opendaylight/adsal/connectionmanager/implementation/src/main/java/org/opendaylight/controller/connectionmanager/internal/ConnectionManager.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 /**
  10  * Connection Manager provides south-bound connectivity services.
  11  * The APIs are currently focused towards Active-Active Clustering support
  12  * wherein the node can connect to any of the Active Controller in the Cluster.
  13  * This component can also host the necessary logic for south-bound connectivity
  14  * when partial cluster is identified during Partition scenarios.
  15  *
  16  * But this (and its corresponding implementation) component can also be used for
  17  * basic connectivity mechansims for various south-bound plugins.
  18  */
  19
  20 package org.opendaylight.controller.connectionmanager.internal;
  21
  22 import java.net.InetAddress;
  23 import java.net.UnknownHostException;
  24 import java.util.Collections;
  25 import java.util.HashSet;
  26 import java.util.Map;
  27 import java.util.Set;
  28 import java.util.concurrent.BlockingQueue;
  29 import java.util.concurrent.ConcurrentHashMap;
  30 import java.util.concurrent.ConcurrentMap;
  31 import java.util.concurrent.LinkedBlockingQueue;
  32
  33 import org.eclipse.osgi.framework.console.CommandInterpreter;
  34 import org.eclipse.osgi.framework.console.CommandProvider;
  35 import org.opendaylight.controller.clustering.services.ICacheUpdateAware;
  36 import org.opendaylight.controller.clustering.services.IClusterGlobalServices;
  37 import org.opendaylight.controller.clustering.services.ICoordinatorChangeAware;
  38 import org.opendaylight.controller.connectionmanager.ConnectionMgmtScheme;
  39 import org.opendaylight.controller.connectionmanager.IConnectionManager;
  40 import org.opendaylight.controller.connectionmanager.scheme.AbstractScheme;
  41 import org.opendaylight.controller.connectionmanager.scheme.SchemeFactory;
  42 import org.opendaylight.controller.sal.connection.ConnectionConstants;
  43 import org.opendaylight.controller.sal.connection.ConnectionLocality;
  44 import org.opendaylight.controller.sal.connection.IConnectionListener;
  45 import org.opendaylight.controller.sal.connection.IConnectionService;
  46 import org.opendaylight.controller.sal.core.Node;
  47 import org.opendaylight.controller.sal.core.NodeConnector;
  48 import org.opendaylight.controller.sal.core.Property;
  49 import org.opendaylight.controller.sal.core.UpdateType;
  50 import org.opendaylight.controller.sal.inventory.IInventoryService;
  51 import org.opendaylight.controller.sal.inventory.IListenInventoryUpdates;
  52 import org.opendaylight.controller.sal.utils.Status;
  53 import org.opendaylight.controller.sal.utils.StatusCode;
  54 import org.osgi.framework.BundleContext;
  55 import org.osgi.framework.FrameworkUtil;
  56 import org.slf4j.Logger;
  57 import org.slf4j.LoggerFactory;
  58
  59 public class ConnectionManager implements IConnectionManager,
  60         IConnectionListener, ICoordinatorChangeAware, IListenInventoryUpdates,
  61         ICacheUpdateAware<Node, Set<InetAddress>>, CommandProvider {
  62     private static final Logger logger = LoggerFactory
  63             .getLogger(ConnectionManager.class);
  64     private ConnectionMgmtScheme activeScheme = ConnectionMgmtScheme.ANY_CONTROLLER_ONE_MASTER;
  65     private IClusterGlobalServices clusterServices;
  66     private ConcurrentMap<ConnectionMgmtScheme, AbstractScheme> schemes;
  67     private IConnectionService connectionService;
  68     private Thread connectionEventThread;
  69     private BlockingQueue<ConnectionMgmtEvent> connectionEvents;
  70     private IInventoryService inventoryService;
  71
  72     public void setClusterServices(IClusterGlobalServices i) {
  73         this.clusterServices = i;
  74     }
  75
  76     public void unsetClusterServices(IClusterGlobalServices i) {
  77         if (this.clusterServices == i) {
  78             this.clusterServices = null;
  79         }
  80     }
  81
  82     public void setConnectionService(IConnectionService i) {
  83         this.connectionService = i;
  84     }
  85
  86     public void unsetConnectionService(IConnectionService i) {
  87         if (this.connectionService == i) {
  88             this.connectionService = null;
  89         }
  90     }
  91
  92     public void setInventoryService(IInventoryService service) {
  93         logger.trace("Got inventory service set request {}", service);
  94         this.inventoryService = service;
  95     }
  96
  97     public void unsetInventoryService(IInventoryService service) {
  98         logger.trace("Got a service UNset request");
  99         this.inventoryService = null;
 100     }
 101
 102     private void getInventories() {
 103         Map<Node, Map<String, Property>> nodeProp = this.inventoryService
 104                 .getNodeProps();
 105         for (Map.Entry<Node, Map<String, Property>> entry : nodeProp.entrySet()) {
 106             Node node = entry.getKey();
 107             logger.debug("getInventories for node:{}", new Object[] { node });
 108             Map<String, Property> propMap = entry.getValue();
 109             Set<Property> props = new HashSet<Property>();
 110             for (Property property : propMap.values()) {
 111                 props.add(property);
 112             }
 113             updateNode(node, UpdateType.ADDED, props);
 114         }
 115
 116         Map<NodeConnector, Map<String, Property>> nodeConnectorProp = this.inventoryService
 117                 .getNodeConnectorProps();
 118         for (Map.Entry<NodeConnector, Map<String, Property>> entry : nodeConnectorProp
 119                 .entrySet()) {
 120             Map<String, Property> propMap = entry.getValue();
 121             Set<Property> props = new HashSet<Property>();
 122             for (Property property : propMap.values()) {
 123                 props.add(property);
 124             }
 125             updateNodeConnector(entry.getKey(), UpdateType.ADDED, props);
 126         }
 127     }
 128
 129     public void started() {
 130
 131         connectionEventThread.start();
 132
 133         registerWithOSGIConsole();
 134         notifyClusterViewChanged();
 135         // Should pull the Inventory updates in case we missed it
 136         getInventories();
 137     }
 138
 139     public void init() {
 140         connectionEventThread = new Thread(new EventHandler(),
 141                 "ConnectionEvent Thread");
 142         this.connectionEvents = new LinkedBlockingQueue<ConnectionMgmtEvent>();
 143         schemes = new ConcurrentHashMap<ConnectionMgmtScheme, AbstractScheme>();
 144
 145         String schemeStr = System.getProperty("connection.scheme");
 146         for (ConnectionMgmtScheme scheme : ConnectionMgmtScheme.values()) {
 147             AbstractScheme schemeImpl = SchemeFactory.getScheme(scheme, clusterServices);
 148             if (schemeImpl != null) {
 149                 schemes.put(scheme, schemeImpl);
 150                 if (scheme.name().equalsIgnoreCase(schemeStr)) {
 151                     activeScheme = scheme;
 152                 }
 153             }
 154         }
 155     }
 156
 157     public void stopping() {
 158         connectionEventThread.interrupt();
 159         Set<Node> localNodes = getLocalNodes();
 160         if (localNodes != null) {
 161             AbstractScheme scheme = schemes.get(activeScheme);
 162             for (Node localNode : localNodes) {
 163                 connectionService.disconnect(localNode);
 164                 if (scheme != null)
 165                     scheme.removeNode(localNode);
 166             }
 167         }
 168     }
 169
 170     @Override
 171     public ConnectionMgmtScheme getActiveScheme() {
 172         return activeScheme;
 173     }
 174
 175     @Override
 176     public Set<Node> getNodes(InetAddress controller) {
 177         AbstractScheme scheme = schemes.get(activeScheme);
 178         if (scheme == null)
 179             return null;
 180         return scheme.getNodes(controller);
 181     }
 182
 183     @Override
 184     public Set<Node> getLocalNodes() {
 185         AbstractScheme scheme = schemes.get(activeScheme);
 186         if (scheme == null)
 187             return null;
 188         return scheme.getNodes();
 189     }
 190
 191     @Override
 192     public boolean isLocal(Node node) {
 193         AbstractScheme scheme = schemes.get(activeScheme);
 194         if (scheme == null)
 195             return false;
 196         return scheme.isLocal(node);
 197     }
 198
 199     @Override
 200     public ConnectionLocality getLocalityStatus(Node node) {
 201         AbstractScheme scheme = schemes.get(activeScheme);
 202         if (scheme == null)
 203             return ConnectionLocality.NOT_CONNECTED;
 204         return scheme.getLocalityStatus(node);
 205     }
 206
 207     @Override
 208     public void updateNode(Node node, UpdateType type, Set<Property> props) {
 209         logger.debug("updateNode: {} type {} props {}", node, type, props);
 210         AbstractScheme scheme = schemes.get(activeScheme);
 211         if (scheme == null)
 212             return;
 213         switch (type) {
 214         case ADDED:
 215             scheme.addNode(node);
 216             break;
 217         case REMOVED:
 218             scheme.removeNode(node);
 219             break;
 220         default:
 221             break;
 222         }
 223     }
 224
 225     @Override
 226     public void updateNodeConnector(NodeConnector nodeConnector,
 227             UpdateType type, Set<Property> props) {
 228         logger.debug("updateNodeConnector: {} type {} props {}", nodeConnector,
 229                 type, props);
 230         AbstractScheme scheme = schemes.get(activeScheme);
 231         if (scheme == null)
 232             return;
 233         switch (type) {
 234         case ADDED:
 235             scheme.addNode(nodeConnector.getNode());
 236             break;
 237         default:
 238             break;
 239         }
 240     }
 241
 242     @Override
 243     public void coordinatorChanged() {
 244         notifyClusterViewChanged();
 245     }
 246
 247     @Override
 248     public Node connect(String connectionIdentifier,
 249             Map<ConnectionConstants, String> params) {
 250         if (connectionService == null)
 251             return null;
 252         Node node = connectionService.connect(connectionIdentifier, params);
 253         AbstractScheme scheme = schemes.get(activeScheme);
 254         if (scheme != null && node != null)
 255             scheme.addNode(node);
 256         return node;
 257     }
 258
 259     @Override
 260     public Node connect(String type, String connectionIdentifier,
 261             Map<ConnectionConstants, String> params) {
 262         if (connectionService == null)
 263             return null;
 264         Node node = connectionService.connect(type, connectionIdentifier, params);
 265         AbstractScheme scheme = schemes.get(activeScheme);
 266         if (scheme != null && node != null)
 267             scheme.addNode(node);
 268         return node;
 269     }
 270
 271     @Override
 272     public Status disconnect(Node node) {
 273         if (node == null)
 274             return new Status(StatusCode.BADREQUEST);
 275         if (connectionService == null)
 276             return new Status(StatusCode.NOSERVICE);
 277         Status status = connectionService.disconnect(node);
 278         if (status.isSuccess()) {
 279             AbstractScheme scheme = schemes.get(activeScheme);
 280             if (scheme != null)
 281                 scheme.removeNode(node);
 282         }
 283         return status;
 284     }
 285
 286     @Override
 287     public void entryCreated(Node key, String cacheName, boolean originLocal) {
 288         if (originLocal)
 289             return;
 290     }
 291
 292     /*
 293      * Clustering Services doesn't provide the existing states in the cache
 294      * update callbacks. Hence, using a scratch local cache to maintain the
 295      * existing state.
 296      */
 297     private ConcurrentMap<Node, Set<InetAddress>> existingConnections = new ConcurrentHashMap<Node, Set<InetAddress>>();
 298
 299     @Override
 300     public void entryUpdated(Node node, Set<InetAddress> newControllers,
 301             String cacheName, boolean originLocal) {
 302         if (originLocal)
 303             return;
 304         Set<InetAddress> existingControllers = existingConnections.get(node);
 305         if (existingControllers != null) {
 306             logger.debug("Processing Update for : {} NewControllers : {} existingControllers : {}", node,
 307                     newControllers.toString(), existingControllers.toString());
 308             if (newControllers.size() < existingControllers.size()) {
 309                 Set<InetAddress> removed = new HashSet<InetAddress>(existingControllers);
 310                 if (removed.removeAll(newControllers)) {
 311                     logger.debug("notifyNodeDisconnectFromMaster({})", node);
 312                     notifyNodeDisconnectedEvent(node);
 313                 }
 314             }
 315         } else {
 316             logger.debug("Ignoring the Update for : {} NewControllers : {}", node, newControllers.toString());
 317         }
 318         existingConnections.put(node, newControllers);
 319     }
 320
 321     @Override
 322     public void entryDeleted(Node key, String cacheName, boolean originLocal) {
 323         if (originLocal)
 324             return;
 325         logger.debug("Deleted entry {} from cache : {}", key, cacheName);
 326         notifyNodeDisconnectedEvent(key);
 327     }
 328
 329     private void enqueueConnectionEvent(ConnectionMgmtEvent event) {
 330         try {
 331             if (!connectionEvents.contains(event)) {
 332                 this.connectionEvents.put(event);
 333             }
 334         } catch (InterruptedException e) {
 335             logger.debug(
 336                     "enqueueConnectionEvent caught Interrupt Exception for event {}",
 337                     event);
 338         }
 339     }
 340
 341     private void notifyClusterViewChanged() {
 342         ConnectionMgmtEvent event = new ConnectionMgmtEvent(
 343                 ConnectionMgmtEventType.CLUSTER_VIEW_CHANGED, null);
 344         enqueueConnectionEvent(event);
 345     }
 346
 347     private void notifyNodeDisconnectedEvent(Node node) {
 348         ConnectionMgmtEvent event = new ConnectionMgmtEvent(
 349                 ConnectionMgmtEventType.NODE_DISCONNECTED_FROM_MASTER, node);
 350         enqueueConnectionEvent(event);
 351     }
 352
 353     /*
 354      * this thread monitors the connectionEvent queue for new incoming events
 355      * from
 356      */
 357     private class EventHandler implements Runnable {
 358         @Override
 359         public void run() {
 360
 361             while (true) {
 362                 try {
 363                     ConnectionMgmtEvent ev = connectionEvents.take();
 364                     ConnectionMgmtEventType eType = ev.getEvent();
 365                     switch (eType) {
 366                     case NODE_DISCONNECTED_FROM_MASTER:
 367                         Node node = (Node) ev.getData();
 368                         connectionService.notifyNodeDisconnectFromMaster(node);
 369                         break;
 370                     case CLUSTER_VIEW_CHANGED:
 371                         AbstractScheme scheme = schemes.get(activeScheme);
 372                         if (scheme == null)
 373                             return;
 374                         scheme.handleClusterViewChanged();
 375                         connectionService.notifyClusterViewChanged();
 376                         break;
 377                     default:
 378                         logger.error("Unknown Connection event {}",
 379                                 eType.ordinal());
 380                     }
 381                 } catch (InterruptedException e) {
 382                     connectionEvents.clear();
 383                     return;
 384                 }
 385             }
 386         }
 387     }
 388
 389     private void registerWithOSGIConsole() {
 390         BundleContext bundleContext = FrameworkUtil.getBundle(this.getClass())
 391                 .getBundleContext();
 392         bundleContext.registerService(CommandProvider.class.getName(), this,
 393                 null);
 394     }
 395
 396     public void _scheme(CommandInterpreter ci) {
 397         String schemeStr = ci.nextArgument();
 398         if (schemeStr == null) {
 399             ci.println("Please enter valid Scheme name");
 400             ci.println("Current Scheme : " + activeScheme.name());
 401             return;
 402         }
 403         ConnectionMgmtScheme scheme = ConnectionMgmtScheme.valueOf(schemeStr);
 404         if (scheme == null) {
 405             ci.println("Please enter a valid Scheme name");
 406             return;
 407         }
 408         activeScheme = scheme;
 409     }
 410
 411     public void _printNodes(CommandInterpreter ci) {
 412         String controller = ci.nextArgument();
 413         if (controller == null) {
 414             ci.println("Nodes connected to this controller : ");
 415             if (this.getLocalNodes() == null) {
 416                 ci.println("None");
 417             } else {
 418                 ci.println(this.getLocalNodes().toString());
 419             }
 420             return;
 421         }
 422         try {
 423             InetAddress address = InetAddress.getByName(controller);
 424             ci.println("Nodes connected to controller " + controller);
 425             if (this.getNodes(address) == null) {
 426                 ci.println("None");
 427             } else {
 428                 ci.println(this.getNodes(address).toString());
 429             }
 430         } catch (UnknownHostException e) {
 431             logger.error("An error occured", e);
 432         }
 433     }
 434
 435     @Override
 436     public String getHelp() {
 437         StringBuffer help = new StringBuffer();
 438         help.append("---Connection Manager---\n");
 439         help.append("\t scheme [<name>]                      - Print / Set scheme\n");
 440         help.append("\t printNodes [<controller>]            - Print connected nodes\n");
 441         return help.toString();
 442     }
 443
 444     @Override
 445     public Set<InetAddress> getControllers(Node node) {
 446         AbstractScheme scheme = schemes.get(activeScheme);
 447         if (scheme == null)
 448             return Collections.emptySet();
 449         return scheme.getControllers(node);
 450     }
 451 }