opendaylight/protocol_plugins/openflow/src/main/java/org/opendaylight/controller/protocol_plugin/openflow/internal/InventoryServiceShim.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.controller.protocol_plugin.openflow.internal;
  10
  11 import java.util.ArrayList;
  12 import java.util.Date;
  13 import java.util.HashSet;
  14 import java.util.List;
  15 import java.util.Map;
  16 import java.util.Set;
  17 import java.util.concurrent.ConcurrentHashMap;
  18 import java.util.concurrent.ConcurrentMap;
  19 import java.util.concurrent.CopyOnWriteArrayList;
  20 import java.util.concurrent.CopyOnWriteArraySet;
  21
  22 import org.opendaylight.controller.protocol_plugin.openflow.IInventoryShimExternalListener;
  23 import org.opendaylight.controller.protocol_plugin.openflow.IInventoryShimInternalListener;
  24 import org.opendaylight.controller.protocol_plugin.openflow.IOFStatisticsListener;
  25 import org.opendaylight.controller.protocol_plugin.openflow.core.IController;
  26 import org.opendaylight.controller.protocol_plugin.openflow.core.IMessageListener;
  27 import org.opendaylight.controller.protocol_plugin.openflow.core.ISwitch;
  28 import org.opendaylight.controller.protocol_plugin.openflow.core.ISwitchStateListener;
  29 import org.opendaylight.controller.sal.connection.IPluginOutConnectionService;
  30 import org.opendaylight.controller.sal.core.Actions;
  31 import org.opendaylight.controller.sal.core.Buffers;
  32 import org.opendaylight.controller.sal.core.Capabilities;
  33 import org.opendaylight.controller.sal.core.ContainerFlow;
  34 import org.opendaylight.controller.sal.core.Description;
  35 import org.opendaylight.controller.sal.core.IContainerAware;
  36 import org.opendaylight.controller.sal.core.IContainerListener;
  37 import org.opendaylight.controller.sal.core.MacAddress;
  38 import org.opendaylight.controller.sal.core.Node;
  39 import org.opendaylight.controller.sal.core.NodeConnector;
  40 import org.opendaylight.controller.sal.core.Property;
  41 import org.opendaylight.controller.sal.core.Tables;
  42 import org.opendaylight.controller.sal.core.TimeStamp;
  43 import org.opendaylight.controller.sal.core.UpdateType;
  44 import org.opendaylight.controller.sal.utils.GlobalConstants;
  45 import org.opendaylight.controller.sal.utils.NodeCreator;
  46 import org.openflow.protocol.OFMessage;
  47 import org.openflow.protocol.OFPortStatus;
  48 import org.openflow.protocol.OFPortStatus.OFPortReason;
  49 import org.openflow.protocol.OFType;
  50 import org.openflow.protocol.statistics.OFDescriptionStatistics;
  51 import org.openflow.protocol.statistics.OFStatistics;
  52 import org.slf4j.Logger;
  53 import org.slf4j.LoggerFactory;
  54
  55 /**
  56  * The class describes a shim layer that bridges inventory events from Openflow
  57  * core to various listeners. The notifications are filtered based on container
  58  * configurations.
  59  *
  60  *
  61  */
  62 public class InventoryServiceShim implements IContainerListener,
  63         IMessageListener, ISwitchStateListener, IOFStatisticsListener, IContainerAware {
  64     protected static final Logger logger = LoggerFactory
  65             .getLogger(InventoryServiceShim.class);
  66     private IController controller = null;
  67     private final ConcurrentMap<String, IInventoryShimInternalListener> inventoryShimInternalListeners = new ConcurrentHashMap<String, IInventoryShimInternalListener>();
  68     private final Set<IInventoryShimInternalListener> globalInventoryShimInternalListeners = new HashSet<IInventoryShimInternalListener>();
  69     private final List<IInventoryShimExternalListener> inventoryShimExternalListeners = new CopyOnWriteArrayList<IInventoryShimExternalListener>();
  70     private final ConcurrentMap<NodeConnector, Set<String>> nodeConnectorContainerMap = new ConcurrentHashMap<NodeConnector, Set<String>>();
  71     private final ConcurrentMap<Node, Set<String>> nodeContainerMap = new ConcurrentHashMap<Node, Set<String>>();
  72     private final ConcurrentMap<NodeConnector, Set<Property>> nodeConnectorProps = new ConcurrentHashMap<NodeConnector, Set<Property>>();
  73     private final ConcurrentMap<Node, Set<Property>> nodeProps = new ConcurrentHashMap<Node, Set<Property>>();
  74     private IPluginOutConnectionService connectionOutService;
  75
  76     void setController(IController s) {
  77         this.controller = s;
  78     }
  79
  80     void unsetController(IController s) {
  81         if (this.controller == s) {
  82             this.controller = null;
  83         }
  84     }
  85
  86     void setInventoryShimGlobalInternalListener(Map<?, ?> props,
  87             IInventoryShimInternalListener s) {
  88         if ((this.globalInventoryShimInternalListeners != null)) {
  89             this.globalInventoryShimInternalListeners.add(s);
  90         }
  91     }
  92
  93     void unsetInventoryShimGlobalInternalListener(Map<?, ?> props,
  94             IInventoryShimInternalListener s) {
  95         if ((this.globalInventoryShimInternalListeners != null)) {
  96             this.globalInventoryShimInternalListeners.remove(s);
  97         }
  98     }
  99
 100     void setInventoryShimInternalListener(Map<?, ?> props,
 101             IInventoryShimInternalListener s) {
 102         if (props == null) {
 103             logger.error("setInventoryShimInternalListener property is null");
 104             return;
 105         }
 106         String containerName = (String) props.get("containerName");
 107         if (containerName == null) {
 108             logger.error("setInventoryShimInternalListener containerName not supplied");
 109             return;
 110         }
 111         if ((this.inventoryShimInternalListeners != null)
 112                 && !this.inventoryShimInternalListeners.containsValue(s)) {
 113             this.inventoryShimInternalListeners.put(containerName, s);
 114             logger.trace(
 115                     "Added inventoryShimInternalListener for container {}",
 116                     containerName);
 117         }
 118     }
 119
 120     void unsetInventoryShimInternalListener(Map<?, ?> props,
 121             IInventoryShimInternalListener s) {
 122         if (props == null) {
 123             logger.error("unsetInventoryShimInternalListener property is null");
 124             return;
 125         }
 126         String containerName = (String) props.get("containerName");
 127         if (containerName == null) {
 128             logger.error("setInventoryShimInternalListener containerName not supplied");
 129             return;
 130         }
 131         if ((this.inventoryShimInternalListeners != null)
 132                 && this.inventoryShimInternalListeners.get(containerName) != null
 133                 && this.inventoryShimInternalListeners.get(containerName)
 134                         .equals(s)) {
 135             this.inventoryShimInternalListeners.remove(containerName);
 136             logger.trace(
 137                     "Removed inventoryShimInternalListener for container {}",
 138                     containerName);
 139         }
 140     }
 141
 142     void setInventoryShimExternalListener(IInventoryShimExternalListener s) {
 143         logger.trace("Set inventoryShimExternalListener {}", s);
 144         if ((this.inventoryShimExternalListeners != null)
 145                 && !this.inventoryShimExternalListeners.contains(s)) {
 146             this.inventoryShimExternalListeners.add(s);
 147         }
 148     }
 149
 150     void unsetInventoryShimExternalListener(IInventoryShimExternalListener s) {
 151         logger.trace("Unset inventoryShimExternalListener {}", s);
 152         if ((this.inventoryShimExternalListeners != null)
 153                 && this.inventoryShimExternalListeners.contains(s)) {
 154             this.inventoryShimExternalListeners.remove(s);
 155         }
 156     }
 157
 158     void setIPluginOutConnectionService(IPluginOutConnectionService s) {
 159         connectionOutService = s;
 160     }
 161
 162     void unsetIPluginOutConnectionService(IPluginOutConnectionService s) {
 163         if (connectionOutService == s) {
 164             connectionOutService = null;
 165         }
 166     }
 167
 168     /**
 169      * Function called by the dependency manager when all the required
 170      * dependencies are satisfied
 171      *
 172      */
 173     void init() {
 174         this.controller.addMessageListener(OFType.PORT_STATUS, this);
 175         this.controller.addSwitchStateListener(this);
 176     }
 177
 178     /**
 179      * Function called after registering the service in OSGi service registry.
 180      */
 181     void started() {
 182         /* Start with existing switches */
 183         startService();
 184     }
 185
 186     /**
 187      * Function called by the dependency manager when at least one dependency
 188      * become unsatisfied or when the component is shutting down because for
 189      * example bundle is being stopped.
 190      *
 191      */
 192     void destroy() {
 193         this.controller.removeMessageListener(OFType.PACKET_IN, this);
 194         this.controller.removeSwitchStateListener(this);
 195
 196         this.inventoryShimInternalListeners.clear();
 197         this.nodeConnectorContainerMap.clear();
 198         this.nodeContainerMap.clear();
 199         this.globalInventoryShimInternalListeners.clear();
 200         this.controller = null;
 201     }
 202
 203     @Override
 204     public void receive(ISwitch sw, OFMessage msg) {
 205         if (msg instanceof OFPortStatus) {
 206             handlePortStatusMessage(sw, (OFPortStatus) msg);
 207         }
 208         return;
 209     }
 210
 211     protected void handlePortStatusMessage(ISwitch sw, OFPortStatus m) {
 212         Node node = NodeCreator.createOFNode(sw.getId());
 213         NodeConnector nodeConnector = PortConverter.toNodeConnector(
 214             m.getDesc().getPortNumber(), node);
 215         // get node connector properties
 216         Set<Property> props = InventoryServiceHelper.OFPortToProps(m.getDesc());
 217
 218         UpdateType type = null;
 219         if (m.getReason() == (byte) OFPortReason.OFPPR_ADD.ordinal()) {
 220             type = UpdateType.ADDED;
 221             nodeConnectorProps.put(nodeConnector, props);
 222         } else if (m.getReason() == (byte) OFPortReason.OFPPR_DELETE.ordinal()) {
 223             type = UpdateType.REMOVED;
 224             nodeConnectorProps.remove(nodeConnector);
 225         } else if (m.getReason() == (byte) OFPortReason.OFPPR_MODIFY.ordinal()) {
 226             type = UpdateType.CHANGED;
 227             nodeConnectorProps.put(nodeConnector, props);
 228         }
 229
 230         logger.trace("handlePortStatusMessage {} type {}", nodeConnector, type);
 231
 232         if (type != null) {
 233             notifyInventoryShimListener(nodeConnector, type, props);
 234         }
 235     }
 236
 237     @Override
 238     public void switchAdded(ISwitch sw) {
 239         if (sw == null) {
 240             return;
 241         }
 242         Node node = NodeCreator.createOFNode(sw.getId());
 243         if ((nodeProps.get(node) != null)  && (connectionOutService.isLocal(node))) {
 244             logger.debug("Ignore switchAdded {}", sw);
 245             return;
 246         }
 247
 248         // Add all the nodeConnectors of this switch
 249         Map<NodeConnector, Set<Property>> ncProps = InventoryServiceHelper
 250                 .OFSwitchToProps(sw);
 251         for (Map.Entry<NodeConnector, Set<Property>> entry : ncProps.entrySet()) {
 252             Set<Property> props = new HashSet<Property>();
 253             Set<Property> prop = entry.getValue();
 254             if (prop != null) {
 255                 props.addAll(prop);
 256             }
 257             nodeConnectorProps.put(entry.getKey(), props);
 258             notifyInventoryShimListener(entry.getKey(), UpdateType.ADDED, entry.getValue());
 259         }
 260
 261         // Add this node
 262         addNode(sw);
 263     }
 264
 265     @Override
 266     public void switchDeleted(ISwitch sw) {
 267         if (sw == null) {
 268             return;
 269         }
 270
 271         removeNode(sw);
 272     }
 273
 274     @Override
 275     public void containerModeUpdated(UpdateType t) {
 276         // do nothing
 277     }
 278
 279     @Override
 280     public void tagUpdated(String containerName, Node n, short oldTag,
 281             short newTag, UpdateType t) {
 282         logger.debug("tagUpdated: {} type {} for container {}", new Object[] {
 283                 n, t, containerName });
 284     }
 285
 286     @Override
 287     public void containerFlowUpdated(String containerName,
 288             ContainerFlow previousFlow, ContainerFlow currentFlow, UpdateType t) {
 289     }
 290
 291     @Override
 292     public void nodeConnectorUpdated(String containerName, NodeConnector nc, UpdateType t) {
 293         logger.debug("nodeConnectorUpdated: {} type {} for container {}", new Object[] { nc, t, containerName });
 294         Node node = nc.getNode();
 295         Set<String> ncContainers = this.nodeConnectorContainerMap.get(nc);
 296         Set<String> nodeContainers = this.nodeContainerMap.get(node);
 297         if (ncContainers == null) {
 298             ncContainers = new CopyOnWriteArraySet<String>();
 299         }
 300         if (nodeContainers == null) {
 301             nodeContainers = new CopyOnWriteArraySet<String>();
 302         }
 303         boolean notifyNodeUpdate = false;
 304
 305         switch (t) {
 306         case ADDED:
 307             if (ncContainers.add(containerName)) {
 308                 this.nodeConnectorContainerMap.put(nc, ncContainers);
 309             }
 310             if (nodeContainers.add(containerName)) {
 311                 this.nodeContainerMap.put(node, nodeContainers);
 312                 notifyNodeUpdate = true;
 313             }
 314             break;
 315         case REMOVED:
 316             if (ncContainers.remove(containerName)) {
 317                 if (ncContainers.isEmpty()) {
 318                     // Do cleanup to reduce memory footprint if no
 319                     // elements to be tracked
 320                     this.nodeConnectorContainerMap.remove(nc);
 321                 } else {
 322                     this.nodeConnectorContainerMap.put(nc, ncContainers);
 323                 }
 324             }
 325             boolean nodeContainerUpdate = true;
 326             for (NodeConnector ncContainer : nodeConnectorContainerMap.keySet()) {
 327                 if ((ncContainer.getNode().equals(node)) && (nodeConnectorContainerMap.get(ncContainer).contains(containerName))) {
 328                     nodeContainerUpdate = false;
 329                     break;
 330                 }
 331             }
 332             if (nodeContainerUpdate) {
 333                 nodeContainers.remove(containerName);
 334                 notifyNodeUpdate = true;
 335                 if (nodeContainers.isEmpty()) {
 336                     this.nodeContainerMap.remove(node);
 337                 } else {
 338                     this.nodeContainerMap.put(node, nodeContainers);
 339                 }
 340             }
 341             break;
 342         case CHANGED:
 343             break;
 344         }
 345
 346         Set<Property> nodeProp = nodeProps.get(node);
 347         if (nodeProp == null) {
 348             return;
 349         }
 350         Set<Property> ncProp = nodeConnectorProps.get(nc);
 351         // notify InventoryService
 352         notifyInventoryShimInternalListener(containerName, nc, t, ncProp);
 353
 354         if (notifyNodeUpdate) {
 355             notifyInventoryShimInternalListener(containerName, node, t, nodeProp);
 356         }
 357     }
 358
 359     private void notifyInventoryShimExternalListener(Node node, UpdateType type, Set<Property> props) {
 360         for (IInventoryShimExternalListener s : this.inventoryShimExternalListeners) {
 361             s.updateNode(node, type, props);
 362         }
 363     }
 364
 365     private void notifyInventoryShimExternalListener(NodeConnector nodeConnector, UpdateType type, Set<Property> props) {
 366         for (IInventoryShimExternalListener s : this.inventoryShimExternalListeners) {
 367             s.updateNodeConnector(nodeConnector, type, props);
 368         }
 369     }
 370
 371     private void notifyInventoryShimInternalListener(String container,
 372             NodeConnector nodeConnector, UpdateType type, Set<Property> props) {
 373         IInventoryShimInternalListener inventoryShimInternalListener = inventoryShimInternalListeners.get(container);
 374         if (inventoryShimInternalListener != null) {
 375             inventoryShimInternalListener.updateNodeConnector(nodeConnector, type, props);
 376             logger.trace("notifyInventoryShimInternalListener {} type {} for container {}", new Object[] {
 377                     nodeConnector, type, container });
 378         }
 379     }
 380
 381     /*
 382      * Notify all internal and external listeners
 383      */
 384     private void notifyInventoryShimListener(NodeConnector nodeConnector, UpdateType type, Set<Property> props) {
 385
 386         //establish locality before notifying
 387         boolean isNodeLocal;
 388         if (type == UpdateType.REMOVED){
 389             //if removing get the locality first
 390             isNodeLocal = connectionOutService.isLocal(nodeConnector.getNode());
 391             notifyGlobalInventoryShimInternalListener(nodeConnector, type, props);
 392         } else {
 393             notifyGlobalInventoryShimInternalListener(nodeConnector, type, props);
 394             isNodeLocal = connectionOutService.isLocal(nodeConnector.getNode());
 395         }
 396
 397         if (isNodeLocal) {
 398             // notify other containers
 399             Set<String> containers = (nodeConnectorContainerMap.get(nodeConnector) == null) ? new HashSet<String>()
 400                     : new HashSet<String>(nodeConnectorContainerMap.get(nodeConnector));
 401             containers.add(GlobalConstants.DEFAULT.toString());
 402             for (String container : containers) {
 403                 notifyInventoryShimInternalListener(container, nodeConnector, type, props);
 404             }
 405
 406             // Notify plugin listeners (Discovery, DataPacket, OFstats etc.)
 407             notifyInventoryShimExternalListener(nodeConnector, type, props);
 408
 409             logger.debug("Connection service accepted the inventory notification for {} {}", nodeConnector, type);
 410         } else {
 411             logger.debug("Connection service dropped the inventory notification for {} {}", nodeConnector, type);
 412         }
 413     }
 414
 415     /*
 416      * Notify all internal and external listeners
 417      */
 418     private void notifyInventoryShimListener(Node node, UpdateType type, Set<Property> props) {
 419
 420         //establish locality before notifying
 421         boolean isNodeLocal;
 422         if (type == UpdateType.REMOVED){
 423             //if removing get the locality first
 424             isNodeLocal = connectionOutService.isLocal(node);
 425             notifyGlobalInventoryShimInternalListener(node, type, props);
 426         } else {
 427             notifyGlobalInventoryShimInternalListener(node, type, props);
 428             isNodeLocal = connectionOutService.isLocal(node);
 429         }
 430
 431         if (isNodeLocal) {
 432             // Now notify other containers
 433             Set<String> containers = (nodeContainerMap.get(node) == null) ? new HashSet<String>()
 434                     : new HashSet<String>(nodeContainerMap.get(node));
 435             containers.add(GlobalConstants.DEFAULT.toString());
 436             for (String container : containers) {
 437                 notifyInventoryShimInternalListener(container, node, type, props);
 438             }
 439
 440             // Notify plugin listeners (Discovery, DataPacket, OFstats etc.)
 441             notifyInventoryShimExternalListener(node, type, props);
 442
 443             logger.debug("Connection service accepted the inventory notification for {} {}", node, type);
 444         } else {
 445             logger.debug("Connection service dropped the inventory notification for {} {}", node, type);
 446         }
 447     }
 448
 449     private void notifyGlobalInventoryShimInternalListener(Node node, UpdateType type, Set<Property> props) {
 450         for (IInventoryShimInternalListener globalListener : globalInventoryShimInternalListeners) {
 451             globalListener.updateNode(node, type, props);
 452             logger.trace("notifyGlobalInventoryShimInternalListener {} type {}", new Object[] { node, type });
 453         }
 454     }
 455
 456     private void notifyGlobalInventoryShimInternalListener(NodeConnector nodeConnector, UpdateType type, Set<Property> props) {
 457         for (IInventoryShimInternalListener globalListener : globalInventoryShimInternalListeners) {
 458             globalListener.updateNodeConnector(nodeConnector, type, props);
 459             logger.trace(
 460                     "notifyGlobalInventoryShimInternalListener {} type {}",
 461                     new Object[] { nodeConnector, type });
 462         }
 463     }
 464
 465     private void notifyInventoryShimInternalListener(String container,
 466             Node node, UpdateType type, Set<Property> props) {
 467         IInventoryShimInternalListener inventoryShimInternalListener = inventoryShimInternalListeners
 468                 .get(container);
 469         if (inventoryShimInternalListener != null) {
 470             inventoryShimInternalListener.updateNode(node, type, props);
 471             logger.trace(
 472                     "notifyInventoryShimInternalListener {} type {} for container {}",
 473                     new Object[] { node, type, container });
 474         }
 475     }
 476
 477     private void addNode(ISwitch sw) {
 478         Node node = NodeCreator.createOFNode(sw.getId());
 479         UpdateType type = UpdateType.ADDED;
 480
 481         Set<Property> props = new HashSet<Property>();
 482         Long sid = (Long) node.getID();
 483
 484         Date connectedSince = sw.getConnectedDate();
 485         Long connectedSinceTime = (connectedSince == null) ? 0 : connectedSince
 486                 .getTime();
 487         props.add(new TimeStamp(connectedSinceTime, "connectedSince"));
 488         props.add(new MacAddress(deriveMacAddress(sid)));
 489
 490         byte tables = sw.getTables();
 491         Tables t = new Tables(tables);
 492         if (t != null) {
 493             props.add(t);
 494         }
 495         int cap = sw.getCapabilities();
 496         Capabilities c = new Capabilities(cap);
 497         if (c != null) {
 498             props.add(c);
 499         }
 500         int act = sw.getActions();
 501         Actions a = new Actions(act);
 502         if (a != null) {
 503             props.add(a);
 504         }
 505         int buffers = sw.getBuffers();
 506         Buffers b = new Buffers(buffers);
 507         if (b != null) {
 508             props.add(b);
 509         }
 510
 511         if ((nodeProps.get(node) == null) &&  (connectionOutService.isLocal(node)))  {
 512             // The switch is connected for the first time, flush all flows
 513             // that may exist on this switch
 514             sw.deleteAllFlows();
 515        }
 516         nodeProps.put(node, props);
 517         // Notify all internal and external listeners
 518         notifyInventoryShimListener(node, type, props);
 519     }
 520
 521     private void removeNode(ISwitch sw) {
 522         Node node = NodeCreator.createOFNode(sw.getId());
 523         if(node == null) {
 524             return;
 525         }
 526         removeNodeConnectorProps(node);
 527         nodeProps.remove(node);
 528         UpdateType type = UpdateType.REMOVED;
 529         // Notify all internal and external listeners
 530         notifyInventoryShimListener(node, type, null);
 531     }
 532
 533     private void startService() {
 534         // Get a snapshot of all the existing switches
 535         Map<Long, ISwitch> switches = this.controller.getSwitches();
 536         for (ISwitch sw : switches.values()) {
 537             switchAdded(sw);
 538         }
 539     }
 540
 541     private void removeNodeConnectorProps(Node node) {
 542         List<NodeConnector> ncList = new ArrayList<NodeConnector>();
 543         for (NodeConnector nc : nodeConnectorProps.keySet()) {
 544             if (nc.getNode().equals(node)) {
 545                 ncList.add(nc);
 546             }
 547         }
 548         for (NodeConnector nc : ncList) {
 549             nodeConnectorProps.remove(nc);
 550         }
 551     }
 552
 553     @Override
 554     public void descriptionStatisticsRefreshed(Long switchId, List<OFStatistics> descriptionStats) {
 555         Node node = NodeCreator.createOFNode(switchId);
 556         Set<Property> properties = new HashSet<Property>(1);
 557         OFDescriptionStatistics ofDesc = (OFDescriptionStatistics) descriptionStats.get(0);
 558         Description desc = new Description(ofDesc.getDatapathDescription());
 559         properties.add(desc);
 560
 561         // Notify all internal and external listeners
 562         notifyInventoryShimListener(node, UpdateType.CHANGED, properties);
 563     }
 564
 565     private byte[] deriveMacAddress(long dpid) {
 566         byte[] mac = new byte[] { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
 567
 568         for (short i = 0; i < 6; i++) {
 569             mac[5 - i] = (byte) dpid;
 570             dpid >>= 8;
 571         }
 572
 573         return mac;
 574     }
 575
 576     @Override
 577     public void flowStatisticsRefreshed(Long switchId, List<OFStatistics> flows) {
 578         // Nothing to do
 579     }
 580
 581     @Override
 582     public void portStatisticsRefreshed(Long switchId, List<OFStatistics> ports) {
 583         // Nothing to do
 584     }
 585
 586     @Override
 587     public void tableStatisticsRefreshed(Long switchId, List<OFStatistics> tables) {
 588         // Nothing to do
 589     }
 590
 591     @Override
 592     public void containerCreate(String containerName) {
 593         // Nothing to do
 594     }
 595
 596     @Override
 597     public void containerDestroy(String containerName) {
 598         Set<NodeConnector> removeNodeConnectorSet = new HashSet<NodeConnector>();
 599         Set<Node> removeNodeSet = new HashSet<Node>();
 600         for (Map.Entry<NodeConnector, Set<String>> entry : nodeConnectorContainerMap.entrySet()) {
 601             Set<String> ncContainers = entry.getValue();
 602             if (ncContainers.contains(containerName)) {
 603                 NodeConnector nodeConnector = entry.getKey();
 604                 removeNodeConnectorSet.add(nodeConnector);
 605             }
 606         }
 607         for (Map.Entry<Node, Set<String>> entry : nodeContainerMap.entrySet()) {
 608             Set<String> nodeContainers = entry.getValue();
 609             if (nodeContainers.contains(containerName)) {
 610                 Node node = entry.getKey();
 611                 removeNodeSet.add(node);
 612             }
 613         }
 614         for (NodeConnector nodeConnector : removeNodeConnectorSet) {
 615             Set<String> ncContainers = nodeConnectorContainerMap.get(nodeConnector);
 616             ncContainers.remove(containerName);
 617             if (ncContainers.isEmpty()) {
 618                 nodeConnectorContainerMap.remove(nodeConnector);
 619             }
 620         }
 621         for (Node node : removeNodeSet) {
 622             Set<String> nodeContainers = nodeContainerMap.get(node);
 623             nodeContainers.remove(containerName);
 624             if (nodeContainers.isEmpty()) {
 625                 nodeContainerMap.remove(node);
 626             }
 627         }
 628     }
 629 }