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.CheckedFuture;
  12 import com.google.common.util.concurrent.FutureCallback;
  13 import com.google.common.util.concurrent.Futures;
  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.controller.md.sal.common.api.data.TransactionCommitFailedException;
  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
  38     private final NetconfNotificationCollector netconfNotificationCollector;
  39     private final DataBroker dataBroker;
  40     private NotificationRegistration notificationRegistration;
  41
  42     public NotificationToMdsalWriter(final NetconfNotificationCollector netconfNotificationCollector,
  43                                      final DataBroker dataBroker) {
  44         this.netconfNotificationCollector = netconfNotificationCollector;
  45         this.dataBroker = dataBroker;
  46     }
  47
  48     @Override
  49     public void close() {
  50         final WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
  51         tx.delete(LogicalDatastoreType.OPERATIONAL, InstanceIdentifier.create(Netconf.class));
  52         final CheckedFuture<Void, TransactionCommitFailedException> submit = tx.submit();
  53
  54         Futures.addCallback(submit, new FutureCallback<Void>() {
  55             @Override
  56             public void onSuccess(Void avoid) {
  57                 LOG.debug("Streams cleared successfully");
  58             }
  59
  60             @Override
  61             public void onFailure(Throwable throwable) {
  62                 LOG.warn("Unable to clear streams", throwable);
  63             }
  64         });
  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(Stream stream) {
  78         final WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
  79
  80         final InstanceIdentifier streamIdentifier = InstanceIdentifier.create(Netconf.class).child(Streams.class)
  81                 .builder().child(Stream.class, stream.getKey()).build();
  82         tx.merge(LogicalDatastoreType.OPERATIONAL, streamIdentifier, stream, true);
  83
  84         try {
  85             tx.submit().checkedGet();
  86             LOG.debug("Stream %s registered successfully.", stream.getName());
  87         } catch (TransactionCommitFailedException e) {
  88             LOG.warn("Unable to register stream.", e);
  89         }
  90     }
  91
  92     @Override
  93     public void onStreamUnregistered(StreamNameType stream) {
  94         final WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
  95
  96         final StreamKey streamKey = new StreamKey(stream);
  97         final InstanceIdentifier streamIdentifier = InstanceIdentifier.create(Netconf.class).child(Streams.class)
  98                 .builder().child(Stream.class, streamKey).build();
  99
 100         tx.delete(LogicalDatastoreType.OPERATIONAL, streamIdentifier);
 101
 102         try {
 103             tx.submit().checkedGet();
 104             LOG.debug("Stream %s unregistered successfully.", stream);
 105         } catch (TransactionCommitFailedException e) {
 106             LOG.warn("Unable to unregister stream", e);
 107         }
 108     }
 109 }