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