netconf/mdsal-netconf-notification/src/main/java/org/opendaylight/controller/config/yang/netconf/mdsal/notification/NotificationToMdsalWriter.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 package org.opendaylight.controller.config.yang.netconf.mdsal.notification;
   9
  10 import com.google.common.util.concurrent.FutureCallback;
  11 import com.google.common.util.concurrent.MoreExecutors;
  12 import java.util.concurrent.ExecutionException;
  13 import org.opendaylight.mdsal.binding.api.DataBroker;
  14 import org.opendaylight.mdsal.binding.api.WriteTransaction;
  15 import org.opendaylight.mdsal.common.api.CommitInfo;
  16 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  17 import org.opendaylight.netconf.notifications.NetconfNotificationCollector;
  18 import org.opendaylight.netconf.notifications.NotificationRegistration;
  19 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netconf.notification._1._0.rev080714.StreamNameType;
  20 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netmod.notification.rev080714.Netconf;
  21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netmod.notification.rev080714.netconf.Streams;
  22 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netmod.notification.rev080714.netconf.streams.Stream;
  23 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netmod.notification.rev080714.netconf.streams.StreamKey;
  24 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  25 import org.slf4j.Logger;
  26 import org.slf4j.LoggerFactory;
  27
  28 /**
  29  * Listens on changes in netconf notification stream availability and writes
  30  * changes to the data store.
  31  */
  32 public final class NotificationToMdsalWriter implements AutoCloseable, NetconfNotificationCollector
  33         .NetconfNotificationStreamListener {
  34
  35     private static final Logger LOG = LoggerFactory.getLogger(NotificationToMdsalWriter.class);
  36     private static final InstanceIdentifier<Streams> STREAMS = InstanceIdentifier.builder(Netconf.class)
  37             .child(Streams.class).build();
  38
  39     private final NetconfNotificationCollector netconfNotificationCollector;
  40     private final DataBroker dataBroker;
  41     private NotificationRegistration notificationRegistration;
  42
  43     public NotificationToMdsalWriter(final NetconfNotificationCollector netconfNotificationCollector,
  44                                      final DataBroker dataBroker) {
  45         this.netconfNotificationCollector = netconfNotificationCollector;
  46         this.dataBroker = dataBroker;
  47     }
  48
  49     @Override
  50     public void close() {
  51         final WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
  52         tx.delete(LogicalDatastoreType.OPERATIONAL, InstanceIdentifier.create(Netconf.class));
  53
  54         tx.commit().addCallback(new FutureCallback<CommitInfo>() {
  55             @Override
  56             public void onSuccess(final CommitInfo info) {
  57                 LOG.debug("Streams cleared successfully");
  58             }
  59
  60             @Override
  61             public void onFailure(final Throwable throwable) {
  62                 LOG.warn("Unable to clear streams", throwable);
  63             }
  64         }, MoreExecutors.directExecutor());
  65
  66         notificationRegistration.close();
  67     }
  68
  69     /**
  70      * Invoked by blueprint.
  71      */
  72     public void start() {
  73         notificationRegistration = netconfNotificationCollector.registerStreamListener(this);
  74     }
  75
  76     @Override
  77     public void onStreamRegistered(final Stream stream) {
  78         final WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
  79
  80         final InstanceIdentifier<Stream> streamIdentifier = STREAMS.child(Stream.class, stream.key());
  81         tx.merge(LogicalDatastoreType.OPERATIONAL, streamIdentifier, stream, true);
  82
  83         try {
  84             tx.commit().get();
  85             LOG.debug("Stream {} registered successfully.", stream.getName());
  86         } catch (InterruptedException | ExecutionException e) {
  87             LOG.warn("Unable to register stream {}.", stream, e);
  88         }
  89     }
  90
  91     @Override
  92     public void onStreamUnregistered(final StreamNameType stream) {
  93         final WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
  94
  95         final InstanceIdentifier<Stream> streamIdentifier = STREAMS.child(Stream.class, new StreamKey(stream));
  96
  97         tx.delete(LogicalDatastoreType.OPERATIONAL, streamIdentifier);
  98
  99         try {
 100             tx.commit().get();
 101             LOG.debug("Stream {} unregistered successfully.", stream);
 102         } catch (InterruptedException | ExecutionException e) {
 103             LOG.warn("Unable to unregister stream {}", stream, e);
 104         }
 105     }
 106 }