opendaylight/connectionmanager/implementation/src/main/java/org/opendaylight/controller/connectionmanager/internal/ConnectionManager.java

   1
   2 /*
   3  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   4  *
   5  * This program and the accompanying materials are made available under the
   6  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   7  * and is available at http://www.eclipse.org/legal/epl-v10.html
   8  */
   9
  10 /**
  11  * Connection Manager provides south-bound connectivity services.
  12  * The APIs are currently focused towards Active-Active Clustering support
  13  * wherein the node can connect to any of the Active Controller in the Cluster.
  14  * This component can also host the necessary logic for south-bound connectivity
  15  * when partial cluster is identified during Partition scenarios.
  16  *
  17  * But this (and its corresponding implementation) component can also be used for
  18  * basic connectivity mechansims for various south-bound plugins.
  19  */
  20
  21 package org.opendaylight.controller.connectionmanager.internal;
  22
  23 import java.net.InetAddress;
  24 import java.net.UnknownHostException;
  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.slf4j.Logger;
  34 import org.slf4j.LoggerFactory;
  35
  36 import org.eclipse.osgi.framework.console.CommandInterpreter;
  37 import org.eclipse.osgi.framework.console.CommandProvider;
  38 import org.opendaylight.controller.clustering.services.ICacheUpdateAware;
  39 import org.opendaylight.controller.clustering.services.IClusterGlobalServices;
  40 import org.opendaylight.controller.clustering.services.ICoordinatorChangeAware;
  41 import org.opendaylight.controller.connectionmanager.ConnectionMgmtScheme;
  42 import org.opendaylight.controller.connectionmanager.IConnectionManager;
  43 import org.opendaylight.controller.connectionmanager.scheme.AbstractScheme;
  44 import org.opendaylight.controller.connectionmanager.scheme.SchemeFactory;
  45 import org.opendaylight.controller.sal.connection.ConnectionConstants;
  46 import org.opendaylight.controller.sal.connection.IConnectionListener;
  47 import org.opendaylight.controller.sal.connection.IConnectionService;
  48 import org.opendaylight.controller.sal.core.Node;
  49 import org.opendaylight.controller.sal.core.NodeConnector;
  50 import org.opendaylight.controller.sal.core.Property;
  51 import org.opendaylight.controller.sal.core.UpdateType;
  52 import org.opendaylight.controller.sal.inventory.IListenInventoryUpdates;
  53 import org.opendaylight.controller.sal.utils.Status;
  54 import org.opendaylight.controller.sal.utils.StatusCode;
  55 import org.osgi.framework.BundleContext;
  56 import org.osgi.framework.FrameworkUtil;
  57
  58 public class ConnectionManager implements IConnectionManager, IConnectionListener,
  59                                           ICoordinatorChangeAware, IListenInventoryUpdates,
  60                                           ICacheUpdateAware<Node, Set<InetAddress>>,
  61                                           CommandProvider {
  62     private static final Logger logger = LoggerFactory.getLogger(ConnectionManager.class);
  63     private ConnectionMgmtScheme activeScheme = ConnectionMgmtScheme.ANY_CONTROLLER_ONE_MASTER;
  64     private IClusterGlobalServices clusterServices;
  65     private ConcurrentMap<ConnectionMgmtScheme, AbstractScheme> schemes;
  66     private IConnectionService connectionService;
  67     private Thread connectionEventThread;
  68     private BlockingQueue<ConnectionMgmtEvent> connectionEvents;
  69
  70     public void setClusterServices(IClusterGlobalServices i) {
  71         this.clusterServices = i;
  72     }
  73
  74     public void unsetClusterServices(IClusterGlobalServices i) {
  75         if (this.clusterServices == i) {
  76             this.clusterServices = null;
  77         }
  78     }
  79
  80     public void setConnectionService(IConnectionService i) {
  81         this.connectionService = i;
  82     }
  83
  84     public void unsetConnectionService(IConnectionService i) {
  85         if (this.connectionService == i) {
  86             this.connectionService = null;
  87         }
  88     }
  89
  90     public void started() {
  91         connectionEventThread = new Thread(new EventHandler(), "ConnectionEvent Thread");
  92         connectionEventThread.start();
  93
  94         registerWithOSGIConsole();
  95         notifyClusterViewChanged();
  96     }
  97
  98     public void init() {
  99         this.connectionEvents = new LinkedBlockingQueue<ConnectionMgmtEvent>();
 100         schemes = new ConcurrentHashMap<ConnectionMgmtScheme, AbstractScheme>();
 101         for (ConnectionMgmtScheme scheme : ConnectionMgmtScheme.values()) {
 102             AbstractScheme schemeImpl = SchemeFactory.getScheme(scheme, clusterServices);
 103             if (schemeImpl != null) schemes.put(scheme, schemeImpl);
 104         }
 105     }
 106
 107     public void stop() {
 108         connectionEventThread.interrupt();
 109         Set<Node> localNodes = getLocalNodes();
 110         if (localNodes != null) {
 111             AbstractScheme scheme = schemes.get(activeScheme);
 112             for (Node localNode : localNodes) {
 113                 connectionService.disconnect(localNode);
 114                 if (scheme != null) scheme.removeNode(localNode);
 115             }
 116         }
 117     }
 118
 119     @Override
 120     public ConnectionMgmtScheme getActiveScheme() {
 121         return activeScheme;
 122     }
 123
 124     @Override
 125     public Set<Node> getNodes(InetAddress controller) {
 126         AbstractScheme scheme = schemes.get(activeScheme);
 127         if (scheme == null) return null;
 128         return scheme.getNodes(controller);
 129     }
 130
 131     @Override
 132     public Set<Node> getLocalNodes() {
 133         AbstractScheme scheme = schemes.get(activeScheme);
 134         if (scheme == null) return null;
 135         return scheme.getNodes();
 136     }
 137
 138     @Override
 139     public boolean isLocal(Node node) {
 140         AbstractScheme scheme = schemes.get(activeScheme);
 141         if (scheme == null) return false;
 142         return scheme.isLocal(node);
 143     }
 144
 145     @Override
 146     public void updateNode(Node node, UpdateType type, Set<Property> props) {
 147         logger.debug("updateNode: {} type {} props {}", node, type, props);
 148         AbstractScheme scheme = schemes.get(activeScheme);
 149         if (scheme == null) return;
 150         switch (type) {
 151         case ADDED:
 152             scheme.addNode(node);
 153             break;
 154         case REMOVED:
 155             scheme.removeNode(node);
 156             break;
 157         default:
 158                 break;
 159         }
 160     }
 161
 162     @Override
 163     public void updateNodeConnector(NodeConnector nodeConnector,
 164             UpdateType type, Set<Property> props) {
 165         logger.debug("updateNodeConnector: {} type {} props {}", nodeConnector, type, props);
 166         AbstractScheme scheme = schemes.get(activeScheme);
 167         if (scheme == null) return;
 168         switch (type) {
 169         case ADDED:
 170             scheme.addNode(nodeConnector.getNode());
 171             break;
 172         default:
 173                 break;
 174         }
 175     }
 176
 177     @Override
 178     public void coordinatorChanged() {
 179         notifyClusterViewChanged();
 180     }
 181
 182     @Override
 183     public Node connect(String connectionIdentifier, Map<ConnectionConstants, String> params) {
 184         if (connectionService == null) return null;
 185         return connectionService.connect(connectionIdentifier, params);
 186     }
 187
 188     @Override
 189     public Node connect(String type, String connectionIdentifier, Map<ConnectionConstants, String> params) {
 190         if (connectionService == null) return null;
 191         return connectionService.connect(type, connectionIdentifier, params);
 192     }
 193
 194     @Override
 195     public Status disconnect (Node node) {
 196         if (connectionService == null) return new Status(StatusCode.NOSERVICE);
 197         return connectionService.disconnect(node);
 198     }
 199
 200     @Override
 201     public void entryCreated(Node key, String cacheName, boolean originLocal) {
 202         if (originLocal) return;
 203     }
 204
 205     /*
 206      * Clustering Services' doesnt provide the existing states in the cache update callbacks.
 207      * Hence, using a scratch local cache to maintain the existing state.
 208      *
 209      */
 210     private ConcurrentMap<Node, Set<InetAddress>> existingConnections = new ConcurrentHashMap<Node, Set<InetAddress>>();
 211
 212     @Override
 213     public void entryUpdated(Node node, Set<InetAddress> newControllers, String cacheName, boolean originLocal) {
 214         if (originLocal) return;
 215         Set<InetAddress> existingControllers = existingConnections.get(node);
 216         if (existingControllers != null) {
 217             logger.debug("Processing Update for : {} NewControllers : {} existingControllers : {}", node,
 218                     newControllers.toString(), existingControllers.toString());
 219             if (newControllers.size() < existingControllers.size()) {
 220                 Set<InetAddress> removed = new HashSet<InetAddress>(existingControllers);
 221                 if (removed.removeAll(newControllers)) {
 222                     logger.debug("notifyNodeDisconnectFromMaster({})", node);
 223                     notifyNodeDisconnectedEvent(node);
 224                 }
 225             }
 226         } else {
 227             logger.debug("Ignoring the Update for : {} NewControllers : {}", node, newControllers.toString());
 228         }
 229         existingConnections.put(node, newControllers);
 230     }
 231
 232     @Override
 233     public void entryDeleted(Node key, String cacheName, boolean originLocal) {
 234         if (originLocal) return;
 235         logger.debug("Deleted : {} cache : {}", key, cacheName);
 236         notifyNodeDisconnectedEvent(key);
 237     }
 238
 239     private void enqueueConnectionEvent(ConnectionMgmtEvent event) {
 240         try {
 241             if (!connectionEvents.contains(event)) {
 242                 this.connectionEvents.put(event);
 243             }
 244         } catch (InterruptedException e) {
 245             logger.debug("enqueueConnectionEvent caught Interrupt Exception for event {}", event);
 246         }
 247     }
 248
 249     private void notifyClusterViewChanged() {
 250         ConnectionMgmtEvent event = new ConnectionMgmtEvent(ConnectionMgmtEventType.CLUSTER_VIEW_CHANGED, null);
 251         enqueueConnectionEvent(event);
 252     }
 253
 254     private void notifyNodeDisconnectedEvent(Node node) {
 255         ConnectionMgmtEvent event = new ConnectionMgmtEvent(ConnectionMgmtEventType.NODE_DISCONNECTED_FROM_MASTER, node);
 256         enqueueConnectionEvent(event);
 257     }
 258
 259     /*
 260      * this thread monitors the connectionEvent queue for new incoming events from
 261      */
 262     private class EventHandler implements Runnable {
 263         @Override
 264         public void run() {
 265
 266             while (true) {
 267                 try {
 268                     ConnectionMgmtEvent ev = connectionEvents.take();
 269                     ConnectionMgmtEventType eType = ev.getEvent();
 270                     switch (eType) {
 271                     case NODE_DISCONNECTED_FROM_MASTER:
 272                         Node node = (Node)ev.getData();
 273                         connectionService.notifyNodeDisconnectFromMaster(node);
 274                         break;
 275                     case CLUSTER_VIEW_CHANGED:
 276                         AbstractScheme scheme = schemes.get(activeScheme);
 277                         if (scheme == null) return;
 278                         scheme.handleClusterViewChanged();
 279                         connectionService.notifyClusterViewChanged();
 280                         break;
 281                     default:
 282                         logger.error("Unknown Connection event {}", eType.ordinal());
 283                     }
 284                 } catch (InterruptedException e) {
 285                     connectionEvents.clear();
 286                     return;
 287                 }
 288             }
 289         }
 290     }
 291
 292     private void registerWithOSGIConsole() {
 293         BundleContext bundleContext = FrameworkUtil.getBundle(this.getClass())
 294                 .getBundleContext();
 295         bundleContext.registerService(CommandProvider.class.getName(), this,
 296                 null);
 297     }
 298
 299     public void _scheme (CommandInterpreter ci) {
 300         String schemeStr = ci.nextArgument();
 301         if (schemeStr == null) {
 302             ci.println("Please enter valid Scheme name");
 303             ci.println("Current Scheme : " + activeScheme.name());
 304             return;
 305         }
 306         ConnectionMgmtScheme scheme = ConnectionMgmtScheme.valueOf(schemeStr);
 307         if (scheme == null) {
 308             ci.println("Please enter a valid Scheme name");
 309             return;
 310         }
 311         activeScheme = scheme;
 312     }
 313
 314     public void _printNodes (CommandInterpreter ci) {
 315         String controller = ci.nextArgument();
 316         if (controller == null) {
 317             ci.println("Nodes connected to this controller : ");
 318             if (this.getLocalNodes() == null) ci.println("None");
 319             else ci.println(this.getLocalNodes().toString());
 320             return;
 321         }
 322         try {
 323             InetAddress address = InetAddress.getByName(controller);
 324             ci.println("Nodes connected to controller "+controller);
 325             if (this.getNodes(address) == null) ci.println("None");
 326             else ci.println(this.getNodes(address).toString());
 327             return;
 328         } catch (UnknownHostException e) {
 329             e.printStackTrace();
 330         }
 331     }
 332
 333     @Override
 334     public String getHelp() {
 335         StringBuffer help = new StringBuffer();
 336         help.append("---Connection Manager---\n");
 337         help.append("\t scheme [<name>]                      - Print / Set scheme\n");
 338         help.append("\t printNodes [<controller>]            - Print connected nodes\n");
 339         return help.toString();
 340     }
 341 }