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.List;
  12
  13 import org.opendaylight.transportpce.common.network.NetworkTransactionService;
  14 import org.opendaylight.transportpce.pce.constraints.PceConstraints;
  15 import org.opendaylight.yang.gen.v1.gnpy.gnpy.api.rev190103.GnpyApi;
  16 import org.opendaylight.yang.gen.v1.gnpy.gnpy.api.rev190103.GnpyApiBuilder;
  17 import org.opendaylight.yang.gen.v1.gnpy.gnpy.api.rev190103.gnpy.api.ServiceFileBuilder;
  18 import org.opendaylight.yang.gen.v1.gnpy.gnpy.api.rev190103.gnpy.api.TopologyFileBuilder;
  19 import org.opendaylight.yang.gen.v1.gnpy.gnpy.network.topology.rev181214.topo.Connections;
  20 import org.opendaylight.yang.gen.v1.gnpy.gnpy.network.topology.rev181214.topo.Elements;
  21 import org.opendaylight.yang.gen.v1.gnpy.path.rev200202.generic.path.properties.path.properties.PathRouteObjects;
  22 import org.opendaylight.yang.gen.v1.gnpy.path.rev200202.service.PathRequest;
  23 import org.opendaylight.yang.gen.v1.gnpy.path.rev200202.synchronization.info.Synchronization;
  24 import org.opendaylight.yang.gen.v1.http.org.opendaylight.transportpce.pce.rev200128.PathComputationRequestInput;
  25 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.pathdescription.rev171017.path.description.AToZDirection;
  26 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.pathdescription.rev171017.path.description.AToZDirectionBuilder;
  27 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.pathdescription.rev171017.path.description.ZToADirection;
  28 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.routing.constraints.rev171017.routing.constraints.sp.HardConstraints;
  29 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  30 import org.slf4j.Logger;
  31 import org.slf4j.LoggerFactory;
  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 static final Logger LOG = LoggerFactory.getLogger(GnpyResult.class);
  43     private NetworkTransactionService networkTransaction;
  44     private PathComputationRequestInput input;
  45     private GnpyTopoImpl gnpyTopo = null;
  46     private GnpyResult gnpyAtoZ;
  47     private GnpyResult gnpyZtoA;
  48     private Long requestId;
  49
  50     public GnpyUtilitiesImpl(NetworkTransactionService networkTransaction, PathComputationRequestInput input)
  51         throws GnpyException {
  52
  53         this.networkTransaction = networkTransaction;
  54         this.gnpyTopo = new GnpyTopoImpl(networkTransaction);
  55         this.input = input;
  56         this.gnpyAtoZ = null;
  57         this.gnpyZtoA = null;
  58         this.requestId = (long) 0;
  59     }
  60
  61     public boolean verifyComputationByGnpy(AToZDirection atoz, ZToADirection ztoa, PceConstraints pceHardConstraints)
  62         throws GnpyException, Exception {
  63
  64         if (atoz == null || atoz.getAToZ() == null || ztoa == null || ztoa.getZToA() == null) {
  65             throw new GnpyException("In GnpyUtilities: the path transmitted to Gnpy is null");
  66         }
  67
  68         GnpyServiceImpl gnpySvc1 = new GnpyServiceImpl(input, atoz, requestId, gnpyTopo, pceHardConstraints);
  69         this.gnpyAtoZ = gnpyResponseOneDirection(gnpySvc1);
  70         boolean isPcePathFeasible = false;
  71         isPcePathFeasible = this.gnpyAtoZ.getPathFeasibility();
  72         GnpyServiceImpl gnpySvc2 = new GnpyServiceImpl(input, ztoa, requestId, gnpyTopo, pceHardConstraints);
  73         this.gnpyZtoA = gnpyResponseOneDirection(gnpySvc2);
  74         isPcePathFeasible &= this.gnpyZtoA.getPathFeasibility();
  75         return isPcePathFeasible;
  76     }
  77
  78     public GnpyResult gnpyResponseOneDirection(GnpyServiceImpl gnpySvc) throws GnpyException, Exception {
  79         requestId++;
  80         List<PathRequest> pathRequestList = gnpySvc.getPathRequest();
  81         List<Synchronization> synchronizationList = gnpySvc.getSynchronization();
  82         // Send the computed path to GNPY tool
  83         List<Elements> elementsList = gnpyTopo.getElements();
  84         List<Connections> connectionsList = gnpyTopo.getConnections();
  85         String gnpyResponse = getGnpyResponse(elementsList, connectionsList, pathRequestList,
  86             synchronizationList);
  87         // Analyze the response
  88         if (gnpyResponse == null) {
  89             throw new GnpyException("In GnpyUtilities: no respnse from GNPy server");
  90         }
  91         GnpyResult result = new GnpyResult(gnpyResponse, gnpyTopo);
  92         result.analyzeResult();
  93         return result;
  94     }
  95
  96     public HardConstraints askNewPathFromGnpy(HardConstraints gnpyPathAsHC, PceConstraints pceHardConstraints)
  97             throws GnpyException, Exception {
  98
  99         AToZDirection atoztmp = new AToZDirectionBuilder()
 100             .setRate(input.getServiceAEnd().getServiceRate())
 101             .setAToZ(null)
 102             .build();
 103         GnpyServiceImpl gnpySvc = new GnpyServiceImpl(input, atoztmp, requestId, gnpyTopo, pceHardConstraints);
 104         GnpyResult result = gnpyResponseOneDirection(gnpySvc);
 105
 106         if (result == null) {
 107             throw new GnpyException("In GnpyUtilities: no response from the GNPy server");
 108         }
 109
 110         if (!result.getPathFeasibility()) {
 111             return null;
 112         }
 113         List<PathRouteObjects> pathRouteObjectList = result.analyzeResult();
 114         gnpyPathAsHC = result.computeHardConstraintsFromGnpyPath(pathRouteObjectList);
 115
 116         return gnpyPathAsHC;
 117     }
 118
 119     public String getGnpyResponse(List<Elements> elementsList, List<Connections> connectionsList,
 120         List<PathRequest> pathRequestList, List<Synchronization> synchronizationList) throws GnpyException, Exception {
 121         GnpyApi gnpyApi = new GnpyApiBuilder()
 122             .setTopologyFile(
 123                 new TopologyFileBuilder().setElements(elementsList).setConnections(connectionsList).build())
 124             .setServiceFile(
 125                 new ServiceFileBuilder().setPathRequest(pathRequestList).build())
 126             .build();
 127         InstanceIdentifier<GnpyApi> idGnpyApi = InstanceIdentifier.builder(GnpyApi.class).build();
 128         String gnpyJson;
 129         ServiceDataStoreOperationsImpl sd = new ServiceDataStoreOperationsImpl(networkTransaction);
 130         gnpyJson = sd.createJsonStringFromDataObject(idGnpyApi, gnpyApi);
 131         LOG.debug("GNPy Id: {} / json created : {}", idGnpyApi, gnpyJson);
 132         ConnectToGnpyServer connect = new ConnectToGnpyServer();
 133         String gnpyJsonModified = gnpyJson
 134             .replace("gnpy-eqpt-config:", "")
 135             .replace("gnpy-path-computation-simplified:", "")
 136             .replace("gnpy-network-topology:", "");
 137
 138         String gnpyResponse = connect.gnpyCnx(gnpyJsonModified);
 139         return gnpyResponse;
 140     }
 141
 142     public GnpyResult getGnpyAtoZ() {
 143         return gnpyAtoZ;
 144     }
 145
 146     public GnpyResult getGnpyZtoA() {
 147         return gnpyZtoA;
 148     }
 149 }