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 com.google.common.util.concurrent.MoreExecutors;
  15 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  16 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  17 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  18 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
  19 import org.opendaylight.netconf.notifications.NetconfNotificationCollector;
  20 import org.opendaylight.netconf.notifications.NotificationRegistration;
  21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netconf.notification._1._0.rev080714.StreamNameType;
  22 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netmod.notification.rev080714.Netconf;
  23 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netmod.notification.rev080714.netconf.Streams;
  24 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netmod.notification.rev080714.netconf.streams.Stream;
  25 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netmod.notification.rev080714.netconf.streams.StreamKey;
  26 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 /**
  31  * Listens on changes in netconf notification stream availability and writes
  32  * changes to the data store.
  33  */
  34 public final class NotificationToMdsalWriter implements AutoCloseable, NetconfNotificationCollector
  35         .NetconfNotificationStreamListener {
  36
  37     private static final Logger LOG = LoggerFactory.getLogger(NotificationToMdsalWriter.class);
  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         final CheckedFuture<Void, TransactionCommitFailedException> submit = tx.submit();
  54
  55         Futures.addCallback(submit, new FutureCallback<Void>() {
  56             @Override
  57             public void onSuccess(Void avoid) {
  58                 LOG.debug("Streams cleared successfully");
  59             }
  60
  61             @Override
  62             public void onFailure(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(Stream stream) {
  79         final WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
  80
  81         final InstanceIdentifier streamIdentifier = InstanceIdentifier.create(Netconf.class).child(Streams.class)
  82                 .builder().child(Stream.class, stream.getKey()).build();
  83         tx.merge(LogicalDatastoreType.OPERATIONAL, streamIdentifier, stream, true);
  84
  85         try {
  86             tx.submit().checkedGet();
  87             LOG.debug("Stream %s registered successfully.", stream.getName());
  88         } catch (TransactionCommitFailedException e) {
  89             LOG.warn("Unable to register stream.", e);
  90         }
  91     }
  92
  93     @Override
  94     public void onStreamUnregistered(StreamNameType stream) {
  95         final WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
  96
  97         final StreamKey streamKey = new StreamKey(stream);
  98         final InstanceIdentifier streamIdentifier = InstanceIdentifier.create(Netconf.class).child(Streams.class)
  99                 .builder().child(Stream.class, streamKey).build();
 100
 101         tx.delete(LogicalDatastoreType.OPERATIONAL, streamIdentifier);
 102
 103         try {
 104             tx.submit().checkedGet();
 105             LOG.debug("Stream %s unregistered successfully.", stream);
 106         } catch (TransactionCommitFailedException e) {
 107             LOG.warn("Unable to unregister stream", e);
 108         }
 109     }
 110 }