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.List;
  11 import org.opendaylight.mdsal.binding.api.DataBroker;
  12 import org.opendaylight.mdsal.binding.api.DataTreeChangeListener;
  13 import org.opendaylight.mdsal.binding.api.DataTreeIdentifier;
  14 import org.opendaylight.mdsal.binding.api.DataTreeModification;
  15 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  16 import org.opendaylight.netconf.server.api.notifications.BaseNotificationPublisherRegistration;
  17 import org.opendaylight.netconf.server.api.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.NetconfSessionEndBuilder;
  23 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.notifications.rev120206.NetconfSessionStartBuilder;
  24 import org.opendaylight.yangtools.concepts.Registration;
  25 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  26 import org.osgi.service.component.annotations.Activate;
  27 import org.osgi.service.component.annotations.Component;
  28 import org.osgi.service.component.annotations.Deactivate;
  29 import org.osgi.service.component.annotations.Reference;
  30 import org.slf4j.Logger;
  31 import org.slf4j.LoggerFactory;
  32
  33 /**
  34  * Listens on changes in NetconfState/Sessions/Session datastore and publishes them.
  35  */
  36 @Component(service = { })
  37 public final class SessionNotificationProducer implements DataTreeChangeListener<Session>, AutoCloseable {
  38     private static final Logger LOG = LoggerFactory.getLogger(SessionNotificationProducer.class);
  39
  40     private final BaseNotificationPublisherRegistration baseNotificationPublisherRegistration;
  41     private final Registration sessionListenerRegistration;
  42
  43     @Activate
  44     public SessionNotificationProducer(
  45             @Reference(target = "(type=netconf-notification-manager)") final NetconfNotificationCollector notifManager,
  46             @Reference final DataBroker dataBroker) {
  47         baseNotificationPublisherRegistration = notifManager.registerBaseNotificationPublisher();
  48         sessionListenerRegistration = dataBroker.registerDataTreeChangeListener(
  49             DataTreeIdentifier.of(LogicalDatastoreType.OPERATIONAL,
  50                 InstanceIdentifier.builder(NetconfState.class).child(Sessions.class).child(Session.class).build()),
  51             this);
  52     }
  53
  54     @Override
  55     @Deactivate
  56     public void close() {
  57         if (baseNotificationPublisherRegistration != null) {
  58             baseNotificationPublisherRegistration.close();
  59         }
  60         if (sessionListenerRegistration != null) {
  61             sessionListenerRegistration.close();
  62         }
  63     }
  64
  65     @Override
  66     public void onDataTreeChanged(final List<DataTreeModification<Session>> changes) {
  67         for (var change : changes) {
  68             final var rootNode = change.getRootNode();
  69             final var modificationType = rootNode.modificationType();
  70             switch (modificationType) {
  71                 case WRITE:
  72                     final Session created = rootNode.dataAfter();
  73                     if (created != null && rootNode.dataBefore() == null) {
  74                         publishStartedSession(created);
  75                     }
  76                     break;
  77                 case DELETE:
  78                     final Session removed = rootNode.dataBefore();
  79                     if (removed != null) {
  80                         publishEndedSession(removed);
  81                     }
  82                     break;
  83                 default:
  84                     LOG.debug("Received intentionally unhandled type: {}.", modificationType);
  85             }
  86         }
  87     }
  88
  89     private void publishStartedSession(final Session session) {
  90         baseNotificationPublisherRegistration.onSessionStarted(new NetconfSessionStartBuilder()
  91             .setSessionId(new SessionIdOrZeroType(session.getSessionId()))
  92             .setSourceHost(session.getSourceHost().getIpAddress())
  93             .setUsername(session.getUsername())
  94             .build());
  95     }
  96
  97     private void publishEndedSession(final Session session) {
  98         baseNotificationPublisherRegistration.onSessionEnded(new NetconfSessionEndBuilder()
  99             .setSessionId(new SessionIdOrZeroType(session.getSessionId()))
 100             .setSourceHost(session.getSourceHost().getIpAddress())
 101             .setUsername(session.getUsername())
 102             .build());
 103     }
 104 }