opendaylight/md-sal/statistics-manager/src/main/java/org/opendaylight/controller/md/statistics/manager/StatisticsProvider.java

   1 /*
   2  * Copyright IBM Corporation, 2013.  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 package org.opendaylight.controller.md.statistics.manager;
   9
  10 import java.util.ArrayList;
  11 import java.util.List;
  12 import java.util.concurrent.ConcurrentHashMap;
  13 import java.util.concurrent.ConcurrentMap;
  14 import java.util.concurrent.ExecutionException;
  15 import java.util.concurrent.Future;
  16
  17 import org.eclipse.xtext.xbase.lib.Exceptions;
  18 import org.opendaylight.controller.md.statistics.manager.MultipartMessageManager.StatsRequestType;
  19 import org.opendaylight.controller.sal.binding.api.NotificationProviderService;
  20 import org.opendaylight.controller.sal.binding.api.data.DataBrokerService;
  21 import org.opendaylight.controller.sal.binding.api.data.DataModificationTransaction;
  22 import org.opendaylight.controller.sal.binding.api.data.DataProviderService;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNodeConnector;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.meters.Meter;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.Table;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.Flow;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.GetAggregateFlowStatisticsFromFlowTableForAllFlowsInputBuilder;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.GetAggregateFlowStatisticsFromFlowTableForAllFlowsOutput;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.GetAllFlowsStatisticsFromAllFlowTablesInputBuilder;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.GetAllFlowsStatisticsFromAllFlowTablesOutput;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.GetFlowStatisticsFromFlowTableInputBuilder;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.GetFlowStatisticsFromFlowTableOutput;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.OpendaylightFlowStatisticsService;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.table.statistics.rev131215.GetFlowTablesStatisticsInputBuilder;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.table.statistics.rev131215.GetFlowTablesStatisticsOutput;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.table.statistics.rev131215.OpendaylightFlowTableStatisticsService;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.port.rev130925.queues.Queue;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.queue.rev130925.QueueId;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.GetAllGroupStatisticsInputBuilder;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.GetAllGroupStatisticsOutput;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.GetGroupDescriptionInputBuilder;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.GetGroupDescriptionOutput;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.OpendaylightGroupStatisticsService;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.groups.Group;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeConnectorId;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeRef;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.Nodes;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.node.NodeConnector;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.NodeKey;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.statistics.rev131111.GetAllMeterConfigStatisticsInputBuilder;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.statistics.rev131111.GetAllMeterConfigStatisticsOutput;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.statistics.rev131111.GetAllMeterStatisticsInputBuilder;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.statistics.rev131111.GetAllMeterStatisticsOutput;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.statistics.rev131111.OpendaylightMeterStatisticsService;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.port.statistics.rev131214.GetAllNodeConnectorsStatisticsInputBuilder;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.port.statistics.rev131214.GetAllNodeConnectorsStatisticsOutput;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.port.statistics.rev131214.OpendaylightPortStatisticsService;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.queue.statistics.rev131216.GetAllQueuesStatisticsFromAllPortsInputBuilder;
  62 import org.opendaylight.yang.gen.v1.urn.opendaylight.queue.statistics.rev131216.GetAllQueuesStatisticsFromAllPortsOutput;
  63 import org.opendaylight.yang.gen.v1.urn.opendaylight.queue.statistics.rev131216.GetQueueStatisticsFromGivenPortInputBuilder;
  64 import org.opendaylight.yang.gen.v1.urn.opendaylight.queue.statistics.rev131216.GetQueueStatisticsFromGivenPortOutput;
  65 import org.opendaylight.yang.gen.v1.urn.opendaylight.queue.statistics.rev131216.OpendaylightQueueStatisticsService;
  66 import org.opendaylight.yangtools.concepts.Registration;
  67 import org.opendaylight.yangtools.yang.binding.DataObject;
  68 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  69 import org.opendaylight.yangtools.yang.binding.NotificationListener;
  70 import org.opendaylight.yangtools.yang.common.RpcResult;
  71 import org.slf4j.Logger;
  72 import org.slf4j.LoggerFactory;
  73
  74 /**
  75  * Following are main responsibilities of the class:
  76  * 1) Invoke statistics request thread to send periodic statistics request to all the
  77  * flow capable switch connected to the controller. It sends statistics request for
  78  * Group,Meter,Table,Flow,Queue,Aggregate stats.
  79  *
  80  * 2) Invoke statistics ager thread, to clean up all the stale statistics data from
  81  * operational data store.
  82  *
  83  * @author avishnoi@in.ibm.com
  84  *
  85  */
  86 public class StatisticsProvider implements AutoCloseable {
  87
  88     public final static Logger spLogger = LoggerFactory.getLogger(StatisticsProvider.class);
  89
  90     private DataProviderService dps;
  91
  92     private DataBrokerService dbs;
  93
  94     private NotificationProviderService nps;
  95
  96     private OpendaylightGroupStatisticsService groupStatsService;
  97
  98     private OpendaylightMeterStatisticsService meterStatsService;
  99
 100     private OpendaylightFlowStatisticsService flowStatsService;
 101
 102     private OpendaylightPortStatisticsService portStatsService;
 103
 104     private OpendaylightFlowTableStatisticsService flowTableStatsService;
 105
 106     private OpendaylightQueueStatisticsService queueStatsService;
 107
 108     private final MultipartMessageManager multipartMessageManager = new MultipartMessageManager();
 109
 110     private StatisticsUpdateHandler statsUpdateHandler;
 111
 112     private Thread statisticsRequesterThread;
 113
 114     private Thread statisticsAgerThread;
 115
 116     private final  InstanceIdentifier<Nodes> nodesIdentifier = InstanceIdentifier.builder(Nodes.class).toInstance();
 117
 118     public static final int STATS_THREAD_EXECUTION_TIME= 30000;
 119     //Local caching of stats
 120
 121     private final ConcurrentMap<NodeId,NodeStatisticsAger> statisticsCache =
 122             new ConcurrentHashMap<NodeId,NodeStatisticsAger>();
 123
 124     public DataProviderService getDataService() {
 125       return this.dps;
 126     }
 127
 128     public void setDataService(final DataProviderService dataService) {
 129       this.dps = dataService;
 130     }
 131
 132     public DataBrokerService getDataBrokerService() {
 133         return this.dbs;
 134     }
 135
 136     public void setDataBrokerService(final DataBrokerService dataBrokerService) {
 137         this.dbs = dataBrokerService;
 138     }
 139
 140     public NotificationProviderService getNotificationService() {
 141       return this.nps;
 142     }
 143
 144     public void setNotificationService(final NotificationProviderService notificationService) {
 145       this.nps = notificationService;
 146     }
 147
 148     public MultipartMessageManager getMultipartMessageManager() {
 149         return multipartMessageManager;
 150     }
 151
 152     private final StatisticsUpdateCommiter updateCommiter = new StatisticsUpdateCommiter(StatisticsProvider.this);
 153
 154     private Registration<NotificationListener> listenerRegistration;
 155
 156     public void start() {
 157
 158         NotificationProviderService nps = this.getNotificationService();
 159         Registration<NotificationListener> registerNotificationListener = nps.registerNotificationListener(this.updateCommiter);
 160         this.listenerRegistration = registerNotificationListener;
 161
 162         statsUpdateHandler = new StatisticsUpdateHandler(StatisticsProvider.this);
 163
 164         registerDataStoreUpdateListener(this.getDataBrokerService());
 165
 166         // Get Group/Meter statistics service instance
 167         groupStatsService = StatisticsManagerActivator.getProviderContext().
 168                 getRpcService(OpendaylightGroupStatisticsService.class);
 169
 170         meterStatsService = StatisticsManagerActivator.getProviderContext().
 171                 getRpcService(OpendaylightMeterStatisticsService.class);
 172
 173         flowStatsService = StatisticsManagerActivator.getProviderContext().
 174                 getRpcService(OpendaylightFlowStatisticsService.class);
 175
 176         portStatsService = StatisticsManagerActivator.getProviderContext().
 177                 getRpcService(OpendaylightPortStatisticsService.class);
 178
 179         flowTableStatsService = StatisticsManagerActivator.getProviderContext().
 180                 getRpcService(OpendaylightFlowTableStatisticsService.class);
 181
 182         queueStatsService = StatisticsManagerActivator.getProviderContext().
 183                 getRpcService(OpendaylightQueueStatisticsService.class);
 184
 185         statisticsRequesterThread = new Thread( new Runnable(){
 186
 187             @Override
 188             public void run() {
 189                 while(true){
 190                     try {
 191                         statsRequestSender();
 192
 193                         Thread.sleep(STATS_THREAD_EXECUTION_TIME);
 194                     }catch (Exception e){
 195                         spLogger.error("Exception occurred while sending stats request : {}",e);
 196                     }
 197                 }
 198             }
 199         });
 200
 201         spLogger.debug("Statistics requester thread started with timer interval : {}",STATS_THREAD_EXECUTION_TIME);
 202
 203         statisticsRequesterThread.start();
 204
 205         statisticsAgerThread = new Thread( new Runnable(){
 206
 207             @Override
 208             public void run() {
 209                 while(true){
 210                     try {
 211                         for(NodeStatisticsAger nodeStatisticsAger : statisticsCache.values()){
 212                             nodeStatisticsAger.cleanStaleStatistics();
 213                         }
 214
 215                         Thread.sleep(STATS_THREAD_EXECUTION_TIME);
 216                     }catch (Exception e){
 217                         spLogger.error("Exception occurred while sending stats request : {}",e);
 218                     }
 219                 }
 220             }
 221         });
 222
 223         spLogger.debug("Statistics ager thread started with timer interval : {}",STATS_THREAD_EXECUTION_TIME);
 224
 225         statisticsAgerThread.start();
 226
 227         spLogger.info("Statistics Provider started.");
 228     }
 229
 230     private void registerDataStoreUpdateListener(DataBrokerService dbs) {
 231         //Register for flow updates
 232         InstanceIdentifier<? extends DataObject> pathFlow = InstanceIdentifier.builder(Nodes.class).child(Node.class)
 233                                                                     .augmentation(FlowCapableNode.class)
 234                                                                     .child(Table.class)
 235                                                                     .child(Flow.class).toInstance();
 236         dbs.registerDataChangeListener(pathFlow, statsUpdateHandler);
 237
 238         //Register for meter updates
 239         InstanceIdentifier<? extends DataObject> pathMeter = InstanceIdentifier.builder(Nodes.class).child(Node.class)
 240                                                     .augmentation(FlowCapableNode.class)
 241                                                     .child(Meter.class).toInstance();
 242
 243         dbs.registerDataChangeListener(pathMeter, statsUpdateHandler);
 244
 245         //Register for group updates
 246         InstanceIdentifier<? extends DataObject> pathGroup = InstanceIdentifier.builder(Nodes.class).child(Node.class)
 247                                                     .augmentation(FlowCapableNode.class)
 248                                                     .child(Group.class).toInstance();
 249         dbs.registerDataChangeListener(pathGroup, statsUpdateHandler);
 250
 251         //Register for queue updates
 252         InstanceIdentifier<? extends DataObject> pathQueue = InstanceIdentifier.builder(Nodes.class).child(Node.class)
 253                                                                     .child(NodeConnector.class)
 254                                                                     .augmentation(FlowCapableNodeConnector.class)
 255                                                                     .child(Queue.class).toInstance();
 256         dbs.registerDataChangeListener(pathQueue, statsUpdateHandler);
 257     }
 258
 259     protected DataModificationTransaction startChange() {
 260
 261         DataProviderService dps = this.getDataService();
 262         return dps.beginTransaction();
 263     }
 264
 265     private void statsRequestSender(){
 266
 267         List<Node> targetNodes = getAllConnectedNodes();
 268
 269         if(targetNodes == null)
 270             return;
 271
 272
 273         for (Node targetNode : targetNodes){
 274
 275             if(targetNode.getAugmentation(FlowCapableNode.class) != null){
 276
 277                 spLogger.info("Send request for stats collection to node : {})",targetNode.getId());
 278
 279                 InstanceIdentifier<Node> targetInstanceId = InstanceIdentifier.builder(Nodes.class).child(Node.class,targetNode.getKey()).toInstance();
 280
 281                 NodeRef targetNodeRef = new NodeRef(targetInstanceId);
 282
 283                 try{
 284                     sendAggregateFlowsStatsFromAllTablesRequest(targetNode.getKey());
 285
 286                     sendAllFlowsStatsFromAllTablesRequest(targetNodeRef);
 287
 288                     sendAllNodeConnectorsStatisticsRequest(targetNodeRef);
 289
 290                     sendAllFlowTablesStatisticsRequest(targetNodeRef);
 291
 292                     sendAllQueueStatsFromAllNodeConnector (targetNodeRef);
 293
 294                     sendAllGroupStatisticsRequest(targetNodeRef);
 295
 296                     sendAllMeterStatisticsRequest(targetNodeRef);
 297
 298                     sendGroupDescriptionRequest(targetNodeRef);
 299
 300                     sendMeterConfigStatisticsRequest(targetNodeRef);
 301                 }catch(Exception e){
 302                     spLogger.error("Exception occured while sending statistics requests : {}", e);
 303                 }
 304             }
 305         }
 306     }
 307
 308     public void sendAllFlowTablesStatisticsRequest(NodeRef targetNodeRef) throws InterruptedException, ExecutionException {
 309         final GetFlowTablesStatisticsInputBuilder input =
 310                 new GetFlowTablesStatisticsInputBuilder();
 311
 312         input.setNode(targetNodeRef);
 313
 314         Future<RpcResult<GetFlowTablesStatisticsOutput>> response =
 315                 flowTableStatsService.getFlowTablesStatistics(input.build());
 316
 317         this.multipartMessageManager.addTxIdToRequestTypeEntry(response.get().getResult().getTransactionId()
 318                 , StatsRequestType.ALL_FLOW_TABLE);
 319
 320     }
 321
 322     public void sendAllFlowsStatsFromAllTablesRequest(NodeRef targetNode) throws InterruptedException, ExecutionException{
 323         final GetAllFlowsStatisticsFromAllFlowTablesInputBuilder input =
 324                 new GetAllFlowsStatisticsFromAllFlowTablesInputBuilder();
 325
 326         input.setNode(targetNode);
 327
 328         Future<RpcResult<GetAllFlowsStatisticsFromAllFlowTablesOutput>> response =
 329                 flowStatsService.getAllFlowsStatisticsFromAllFlowTables(input.build());
 330
 331         this.multipartMessageManager.addTxIdToRequestTypeEntry(response.get().getResult().getTransactionId()
 332                 , StatsRequestType.ALL_FLOW);
 333
 334     }
 335
 336     public void sendFlowStatsFromTableRequest(NodeRef targetNode,Flow flow) throws InterruptedException, ExecutionException{
 337         final GetFlowStatisticsFromFlowTableInputBuilder input =
 338                 new GetFlowStatisticsFromFlowTableInputBuilder();
 339
 340         input.setNode(targetNode);
 341         input.fieldsFrom(flow);
 342
 343         Future<RpcResult<GetFlowStatisticsFromFlowTableOutput>> response =
 344                 flowStatsService.getFlowStatisticsFromFlowTable(input.build());
 345
 346         this.multipartMessageManager.addTxIdToRequestTypeEntry(response.get().getResult().getTransactionId()
 347                 , StatsRequestType.ALL_FLOW);
 348
 349     }
 350
 351     public void sendAggregateFlowsStatsFromAllTablesRequest(NodeKey targetNodeKey) throws InterruptedException, ExecutionException{
 352
 353         List<Short> tablesId = getTablesFromNode(targetNodeKey);
 354
 355         if(tablesId.size() != 0){
 356             for(Short id : tablesId){
 357
 358                 spLogger.info("Send aggregate stats request for flow table {} to node {}",id,targetNodeKey);
 359                 GetAggregateFlowStatisticsFromFlowTableForAllFlowsInputBuilder input =
 360                         new GetAggregateFlowStatisticsFromFlowTableForAllFlowsInputBuilder();
 361
 362                 input.setNode(new NodeRef(InstanceIdentifier.builder(Nodes.class).child(Node.class, targetNodeKey).toInstance()));
 363                 input.setTableId(new org.opendaylight.yang.gen.v1.urn.opendaylight.table.types.rev131026.TableId(id));
 364                 Future<RpcResult<GetAggregateFlowStatisticsFromFlowTableForAllFlowsOutput>> response =
 365                         flowStatsService.getAggregateFlowStatisticsFromFlowTableForAllFlows(input.build());
 366
 367                 multipartMessageManager.setTxIdAndTableIdMapEntry(response.get().getResult().getTransactionId(), id);
 368                 this.multipartMessageManager.addTxIdToRequestTypeEntry(response.get().getResult().getTransactionId()
 369                         , StatsRequestType.AGGR_FLOW);
 370             }
 371         }else{
 372             spLogger.debug("No details found in data store for flow tables associated with Node {}",targetNodeKey);
 373         }
 374     }
 375
 376     public void sendAllNodeConnectorsStatisticsRequest(NodeRef targetNode) throws InterruptedException, ExecutionException{
 377
 378         final GetAllNodeConnectorsStatisticsInputBuilder input = new GetAllNodeConnectorsStatisticsInputBuilder();
 379
 380         input.setNode(targetNode);
 381
 382         Future<RpcResult<GetAllNodeConnectorsStatisticsOutput>> response =
 383                 portStatsService.getAllNodeConnectorsStatistics(input.build());
 384         this.multipartMessageManager.addTxIdToRequestTypeEntry(response.get().getResult().getTransactionId()
 385                 , StatsRequestType.ALL_PORT);
 386
 387     }
 388
 389     public void sendAllGroupStatisticsRequest(NodeRef targetNode) throws InterruptedException, ExecutionException{
 390
 391         final GetAllGroupStatisticsInputBuilder input = new GetAllGroupStatisticsInputBuilder();
 392
 393         input.setNode(targetNode);
 394
 395         Future<RpcResult<GetAllGroupStatisticsOutput>> response =
 396                 groupStatsService.getAllGroupStatistics(input.build());
 397
 398         this.multipartMessageManager.addTxIdToRequestTypeEntry(response.get().getResult().getTransactionId()
 399                 , StatsRequestType.ALL_GROUP);
 400
 401     }
 402
 403     public void sendGroupDescriptionRequest(NodeRef targetNode) throws InterruptedException, ExecutionException{
 404         final GetGroupDescriptionInputBuilder input = new GetGroupDescriptionInputBuilder();
 405
 406         input.setNode(targetNode);
 407
 408         Future<RpcResult<GetGroupDescriptionOutput>> response =
 409                 groupStatsService.getGroupDescription(input.build());
 410
 411         this.multipartMessageManager.addTxIdToRequestTypeEntry(response.get().getResult().getTransactionId()
 412                 , StatsRequestType.GROUP_DESC);
 413
 414     }
 415
 416     public void sendAllMeterStatisticsRequest(NodeRef targetNode) throws InterruptedException, ExecutionException{
 417
 418         GetAllMeterStatisticsInputBuilder input = new GetAllMeterStatisticsInputBuilder();
 419
 420         input.setNode(targetNode);
 421
 422         Future<RpcResult<GetAllMeterStatisticsOutput>> response =
 423                 meterStatsService.getAllMeterStatistics(input.build());
 424
 425         this.multipartMessageManager.addTxIdToRequestTypeEntry(response.get().getResult().getTransactionId()
 426                 , StatsRequestType.ALL_METER);;
 427
 428     }
 429
 430     public void sendMeterConfigStatisticsRequest(NodeRef targetNode) throws InterruptedException, ExecutionException{
 431
 432         GetAllMeterConfigStatisticsInputBuilder input = new GetAllMeterConfigStatisticsInputBuilder();
 433
 434         input.setNode(targetNode);
 435
 436         Future<RpcResult<GetAllMeterConfigStatisticsOutput>> response =
 437                 meterStatsService.getAllMeterConfigStatistics(input.build());
 438
 439         this.multipartMessageManager.addTxIdToRequestTypeEntry(response.get().getResult().getTransactionId()
 440                 , StatsRequestType.METER_CONFIG);;
 441
 442     }
 443
 444     public void sendAllQueueStatsFromAllNodeConnector(NodeRef targetNode) throws InterruptedException, ExecutionException {
 445         GetAllQueuesStatisticsFromAllPortsInputBuilder input = new GetAllQueuesStatisticsFromAllPortsInputBuilder();
 446
 447         input.setNode(targetNode);
 448
 449         Future<RpcResult<GetAllQueuesStatisticsFromAllPortsOutput>> response =
 450                 queueStatsService.getAllQueuesStatisticsFromAllPorts(input.build());
 451
 452         this.multipartMessageManager.addTxIdToRequestTypeEntry(response.get().getResult().getTransactionId()
 453                 , StatsRequestType.ALL_QUEUE_STATS);;
 454
 455     }
 456
 457     public void sendQueueStatsFromGivenNodeConnector(NodeRef targetNode,NodeConnectorId nodeConnectorId, QueueId queueId) throws InterruptedException, ExecutionException {
 458         GetQueueStatisticsFromGivenPortInputBuilder input = new GetQueueStatisticsFromGivenPortInputBuilder();
 459
 460         input.setNode(targetNode);
 461         input.setNodeConnectorId(nodeConnectorId);
 462         input.setQueueId(queueId);
 463         Future<RpcResult<GetQueueStatisticsFromGivenPortOutput>> response =
 464                 queueStatsService.getQueueStatisticsFromGivenPort(input.build());
 465
 466         this.multipartMessageManager.addTxIdToRequestTypeEntry(response.get().getResult().getTransactionId()
 467                 , StatsRequestType.ALL_QUEUE_STATS);;
 468
 469     }
 470
 471     public ConcurrentMap<NodeId, NodeStatisticsAger> getStatisticsCache() {
 472         return statisticsCache;
 473     }
 474
 475     private List<Node> getAllConnectedNodes(){
 476
 477         Nodes nodes = (Nodes) dps.readOperationalData(nodesIdentifier);
 478         if(nodes == null)
 479             return null;
 480
 481         spLogger.info("Number of connected nodes : {}",nodes.getNode().size());
 482         return nodes.getNode();
 483     }
 484
 485     private List<Short> getTablesFromNode(NodeKey nodeKey){
 486         InstanceIdentifier<FlowCapableNode> nodesIdentifier = InstanceIdentifier.builder(Nodes.class).child(Node.class,nodeKey).augmentation(FlowCapableNode.class).toInstance();
 487
 488         FlowCapableNode node = (FlowCapableNode)dps.readOperationalData(nodesIdentifier);
 489         List<Short> tablesId = new ArrayList<Short>();
 490         if(node != null && node.getTable()!=null){
 491             spLogger.info("Number of tables {} supported by node {}",node.getTable().size(),nodeKey);
 492             for(Table table: node.getTable()){
 493                 tablesId.add(table.getId());
 494             }
 495         }
 496         return tablesId;
 497     }
 498
 499     @SuppressWarnings("deprecation")
 500     @Override
 501     public void close(){
 502
 503         try {
 504             spLogger.info("Statistics Provider stopped.");
 505             if (this.listenerRegistration != null) {
 506
 507                 this.listenerRegistration.close();
 508
 509                 this.statisticsRequesterThread.destroy();
 510
 511                 this.statisticsAgerThread.destroy();
 512
 513             }
 514           } catch (Throwable e) {
 515             throw Exceptions.sneakyThrow(e);
 516           }
 517     }
 518
 519 }