netconf/messagebus-netconf/src/main/java/org/opendaylight/netconf/messagebus/eventsources/netconf/NetconfEventSource.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.netconf.messagebus.eventsources.netconf;
  10
  11 import static com.google.common.util.concurrent.Futures.immediateFuture;
  12
  13 import com.google.common.base.Optional;
  14 import com.google.common.base.Preconditions;
  15 import com.google.common.collect.ArrayListMultimap;
  16 import com.google.common.collect.Maps;
  17 import com.google.common.collect.Multimap;
  18 import com.google.common.collect.Multimaps;
  19 import java.io.IOException;
  20 import java.util.ArrayList;
  21 import java.util.Collection;
  22 import java.util.Date;
  23 import java.util.HashMap;
  24 import java.util.List;
  25 import java.util.Map;
  26 import java.util.Map.Entry;
  27 import java.util.Set;
  28 import java.util.concurrent.Future;
  29 import java.util.regex.Pattern;
  30 import javax.xml.stream.XMLStreamException;
  31 import javax.xml.transform.dom.DOMResult;
  32 import javax.xml.transform.dom.DOMSource;
  33 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  34 import org.opendaylight.controller.md.sal.dom.api.DOMEvent;
  35 import org.opendaylight.controller.md.sal.dom.api.DOMNotification;
  36 import org.opendaylight.controller.md.sal.dom.api.DOMNotificationListener;
  37 import org.opendaylight.controller.md.sal.dom.api.DOMNotificationPublishService;
  38 import org.opendaylight.controller.messagebus.app.util.TopicDOMNotification;
  39 import org.opendaylight.controller.messagebus.app.util.Util;
  40 import org.opendaylight.controller.messagebus.spi.EventSource;
  41 import org.opendaylight.netconf.api.xml.XmlUtil;
  42 import org.opendaylight.netconf.util.NetconfUtil;
  43 import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.messagebus.eventaggregator.rev141202.NotificationPattern;
  44 import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.messagebus.eventaggregator.rev141202.TopicId;
  45 import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.messagebus.eventaggregator.rev141202.TopicNotification;
  46 import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.messagebus.eventsource.rev141202.DisJoinTopicInput;
  47 import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.messagebus.eventsource.rev141202.JoinTopicInput;
  48 import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.messagebus.eventsource.rev141202.JoinTopicOutput;
  49 import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.messagebus.eventsource.rev141202.JoinTopicOutputBuilder;
  50 import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.messagebus.eventsource.rev141202.JoinTopicStatus;
  51 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netmod.notification.rev080714.netconf.streams.Stream;
  52 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
  53 import org.opendaylight.yangtools.yang.common.QName;
  54 import org.opendaylight.yangtools.yang.common.RpcResult;
  55 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
  56 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  57 import org.opendaylight.yangtools.yang.data.api.schema.AnyXmlNode;
  58 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  59 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
  60 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
  61 import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
  62 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  63 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  64 import org.slf4j.Logger;
  65 import org.slf4j.LoggerFactory;
  66 import org.w3c.dom.Document;
  67 import org.w3c.dom.Element;
  68
  69 /**
  70  * NetconfEventSource serves as proxy between nodes and messagebus. Subscribers can join topic stream from this source.
  71  * Then they will receive notifications from device that matches pattern specified by topic.
  72  */
  73 public class NetconfEventSource implements EventSource, DOMNotificationListener {
  74
  75     private static final Logger LOG = LoggerFactory.getLogger(NetconfEventSource.class);
  76
  77     private static final NodeIdentifier TOPIC_NOTIFICATION_ARG = NodeIdentifier.create(TopicNotification.QNAME);
  78     private static final NodeIdentifier EVENT_SOURCE_ARG = NodeIdentifier.create(
  79             QName.create(TopicNotification.QNAME, "node-id"));
  80     private static final NodeIdentifier TOPIC_ID_ARG = NodeIdentifier.create(
  81             QName.create(TopicNotification.QNAME, "topic-id"));
  82     private static final NodeIdentifier PAYLOAD_ARG = NodeIdentifier.create(
  83             QName.create(TopicNotification.QNAME, "payload"));
  84     private static final String CONNECTION_NOTIFICATION_SOURCE_NAME = "ConnectionNotificationSource";
  85
  86     private final DOMNotificationPublishService domPublish;
  87
  88     private final Map<String, String> urnPrefixToStreamMap; // key = urnPrefix, value = StreamName
  89
  90     /**
  91      * Map notification uri -> registrations.
  92      */
  93     private final Multimap<String, NotificationTopicRegistration>
  94             notificationTopicRegistrations = Multimaps.synchronizedListMultimap(ArrayListMultimap.create());
  95     private final NetconfEventSourceMount mount;
  96
  97     /**
  98      * Creates new NetconfEventSource for node. Topic notifications will be published via provided
  99      * {@link DOMNotificationPublishService}
 100      *
 101      * @param streamMap      netconf streams from device
 102      * @param publishService publish service
 103      */
 104     public NetconfEventSource(final Map<String, String> streamMap,
 105                               final NetconfEventSourceMount mount,
 106                               final DOMNotificationPublishService publishService) {
 107         this.mount = mount;
 108         this.urnPrefixToStreamMap = Preconditions.checkNotNull(streamMap);
 109         this.domPublish = Preconditions.checkNotNull(publishService);
 110         this.initializeNotificationTopicRegistrationList();
 111
 112         LOG.info("NetconfEventSource [{}] created.", mount.getNodeId());
 113     }
 114
 115     /**
 116      * Creates {@link ConnectionNotificationTopicRegistration} for connection. Also creates
 117      * {@link StreamNotificationTopicRegistration} for every prefix and available stream as defined in config file.
 118      */
 119     private void initializeNotificationTopicRegistrationList() {
 120         final ConnectionNotificationTopicRegistration cntr =
 121                 new ConnectionNotificationTopicRegistration(CONNECTION_NOTIFICATION_SOURCE_NAME, this);
 122         notificationTopicRegistrations
 123                 .put(cntr.getNotificationUrnPrefix(), cntr);
 124         Map<String, Stream> availableStreams = getAvailableStreams();
 125         LOG.debug("Stream configuration compare...");
 126         for (Entry<String, String> entry : this.urnPrefixToStreamMap.entrySet()) {
 127             String urnPrefix = entry.getKey();
 128             final String streamName = entry.getValue();
 129             LOG.debug("urnPrefix: {} streamName: {}", urnPrefix, streamName);
 130             if (availableStreams.containsKey(streamName)) {
 131                 LOG.debug("Stream containig on device");
 132                 notificationTopicRegistrations
 133                         .put(urnPrefix, new StreamNotificationTopicRegistration(availableStreams.get(streamName),
 134                                 urnPrefix, this));
 135             }
 136         }
 137     }
 138
 139     private Map<String, Stream> getAvailableStreams() {
 140         Map<String, Stream> streamMap = new HashMap<>();
 141         final List<Stream> availableStreams;
 142         try {
 143             availableStreams = mount.getAvailableStreams();
 144             streamMap = Maps.uniqueIndex(availableStreams, input -> input.getName().getValue());
 145         } catch (ReadFailedException e) {
 146             LOG.warn("Can not read streams for node {}", mount.getNodeId());
 147         }
 148         return streamMap;
 149     }
 150
 151     @Override
 152     public Future<RpcResult<JoinTopicOutput>> joinTopic(final JoinTopicInput input) {
 153         LOG.debug("Join topic {} on {}", input.getTopicId().getValue(), mount.getNodeId());
 154         final NotificationPattern notificationPattern = input.getNotificationPattern();
 155         final List<SchemaPath> matchingNotifications = getMatchingNotifications(notificationPattern);
 156         return registerTopic(input.getTopicId(), matchingNotifications);
 157
 158     }
 159
 160     @Override
 161     public Future<RpcResult<Void>> disJoinTopic(final DisJoinTopicInput input) {
 162         for (NotificationTopicRegistration reg : notificationTopicRegistrations.values()) {
 163             reg.unRegisterNotificationTopic(input.getTopicId());
 164         }
 165         return Util.resultRpcSuccessFor((Void) null);
 166     }
 167
 168     private synchronized Future<RpcResult<JoinTopicOutput>> registerTopic(
 169             final TopicId topicId,
 170             final List<SchemaPath> notificationsToSubscribe) {
 171         Preconditions.checkNotNull(notificationsToSubscribe);
 172         LOG.debug("Join topic {} - register", topicId);
 173         JoinTopicStatus joinTopicStatus = JoinTopicStatus.Down;
 174
 175         LOG.debug("Notifications to subscribe has found - count {}", notificationsToSubscribe.size());
 176         int registeredNotificationCount = 0;
 177         for (SchemaPath schemaPath : notificationsToSubscribe) {
 178             final Collection<NotificationTopicRegistration> topicRegistrations =
 179                     notificationTopicRegistrations.get(schemaPath.getLastComponent().getNamespace().toString());
 180             for (NotificationTopicRegistration reg : topicRegistrations) {
 181                 LOG.info("Source of notification {} is activating, TopicId {}", reg.getSourceName(),
 182                         topicId.getValue());
 183                 boolean regSuccess = reg.registerNotificationTopic(schemaPath, topicId);
 184                 if (regSuccess) {
 185                     registeredNotificationCount = registeredNotificationCount + 1;
 186                 }
 187             }
 188         }
 189         if (registeredNotificationCount > 0) {
 190             joinTopicStatus = JoinTopicStatus.Up;
 191         }
 192         final JoinTopicOutput output = new JoinTopicOutputBuilder().setStatus(joinTopicStatus).build();
 193         return immediateFuture(RpcResultBuilder.success(output).build());
 194
 195     }
 196
 197     public void reActivateStreams() {
 198         for (NotificationTopicRegistration reg : notificationTopicRegistrations.values()) {
 199             LOG.info("Source of notification {} is reactivating on node {}", reg.getSourceName(), mount.getNodeId());
 200             reg.reActivateNotificationSource();
 201         }
 202     }
 203
 204     public void deActivateStreams() {
 205         for (NotificationTopicRegistration reg : notificationTopicRegistrations.values()) {
 206             LOG.info("Source of notification {} is deactivating on node {}", reg.getSourceName(), mount.getNodeId());
 207             reg.deActivateNotificationSource();
 208         }
 209     }
 210
 211     @Override
 212     public void onNotification(final DOMNotification notification) {
 213         SchemaPath notificationPath = notification.getType();
 214         Date notificationEventTime = null;
 215         if (notification instanceof DOMEvent) {
 216             notificationEventTime = ((DOMEvent) notification).getEventTime();
 217         }
 218         final String namespace = notification.getType().getLastComponent().getNamespace().toString();
 219         for (NotificationTopicRegistration notifReg : notificationTopicRegistrations.get(namespace)) {
 220             notifReg.setLastEventTime(notificationEventTime);
 221             Set<TopicId> topicIdsForNotification = notifReg.getTopicsForNotification(notificationPath);
 222             for (TopicId topicId : topicIdsForNotification) {
 223                 publishNotification(notification, topicId);
 224                 LOG.debug("Notification {} has been published for TopicId {}", notification.getType(),
 225                         topicId.getValue());
 226             }
 227         }
 228     }
 229
 230     private void publishNotification(final DOMNotification notification, final TopicId topicId) {
 231         final ContainerNode topicNotification = Builders.containerBuilder().withNodeIdentifier(TOPIC_NOTIFICATION_ARG)
 232                 .withChild(ImmutableNodes.leafNode(TOPIC_ID_ARG, topicId))
 233                 .withChild(ImmutableNodes.leafNode(EVENT_SOURCE_ARG, mount.getNodeId()))
 234                 .withChild(encapsulate(notification))
 235                 .build();
 236         try {
 237             domPublish.putNotification(new TopicDOMNotification(topicNotification));
 238         } catch (final InterruptedException e) {
 239             throw new RuntimeException(e);
 240         }
 241     }
 242
 243     private AnyXmlNode encapsulate(final DOMNotification body) {
 244         // FIXME: Introduce something like YangModeledAnyXmlNode in Yangtools
 245         final Document doc = XmlUtil.newDocument();
 246         final Optional<String> namespace = Optional.of(PAYLOAD_ARG.getNodeType().getNamespace().toString());
 247         final Element element = XmlUtil.createElement(doc, "payload", namespace);
 248
 249         final DOMResult result = new DOMResult(element);
 250
 251         final SchemaContext context = mount.getSchemaContext();
 252         final SchemaPath schemaPath = body.getType();
 253         try {
 254             NetconfUtil.writeNormalizedNode(body.getBody(), result, schemaPath, context);
 255             return Builders.anyXmlBuilder().withNodeIdentifier(PAYLOAD_ARG).withValue(new DOMSource(element)).build();
 256         } catch (IOException | XMLStreamException e) {
 257             LOG.error("Unable to encapsulate notification.", e);
 258             throw new RuntimeException(e);
 259         }
 260     }
 261
 262     /**
 263      * Returns all available notification paths that matches given pattern.
 264      *
 265      * @param notificationPattern pattern
 266      * @return notification paths
 267      */
 268     private List<SchemaPath> getMatchingNotifications(final NotificationPattern notificationPattern) {
 269         final String regex = notificationPattern.getValue();
 270
 271         final Pattern pattern = Pattern.compile(regex);
 272         List<SchemaPath> availableNotifications = getAvailableNotifications();
 273         return Util.expandQname(availableNotifications, pattern);
 274     }
 275
 276     @Override
 277     public void close() throws Exception {
 278         for (NotificationTopicRegistration streamReg : notificationTopicRegistrations.values()) {
 279             streamReg.close();
 280         }
 281     }
 282
 283     @Override
 284     public NodeKey getSourceNodeKey() {
 285         return mount.getNode().getKey();
 286     }
 287
 288     @Override
 289     public List<SchemaPath> getAvailableNotifications() {
 290
 291         final List<SchemaPath> availNotifList = new ArrayList<>();
 292         // add Event Source Connection status notification
 293         availNotifList.add(ConnectionNotificationTopicRegistration.EVENT_SOURCE_STATUS_PATH);
 294
 295         final Set<NotificationDefinition> availableNotifications = mount.getSchemaContext()
 296                 .getNotifications();
 297         // add all known notifications from netconf device
 298         for (final NotificationDefinition nd : availableNotifications) {
 299             availNotifList.add(nd.getPath());
 300         }
 301         return availNotifList;
 302     }
 303
 304     NetconfEventSourceMount getMount() {
 305         return mount;
 306     }
 307
 308 }