pce/src/main/java/org/opendaylight/transportpce/pce/gnpy/GnpyUtilitiesImpl.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 java.util.ArrayList;
  12 import java.util.List;
  13 import java.util.stream.Collectors;
  14 import org.opendaylight.transportpce.common.network.NetworkTransactionService;
  15 import org.opendaylight.transportpce.pce.constraints.PceConstraints;
  16 import org.opendaylight.transportpce.pce.gnpy.consumer.GnpyConsumer;
  17 import org.opendaylight.yang.gen.v1.gnpy.gnpy.api.rev220221.RequestBuilder;
  18 import org.opendaylight.yang.gen.v1.gnpy.gnpy.api.rev220221.request.ServiceBuilder;
  19 import org.opendaylight.yang.gen.v1.gnpy.gnpy.api.rev220221.request.TopologyBuilder;
  20 import org.opendaylight.yang.gen.v1.gnpy.gnpy.network.topology.rev220221.topo.Connections;
  21 import org.opendaylight.yang.gen.v1.gnpy.gnpy.network.topology.rev220221.topo.Elements;
  22 import org.opendaylight.yang.gen.v1.gnpy.path.rev220221.Result;
  23 import org.opendaylight.yang.gen.v1.gnpy.path.rev220221.generic.path.properties.path.properties.PathRouteObjects;
  24 import org.opendaylight.yang.gen.v1.gnpy.path.rev220221.service.PathRequest;
  25 import org.opendaylight.yang.gen.v1.gnpy.path.rev220221.synchronization.info.Synchronization;
  26 import org.opendaylight.yang.gen.v1.http.org.opendaylight.transportpce.pce.rev220118.PathComputationRequestInput;
  27 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.pathdescription.rev210705.path.description.AToZDirection;
  28 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.pathdescription.rev210705.path.description.AToZDirectionBuilder;
  29 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.pathdescription.rev210705.path.description.ZToADirection;
  30 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.routing.constraints.rev220118.routing.constraints.sp.HardConstraints;
  31 import org.opendaylight.yangtools.yang.common.Uint32;
  32
  33 /**
  34  * Class that implements the functions asked to gnpy.
  35  *
  36  * @author Ahmed Triki ( ahmed.triki@orange.com )
  37  *
  38  */
  39
  40 public class GnpyUtilitiesImpl {
  41
  42     private PathComputationRequestInput input;
  43     private GnpyTopoImpl gnpyTopo = null;
  44     private GnpyResult gnpyAtoZ;
  45     private GnpyResult gnpyZtoA;
  46     private Uint32 requestId;
  47     private final GnpyConsumer gnpyConsumer;
  48
  49     public GnpyUtilitiesImpl(NetworkTransactionService networkTransaction, PathComputationRequestInput input,
  50             GnpyConsumer gnpyConsumer)
  51         throws GnpyException {
  52         this.gnpyTopo = new GnpyTopoImpl(networkTransaction);
  53         this.input = input;
  54         this.gnpyAtoZ = null;
  55         this.gnpyZtoA = null;
  56         this.requestId = Uint32.valueOf(0);
  57         this.gnpyConsumer = gnpyConsumer;
  58     }
  59
  60     public boolean verifyComputationByGnpy(AToZDirection atoz, ZToADirection ztoa, PceConstraints pceHardConstraints)
  61         throws GnpyException {
  62
  63         if (atoz == null || atoz.getAToZ() == null || ztoa == null || ztoa.getZToA() == null) {
  64             throw new GnpyException("In GnpyUtilities: the path transmitted to Gnpy is null");
  65         }
  66
  67         GnpyServiceImpl gnpySvc1 = new GnpyServiceImpl(input, atoz, requestId, gnpyTopo, pceHardConstraints);
  68         this.gnpyAtoZ = gnpyResponseOneDirection(gnpySvc1);
  69         boolean isPcePathFeasible = false;
  70         isPcePathFeasible = this.gnpyAtoZ.getPathFeasibility();
  71         GnpyServiceImpl gnpySvc2 = new GnpyServiceImpl(input, ztoa, requestId, gnpyTopo, pceHardConstraints);
  72         this.gnpyZtoA = gnpyResponseOneDirection(gnpySvc2);
  73         isPcePathFeasible &= this.gnpyZtoA.getPathFeasibility();
  74         return isPcePathFeasible;
  75     }
  76
  77     @SuppressWarnings("checkstyle:illegalcatch")
  78     public GnpyResult gnpyResponseOneDirection(GnpyServiceImpl gnpySvc) throws GnpyException {
  79         requestId = Uint32.valueOf((requestId.toJava()) + 1);
  80         List<PathRequest> pathRequestList = new ArrayList<>(gnpySvc.getPathRequest().values());
  81         List<Synchronization> synchronizationList = gnpySvc.getSynchronization();
  82         // Send the computed path to GNPY tool
  83         List<Elements> elementsList = new ArrayList<>(gnpyTopo.getElements().values());
  84         List<Connections> connectionsList = gnpyTopo.getConnections();
  85         Result gnpyResponse = getGnpyResponse(elementsList, connectionsList, pathRequestList,
  86                 synchronizationList);
  87         // Analyze the response
  88         if (gnpyResponse == null) {
  89             throw new GnpyException("In GnpyUtilities: no response from GNPy server");
  90         }
  91         GnpyResult result = new GnpyResult(gnpyResponse, gnpyTopo);
  92         result.analyzeResult();
  93         return result;
  94     }
  95
  96     public HardConstraints askNewPathFromGnpy(PceConstraints pceHardConstraints)
  97             throws GnpyException {
  98
  99         AToZDirection atoztmp = new AToZDirectionBuilder()
 100             .setRate(input.getServiceAEnd().getServiceRate())
 101             .build();
 102         GnpyServiceImpl gnpySvc = new GnpyServiceImpl(input, atoztmp, requestId, gnpyTopo, pceHardConstraints);
 103         GnpyResult result = gnpyResponseOneDirection(gnpySvc);
 104
 105         if (result == null) {
 106             throw new GnpyException("In GnpyUtilities: no result from the GNPy server");
 107         }
 108
 109         if (!result.getPathFeasibility()) {
 110             return null;
 111         }
 112         List<PathRouteObjects> pathRouteObjectList = result.analyzeResult();
 113         return result.computeHardConstraintsFromGnpyPath(pathRouteObjectList);
 114     }
 115
 116     public Result getGnpyResponse(List<Elements> elementsList, List<Connections> connectionsList,
 117             List<PathRequest> pathRequestList, List<Synchronization> synchronizationList) {
 118
 119         return gnpyConsumer.computePaths(new RequestBuilder()
 120             .setTopology(
 121                 new TopologyBuilder()
 122                 .setElements(elementsList.stream().collect(Collectors.toMap(Elements::key, element -> element)))
 123                 .setConnections(connectionsList).build())
 124             .setService(
 125                 new ServiceBuilder()
 126                 .setPathRequest(pathRequestList.stream()
 127                         .collect(Collectors.toMap(PathRequest::key, pathRequest -> pathRequest)))
 128                 .build())
 129             .build());
 130     }
 131
 132     public GnpyResult getGnpyAtoZ() {
 133         return gnpyAtoZ;
 134     }
 135
 136     public GnpyResult getGnpyZtoA() {
 137         return gnpyZtoA;
 138     }
 139 }