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

   1 /*
   2  * Copyright (c) 2015 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
   9 package org.opendaylight.controller.config.yang.netconf.mdsal.notification;
  10
  11 import com.google.common.collect.ImmutableList;
  12 import com.google.common.collect.ImmutableSet;
  13 import com.google.common.collect.Sets;
  14 import java.util.Collection;
  15 import java.util.Collections;
  16 import java.util.Set;
  17 import javax.annotation.Nonnull;
  18 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  19 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  20 import org.opendaylight.netconf.notifications.BaseNotificationPublisherRegistration;
  21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Uri;
  22 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.NetconfState;
  23 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.Capabilities;
  24 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.notifications.rev120206.NetconfCapabilityChangeBuilder;
  25 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.notifications.rev120206.changed.by.parms.ChangedByBuilder;
  26 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.notifications.rev120206.changed.by.parms.changed.by.server.or.user.ServerBuilder;
  27 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  28
  29
  30 /**
  31  * Listens on capabilities changes in data store and publishes them to base
  32  * netconf notification stream listener.
  33  */
  34 final class CapabilityChangeNotificationProducer extends OperationalDatastoreListener<Capabilities> {
  35
  36     private static final InstanceIdentifier<Capabilities> CAPABILITIES_INSTANCE_IDENTIFIER =
  37             InstanceIdentifier.create(NetconfState.class).child(Capabilities.class);
  38     private final BaseNotificationPublisherRegistration baseNotificationPublisherRegistration;
  39
  40     public CapabilityChangeNotificationProducer(BaseNotificationPublisherRegistration baseNotificationPublisherRegistration) {
  41         super(CAPABILITIES_INSTANCE_IDENTIFIER);
  42         this.baseNotificationPublisherRegistration = baseNotificationPublisherRegistration;
  43     }
  44
  45     @Override
  46     public void onDataTreeChanged(@Nonnull Collection<DataTreeModification<Capabilities>> changes) {
  47         for (DataTreeModification<Capabilities> change : changes) {
  48             final DataObjectModification<Capabilities> rootNode = change.getRootNode();
  49             final DataObjectModification.ModificationType modificationType = rootNode.getModificationType();
  50             switch (modificationType) {
  51                 case WRITE: {
  52                     final Capabilities dataAfter = rootNode.getDataAfter();
  53                     final Capabilities dataBefore = rootNode.getDataBefore();
  54                     final Set<Uri> before = dataBefore != null ? ImmutableSet.copyOf(dataBefore.getCapability()) : Collections.emptySet();
  55                     final Set<Uri> after = dataAfter != null ? ImmutableSet.copyOf(dataAfter.getCapability()) : Collections.emptySet();
  56                     final Set<Uri> added = Sets.difference(after, before);
  57                     final Set<Uri> removed = Sets.difference(before, after);
  58                     publishNotification(added, removed);
  59                     break;
  60                 }
  61                 case DELETE: {
  62                     final Capabilities dataBeforeDelete = rootNode.getDataBefore();
  63                     if (dataBeforeDelete != null) {
  64                         final Set<Uri> removed = ImmutableSet.copyOf(dataBeforeDelete.getCapability());
  65                         publishNotification(Collections.emptySet(), removed);
  66                     }
  67                     break;
  68                 }
  69             }
  70         }
  71
  72     }
  73
  74     private void publishNotification(Set<Uri> added, Set<Uri> removed) {
  75         final NetconfCapabilityChangeBuilder netconfCapabilityChangeBuilder = new NetconfCapabilityChangeBuilder();
  76         netconfCapabilityChangeBuilder.setChangedBy(new ChangedByBuilder().setServerOrUser(new ServerBuilder().setServer(true).build()).build());
  77         netconfCapabilityChangeBuilder.setAddedCapability(ImmutableList.copyOf(added));
  78         netconfCapabilityChangeBuilder.setDeletedCapability(ImmutableList.copyOf(removed));
  79         // TODO modified should be computed ... but why ?
  80         netconfCapabilityChangeBuilder.setModifiedCapability(Collections.<Uri>emptyList());
  81         baseNotificationPublisherRegistration.onCapabilityChanged(netconfCapabilityChangeBuilder.build());
  82     }
  83 }