.yang.binding.DataObject;
  55 import org.opendaylight.yangtools.yang.binding.YangModuleInfo;
  56 import org.opendaylight.yangtools.yang.common.QName;
  57 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  58 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  59 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  60 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  61 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodes;
  62 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
  63 import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
  64 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
  65 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
  66 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  67
  68 import org.slf4j.Logger;
  69 import org.slf4j.LoggerFactory;
  70
  71 /**
  72  * Class for analyzing the result sent by GNPy.
  73  *
  74  * @author Ahmed Triki ( ahmed.triki@orange.com )
  75  *
  76  */
  77
  78 public class GnpyResult {
  79
  80     private static final Logger LOG = LoggerFactory.getLogger(GnpyResult.class);
  81     private Response response = null;
  82
  83     public GnpyResult(String gnpyResponseString) throws Exception {
  84
  85         // Create the schema context
  86         final ModuleInfoBackedContext moduleContext = ModuleInfoBackedContext.create();
  87         Iterable<? extends YangModuleInfo> moduleInfos;
  88         moduleInfos = Collections.singleton(BindingReflections.getModuleInfo(Result.class));
  89         moduleContext.addModuleInfos(moduleInfos);
  90         SchemaContext schemaContext = moduleContext.tryToCreateSchemaContext().get();
  91
  92         // Create the binding binding normalized node codec registry
  93         BindingRuntimeContext bindingRuntimeContext = BindingRuntimeContext.create(moduleContext, schemaContext);
  94         final BindingNormalizedNodeCodecRegistry codecRegistry = new BindingNormalizedNodeCodecRegistry(
  95                 StreamWriterGenerator.create(JavassistUtils.forClassPool(ClassPool.getDefault())));
  96         codecRegistry.onBindingRuntimeContextUpdated(bindingRuntimeContext);
  97
  98         // Create the data object
  99         QName pathQname = QName.create("gnpy:path", "2019-05-02", "result");
 100         LOG.debug("the Qname is {} / namesapce {} ; module {}; ", pathQname.toString(), pathQname.getNamespace(),
 101                 pathQname.getModule());
 102         YangInstanceIdentifier yangId = YangInstanceIdentifier.of(pathQname);
 103         DataObject dataObject = null;
 104         //Create the object response
 105         //Create JsonReader from String
 106         InputStream streamGnpyRespnse = new ByteArrayInputStream(gnpyResponseString.getBytes(StandardCharsets.UTF_8));
 107         InputStreamReader gnpyResultReader = new InputStreamReader(streamGnpyRespnse);
 108         JsonReader jsonReader = new JsonReader(gnpyResultReader);
 109         Optional<NormalizedNode<? extends PathArgument, ?>> transformIntoNormalizedNode = parseInputJSON(jsonReader,
 110                 Result.class);
 111         NormalizedNode<? extends PathArgument, ?> normalizedNode = transformIntoNormalizedNode.get();
 112         if (codecRegistry.fromNormalizedNode(yangId, normalizedNode) != null) {
 113             LOG.debug("The key of the generated object",
 114                     codecRegistry.fromNormalizedNode(yangId, normalizedNode).getKey());
 115             dataObject = codecRegistry.fromNormalizedNode(yangId, normalizedNode).getValue();
 116         } else {
 117             LOG.warn("The codec registry from the normalized node is null!");
 118         }
 119         List<Response> responses = null;
 120         responses = ((Result) dataObject).getResponse();
 121         if (responses != null) {
 122             LOG.info("The response id is {}; ", responses.get(0).getResponseId());
 123         } else {
 124             LOG.warn("The response is null!");
 125         }
 126         this.response = responses.get(0);
 127         analyzeResult();
 128     }
 129
 130     public boolean getPathFeasibility() {
 131         boolean isFeasible = false;
 132         if (response != null) {
 133             if (response.getResponseType() instanceof NoPathCase) {
 134                 isFeasible = false;
 135                 LOG.info("The path is not feasible ");
 136             } else if (response.getResponseType() instanceof PathCase) {
 137                 isFeasible = true;
 138                 LOG.info("The path is feasible ");
 139             }
 140         }
 141         return isFeasible;
 142     }
 143
 144     public void analyzeResult() {
 145         if (response != null) {
 146             Long responseId = response.getResponseId();
 147             LOG.info("Response-Id {}", responseId);
 148             if (response.getResponseType() instanceof NoPathCase) {
 149                 NoPathCase noPathCase = (NoPathCase) response.getResponseType();
 150                 String noPathType = noPathCase.getNoPath().getNoPath();
 151                 LOG.info("GNPy: No path - {}",noPathType);
 152                 if (((noPathType == "NO_FEASIBLE_BAUDRATE_WITH_SPACING") && (noPathType == "NO_FEASIBLE_MODE"))
 153                         && ((noPathType ==  "MODE_NOT_FEASIBLE") && (noPathType == "NO_SPECTRUM"))) {
 154                     List<PathMetric> pathMetricList = noPathCase.getNoPath().getPathProperties().getPathMetric();
 155                     LOG.info("GNPy : path is not feasible : {}", noPathType);
 156                     for (PathMetric pathMetric : pathMetricList) {
 157                         String metricType = pathMetric.getMetricType().getSimpleName();
 158                         BigDecimal accumulativeValue = pathMetric.getAccumulativeValue();
 159                         LOG.info("Metric type {} // AccumulatriveValue {}", metricType, accumulativeValue);
 160                     }
 161                 }
 162             } else if (response.getResponseType() instanceof PathCase) {
 163                 LOG.info("GNPy : path is feasible");
 164                 PathCase pathCase = (PathCase) response.getResponseType();
 165                 List<PathMetric> pathMetricList = pathCase.getPathProperties().getPathMetric();
 166                 for (PathMetric pathMetric : pathMetricList) {
 167                     String metricType = pathMetric.getMetricType().getSimpleName();
 168                     BigDecimal accumulativeValue = pathMetric.getAccumulativeValue();
 169                     LOG.info("Metric type {} // AccumulatriveValue {}", metricType, accumulativeValue);
 170                 }
 171             }
 172         }
 173     }
 174
 175     public HardConstraints analyzeGnpyPath() {
 176         HardConstraints hardConstraints = null;
 177         if (response != null) {
 178             Long responseId = response.getResponseId();
 179             LOG.info("Response-Id {}", responseId);
 180             if (response.getResponseType() instanceof NoPathCase) {
 181                 NoPathCase noPathCase = (NoPathCase) response.getResponseType();
 182                 LOG.info("No path feasible {}", noPathCase.toString());
 183             } else if (response.getResponseType() instanceof PathCase) {
 184                 PathCase pathCase = (PathCase) response.getResponseType();
 185                 List<PathMetric> pathMetricList = pathCase.getPathProperties().getPathMetric();
 186                 for (PathMetric pathMetric : pathMetricList) {
 187                     String metricType = pathMetric.getMetricType().getSimpleName();
 188                     BigDecimal accumulativeValue = pathMetric.getAccumulativeValue();
 189                     LOG.info("Metric type {} // AccumulatriveValue {}", metricType, accumulativeValue);
 190                 }
 191
 192                 // Includes the list of nodes in the GNPy computed path as constraints for the PCE
 193                 List<OrderedHops> orderedHopsList = null;
 194                 List<PathRouteObjects> pathRouteObjectList = pathCase.getPathProperties().getPathRouteObjects();
 195                 int counter = 0;
 196                 for (PathRouteObjects pathRouteObjects : pathRouteObjectList) {
 197                     if (pathRouteObjects.getPathRouteObject().getType() instanceof NumUnnumHop) {
 198                         NumUnnumHop numUnnumHop = (NumUnnumHop) pathRouteObjects.getPathRouteObject().getType();
 199                         String nodeId = numUnnumHop.getNodeId();
 200                         org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.routing.constraints.rev171017
 201                                 .ordered.constraints.sp.hop.type.hop.type.Node node = new NodeBuilder()
 202                                 .setNodeId(nodeId).build();
 203                         HopType hopType = new HopTypeBuilder().setHopType(node).build();
 204                         OrderedHops orderedHops = new OrderedHopsBuilder().setHopNumber(counter).setHopType(hopType)
 205                                 .build();
 206                         LOG.info("- gnpyResult class : Hard Constraint: {} // - Hop Node {}", counter, nodeId);
 207                         orderedHopsList.add(orderedHops);
 208                         counter++;
 209                     }
 210                 }
 211                 Include include = new IncludeBuilder().setOrderedHops(orderedHopsList).build();
 212                 General general = new GeneralBuilder().setInclude(include).build();
 213                 hardConstraints = new HardConstraintsBuilder().setCoRoutingOrGeneral(general).build();
 214             }
 215         }
 216         return hardConstraints;
 217     }
 218
 219     /**
 220      * Parses the input json with concrete implementation of
 221      * {@link JsonParserStream}.
 222      *
 223      * @param reader
 224      *            of the given JSON
 225      * @throws Exception
 226      *
 227      */
 228     private Optional<NormalizedNode<? extends YangInstanceIdentifier.PathArgument, ?>> parseInputJSON(JsonReader reader,
 229             Class<? extends DataObject> objectClass) throws Exception {
 230         NormalizedNodeResult result = new NormalizedNodeResult();
 231         SchemaContext schemaContext = getSchemaContext(objectClass);
 232         try (NormalizedNodeStreamWriter streamWriter = ImmutableNormalizedNodeStreamWriter.from(result);
 233                 JsonParserStream jsonParser = JsonParserStream.create(streamWriter, schemaContext, schemaContext);) {
 234             LOG.debug("GNPy: the path to the reader {}", reader.getPath());
 235             LOG.debug("GNPy: the reader {}", reader.toString());
 236             LOG.debug("GNPy: the jsonParser class {} // jsonParser to string {}", jsonParser.getClass(),
 237                     jsonParser.toString());
 238             jsonParser.parse(reader);
 239         } catch (IOException e) {
 240             LOG.warn("GNPy: exception {} occured during parsing Json input stream", e.getMessage());
 241             return Optional.empty();
 242         }
 243         return Optional.ofNullable(result.getResult());
 244     }
 245
 246     private SchemaContext getSchemaContext(Class<? extends DataObject> objectClass) throws Exception {
 247         final ModuleInfoBackedContext moduleContext = ModuleInfoBackedContext.create();
 248         Iterable<? extends YangModuleInfo> moduleInfos;
 249         SchemaContext schemaContext = null;
 250         moduleInfos = Collections.singleton(BindingReflections.getModuleInfo(objectClass));
 251         moduleContext.addModuleInfos(moduleInfos);
 252         schemaContext = moduleContext.tryToCreateSchemaContext().get();
 253         return schemaContext;
 254     }
 255
 256     /**
 257      * Transforms the given input {@link NormalizedNode} into the given
 258      * {@link DataObject}.
 259      *
 260      * @param normalizedNode
 261      *            normalized node you want to convert
 262      * @param rootNode
 263      *            {@link QName} of converted normalized node root
 264      *
 265      *            <p>
 266      *            The input object should be {@link ContainerNode}
 267      *            </p>
 268      */
 269     public <T extends DataObject> Optional<T> getDataObject(@Nonnull NormalizedNode<?, ?> normalizedNode,
 270             @Nonnull QName rootNode, BindingNormalizedNodeSerializer codecRegistry) {
 271         if (normalizedNode != null) {
 272             LOG.debug("GNPy: The codecRegistry is ", codecRegistry.toString());
 273         } else {
 274             LOG.warn("GNPy: The codecRegistry is null");
 275         }
 276         Preconditions.checkNotNull(normalizedNode);
 277         if (normalizedNode instanceof ContainerNode) {
 278             YangInstanceIdentifier.PathArgument directChildIdentifier = YangInstanceIdentifier.of(rootNode)
 279                     .getLastPathArgument();
 280             Optional<NormalizedNode<?, ?>> directChild = NormalizedNodes.getDirectChild(normalizedNode,
 281                     directChildIdentifier);
 282             if (!directChild.isPresent()) {
 283                 throw new IllegalStateException(String.format("Could not get the direct child of %s", rootNode));
 284             }
 285             normalizedNode = directChild.get();
 286             LOG.debug("GNPy: the normalized node is ", normalizedNode.getNodeType());
 287         }
 288         YangInstanceIdentifier rootNodeYangInstanceIdentifier = YangInstanceIdentifier.of(rootNode);
 289         LOG.debug("GNPy: the root Node Yang Instance Identifier is ", rootNodeYangInstanceIdentifier.toString());
 290         Map.Entry<?, ?> bindingNodeEntry = codecRegistry.fromNormalizedNode(rootNodeYangInstanceIdentifier,
 291                 normalizedNode);
 292         if (bindingNodeEntry == null) {
 293             LOG.debug("The binding Node Entry is null");
 294             return Optional.empty();
 295         }
 296         return Optional.ofNullable((T) bindingNodeEntry.getValue());
 297     }
 298
 299     public Response getResponse() {
 300         return response;
 301     }
 302 }