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