netconf/mdsal-netconf-notification/src/main/java/org/opendaylight/controller/config/yang/netconf/mdsal/notification/SessionNotificationProducer.java

   1 /*
   2  * Copyright (c) 2016 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 package org.opendaylight.controller.config.yang.netconf.mdsal.notification;
   9
  10 import com.google.common.base.Preconditions;
  11 import java.util.Collection;
  12 import javax.annotation.Nonnull;
  13 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  14 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  15 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  16 import org.opendaylight.netconf.notifications.BaseNotificationPublisherRegistration;
  17 import org.opendaylight.netconf.notifications.NetconfNotificationCollector;
  18 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netconf.base._1._0.rev110601.SessionIdOrZeroType;
  19 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.NetconfState;
  20 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.Sessions;
  21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.sessions.Session;
  22 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.notifications.rev120206.NetconfSessionEnd;
  23 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.notifications.rev120206.NetconfSessionEndBuilder;
  24 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.notifications.rev120206.NetconfSessionStart;
  25 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.notifications.rev120206.NetconfSessionStartBuilder;
  26 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  27 import org.opendaylight.yangtools.yang.binding.DataObject;
  28 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  29
  30 /**
  31  * Listens on changes in NetconfState/Sessions/Session datastore and publishes them
  32  */
  33 public class SessionNotificationProducer extends OperationalDatastoreListener<Session> {
  34
  35     private static final InstanceIdentifier<Session> SESSION_INSTANCE_IDENTIFIER =
  36             InstanceIdentifier.create(NetconfState.class).child(Sessions.class).child(Session.class);
  37
  38     private final BaseNotificationPublisherRegistration baseNotificationPublisherRegistration;
  39     private final ListenerRegistration sessionListenerRegistration;
  40
  41     public SessionNotificationProducer(final NetconfNotificationCollector netconfNotificationCollector,
  42                                        final DataBroker dataBroker) {
  43         super(SESSION_INSTANCE_IDENTIFIER);
  44
  45         this.baseNotificationPublisherRegistration = netconfNotificationCollector.registerBaseNotificationPublisher();
  46         this.sessionListenerRegistration = registerOnChanges(dataBroker);
  47     }
  48
  49     @Override
  50     public void onDataTreeChanged(@Nonnull Collection<DataTreeModification<Session>> changes) {
  51         for (DataTreeModification<Session> change : changes) {
  52             final DataObjectModification<Session> rootNode = change.getRootNode();
  53             final DataObjectModification.ModificationType modificationType = rootNode.getModificationType();
  54             switch (modificationType) {
  55                 case WRITE:
  56                     final Session created = rootNode.getDataAfter();
  57                     if (created != null && rootNode.getDataBefore() == null) {
  58                         publishStartedSession(created);
  59                     }
  60                     break;
  61                 case DELETE:
  62                     final Session removed = rootNode.getDataBefore();
  63                     if (removed != null) {
  64                         publishEndedSession(removed);
  65                     }
  66                     break;
  67             }
  68         }
  69     }
  70
  71     private void publishStartedSession(DataObject dataObject) {
  72         Preconditions.checkArgument(dataObject instanceof Session);
  73         Session session = (Session) dataObject;
  74         final NetconfSessionStart sessionStart = new NetconfSessionStartBuilder()
  75                 .setSessionId(new SessionIdOrZeroType(session.getSessionId()))
  76                 .setSourceHost(session.getSourceHost().getIpAddress())
  77                 .setUsername(session.getUsername())
  78                 .build();
  79         baseNotificationPublisherRegistration.onSessionStarted(sessionStart);
  80     }
  81
  82     private void publishEndedSession(DataObject dataObject) {
  83         Preconditions.checkArgument(dataObject instanceof Session);
  84         Session session = (Session) dataObject;
  85         final NetconfSessionEnd sessionEnd = new NetconfSessionEndBuilder()
  86                 .setSessionId(new SessionIdOrZeroType(session.getSessionId()))
  87                 .setSourceHost(session.getSourceHost().getIpAddress())
  88                 .setUsername(session.getUsername())
  89                 .build();
  90         baseNotificationPublisherRegistration.onSessionEnded(sessionEnd);
  91     }
  92
  93
  94     /**
  95      * Invoke by blueprint
  96      */
  97     public void close() {
  98         if (baseNotificationPublisherRegistration != null) {
  99             baseNotificationPublisherRegistration.close();
 100         }
 101         if (sessionListenerRegistration != null) {
 102             sessionListenerRegistration.close();
 103         }
 104     }
 105 }