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.opendaylight.yangtools.yang.common.Uint32;
  31 import org.slf4j.Logger;
  32 import org.slf4j.LoggerFactory;
  33
  34 /**
  35  * Class that implements the functions asked to gnpy.
  36  *
  37  * @author Ahmed Triki ( ahmed.triki@orange.com )
  38  *
  39  */
  40
  41 public class GnpyUtilitiesImpl {
  42
  43     private static final Logger LOG = LoggerFactory.getLogger(GnpyUtilitiesImpl.class);
  44     private NetworkTransactionService networkTransaction;
  45     private PathComputationRequestInput input;
  46     private GnpyTopoImpl gnpyTopo = null;
  47     private GnpyResult gnpyAtoZ;
  48     private GnpyResult gnpyZtoA;
  49     private Uint32 requestId;
  50
  51     public GnpyUtilitiesImpl(NetworkTransactionService networkTransaction, PathComputationRequestInput input)
  52         throws GnpyException {
  53
  54         this.networkTransaction = networkTransaction;
  55         this.gnpyTopo = new GnpyTopoImpl(networkTransaction);
  56         this.input = input;
  57         this.gnpyAtoZ = null;
  58         this.gnpyZtoA = null;
  59         this.requestId = Uint32.valueOf(0);
  60     }
  61
  62     public boolean verifyComputationByGnpy(AToZDirection atoz, ZToADirection ztoa, PceConstraints pceHardConstraints)
  63         throws GnpyException, Exception {
  64
  65         if (atoz == null || atoz.getAToZ() == null || ztoa == null || ztoa.getZToA() == null) {
  66             throw new GnpyException("In GnpyUtilities: the path transmitted to Gnpy is null");
  67         }
  68
  69         GnpyServiceImpl gnpySvc1 = new GnpyServiceImpl(input, atoz, requestId, gnpyTopo, pceHardConstraints);
  70         this.gnpyAtoZ = gnpyResponseOneDirection(gnpySvc1);
  71         boolean isPcePathFeasible = false;
  72         isPcePathFeasible = this.gnpyAtoZ.getPathFeasibility();
  73         GnpyServiceImpl gnpySvc2 = new GnpyServiceImpl(input, ztoa, requestId, gnpyTopo, pceHardConstraints);
  74         this.gnpyZtoA = gnpyResponseOneDirection(gnpySvc2);
  75         isPcePathFeasible &= this.gnpyZtoA.getPathFeasibility();
  76         return isPcePathFeasible;
  77     }
  78
  79     public GnpyResult gnpyResponseOneDirection(GnpyServiceImpl gnpySvc) throws GnpyException, Exception {
  80         requestId = Uint32.valueOf((requestId.toJava()) + 1);
  81         List<PathRequest> pathRequestList = gnpySvc.getPathRequest();
  82         List<Synchronization> synchronizationList = gnpySvc.getSynchronization();
  83         // Send the computed path to GNPY tool
  84         List<Elements> elementsList = gnpyTopo.getElements();
  85         List<Connections> connectionsList = gnpyTopo.getConnections();
  86         String gnpyResponse = getGnpyResponse(elementsList, connectionsList, pathRequestList,
  87             synchronizationList);
  88         // Analyze the response
  89         if (gnpyResponse == null) {
  90             throw new GnpyException("In GnpyUtilities: no response from GNPy server");
  91         }
  92         GnpyResult result = new GnpyResult(gnpyResponse, gnpyTopo);
  93         result.analyzeResult();
  94         return result;
  95     }
  96
  97     public HardConstraints askNewPathFromGnpy(PceConstraints pceHardConstraints)
  98             throws GnpyException, Exception {
  99
 100         AToZDirection atoztmp = new AToZDirectionBuilder()
 101             .setRate(input.getServiceAEnd().getServiceRate())
 102             .setAToZ(null)
 103             .build();
 104         GnpyServiceImpl gnpySvc = new GnpyServiceImpl(input, atoztmp, requestId, gnpyTopo, pceHardConstraints);
 105         GnpyResult result = gnpyResponseOneDirection(gnpySvc);
 106
 107         if (result == null) {
 108             throw new GnpyException("In GnpyUtilities: no result from the GNPy server");
 109         }
 110
 111         if (!result.getPathFeasibility()) {
 112             return null;
 113         }
 114         List<PathRouteObjects> pathRouteObjectList = result.analyzeResult();
 115         return result.computeHardConstraintsFromGnpyPath(pathRouteObjectList);
 116     }
 117
 118     public String getGnpyResponse(List<Elements> elementsList, List<Connections> connectionsList,
 119         List<PathRequest> pathRequestList, List<Synchronization> synchronizationList) throws GnpyException, Exception {
 120         GnpyApi gnpyApi = new GnpyApiBuilder()
 121             .setTopologyFile(
 122                 new TopologyFileBuilder().setElements(elementsList).setConnections(connectionsList).build())
 123             .setServiceFile(
 124                 new ServiceFileBuilder().setPathRequest(pathRequestList).build())
 125             .build();
 126         InstanceIdentifier<GnpyApi> idGnpyApi = InstanceIdentifier.builder(GnpyApi.class).build();
 127         String gnpyJson;
 128         ServiceDataStoreOperationsImpl sd = new ServiceDataStoreOperationsImpl(networkTransaction);
 129         gnpyJson = sd.createJsonStringFromDataObject(idGnpyApi, gnpyApi);
 130         LOG.debug("GNPy Id: {} / json created : {}", idGnpyApi, gnpyJson);
 131         ConnectToGnpyServer connect = new ConnectToGnpyServer();
 132         String gnpyJsonModified = gnpyJson
 133             .replace("gnpy-eqpt-config:", "")
 134             .replace("gnpy-path-computation-simplified:", "")
 135             .replace("gnpy-network-topology:", "");
 136
 137         return connect.returnGnpyResponse(gnpyJsonModified);
 138     }
 139
 140     public GnpyResult getGnpyAtoZ() {
 141         return gnpyAtoZ;
 142     }
 143
 144     public GnpyResult getGnpyZtoA() {
 145         return gnpyZtoA;
 146     }
 147 }