openflowplugin-impl/src/main/java/org/opendaylight/openflowplugin/impl/statistics/StatisticsGatheringUtils.java

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, 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.openflowplugin.impl.statistics;
  10
  11 import com.google.common.base.Function;
  12 import com.google.common.base.Optional;
  13 import com.google.common.collect.Iterables;
  14 import com.google.common.util.concurrent.AsyncFunction;
  15 import com.google.common.util.concurrent.CheckedFuture;
  16 import com.google.common.util.concurrent.FutureFallback;
  17 import com.google.common.util.concurrent.Futures;
  18 import com.google.common.util.concurrent.JdkFutureAdapters;
  19 import com.google.common.util.concurrent.ListenableFuture;
  20 import java.text.SimpleDateFormat;
  21 import java.util.Collections;
  22 import java.util.Date;
  23 import java.util.List;
  24 import javax.annotation.Nullable;
  25 import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
  26 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  27 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  28 import org.opendaylight.openflowplugin.api.openflow.device.DeviceContext;
  29 import org.opendaylight.openflowplugin.api.openflow.registry.flow.FlowRegistryKey;
  30 import org.opendaylight.openflowplugin.api.openflow.statistics.ofpspecific.EventIdentifier;
  31 import org.opendaylight.openflowplugin.api.openflow.statistics.ofpspecific.StatisticsGatherer;
  32 import org.opendaylight.openflowplugin.impl.registry.flow.FlowRegistryKeyFactory;
  33 import org.opendaylight.openflowplugin.impl.statistics.ofpspecific.EventsTimeCounter;
  34 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev100924.DateAndTime;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNodeConnector;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableStatisticsGatheringStatus;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableStatisticsGatheringStatusBuilder;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowId;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.meters.Meter;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.meters.MeterBuilder;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.meters.MeterKey;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.snapshot.gathering.status.grouping.SnapshotGatheringStatusEnd;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.snapshot.gathering.status.grouping.SnapshotGatheringStatusEndBuilder;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.snapshot.gathering.status.grouping.SnapshotGatheringStatusStartBuilder;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.Table;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.TableBuilder;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.TableKey;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.Flow;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.FlowBuilder;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.FlowKey;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.FlowStatisticsData;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.FlowStatisticsDataBuilder;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.FlowsStatisticsUpdate;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.flow.and.statistics.map.list.FlowAndStatisticsMapList;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.flow.statistics.FlowStatisticsBuilder;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.table.statistics.rev131215.FlowTableStatisticsData;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.table.statistics.rev131215.FlowTableStatisticsUpdate;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.table.statistics.rev131215.flow.table.and.statistics.map.FlowTableAndStatisticsMap;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.table.statistics.rev131215.flow.table.statistics.FlowTableStatistics;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.table.statistics.rev131215.flow.table.statistics.FlowTableStatisticsBuilder;
  62 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.port.rev130925.queues.Queue;
  63 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.port.rev130925.queues.QueueBuilder;
  64 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.port.rev130925.queues.QueueKey;
  65 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.GroupDescStatsUpdated;
  66 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.GroupStatisticsUpdated;
  67 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.NodeGroupStatistics;
  68 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.NodeGroupStatisticsBuilder;
  69 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.group.statistics.GroupStatistics;
  70 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.group.statistics.GroupStatisticsBuilder;
  71 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.GroupId;
  72 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.group.desc.stats.reply.GroupDescStats;
  73 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.group.statistics.reply.GroupStats;
  74 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.groups.Group;
  75 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.groups.GroupBuilder;
  76 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.groups.GroupKey;
  77 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.node.NodeConnector;
  78 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.node.NodeConnectorKey;
  79 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
  80 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.statistics.rev131111.MeterConfigStatsUpdated;
  81 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.statistics.rev131111.MeterStatisticsUpdated;
  82 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.statistics.rev131111.NodeMeterStatistics;
  83 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.statistics.rev131111.NodeMeterStatisticsBuilder;
  84 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.statistics.rev131111.nodes.node.meter.MeterStatistics;
  85 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.statistics.rev131111.nodes.node.meter.MeterStatisticsBuilder;
  86 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.types.rev130918.MeterId;
  87 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.types.rev130918.meter.config.stats.reply.MeterConfigStats;
  88 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.types.rev130918.meter.statistics.reply.MeterStats;
  89 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.MultipartType;
  90 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.MultipartReply;
  91 import org.opendaylight.yang.gen.v1.urn.opendaylight.port.statistics.rev131214.FlowCapableNodeConnectorStatisticsData;
  92 import org.opendaylight.yang.gen.v1.urn.opendaylight.port.statistics.rev131214.NodeConnectorStatisticsUpdate;
  93 import org.opendaylight.yang.gen.v1.urn.opendaylight.port.statistics.rev131214.flow.capable.node.connector.statistics.FlowCapableNodeConnectorStatistics;
  94 import org.opendaylight.yang.gen.v1.urn.opendaylight.port.statistics.rev131214.flow.capable.node.connector.statistics.FlowCapableNodeConnectorStatisticsBuilder;
  95 import org.opendaylight.yang.gen.v1.urn.opendaylight.port.statistics.rev131214.node.connector.statistics.and.port.number.map.NodeConnectorStatisticsAndPortNumberMap;
  96 import org.opendaylight.yang.gen.v1.urn.opendaylight.queue.statistics.rev131216.FlowCapableNodeConnectorQueueStatisticsData;
  97 import org.opendaylight.yang.gen.v1.urn.opendaylight.queue.statistics.rev131216.FlowCapableNodeConnectorQueueStatisticsDataBuilder;
  98 import org.opendaylight.yang.gen.v1.urn.opendaylight.queue.statistics.rev131216.QueueStatisticsUpdate;
  99 import org.opendaylight.yang.gen.v1.urn.opendaylight.queue.statistics.rev131216.flow.capable.node.connector.queue.statistics.FlowCapableNodeConnectorQueueStatistics;
 100 import org.opendaylight.yang.gen.v1.urn.opendaylight.queue.statistics.rev131216.flow.capable.node.connector.queue.statistics.FlowCapableNodeConnectorQueueStatisticsBuilder;
 101 import org.opendaylight.yang.gen.v1.urn.opendaylight.queue.statistics.rev131216.queue.id.and.statistics.map.QueueIdAndStatisticsMap;
 102 import org.opendaylight.yangtools.yang.binding.DataObject;
 103 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
 104 import org.opendaylight.yangtools.yang.common.RpcResult;
 105 import org.slf4j.Logger;
 106 import org.slf4j.LoggerFactory;
 107
 108 /**
 109  * Created by Martin Bobak &lt;mbobak@cisco.com&gt; on 2.4.2015.
 110  */
 111 public final class StatisticsGatheringUtils {
 112
 113     public static String DATE_AND_TIME_FORMAT = "yyyy-MM-dd'T'HH:mm:ss.SSSXXX";
 114
 115     private static final Logger LOG = LoggerFactory.getLogger(StatisticsGatheringUtils.class);
 116     private static final SinglePurposeMultipartReplyTranslator MULTIPART_REPLY_TRANSLATOR = new SinglePurposeMultipartReplyTranslator();
 117     public static final String QUEUE2_REQCTX = "QUEUE2REQCTX-";
 118
 119     private StatisticsGatheringUtils() {
 120         throw new IllegalStateException("This class should not be instantiated.");
 121     }
 122
 123
 124     public static ListenableFuture<Boolean> gatherStatistics(final StatisticsGatherer statisticsGatheringService,
 125                                                              final DeviceContext deviceContext,
 126                                                              final MultipartType type) {
 127         final String deviceId = deviceContext.getPrimaryConnectionContext().getNodeId().toString();
 128         EventIdentifier wholeProcessEventIdentifier = null;
 129         if (MultipartType.OFPMPFLOW.equals(type)) {
 130             wholeProcessEventIdentifier = new EventIdentifier(type.toString(), deviceId);
 131             EventsTimeCounter.markStart(wholeProcessEventIdentifier);
 132         }
 133         final EventIdentifier ofpQueuToRequestContextEventIdentifier = new EventIdentifier(QUEUE2_REQCTX + type.toString(), deviceId);
 134         final ListenableFuture<RpcResult<List<MultipartReply>>> statisticsDataInFuture =
 135                 JdkFutureAdapters.listenInPoolThread(statisticsGatheringService.getStatisticsOfType(
 136                         ofpQueuToRequestContextEventIdentifier, type));
 137         return transformAndStoreStatisticsData(statisticsDataInFuture, deviceContext, wholeProcessEventIdentifier, type);
 138     }
 139
 140     private static ListenableFuture<Boolean> transformAndStoreStatisticsData(final ListenableFuture<RpcResult<List<MultipartReply>>> statisticsDataInFuture,
 141                                                                              final DeviceContext deviceContext,
 142                                                                              final EventIdentifier eventIdentifier, final MultipartType type) {
 143         return Futures.transform(statisticsDataInFuture, new AsyncFunction<RpcResult<List<MultipartReply>>, Boolean>() {
 144             @Nullable
 145             @Override
 146             public ListenableFuture<Boolean> apply(final RpcResult<List<MultipartReply>> rpcResult) {
 147                 boolean isMultipartProcessed = Boolean.TRUE;
 148                 if (rpcResult.isSuccessful()) {
 149                     LOG.debug("Stats reply successfully received for node {} of type {}", deviceContext.getDeviceState().getNodeId(), type);
 150
 151                     // TODO: in case the result value is null then multipart data probably got processed on the fly -
 152                     // TODO: this contract should by clearly stated and enforced - now simple true value is returned
 153                     if (null != rpcResult.getResult()) {
 154                         Iterable<? extends DataObject> allMultipartData = Collections.emptyList();
 155                         DataObject multipartData = null;
 156
 157
 158                         try {
 159                             for (final MultipartReply singleReply : rpcResult.getResult()) {
 160                                 final List<? extends DataObject> multipartDataList = MULTIPART_REPLY_TRANSLATOR.translate(deviceContext, singleReply);
 161                                 multipartData = multipartDataList.get(0);
 162                                 allMultipartData = Iterables.concat(allMultipartData, multipartDataList);
 163                             }
 164                         } catch (final Exception e) {
 165                             LOG.warn("stats processing of type {} for node {} failed during transfomation step",
 166                                     type, deviceContext.getDeviceState().getNodeId(), e);
 167                             return Futures.immediateFailedFuture(e);
 168                         }
 169
 170
 171                         try {
 172                             if (multipartData instanceof GroupStatisticsUpdated) {
 173                                 processGroupStatistics((Iterable<GroupStatisticsUpdated>) allMultipartData, deviceContext);
 174                             } else if (multipartData instanceof MeterStatisticsUpdated) {
 175                                 processMetersStatistics((Iterable<MeterStatisticsUpdated>) allMultipartData, deviceContext);
 176                             } else if (multipartData instanceof NodeConnectorStatisticsUpdate) {
 177                                 processNodeConnectorStatistics((Iterable<NodeConnectorStatisticsUpdate>) allMultipartData, deviceContext);
 178                             } else if (multipartData instanceof FlowTableStatisticsUpdate) {
 179                                 processFlowTableStatistics((Iterable<FlowTableStatisticsUpdate>) allMultipartData, deviceContext);
 180                             } else if (multipartData instanceof QueueStatisticsUpdate) {
 181                                 processQueueStatistics((Iterable<QueueStatisticsUpdate>) allMultipartData, deviceContext);
 182                             } else if (multipartData instanceof FlowsStatisticsUpdate) {
 183                                 /* FlowStat Processing is realized by NettyThread only by initPhase, otherwise it is realized
 184                                  * by MD-SAL thread */
 185                                 return processFlowStatistics((Iterable<FlowsStatisticsUpdate>) allMultipartData, deviceContext, eventIdentifier);
 186
 187                             } else if (multipartData instanceof GroupDescStatsUpdated) {
 188                                 processGroupDescStats((Iterable<GroupDescStatsUpdated>) allMultipartData, deviceContext);
 189                             } else if (multipartData instanceof MeterConfigStatsUpdated) {
 190                                 processMeterConfigStatsUpdated((Iterable<MeterConfigStatsUpdated>) allMultipartData, deviceContext);
 191                             } else {
 192                                 isMultipartProcessed = Boolean.FALSE;
 193                             }
 194                         } catch (final Exception e) {
 195                             LOG.warn("stats processing of type {} for node {} failed during write-to-tx step",
 196                                     type, deviceContext.getDeviceState().getNodeId(), e);
 197                             return Futures.immediateFailedFuture(e);
 198                         }
 199
 200                         LOG.debug("Stats reply added to transaction for node {} of type {}", deviceContext.getDeviceState().getNodeId(), type);
 201
 202                         //TODO : implement experimenter
 203                     } else {
 204                         LOG.debug("Stats reply was empty for node {} of type {}", deviceContext.getDeviceState().getNodeId(), type);
 205                     }
 206
 207                 } else {
 208                     LOG.debug("Stats reply FAILED for node {} of type {}: {}", deviceContext.getDeviceState().getNodeId(), type, rpcResult.getErrors());
 209                     isMultipartProcessed = Boolean.FALSE;
 210                 }
 211                 return Futures.immediateFuture(isMultipartProcessed);
 212             }
 213         });
 214     }
 215
 216     private static void processMeterConfigStatsUpdated(final Iterable<MeterConfigStatsUpdated> data, final DeviceContext deviceContext) throws Exception {
 217         final InstanceIdentifier<FlowCapableNode> fNodeIdent = assembleFlowCapableNodeInstanceIdentifier(deviceContext);
 218         deleteAllKnownMeters(deviceContext, fNodeIdent);
 219         for (final MeterConfigStatsUpdated meterConfigStatsUpdated : data) {
 220             for (final MeterConfigStats meterConfigStats : meterConfigStatsUpdated.getMeterConfigStats()) {
 221                 final MeterId meterId = meterConfigStats.getMeterId();
 222                 final InstanceIdentifier<Meter> meterInstanceIdentifier = fNodeIdent.child(Meter.class, new MeterKey(meterId));
 223
 224                 final MeterBuilder meterBuilder = new MeterBuilder(meterConfigStats);
 225                 meterBuilder.setKey(new MeterKey(meterId));
 226                 meterBuilder.addAugmentation(NodeMeterStatistics.class, new NodeMeterStatisticsBuilder().build());
 227                 deviceContext.getDeviceMeterRegistry().store(meterId);
 228                 deviceContext.writeToTransaction(LogicalDatastoreType.OPERATIONAL, meterInstanceIdentifier, meterBuilder.build());
 229             }
 230         }
 231         deviceContext.submitTransaction();
 232     }
 233
 234     private static ListenableFuture<Boolean> processFlowStatistics(final Iterable<FlowsStatisticsUpdate> data,
 235                                                                    final DeviceContext deviceContext, final EventIdentifier eventIdentifier) {
 236         final ListenableFuture<Void> deleFuture = deleteAllKnownFlows(deviceContext);
 237         return Futures.transform(deleFuture, new Function<Void, Boolean>() {
 238
 239             @Override
 240             public Boolean apply(final Void input) {
 241                 writeFlowStatistics(data, deviceContext);
 242                 deviceContext.submitTransaction();
 243                 EventsTimeCounter.markEnd(eventIdentifier);
 244                 return Boolean.TRUE;
 245             }
 246         });
 247     }
 248
 249     public static void writeFlowStatistics(final Iterable<FlowsStatisticsUpdate> data, final DeviceContext deviceContext) {
 250         final InstanceIdentifier<FlowCapableNode> fNodeIdent = assembleFlowCapableNodeInstanceIdentifier(deviceContext);
 251         try {
 252             for (final FlowsStatisticsUpdate flowsStatistics : data) {
 253                 for (final FlowAndStatisticsMapList flowStat : flowsStatistics.getFlowAndStatisticsMapList()) {
 254                     final FlowBuilder flowBuilder = new FlowBuilder(flowStat);
 255                     flowBuilder.addAugmentation(FlowStatisticsData.class, refineFlowStatisticsAugmentation(flowStat).build());
 256
 257                     final short tableId = flowStat.getTableId();
 258                     final FlowRegistryKey flowRegistryKey = FlowRegistryKeyFactory.create(flowBuilder.build());
 259                     final FlowId flowId = deviceContext.getDeviceFlowRegistry().storeIfNecessary(flowRegistryKey, tableId);
 260
 261                     final FlowKey flowKey = new FlowKey(flowId);
 262                     flowBuilder.setKey(flowKey);
 263                     final TableKey tableKey = new TableKey(tableId);
 264                     final InstanceIdentifier<Flow> flowIdent = fNodeIdent.child(Table.class, tableKey).child(Flow.class, flowKey);
 265                     deviceContext.writeToTransaction(LogicalDatastoreType.OPERATIONAL, flowIdent, flowBuilder.build());
 266                 }
 267             }
 268         } catch (Exception e) {
 269             LOG.warn("Not able to write to transaction: {}", e.getMessage());
 270         }
 271     }
 272
 273     /**
 274      * Method extracts flow statistics out of flowAndStatistics model
 275      *
 276      * @param flowAndStats
 277      */
 278     private static FlowStatisticsDataBuilder refineFlowStatisticsAugmentation(final FlowAndStatisticsMapList flowAndStats) {
 279         final FlowStatisticsBuilder flowStatisticsBuilder = new FlowStatisticsBuilder(flowAndStats);
 280         final FlowStatisticsDataBuilder flowStatisticsDataBld = new FlowStatisticsDataBuilder();
 281         flowStatisticsDataBld.setFlowStatistics(flowStatisticsBuilder.build());
 282         return flowStatisticsDataBld;
 283     }
 284
 285     public static ListenableFuture<Void> deleteAllKnownFlows(final DeviceContext deviceContext) {
 286         /* DeviceState.deviceSynchronized is a marker for actual phase - false means initPhase, true means noInitPhase */
 287         if (deviceContext.getDeviceState().deviceSynchronized()) {
 288             final InstanceIdentifier<FlowCapableNode> flowCapableNodePath = assembleFlowCapableNodeInstanceIdentifier(deviceContext);
 289             final ReadOnlyTransaction readTx = deviceContext.getReadTransaction();
 290             final CheckedFuture<Optional<FlowCapableNode>, ReadFailedException> flowCapableNodeFuture = readTx.read(
 291                     LogicalDatastoreType.OPERATIONAL, flowCapableNodePath);
 292
 293             /* we wish to close readTx for fallBack */
 294             Futures.withFallback(flowCapableNodeFuture, new FutureFallback<Optional<FlowCapableNode>>() {
 295
 296                 @Override
 297                 public ListenableFuture<Optional<FlowCapableNode>> create(final Throwable t) throws Exception {
 298                     readTx.close();
 299                     return Futures.immediateFailedFuture(t);
 300                 }
 301             });
 302             /*
 303              * we have to read actual tables with all information before we set empty Flow list, merge is expensive and
 304              * not applicable for lists
 305              */
 306             return Futures.transform(flowCapableNodeFuture, new AsyncFunction<Optional<FlowCapableNode>, Void>() {
 307
 308                 @Override
 309                 public ListenableFuture<Void> apply(final Optional<FlowCapableNode> flowCapNodeOpt) throws Exception {
 310                     if (flowCapNodeOpt.isPresent()) {
 311                         for (final Table tableData : flowCapNodeOpt.get().getTable()) {
 312                             final Table table = new TableBuilder(tableData).setFlow(Collections.<Flow>emptyList()).build();
 313                             final InstanceIdentifier<Table> iiToTable = flowCapableNodePath.child(Table.class, tableData.getKey());
 314                             deviceContext.writeToTransaction(LogicalDatastoreType.OPERATIONAL, iiToTable, table);
 315                         }
 316                     }
 317                     deviceContext.getDeviceFlowRegistry().removeMarked();
 318                     readTx.close();
 319                     return Futures.immediateFuture(null);
 320                 }
 321
 322             });
 323         }
 324         return Futures.immediateFuture(null);
 325     }
 326
 327     private static void processQueueStatistics(final Iterable<QueueStatisticsUpdate> data, final DeviceContext deviceContext) throws Exception {
 328         // TODO: clean all queues of all node-connectors before writing up-to-date stats
 329         final InstanceIdentifier<Node> nodeIdent = deviceContext.getDeviceState().getNodeInstanceIdentifier();
 330         for (final QueueStatisticsUpdate queueStatisticsUpdate : data) {
 331             for (final QueueIdAndStatisticsMap queueStat : queueStatisticsUpdate.getQueueIdAndStatisticsMap()) {
 332                 if (queueStat.getQueueId() != null) {
 333                     final FlowCapableNodeConnectorQueueStatistics statChild =
 334                             new FlowCapableNodeConnectorQueueStatisticsBuilder(queueStat).build();
 335                     final FlowCapableNodeConnectorQueueStatisticsDataBuilder statBuild =
 336                             new FlowCapableNodeConnectorQueueStatisticsDataBuilder();
 337                     statBuild.setFlowCapableNodeConnectorQueueStatistics(statChild);
 338                     final QueueKey qKey = new QueueKey(queueStat.getQueueId());
 339                     final InstanceIdentifier<Queue> queueIdent = nodeIdent
 340                             .child(NodeConnector.class, new NodeConnectorKey(queueStat.getNodeConnectorId()))
 341                             .augmentation(FlowCapableNodeConnector.class)
 342                             .child(Queue.class, qKey);
 343                     final QueueBuilder queueBuilder = new QueueBuilder()
 344                             .setKey(qKey)
 345                             .setQueueId(queueStat.getQueueId())
 346                             // node-connector-id is already contained in parent node and the port-id here is of incompatible format
 347                             .addAugmentation(FlowCapableNodeConnectorQueueStatisticsData.class, statBuild.build());
 348                     deviceContext.writeToTransaction(LogicalDatastoreType.OPERATIONAL, queueIdent, queueBuilder.build());
 349                 }
 350             }
 351         }
 352         deviceContext.submitTransaction();
 353     }
 354
 355     private static void processFlowTableStatistics(final Iterable<FlowTableStatisticsUpdate> data, final DeviceContext deviceContext) throws Exception {
 356         final InstanceIdentifier<FlowCapableNode> fNodeIdent = assembleFlowCapableNodeInstanceIdentifier(deviceContext);
 357         for (final FlowTableStatisticsUpdate flowTableStatisticsUpdate : data) {
 358
 359             for (final FlowTableAndStatisticsMap tableStat : flowTableStatisticsUpdate.getFlowTableAndStatisticsMap()) {
 360                 final InstanceIdentifier<FlowTableStatistics> tStatIdent = fNodeIdent.child(Table.class, new TableKey(tableStat.getTableId().getValue()))
 361                         .augmentation(FlowTableStatisticsData.class).child(FlowTableStatistics.class);
 362                 final FlowTableStatistics stats = new FlowTableStatisticsBuilder(tableStat).build();
 363                 deviceContext.writeToTransaction(LogicalDatastoreType.OPERATIONAL, tStatIdent, stats);
 364             }
 365         }
 366         deviceContext.submitTransaction();
 367     }
 368
 369     private static void processNodeConnectorStatistics(final Iterable<NodeConnectorStatisticsUpdate> data, final DeviceContext deviceContext) throws Exception {
 370         final InstanceIdentifier<Node> nodeIdent = deviceContext.getDeviceState().getNodeInstanceIdentifier();
 371         for (final NodeConnectorStatisticsUpdate nodeConnectorStatisticsUpdate : data) {
 372             for (final NodeConnectorStatisticsAndPortNumberMap nConnectPort : nodeConnectorStatisticsUpdate.getNodeConnectorStatisticsAndPortNumberMap()) {
 373                 final FlowCapableNodeConnectorStatistics stats = new FlowCapableNodeConnectorStatisticsBuilder(nConnectPort).build();
 374                 final NodeConnectorKey key = new NodeConnectorKey(nConnectPort.getNodeConnectorId());
 375                 final InstanceIdentifier<NodeConnector> nodeConnectorIdent = nodeIdent.child(NodeConnector.class, key);
 376                 final InstanceIdentifier<FlowCapableNodeConnectorStatisticsData> nodeConnStatIdent = nodeConnectorIdent
 377                         .augmentation(FlowCapableNodeConnectorStatisticsData.class);
 378                 final InstanceIdentifier<FlowCapableNodeConnectorStatistics> flowCapNodeConnStatIdent =
 379                         nodeConnStatIdent.child(FlowCapableNodeConnectorStatistics.class);
 380                 deviceContext.writeToTransaction(LogicalDatastoreType.OPERATIONAL, flowCapNodeConnStatIdent, stats);
 381             }
 382         }
 383         deviceContext.submitTransaction();
 384     }
 385
 386     private static void processMetersStatistics(final Iterable<MeterStatisticsUpdated> data,
 387                                                 final DeviceContext deviceContext) throws Exception {
 388         final InstanceIdentifier<FlowCapableNode> fNodeIdent = assembleFlowCapableNodeInstanceIdentifier(deviceContext);
 389         for (final MeterStatisticsUpdated meterStatisticsUpdated : data) {
 390             for (final MeterStats mStat : meterStatisticsUpdated.getMeterStats()) {
 391                 final MeterStatistics stats = new MeterStatisticsBuilder(mStat).build();
 392                 final MeterId meterId = mStat.getMeterId();
 393                 final InstanceIdentifier<Meter> meterIdent = fNodeIdent.child(Meter.class, new MeterKey(meterId));
 394                 final InstanceIdentifier<NodeMeterStatistics> nodeMeterStatIdent = meterIdent
 395                         .augmentation(NodeMeterStatistics.class);
 396                 final InstanceIdentifier<MeterStatistics> msIdent = nodeMeterStatIdent.child(MeterStatistics.class);
 397                 deviceContext.writeToTransaction(LogicalDatastoreType.OPERATIONAL, msIdent, stats);
 398             }
 399         }
 400         deviceContext.submitTransaction();
 401     }
 402
 403     private static void deleteAllKnownMeters(final DeviceContext deviceContext, final InstanceIdentifier<FlowCapableNode> fNodeIdent) throws Exception {
 404         for (final MeterId meterId : deviceContext.getDeviceMeterRegistry().getAllMeterIds()) {
 405             final InstanceIdentifier<Meter> meterIdent = fNodeIdent.child(Meter.class, new MeterKey(meterId));
 406             deviceContext.addDeleteToTxChain(LogicalDatastoreType.OPERATIONAL, meterIdent);
 407         }
 408         deviceContext.getDeviceMeterRegistry().removeMarked();
 409     }
 410
 411     private static void processGroupDescStats(final Iterable<GroupDescStatsUpdated> data, final DeviceContext deviceContext) throws Exception {
 412         final InstanceIdentifier<FlowCapableNode> fNodeIdent =
 413                 deviceContext.getDeviceState().getNodeInstanceIdentifier().augmentation(FlowCapableNode.class);
 414         deleteAllKnownGroups(deviceContext, fNodeIdent);
 415
 416         for (final GroupDescStatsUpdated groupDescStatsUpdated : data) {
 417             for (final GroupDescStats groupDescStats : groupDescStatsUpdated.getGroupDescStats()) {
 418                 final GroupId groupId = groupDescStats.getGroupId();
 419
 420                 final GroupBuilder groupBuilder = new GroupBuilder(groupDescStats);
 421                 groupBuilder.setKey(new GroupKey(groupId));
 422                 groupBuilder.addAugmentation(NodeGroupStatistics.class, new NodeGroupStatisticsBuilder().build());
 423
 424                 final InstanceIdentifier<Group> groupIdent = fNodeIdent.child(Group.class, new GroupKey(groupId));
 425
 426                 deviceContext.getDeviceGroupRegistry().store(groupId);
 427                 deviceContext.writeToTransaction(LogicalDatastoreType.OPERATIONAL, groupIdent, groupBuilder.build());
 428             }
 429         }
 430         deviceContext.submitTransaction();
 431     }
 432
 433     private static void deleteAllKnownGroups(final DeviceContext deviceContext, final InstanceIdentifier<FlowCapableNode> fNodeIdent) throws Exception {
 434         for (final GroupId groupId : deviceContext.getDeviceGroupRegistry().getAllGroupIds()) {
 435             final InstanceIdentifier<Group> groupIdent = fNodeIdent.child(Group.class, new GroupKey(groupId));
 436             deviceContext.addDeleteToTxChain(LogicalDatastoreType.OPERATIONAL, groupIdent);
 437         }
 438         deviceContext.getDeviceGroupRegistry().removeMarked();
 439     }
 440
 441     private static void processGroupStatistics(final Iterable<GroupStatisticsUpdated> data, final DeviceContext deviceContext) throws Exception {
 442         final InstanceIdentifier<FlowCapableNode> fNodeIdent = assembleFlowCapableNodeInstanceIdentifier(deviceContext);
 443         for (final GroupStatisticsUpdated groupStatistics : data) {
 444             for (final GroupStats groupStats : groupStatistics.getGroupStats()) {
 445
 446                 final InstanceIdentifier<Group> groupIdent = fNodeIdent.child(Group.class, new GroupKey(groupStats.getGroupId()));
 447                 final InstanceIdentifier<NodeGroupStatistics> nGroupStatIdent = groupIdent
 448                         .augmentation(NodeGroupStatistics.class);
 449
 450                 final InstanceIdentifier<GroupStatistics> gsIdent = nGroupStatIdent.child(GroupStatistics.class);
 451                 final GroupStatistics stats = new GroupStatisticsBuilder(groupStats).build();
 452                 deviceContext.writeToTransaction(LogicalDatastoreType.OPERATIONAL, gsIdent, stats);
 453             }
 454         }
 455         deviceContext.submitTransaction();
 456     }
 457
 458     private static InstanceIdentifier<FlowCapableNode> assembleFlowCapableNodeInstanceIdentifier(final DeviceContext deviceContext) {
 459         return deviceContext.getDeviceState().getNodeInstanceIdentifier().augmentation(FlowCapableNode.class);
 460     }
 461
 462     /**
 463      * Writes snapshot gathering start timestamp + cleans end mark
 464      *
 465      * @param deviceContext txManager + node path keeper
 466      */
 467     static void markDeviceStateSnapshotStart(final DeviceContext deviceContext) {
 468         final InstanceIdentifier<FlowCapableStatisticsGatheringStatus> statusPath = deviceContext.getDeviceState()
 469                 .getNodeInstanceIdentifier().augmentation(FlowCapableStatisticsGatheringStatus.class);
 470
 471         final SimpleDateFormat simpleDateFormat = new SimpleDateFormat(DATE_AND_TIME_FORMAT);
 472         final FlowCapableStatisticsGatheringStatus gatheringStatus = new FlowCapableStatisticsGatheringStatusBuilder()
 473                 .setSnapshotGatheringStatusStart(new SnapshotGatheringStatusStartBuilder()
 474                         .setBegin(new DateAndTime(simpleDateFormat.format(new Date())))
 475                         .build())
 476                 .setSnapshotGatheringStatusEnd(null) // TODO: reconsider if really need to clean end mark here
 477                 .build();
 478         try {
 479             deviceContext.writeToTransaction(LogicalDatastoreType.OPERATIONAL, statusPath, gatheringStatus);
 480         } catch (final Exception e) {
 481             LOG.warn("Can't write to transaction: {}", e);
 482         }
 483
 484         deviceContext.submitTransaction();
 485     }
 486
 487     /**
 488      * Writes snapshot gathering end timestamp + outcome
 489      *
 490      * @param deviceContext txManager + node path keeper
 491      * @param succeeded     outcome of currently finished gathering
 492      */
 493     static void markDeviceStateSnapshotEnd(final DeviceContext deviceContext, final boolean succeeded) {
 494         final InstanceIdentifier<SnapshotGatheringStatusEnd> statusEndPath = deviceContext.getDeviceState()
 495                 .getNodeInstanceIdentifier().augmentation(FlowCapableStatisticsGatheringStatus.class)
 496                 .child(SnapshotGatheringStatusEnd.class);
 497
 498         final SimpleDateFormat simpleDateFormat = new SimpleDateFormat(DATE_AND_TIME_FORMAT);
 499         final SnapshotGatheringStatusEnd gatheringStatus = new SnapshotGatheringStatusEndBuilder()
 500                 .setEnd(new DateAndTime(simpleDateFormat.format(new Date())))
 501                 .setSucceeded(succeeded)
 502                 .build();
 503         try {
 504             deviceContext.writeToTransaction(LogicalDatastoreType.OPERATIONAL, statusEndPath, gatheringStatus);
 505         } catch (Exception e) {
 506             LOG.warn("Can't write to transaction: {}", e);
 507         }
 508
 509         deviceContext.submitTransaction();
 510     }
 511 }