plugins/netconf-server-mdsal/src/main/java/org/opendaylight/netconf/server/mdsal/notifications/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.netconf.server.mdsal.notifications;
   9
  10 import java.util.Collection;
  11 import org.opendaylight.mdsal.binding.api.DataBroker;
  12 import org.opendaylight.mdsal.binding.api.DataObjectModification;
  13 import org.opendaylight.mdsal.binding.api.DataTreeChangeListener;
  14 import org.opendaylight.mdsal.binding.api.DataTreeIdentifier;
  15 import org.opendaylight.mdsal.binding.api.DataTreeModification;
  16 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  17 import org.opendaylight.netconf.server.api.notifications.BaseNotificationPublisherRegistration;
  18 import org.opendaylight.netconf.server.api.notifications.NetconfNotificationCollector;
  19 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netconf.base._1._0.rev110601.SessionIdOrZeroType;
  20 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.NetconfState;
  21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.Sessions;
  22 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.sessions.Session;
  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.NetconfSessionStartBuilder;
  25 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  26 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  27 import org.osgi.service.component.annotations.Activate;
  28 import org.osgi.service.component.annotations.Component;
  29 import org.osgi.service.component.annotations.Deactivate;
  30 import org.osgi.service.component.annotations.Reference;
  31 import org.slf4j.Logger;
  32 import org.slf4j.LoggerFactory;
  33
  34 /**
  35  * Listens on changes in NetconfState/Sessions/Session datastore and publishes them.
  36  */
  37 @Component(service = { })
  38 public final class SessionNotificationProducer implements DataTreeChangeListener<Session>, AutoCloseable {
  39     private static final Logger LOG = LoggerFactory.getLogger(SessionNotificationProducer.class);
  40
  41     private final BaseNotificationPublisherRegistration baseNotificationPublisherRegistration;
  42     private final ListenerRegistration<?> sessionListenerRegistration;
  43
  44     @Activate
  45     public SessionNotificationProducer(
  46             @Reference(target = "(type=netconf-notification-manager)") final NetconfNotificationCollector notifManager,
  47             @Reference final DataBroker dataBroker) {
  48         baseNotificationPublisherRegistration = notifManager.registerBaseNotificationPublisher();
  49         sessionListenerRegistration = dataBroker.registerDataTreeChangeListener(
  50             DataTreeIdentifier.create(LogicalDatastoreType.OPERATIONAL,
  51                 InstanceIdentifier.builder(NetconfState.class).child(Sessions.class).child(Session.class).build()),
  52             this);
  53     }
  54
  55     @Override
  56     @Deactivate
  57     public void close() {
  58         if (baseNotificationPublisherRegistration != null) {
  59             baseNotificationPublisherRegistration.close();
  60         }
  61         if (sessionListenerRegistration != null) {
  62             sessionListenerRegistration.close();
  63         }
  64     }
  65
  66     @Override
  67     public void onDataTreeChanged(final Collection<DataTreeModification<Session>> changes) {
  68         for (DataTreeModification<Session> change : changes) {
  69             final DataObjectModification<Session> rootNode = change.getRootNode();
  70             final DataObjectModification.ModificationType modificationType = rootNode.getModificationType();
  71             switch (modificationType) {
  72                 case WRITE:
  73                     final Session created = rootNode.getDataAfter();
  74                     if (created != null && rootNode.getDataBefore() == null) {
  75                         publishStartedSession(created);
  76                     }
  77                     break;
  78                 case DELETE:
  79                     final Session removed = rootNode.getDataBefore();
  80                     if (removed != null) {
  81                         publishEndedSession(removed);
  82                     }
  83                     break;
  84                 default:
  85                     LOG.debug("Received intentionally unhandled type: {}.", modificationType);
  86             }
  87         }
  88     }
  89
  90     private void publishStartedSession(final Session session) {
  91         baseNotificationPublisherRegistration.onSessionStarted(new NetconfSessionStartBuilder()
  92             .setSessionId(new SessionIdOrZeroType(session.getSessionId()))
  93             .setSourceHost(session.getSourceHost().getIpAddress())
  94             .setUsername(session.getUsername())
  95             .build());
  96     }
  97
  98     private void publishEndedSession(final Session session) {
  99         baseNotificationPublisherRegistration.onSessionEnded(new NetconfSessionEndBuilder()
 100             .setSessionId(new SessionIdOrZeroType(session.getSessionId()))
 101             .setSourceHost(session.getSourceHost().getIpAddress())
 102             .setUsername(session.getUsername())
 103             .build());
 104     }
 105 }