apps/netconf-events-mdsal/src/main/java/org/opendaylight/netconf/server/events/mdsal/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.events.mdsal;
   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.DataTreeModification;
  14 import org.opendaylight.netconf.notifications.BaseNotificationPublisherRegistration;
  15 import org.opendaylight.netconf.notifications.NetconfNotificationCollector;
  16 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netconf.base._1._0.rev110601.SessionIdOrZeroType;
  17 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.NetconfState;
  18 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.Sessions;
  19 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.sessions.Session;
  20 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.notifications.rev120206.NetconfSessionEndBuilder;
  21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.notifications.rev120206.NetconfSessionStartBuilder;
  22 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  23 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  24 import org.osgi.service.component.annotations.Activate;
  25 import org.osgi.service.component.annotations.Component;
  26 import org.osgi.service.component.annotations.Deactivate;
  27 import org.osgi.service.component.annotations.Reference;
  28 import org.slf4j.Logger;
  29 import org.slf4j.LoggerFactory;
  30
  31 /**
  32  * Listens on changes in NetconfState/Sessions/Session datastore and publishes them.
  33  */
  34 @Component(service = { })
  35 public class SessionNotificationProducer extends OperationalDatastoreListener<Session> {
  36     private static final Logger LOG = LoggerFactory.getLogger(SessionNotificationProducer.class);
  37     private static final InstanceIdentifier<Session> SESSION_INSTANCE_IDENTIFIER =
  38             InstanceIdentifier.builder(NetconfState.class).child(Sessions.class).child(Session.class).build();
  39
  40     private final BaseNotificationPublisherRegistration baseNotificationPublisherRegistration;
  41     private final ListenerRegistration<?> sessionListenerRegistration;
  42
  43     @Activate
  44     public SessionNotificationProducer(
  45             @Reference(target = "(type=netconf-notification-manager)") final NetconfNotificationCollector notifManager,
  46             @Reference final DataBroker dataBroker) {
  47         super(SESSION_INSTANCE_IDENTIFIER);
  48
  49         baseNotificationPublisherRegistration = notifManager.registerBaseNotificationPublisher();
  50         sessionListenerRegistration = registerOnChanges(dataBroker);
  51     }
  52
  53     @Deactivate
  54     public void close() {
  55         if (baseNotificationPublisherRegistration != null) {
  56             baseNotificationPublisherRegistration.close();
  57         }
  58         if (sessionListenerRegistration != null) {
  59             sessionListenerRegistration.close();
  60         }
  61     }
  62
  63     @Override
  64     public void onDataTreeChanged(final Collection<DataTreeModification<Session>> changes) {
  65         for (DataTreeModification<Session> change : changes) {
  66             final DataObjectModification<Session> rootNode = change.getRootNode();
  67             final DataObjectModification.ModificationType modificationType = rootNode.getModificationType();
  68             switch (modificationType) {
  69                 case WRITE:
  70                     final Session created = rootNode.getDataAfter();
  71                     if (created != null && rootNode.getDataBefore() == null) {
  72                         publishStartedSession(created);
  73                     }
  74                     break;
  75                 case DELETE:
  76                     final Session removed = rootNode.getDataBefore();
  77                     if (removed != null) {
  78                         publishEndedSession(removed);
  79                     }
  80                     break;
  81                 default:
  82                     LOG.debug("Received intentionally unhandled type: {}.", modificationType);
  83             }
  84         }
  85     }
  86
  87     private void publishStartedSession(final Session session) {
  88         baseNotificationPublisherRegistration.onSessionStarted(new NetconfSessionStartBuilder()
  89             .setSessionId(new SessionIdOrZeroType(session.getSessionId()))
  90             .setSourceHost(session.getSourceHost().getIpAddress())
  91             .setUsername(session.getUsername())
  92             .build());
  93     }
  94
  95     private void publishEndedSession(final Session session) {
  96         baseNotificationPublisherRegistration.onSessionEnded(new NetconfSessionEndBuilder()
  97             .setSessionId(new SessionIdOrZeroType(session.getSessionId()))
  98             .setSourceHost(session.getSourceHost().getIpAddress())
  99             .setUsername(session.getUsername())
 100             .build());
 101     }
 102 }