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.DataObjectModification;
  14 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  15 import org.opendaylight.netconf.notifications.BaseNotificationPublisherRegistration;
  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.NetconfSessionEnd;
  21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.notifications.rev120206.NetconfSessionEndBuilder;
  22 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.notifications.rev120206.NetconfSessionStart;
  23 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.notifications.rev120206.NetconfSessionStartBuilder;
  24 import org.opendaylight.yangtools.yang.binding.DataObject;
  25 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  26
  27 /**
  28  * Listens on changes in NetconfState/Sessions/Session datastore and publishes them
  29  */
  30 public class SessionNotificationProducer extends OperationalDatastoreListener<Session> {
  31
  32     private static final InstanceIdentifier<Session> SESSION_INSTANCE_IDENTIFIER =
  33             InstanceIdentifier.create(NetconfState.class).child(Sessions.class).child(Session.class);
  34     private final BaseNotificationPublisherRegistration baseNotificationPublisherRegistration;
  35
  36     public SessionNotificationProducer(BaseNotificationPublisherRegistration baseNotificationPublisherRegistration) {
  37         super(SESSION_INSTANCE_IDENTIFIER);
  38         this.baseNotificationPublisherRegistration = baseNotificationPublisherRegistration;
  39     }
  40
  41     @Override
  42     public void onDataTreeChanged(@Nonnull Collection<DataTreeModification<Session>> changes) {
  43         for (DataTreeModification<Session> change : changes) {
  44             final DataObjectModification<Session> rootNode = change.getRootNode();
  45             final DataObjectModification.ModificationType modificationType = rootNode.getModificationType();
  46             switch (modificationType) {
  47                 case WRITE:
  48                     final Session created = rootNode.getDataAfter();
  49                     if (created != null && rootNode.getDataBefore() == null) {
  50                         publishStartedSession(created);
  51                     }
  52                     break;
  53                 case DELETE:
  54                     final Session removed = rootNode.getDataBefore();
  55                     if (removed != null) {
  56                         publishEndedSession(removed);
  57                     }
  58                     break;
  59             }
  60         }
  61     }
  62
  63     private void publishStartedSession(DataObject dataObject) {
  64         Preconditions.checkArgument(dataObject instanceof Session);
  65         Session session = (Session) dataObject;
  66         final NetconfSessionStart sessionStart = new NetconfSessionStartBuilder()
  67                 .setSessionId(new SessionIdOrZeroType(session.getSessionId()))
  68                 .setSourceHost(session.getSourceHost().getIpAddress())
  69                 .setUsername(session.getUsername())
  70                 .build();
  71         baseNotificationPublisherRegistration.onSessionStarted(sessionStart);
  72     }
  73
  74     private void publishEndedSession(DataObject dataObject) {
  75         Preconditions.checkArgument(dataObject instanceof Session);
  76         Session session = (Session) dataObject;
  77         final NetconfSessionEnd sessionEnd = new NetconfSessionEndBuilder()
  78                 .setSessionId(new SessionIdOrZeroType(session.getSessionId()))
  79                 .setSourceHost(session.getSourceHost().getIpAddress())
  80                 .setUsername(session.getUsername())
  81                 .build();
  82         baseNotificationPublisherRegistration.onSessionEnded(sessionEnd);
  83     }
  84
  85 }