pce/src/main/java/org/opendaylight/transportpce/pce/PceSendingPceRPCs.java

   1 /*
   2  * Copyright © 2017 AT&T 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;
  10
  11 import org.opendaylight.transportpce.common.ResponseCodes;
  12 import org.opendaylight.transportpce.common.mapping.PortMapping;
  13 import org.opendaylight.transportpce.common.network.NetworkTransactionService;
  14 import org.opendaylight.transportpce.pce.constraints.PceConstraints;
  15 import org.opendaylight.transportpce.pce.constraints.PceConstraintsCalc;
  16 import org.opendaylight.transportpce.pce.gnpy.GnpyException;
  17 import org.opendaylight.transportpce.pce.gnpy.GnpyResult;
  18 import org.opendaylight.transportpce.pce.gnpy.GnpyUtilitiesImpl;
  19 import org.opendaylight.transportpce.pce.gnpy.consumer.GnpyConsumer;
  20 import org.opendaylight.transportpce.pce.graph.PceGraph;
  21 import org.opendaylight.transportpce.pce.networkanalyzer.PceCalculation;
  22 import org.opendaylight.transportpce.pce.networkanalyzer.PceResult;
  23 import org.opendaylight.yang.gen.v1.http.org.opendaylight.transportpce.pce.rev220808.PathComputationRequestInput;
  24 import org.opendaylight.yang.gen.v1.http.org.opendaylight.transportpce.pce.rev220808.PathComputationRequestInputBuilder;
  25 import org.opendaylight.yang.gen.v1.http.org.opendaylight.transportpce.pce.rev220808.path.computation.reroute.request.input.Endpoints;
  26 import org.opendaylight.yang.gen.v1.http.org.opendaylight.transportpce.pce.rev220808.service.path.rpc.result.PathDescriptionBuilder;
  27 import org.opendaylight.yang.gen.v1.http.org.openroadm.routing.constraints.rev211210.routing.constraints.HardConstraints;
  28 import org.opendaylight.yang.gen.v1.http.org.transportpce.b.c._interface.pathdescription.rev210705.path.description.AToZDirection;
  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.service.types.rev220118.PceMetric;
  31 import org.slf4j.Logger;
  32 import org.slf4j.LoggerFactory;
  33
  34 /*
  35  * Class for Sending
  36  * PCE requests :
  37  * - path-computation-request
  38  * - path-computation-reroute
  39  * - cancel-resource-reserve.
  40  * @author Martial Coulibaly ( martial.coulibaly@gfi.com ) on behalf of Orange
  41  *
  42  */
  43 public class PceSendingPceRPCs {
  44
  45     /* Logging. */
  46     private static final Logger LOG = LoggerFactory.getLogger(PceSendingPceRPCs.class);
  47     /* define procedure success (or not ). */
  48     private PceResult rc = new PceResult();
  49
  50     /*
  51      * define type of request<br> <code>true</code> pathcomputation <br>
  52      * <code>false</code> cancelresourcereserve .
  53      */
  54     private PathDescriptionBuilder pathDescription;
  55     private PathComputationRequestInput input;
  56     private NetworkTransactionService networkTransaction;
  57     private PceConstraints pceHardConstraints = new PceConstraints();
  58     private PceConstraints pceSoftConstraints = new PceConstraints();
  59     private GnpyResult gnpyAtoZ;
  60     private GnpyResult gnpyZtoA;
  61     private Boolean success;
  62     private String message;
  63     private String responseCode;
  64     private final GnpyConsumer gnpyConsumer;
  65     private PortMapping portMapping;
  66     // Define the termination points whose reservation status is not taken into account during the pruning process
  67     private Endpoints endpoints;
  68
  69     public PceSendingPceRPCs(GnpyConsumer gnpyConsumer) {
  70         setPathDescription(null);
  71         this.input = null;
  72         this.networkTransaction = null;
  73         this.gnpyConsumer = gnpyConsumer;
  74     }
  75
  76     public PceSendingPceRPCs(PathComputationRequestInput input, NetworkTransactionService networkTransaction,
  77                              GnpyConsumer gnpyConsumer, PortMapping portMapping) {
  78         this.gnpyConsumer = gnpyConsumer;
  79         setPathDescription(null);
  80         // TODO compliance check to check that input is not empty
  81         this.input = input;
  82         this.networkTransaction = networkTransaction;
  83         this.portMapping = portMapping;
  84         this.endpoints = null;
  85     }
  86
  87     public PceSendingPceRPCs(PathComputationRequestInput input, NetworkTransactionService networkTransaction,
  88                              GnpyConsumer gnpyConsumer, PortMapping portMapping,
  89                              Endpoints endpoints) {
  90         this.gnpyConsumer = gnpyConsumer;
  91         setPathDescription(null);
  92         this.input = input;
  93         this.networkTransaction = networkTransaction;
  94         this.portMapping = portMapping;
  95         this.endpoints = endpoints;
  96     }
  97
  98     public void cancelResourceReserve() {
  99         success = false;
 100         LOG.info("Wait for 10s til beginning the PCE cancelResourceReserve request");
 101         try {
 102             // sleep for 10s
 103             Thread.sleep(10000);
 104         } catch (InterruptedException e) {
 105             LOG.error("in PCESendingPceRPC: ",e);
 106         }
 107         success = true;
 108         LOG.info("cancelResourceReserve ...");
 109     }
 110
 111     public void pathComputationWithConstraints(PceConstraints hardConstraints, PceConstraints softConstraints) {
 112
 113         PceCalculation nwAnalizer = new PceCalculation(input, networkTransaction, hardConstraints, softConstraints, rc,
 114                 portMapping, endpoints);
 115         nwAnalizer.retrievePceNetwork();
 116         rc = nwAnalizer.getReturnStructure();
 117         String serviceType = nwAnalizer.getServiceType();
 118         if (!rc.getStatus()) {
 119             LOG.error("In pathComputationWithConstraints, nwAnalizer: result = {}", rc);
 120             return;
 121         }
 122         LOG.info("PceGraph ...");
 123         PceGraph graph = new PceGraph(nwAnalizer.getaendPceNode(), nwAnalizer.getzendPceNode(),
 124                 nwAnalizer.getAllPceNodes(), hardConstraints, softConstraints, rc, serviceType);
 125         graph.calcPath();
 126         rc = graph.getReturnStructure();
 127         if (!rc.getStatus()) {
 128             LOG.warn("In pathComputationWithConstraints : Graph return without Path ");
 129             // TODO fix. This is quick workaround for algorithm problem
 130             if ((rc.getLocalCause() == PceResult.LocalCause.TOO_HIGH_LATENCY)
 131                 && (hardConstraints.getPceMetrics() == PceMetric.HopCount)
 132                 && (hardConstraints.getMaxLatency() != -1)) {
 133                 hardConstraints.setPceMetrics(PceMetric.PropagationDelay);
 134                 graph = patchRerunGraph(graph);
 135             }
 136
 137             if (rc.getLocalCause() == PceResult.LocalCause.HD_NODE_INCLUDE) {
 138                 graph.setKpathsToBring(graph.getKpathsToBring() * 10);
 139                 graph = patchRerunGraph(graph);
 140             }
 141
 142             if (!rc.getStatus()) {
 143                 LOG.error("In pathComputationWithConstraints, graph.calcPath: result = {}", rc);
 144                 return;
 145             }
 146         }
 147         LOG.info("PcePathDescription ...");
 148         PcePathDescription description = new PcePathDescription(graph.getPathAtoZ(), nwAnalizer.getAllPceLinks(), rc);
 149         description.buildDescriptions();
 150         rc = description.getReturnStructure();
 151         if (!rc.getStatus()) {
 152             LOG.error("In pathComputationWithConstraints, description: result = {}", rc);
 153         }
 154     }
 155
 156     public void pathComputation() throws Exception {
 157
 158         PceConstraintsCalc constraints = new PceConstraintsCalc(input, networkTransaction);
 159         pceHardConstraints = constraints.getPceHardConstraints();
 160         pceSoftConstraints = constraints.getPceSoftConstraints();
 161         pathComputationWithConstraints(pceHardConstraints, pceSoftConstraints);
 162         this.success = rc.getStatus();
 163         this.message = rc.getMessage();
 164         this.responseCode = rc.getResponseCode();
 165
 166         AToZDirection atoz = null;
 167         ZToADirection ztoa = null;
 168         if (rc.getStatus()) {
 169             atoz = rc.getAtoZDirection();
 170             ztoa = rc.getZtoADirection();
 171         }
 172
 173         //Connect to Gnpy to check path feasibility and recompute another path in case of path non-feasibility
 174         try {
 175             if (gnpyConsumer.isAvailable()) {
 176                 GnpyUtilitiesImpl gnpy = new GnpyUtilitiesImpl(networkTransaction, input,
 177                         gnpyConsumer);
 178                 if (rc.getStatus() && gnpyToCheckFeasiblity(atoz,ztoa,gnpy)) {
 179                     setPathDescription(new PathDescriptionBuilder().setAToZDirection(atoz).setZToADirection(ztoa));
 180                     return;
 181                 }
 182                 callGnpyToComputeNewPath(gnpy);
 183             } else {
 184                 setPathDescription(new PathDescriptionBuilder().setAToZDirection(atoz).setZToADirection(ztoa));
 185             }
 186         }
 187         catch (GnpyException e) {
 188             LOG.error("Exception raised by GNPy {}",e.getMessage());
 189             setPathDescription(new PathDescriptionBuilder().setAToZDirection(atoz).setZToADirection(ztoa));
 190         }
 191     }
 192
 193     private boolean gnpyToCheckFeasiblity(AToZDirection atoz, ZToADirection ztoa, GnpyUtilitiesImpl gnpy)
 194             throws GnpyException {
 195
 196         //Call GNPy for path verification
 197         if (gnpy.verifyComputationByGnpy(atoz, ztoa, pceHardConstraints)) {
 198             LOG.info("In pceSendingPceRPC: the path is feasible according to Gnpy");
 199             gnpyAtoZ = gnpy.getGnpyAtoZ();
 200             gnpyZtoA = gnpy.getGnpyZtoA();
 201             return true;
 202         }
 203         return false;
 204     }
 205
 206     private void callGnpyToComputeNewPath(GnpyUtilitiesImpl gnpy) throws GnpyException {
 207
 208         //Call GNPy in the case of non feasibility
 209         LOG.info("In pceSendingPceRPC: the path is not feasible according to Gnpy");
 210         HardConstraints gnpyPathAsHC = null;
 211         gnpyPathAsHC = gnpy.askNewPathFromGnpy(pceHardConstraints);
 212         if (gnpyPathAsHC == null) {
 213             LOG.info("In pceSendingPceRPC: GNPy failed to find another path");
 214             this.success = false;
 215             this.message = "No path available by PCE and GNPy ";
 216             this.responseCode = ResponseCodes.RESPONSE_FAILED;
 217             gnpyAtoZ = gnpy.getGnpyAtoZ();
 218             gnpyZtoA = gnpy.getGnpyZtoA();
 219             return;
 220         }
 221
 222         LOG.info("In pceSendingPceRPC: GNPy succeed to find another path");
 223         // Compute the path
 224         PathComputationRequestInput inputFromGnpy = new PathComputationRequestInputBuilder()
 225             .setServiceName(input.getServiceName())
 226             .setHardConstraints(gnpyPathAsHC)
 227             .setSoftConstraints(input.getSoftConstraints())
 228             .setPceRoutingMetric(PceMetric.HopCount)
 229             .setServiceAEnd(input.getServiceAEnd())
 230             .setServiceZEnd(input.getServiceZEnd())
 231             .build();
 232         PceConstraintsCalc constraintsGnpy = new PceConstraintsCalc(inputFromGnpy, networkTransaction);
 233         PceConstraints gnpyHardConstraints = constraintsGnpy.getPceHardConstraints();
 234         PceConstraints gnpySoftConstraints = constraintsGnpy.getPceSoftConstraints();
 235         pathComputationWithConstraints(gnpyHardConstraints, gnpySoftConstraints);
 236         AToZDirection atoz = rc.getAtoZDirection();
 237         ZToADirection ztoa = rc.getZtoADirection();
 238         if (gnpyToCheckFeasiblity(atoz, ztoa,gnpy)) {
 239             LOG.info("In pceSendingPceRPC: the new path computed by GNPy is valid");
 240             this.success = true;
 241             this.message = "Path is calculated by GNPy";
 242             this.responseCode = ResponseCodes.RESPONSE_OK;
 243             setPathDescription(new PathDescriptionBuilder().setAToZDirection(atoz).setZToADirection(ztoa));
 244         } else {
 245             LOG.info("In pceSendingPceRPC: the new path computed by GNPy is not valid");
 246             this.success = false;
 247             this.message = "No path available";
 248             this.responseCode = ResponseCodes.RESPONSE_FAILED;
 249             setPathDescription(new PathDescriptionBuilder().setAToZDirection(null).setZToADirection(null));
 250         }
 251     }
 252
 253     private PceGraph patchRerunGraph(PceGraph graph) {
 254         LOG.info("In pathComputation patchRerunGraph : rerun Graph with metric = PROPAGATION-DELAY ");
 255         graph.setConstrains(pceHardConstraints, pceSoftConstraints);
 256         graph.calcPath();
 257         return graph;
 258     }
 259
 260     public PathDescriptionBuilder getPathDescription() {
 261         return pathDescription;
 262     }
 263
 264     private void setPathDescription(PathDescriptionBuilder pathDescription) {
 265         this.pathDescription = pathDescription;
 266     }
 267
 268     public Boolean getSuccess() {
 269         return this.success;
 270     }
 271
 272     public String getMessage() {
 273         return this.message;
 274     }
 275
 276     public String getResponseCode() {
 277         return this.responseCode;
 278     }
 279
 280     public GnpyResult getGnpyAtoZ() {
 281         return gnpyAtoZ;
 282     }
 283
 284     public GnpyResult getGnpyZtoA() {
 285         return gnpyZtoA;
 286     }
 287 }