openflowplugin/src/main/java/org/opendaylight/openflowplugin/openflow/md/core/MDController.java

   1 /**
   2  * Copyright (c) 2013 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.openflow.md.core;
  10
  11 import com.google.common.util.concurrent.ForwardingBlockingQueue;
  12 import com.google.common.util.concurrent.Futures;
  13 import com.google.common.util.concurrent.ListenableFuture;
  14 import com.google.common.util.concurrent.ListeningExecutorService;
  15 import com.google.common.util.concurrent.MoreExecutors;
  16 import java.util.ArrayList;
  17 import java.util.Collection;
  18 import java.util.LinkedHashSet;
  19 import java.util.List;
  20 import java.util.Map;
  21 import java.util.concurrent.BlockingQueue;
  22 import java.util.concurrent.ConcurrentHashMap;
  23 import java.util.concurrent.ConcurrentMap;
  24 import java.util.concurrent.ExecutionException;
  25 import java.util.concurrent.Future;
  26 import java.util.concurrent.LinkedBlockingQueue;
  27 import java.util.concurrent.RejectedExecutionException;
  28 import java.util.concurrent.RejectedExecutionHandler;
  29 import java.util.concurrent.ThreadPoolExecutor;
  30 import java.util.concurrent.TimeUnit;
  31 import java.util.concurrent.TimeoutException;
  32 import org.opendaylight.openflowjava.protocol.spi.connection.SwitchConnectionProvider;
  33 import org.opendaylight.openflowplugin.api.OFConstants;
  34 import org.opendaylight.openflowplugin.api.openflow.md.core.IMDMessageTranslator;
  35 import org.opendaylight.openflowplugin.api.openflow.md.core.NotificationQueueWrapper;
  36 import org.opendaylight.openflowplugin.api.openflow.md.core.TranslatorKey;
  37 import org.opendaylight.openflowplugin.api.openflow.md.queue.PopListener;
  38 import org.opendaylight.openflowplugin.api.openflow.statistics.MessageSpy;
  39 import org.opendaylight.openflowplugin.extension.api.core.extension.ExtensionConverterProvider;
  40 import org.opendaylight.openflowplugin.openflow.md.core.sal.convertor.ConvertorExecutor;
  41 import org.opendaylight.openflowplugin.openflow.md.core.session.OFSessionUtil;
  42 import org.opendaylight.openflowplugin.openflow.md.core.translator.ErrorTranslator;
  43 import org.opendaylight.openflowplugin.openflow.md.core.translator.ErrorV10Translator;
  44 import org.opendaylight.openflowplugin.openflow.md.core.translator.ExperimenterTranslator;
  45 import org.opendaylight.openflowplugin.openflow.md.core.translator.FeaturesV10ToNodeConnectorUpdatedTranslator;
  46 import org.opendaylight.openflowplugin.openflow.md.core.translator.FlowRemovedTranslator;
  47 import org.opendaylight.openflowplugin.openflow.md.core.translator.MultiPartMessageDescToNodeUpdatedTranslator;
  48 import org.opendaylight.openflowplugin.openflow.md.core.translator.MultiPartReplyPortToNodeConnectorUpdatedTranslator;
  49 import org.opendaylight.openflowplugin.openflow.md.core.translator.MultipartReplyTableFeaturesToTableUpdatedTranslator;
  50 import org.opendaylight.openflowplugin.openflow.md.core.translator.MultipartReplyTranslator;
  51 import org.opendaylight.openflowplugin.openflow.md.core.translator.NotificationPlainTranslator;
  52 import org.opendaylight.openflowplugin.openflow.md.core.translator.PacketInTranslator;
  53 import org.opendaylight.openflowplugin.openflow.md.core.translator.PacketInV10Translator;
  54 import org.opendaylight.openflowplugin.openflow.md.core.translator.PortStatusMessageToNodeConnectorUpdatedTranslator;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.service.rev130819.NodeErrorNotification;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.service.rev130819.SwitchFlowRemoved;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.AggregateFlowStatisticsUpdate;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.FlowsStatisticsUpdate;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.table.statistics.rev131215.FlowTableStatisticsUpdate;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.GroupDescStatsUpdated;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.GroupFeaturesUpdated;
  62 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.GroupStatisticsUpdated;
  63 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeConnectorRemoved;
  64 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeConnectorUpdated;
  65 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeRemoved;
  66 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeUpdated;
  67 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.statistics.rev131111.MeterConfigStatsUpdated;
  68 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.statistics.rev131111.MeterFeaturesUpdated;
  69 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.statistics.rev131111.MeterStatisticsUpdated;
  70 import org.opendaylight.yang.gen.v1.urn.opendaylight.node.error.service.rev140410.BadActionErrorNotification;
  71 import org.opendaylight.yang.gen.v1.urn.opendaylight.node.error.service.rev140410.BadInstructionErrorNotification;
  72 import org.opendaylight.yang.gen.v1.urn.opendaylight.node.error.service.rev140410.BadMatchErrorNotification;
  73 import org.opendaylight.yang.gen.v1.urn.opendaylight.node.error.service.rev140410.BadRequestErrorNotification;
  74 import org.opendaylight.yang.gen.v1.urn.opendaylight.node.error.service.rev140410.ExperimenterErrorNotification;
  75 import org.opendaylight.yang.gen.v1.urn.opendaylight.node.error.service.rev140410.FlowModErrorNotification;
  76 import org.opendaylight.yang.gen.v1.urn.opendaylight.node.error.service.rev140410.GroupModErrorNotification;
  77 import org.opendaylight.yang.gen.v1.urn.opendaylight.node.error.service.rev140410.HelloFailedErrorNotification;
  78 import org.opendaylight.yang.gen.v1.urn.opendaylight.node.error.service.rev140410.MeterModErrorNotification;
  79 import org.opendaylight.yang.gen.v1.urn.opendaylight.node.error.service.rev140410.PortModErrorNotification;
  80 import org.opendaylight.yang.gen.v1.urn.opendaylight.node.error.service.rev140410.QueueOpErrorNotification;
  81 import org.opendaylight.yang.gen.v1.urn.opendaylight.node.error.service.rev140410.RoleRequestErrorNotification;
  82 import org.opendaylight.yang.gen.v1.urn.opendaylight.node.error.service.rev140410.SwitchConfigErrorNotification;
  83 import org.opendaylight.yang.gen.v1.urn.opendaylight.node.error.service.rev140410.TableFeaturesErrorNotification;
  84 import org.opendaylight.yang.gen.v1.urn.opendaylight.node.error.service.rev140410.TableModErrorNotification;
  85 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.ErrorMessage;
  86 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.ExperimenterMessage;
  87 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.FlowRemovedMessage;
  88 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetFeaturesOutput;
  89 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.MultipartReplyMessage;
  90 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.OfHeader;
  91 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessage;
  92 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PortStatusMessage;
  93 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.PacketReceived;
  94 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.TransmitPacketInput;
  95 import org.opendaylight.yang.gen.v1.urn.opendaylight.port.statistics.rev131214.NodeConnectorStatisticsUpdate;
  96 import org.opendaylight.yang.gen.v1.urn.opendaylight.queue.statistics.rev131216.QueueStatisticsUpdate;
  97 import org.opendaylight.yang.gen.v1.urn.opendaylight.table.service.rev131026.TableUpdated;
  98 import org.opendaylight.yangtools.yang.binding.DataContainer;
  99 import org.opendaylight.yangtools.yang.binding.DataObject;
 100 import org.slf4j.Logger;
 101 import org.slf4j.LoggerFactory;
 102
 103 /**
 104  *
 105  */
 106 public class MDController implements IMDController, AutoCloseable {
 107
 108     private static final Logger LOG = LoggerFactory.getLogger(MDController.class);
 109     private final ConvertorExecutor convertorExecutor;
 110
 111     private Collection<SwitchConnectionProvider> switchConnectionProviders;
 112
 113     private ConcurrentMap<TranslatorKey, Collection<IMDMessageTranslator<OfHeader, List<DataObject>>>> messageTranslators;
 114     private Map<Class<? extends DataObject>, Collection<PopListener<DataObject>>> popListeners;
 115     private MessageSpy<DataContainer> messageSpyCounter;
 116
 117     final private int OF10 = OFConstants.OFP_VERSION_1_0;
 118     final private int OF13 = OFConstants.OFP_VERSION_1_3;
 119
 120     private ErrorHandlerSimpleImpl errorHandler;
 121
 122     private ExtensionConverterProvider extensionConverterProvider;
 123
 124     public MDController(ConvertorExecutor convertorExecutor) {
 125         this.convertorExecutor = convertorExecutor;
 126     }
 127
 128     /**
 129      * @return translator mapping
 130      */
 131     public Map<TranslatorKey, Collection<IMDMessageTranslator<OfHeader, List<DataObject>>>> getMessageTranslators() {
 132         return messageTranslators;
 133     }
 134
 135     /**
 136      * provisioning of translator mapping
 137      */
 138     public void init() {
 139         LOG.debug("init");
 140
 141         messageTranslators = new ConcurrentHashMap<>();
 142         popListeners = new ConcurrentHashMap<>();
 143         //TODO: move registration to factory
 144         addMessageTranslator(ErrorMessage.class, OF10, new ErrorV10Translator());
 145         addMessageTranslator(ErrorMessage.class, OF13, new ErrorTranslator());
 146         addMessageTranslator(FlowRemovedMessage.class, OF10, new FlowRemovedTranslator(convertorExecutor));
 147         addMessageTranslator(FlowRemovedMessage.class, OF13, new FlowRemovedTranslator(convertorExecutor));
 148         addMessageTranslator(PacketInMessage.class,OF10, new PacketInV10Translator());
 149         addMessageTranslator(PacketInMessage.class,OF13, new PacketInTranslator(convertorExecutor));
 150         addMessageTranslator(PortStatusMessage.class,OF10, new PortStatusMessageToNodeConnectorUpdatedTranslator());
 151         addMessageTranslator(PortStatusMessage.class,OF13, new PortStatusMessageToNodeConnectorUpdatedTranslator());
 152         addMessageTranslator(MultipartReplyMessage.class,OF13,new MultiPartReplyPortToNodeConnectorUpdatedTranslator());
 153         addMessageTranslator(MultipartReplyMessage.class,OF10, new MultiPartMessageDescToNodeUpdatedTranslator());
 154         addMessageTranslator(MultipartReplyMessage.class,OF13, new MultiPartMessageDescToNodeUpdatedTranslator());
 155         addMessageTranslator(ExperimenterMessage.class, OF10, new ExperimenterTranslator());
 156         addMessageTranslator(MultipartReplyMessage.class,OF10, new MultipartReplyTranslator(convertorExecutor));
 157         addMessageTranslator(MultipartReplyMessage.class,OF13, new MultipartReplyTranslator(convertorExecutor));
 158         addMessageTranslator(MultipartReplyMessage.class,OF13,new MultipartReplyTableFeaturesToTableUpdatedTranslator(convertorExecutor));
 159         addMessageTranslator(GetFeaturesOutput.class,OF10, new FeaturesV10ToNodeConnectorUpdatedTranslator());
 160         addMessageTranslator(NotificationQueueWrapper.class, OF10, new NotificationPlainTranslator());
 161         addMessageTranslator(NotificationQueueWrapper.class, OF13, new NotificationPlainTranslator());
 162
 163         NotificationPopListener<DataObject> notificationPopListener = new NotificationPopListener<DataObject>();
 164         notificationPopListener.setNotificationProviderService(
 165                 OFSessionUtil.getSessionManager().getNotificationProviderService());
 166         notificationPopListener.setMessageSpy(messageSpyCounter);
 167
 168         //TODO: move registration to factory
 169         addMessagePopListener(NodeErrorNotification.class, notificationPopListener);
 170         addMessagePopListener(BadActionErrorNotification.class, notificationPopListener);
 171         addMessagePopListener(BadInstructionErrorNotification.class, notificationPopListener);
 172         addMessagePopListener(BadMatchErrorNotification.class, notificationPopListener);
 173         addMessagePopListener(BadRequestErrorNotification.class, notificationPopListener);
 174         addMessagePopListener(ExperimenterErrorNotification.class, notificationPopListener);
 175         addMessagePopListener(FlowModErrorNotification.class, notificationPopListener);
 176         addMessagePopListener(GroupModErrorNotification.class, notificationPopListener);
 177         addMessagePopListener(HelloFailedErrorNotification.class, notificationPopListener);
 178         addMessagePopListener(MeterModErrorNotification.class, notificationPopListener);
 179         addMessagePopListener(PortModErrorNotification.class, notificationPopListener);
 180         addMessagePopListener(QueueOpErrorNotification.class, notificationPopListener);
 181         addMessagePopListener(RoleRequestErrorNotification.class, notificationPopListener);
 182         addMessagePopListener(SwitchConfigErrorNotification.class, notificationPopListener);
 183         addMessagePopListener(TableFeaturesErrorNotification.class, notificationPopListener);
 184         addMessagePopListener(TableModErrorNotification.class, notificationPopListener);
 185         addMessagePopListener(NodeConnectorUpdated.class,notificationPopListener);
 186         addMessagePopListener(NodeConnectorRemoved.class,notificationPopListener);
 187         addMessagePopListener(PacketReceived.class,notificationPopListener);
 188         addMessagePopListener(TransmitPacketInput.class, notificationPopListener);
 189         addMessagePopListener(NodeUpdated.class, notificationPopListener);
 190         addMessagePopListener(NodeRemoved.class, notificationPopListener);
 191
 192         addMessagePopListener(SwitchFlowRemoved.class, notificationPopListener);
 193         addMessagePopListener(TableUpdated.class, notificationPopListener);
 194
 195         //Notification registration for flow statistics
 196         addMessagePopListener(FlowsStatisticsUpdate.class, notificationPopListener);
 197         addMessagePopListener(AggregateFlowStatisticsUpdate.class, notificationPopListener);
 198
 199         //Notification registrations for group-statistics
 200         addMessagePopListener(GroupStatisticsUpdated.class, notificationPopListener);
 201         addMessagePopListener(GroupFeaturesUpdated.class, notificationPopListener);
 202         addMessagePopListener(GroupDescStatsUpdated.class, notificationPopListener);
 203
 204         //Notification registrations for meter-statistics
 205         addMessagePopListener(MeterStatisticsUpdated.class, notificationPopListener);
 206         addMessagePopListener(MeterConfigStatsUpdated.class, notificationPopListener);
 207         addMessagePopListener(MeterFeaturesUpdated.class, notificationPopListener);
 208
 209         //Notification registration for port-statistics
 210         addMessagePopListener(NodeConnectorStatisticsUpdate.class, notificationPopListener);
 211
 212         //Notification registration for flow-table statistics
 213         addMessagePopListener(FlowTableStatisticsUpdate.class, notificationPopListener);
 214
 215         //Notification registration for queue-statistics
 216         addMessagePopListener(QueueStatisticsUpdate.class, notificationPopListener);
 217
 218         // Push the updated Listeners to Session Manager which will be then picked up by ConnectionConductor eventually
 219         OFSessionUtil.getSessionManager().setTranslatorMapping(messageTranslators);
 220         OFSessionUtil.getSessionManager().setPopListenerMapping(popListeners);
 221         OFSessionUtil.getSessionManager().setMessageSpy(messageSpyCounter);
 222
 223         // prepare worker pool for rpc
 224         // TODO: get size from configSubsystem
 225         int rpcThreadLimit = 10;
 226         ListeningExecutorService rpcPoolDelegator = createRpcPoolSpyDecorated(rpcThreadLimit, messageSpyCounter);
 227         OFSessionUtil.getSessionManager().setRpcPool(rpcPoolDelegator);
 228         OFSessionUtil.getSessionManager().setExtensionConverterProvider(extensionConverterProvider);
 229
 230     }
 231
 232     /**
 233      * @param rpcThreadLimit
 234      * @param messageSpy
 235      * @return
 236      */
 237     private static ListeningExecutorService createRpcPoolSpyDecorated(final int rpcThreadLimit, final MessageSpy<DataContainer> messageSpy) {
 238         final BlockingQueue<Runnable> delegate = new LinkedBlockingQueue<>(100000);
 239         final BlockingQueue<Runnable> queue = new ForwardingBlockingQueue<Runnable>() {
 240             @Override
 241             protected BlockingQueue<Runnable> delegate() {
 242                 return delegate;
 243             }
 244
 245             @Override
 246             public boolean offer(final Runnable r) {
 247                 // ThreadPoolExecutor will spawn a new thread after core size is reached only
 248                 // if the queue.offer returns false.
 249                 return false;
 250             }
 251         };
 252
 253         ThreadPoolLoggingExecutor rpcPool = new ThreadPoolLoggingExecutor(rpcThreadLimit, rpcThreadLimit, 0L,
 254                 TimeUnit.MILLISECONDS, queue, "OFRpc");
 255         rpcPool.setRejectedExecutionHandler(new RejectedExecutionHandler() {
 256                         @Override
 257                         public void rejectedExecution(final Runnable r, final ThreadPoolExecutor executor) {
 258                                 try {
 259                                         executor.getQueue().put(r);
 260                                 } catch (InterruptedException e) {
 261                                         throw new RejectedExecutionException("Interrupted while waiting on queue", e);
 262                                 }
 263
 264                         }
 265                 });
 266         ListeningExecutorService listeningRpcPool = MoreExecutors.listeningDecorator(rpcPool);
 267         RpcListeningExecutorService rpcPoolDecorated = new RpcListeningExecutorService(listeningRpcPool);
 268         rpcPoolDecorated.setMessageSpy(messageSpy);
 269         return rpcPoolDecorated;
 270     }
 271
 272     /**
 273      * @param switchConnectionProviders
 274      *            the switchConnectionProviders to set
 275      */
 276     public void setSwitchConnectionProviders(final Collection<SwitchConnectionProvider> switchConnectionProviders) {
 277         this.switchConnectionProviders = switchConnectionProviders;
 278     }
 279
 280     /**
 281      * Function called by dependency manager after "init ()" is called and after
 282      * the services provided by the class are registered in the service registry
 283      *
 284      */
 285     public void start() {
 286         LOG.debug("starting ..");
 287         LOG.debug("switchConnectionProvider: " + switchConnectionProviders);
 288         // setup handler
 289         SwitchConnectionHandlerImpl switchConnectionHandler = new SwitchConnectionHandlerImpl();
 290         switchConnectionHandler.setMessageSpy(messageSpyCounter);
 291
 292         errorHandler = new ErrorHandlerSimpleImpl();
 293
 294         switchConnectionHandler.setErrorHandler(errorHandler);
 295         switchConnectionHandler.init();
 296
 297         List<ListenableFuture<Boolean>> starterChain = new ArrayList<>(switchConnectionProviders.size());
 298         for (SwitchConnectionProvider switchConnectionPrv : switchConnectionProviders) {
 299             switchConnectionPrv.setSwitchConnectionHandler(switchConnectionHandler);
 300             ListenableFuture<Boolean> isOnlineFuture = switchConnectionPrv.startup();
 301             starterChain.add(isOnlineFuture);
 302         }
 303
 304         Future<List<Boolean>> srvStarted = Futures.allAsList(starterChain);
 305     }
 306
 307     /**
 308      * Function called by the dependency manager before the services exported by
 309      * the component are unregistered, this will be followed by a "destroy ()"
 310      * calls
 311      *
 312      */
 313     public void stop() {
 314         LOG.debug("stopping");
 315         List<ListenableFuture<Boolean>> stopChain = new ArrayList<>(switchConnectionProviders.size());
 316         try {
 317             for (SwitchConnectionProvider switchConnectionPrv : switchConnectionProviders) {
 318                 ListenableFuture<Boolean> shutdown =  switchConnectionPrv.shutdown();
 319                 stopChain.add(shutdown);
 320             }
 321             Futures.allAsList(stopChain).get(5000, TimeUnit.MILLISECONDS);
 322         } catch (InterruptedException | ExecutionException | TimeoutException e) {
 323             LOG.warn("failed to stop MDController: {}", e.getMessage());
 324             LOG.debug("failed to stop MDController.. ", e);
 325         }
 326         close();
 327     }
 328
 329     /**
 330      * Function called by the dependency manager when at least one dependency
 331      * become unsatisfied or when the component is shutting down because for
 332      * example bundle is being stopped.
 333      *
 334      */
 335     public void destroy() {
 336         close();
 337     }
 338
 339     @Override
 340     public void addMessageTranslator(final Class<? extends DataObject> messageType, final int version, final IMDMessageTranslator<OfHeader, List<DataObject>> translator) {
 341         TranslatorKey tKey = new TranslatorKey(version, messageType.getName());
 342
 343         Collection<IMDMessageTranslator<OfHeader, List<DataObject>>> existingValues = messageTranslators.get(tKey);
 344         if (existingValues == null) {
 345             existingValues = new LinkedHashSet<>();
 346             messageTranslators.put(tKey, existingValues);
 347         }
 348         existingValues.add(translator);
 349         LOG.debug("{} is now translated by {}", messageType, translator);
 350     }
 351
 352     @Override
 353     public void removeMessageTranslator(final Class<? extends DataObject> messageType, final int version, final IMDMessageTranslator<OfHeader, List<DataObject>> translator) {
 354         TranslatorKey tKey = new TranslatorKey(version, messageType.getName());
 355         Collection<IMDMessageTranslator<OfHeader, List<DataObject>>> values = messageTranslators.get(tKey);
 356         if (values != null) {
 357             values.remove(translator);
 358             if (values.isEmpty()) {
 359                 messageTranslators.remove(tKey);
 360             }
 361             LOG.debug("{} is now removed from translators", translator);
 362          }
 363     }
 364
 365     @Override
 366     public void addMessagePopListener(final Class<? extends DataObject> messageType, final PopListener<DataObject> popListener) {
 367         Collection<PopListener<DataObject>> existingValues = popListeners.get(messageType);
 368         if (existingValues == null) {
 369             existingValues = new LinkedHashSet<>();
 370             popListeners.put(messageType, existingValues);
 371         }
 372         existingValues.add(popListener);
 373         LOG.debug("{} is now popListened by {}", messageType, popListener);
 374     }
 375
 376     @Override
 377     public void removeMessagePopListener(final Class<? extends DataObject> messageType, final PopListener<DataObject> popListener) {
 378         Collection<PopListener<DataObject>> values = popListeners.get(messageType);
 379         if (values != null) {
 380             values.remove(popListener);
 381             if (values.isEmpty()) {
 382                 popListeners.remove(messageType);
 383             }
 384             LOG.debug("{} is now removed from popListeners", popListener);
 385          }
 386     }
 387
 388     /**
 389      * @param messageSpyCounter the messageSpyCounter to set
 390      */
 391     public void setMessageSpyCounter(
 392             final MessageSpy<DataContainer> messageSpyCounter) {
 393         this.messageSpyCounter = messageSpyCounter;
 394     }
 395
 396     @Override
 397     public void close() {
 398         LOG.debug("close");
 399         messageSpyCounter = null;
 400         messageTranslators = null;
 401         popListeners = null;
 402         for (SwitchConnectionProvider switchConnectionPrv : switchConnectionProviders) {
 403             switchConnectionPrv.setSwitchConnectionHandler(null);
 404         }
 405         switchConnectionProviders = null;
 406         OFSessionUtil.releaseSessionManager();
 407         errorHandler = null;
 408     }
 409
 410     /**
 411      * @param extensionConverterProvider extension convertor provider
 412      */
 413     public void setExtensionConverterProvider(ExtensionConverterProvider extensionConverterProvider) {
 414         this.extensionConverterProvider = extensionConverterProvider;
 415     }
 416 }