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
   9 package org.opendaylight.controller.config.yang.netconf.mdsal.notification;
  10
  11 import com.google.common.util.concurrent.FutureCallback;
  12 import com.google.common.util.concurrent.MoreExecutors;
  13 import java.util.concurrent.ExecutionException;
  14 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  15 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  16 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  17 import org.opendaylight.mdsal.common.api.CommitInfo;
  18 import org.opendaylight.netconf.notifications.NetconfNotificationCollector;
  19 import org.opendaylight.netconf.notifications.NotificationRegistration;
  20 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netconf.notification._1._0.rev080714.StreamNameType;
  21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netmod.notification.rev080714.Netconf;
  22 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netmod.notification.rev080714.netconf.Streams;
  23 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netmod.notification.rev080714.netconf.streams.Stream;
  24 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netmod.notification.rev080714.netconf.streams.StreamKey;
  25 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 /**
  30  * Listens on changes in netconf notification stream availability and writes
  31  * changes to the data store.
  32  */
  33 public final class NotificationToMdsalWriter implements AutoCloseable, NetconfNotificationCollector
  34         .NetconfNotificationStreamListener {
  35
  36     private static final Logger LOG = LoggerFactory.getLogger(NotificationToMdsalWriter.class);
  37     private static final InstanceIdentifier<Streams> STREAMS = InstanceIdentifier.builder(Netconf.class)
  38             .child(Streams.class).build();
  39
  40     private final NetconfNotificationCollector netconfNotificationCollector;
  41     private final DataBroker dataBroker;
  42     private NotificationRegistration notificationRegistration;
  43
  44     public NotificationToMdsalWriter(final NetconfNotificationCollector netconfNotificationCollector,
  45                                      final DataBroker dataBroker) {
  46         this.netconfNotificationCollector = netconfNotificationCollector;
  47         this.dataBroker = dataBroker;
  48     }
  49
  50     @Override
  51     public void close() {
  52         final WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
  53         tx.delete(LogicalDatastoreType.OPERATIONAL, InstanceIdentifier.create(Netconf.class));
  54
  55         tx.commit().addCallback(new FutureCallback<CommitInfo>() {
  56             @Override
  57             public void onSuccess(final CommitInfo info) {
  58                 LOG.debug("Streams cleared successfully");
  59             }
  60
  61             @Override
  62             public void onFailure(final Throwable throwable) {
  63                 LOG.warn("Unable to clear streams", throwable);
  64             }
  65         }, MoreExecutors.directExecutor());
  66
  67         notificationRegistration.close();
  68     }
  69
  70     /**
  71      * Invoked by blueprint.
  72      */
  73     public void start() {
  74         notificationRegistration = netconfNotificationCollector.registerStreamListener(this);
  75     }
  76
  77     @Override
  78     public void onStreamRegistered(final Stream stream) {
  79         final WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
  80
  81         final InstanceIdentifier<Stream> streamIdentifier = STREAMS.child(Stream.class, stream.key());
  82         tx.merge(LogicalDatastoreType.OPERATIONAL, streamIdentifier, stream, true);
  83
  84         try {
  85             tx.commit().get();
  86             LOG.debug("Stream %s registered successfully.", stream.getName());
  87         } catch (InterruptedException | ExecutionException e) {
  88             LOG.warn("Unable to register stream.", e);
  89         }
  90     }
  91
  92     @Override
  93     public void onStreamUnregistered(final StreamNameType stream) {
  94         final WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
  95
  96         final InstanceIdentifier<Stream> streamIdentifier = STREAMS.child(Stream.class, new StreamKey(stream));
  97
  98         tx.delete(LogicalDatastoreType.OPERATIONAL, streamIdentifier);
  99
 100         try {
 101             tx.commit().get();
 102             LOG.debug("Stream %s unregistered successfully.", stream);
 103         } catch (InterruptedException | ExecutionException e) {
 104             LOG.warn("Unable to unregister stream", e);
 105         }
 106     }
 107 }