opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DefaultShardDataChangeListenerPublisher.java

   1 /*
   2  * Copyright (c) 2016 Brocade Communications 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.controller.cluster.datastore;
   9
  10 import javax.annotation.concurrent.NotThreadSafe;
  11 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
  12 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
  13 import org.opendaylight.controller.md.sal.dom.store.impl.DOMImmutableDataChangeEvent;
  14 import org.opendaylight.controller.md.sal.dom.store.impl.DataChangeListenerRegistration;
  15 import org.opendaylight.controller.md.sal.dom.store.impl.ResolveDataChangeEventsTask;
  16 import org.opendaylight.controller.md.sal.dom.store.impl.tree.ListenerTree;
  17 import org.opendaylight.yangtools.util.concurrent.NotificationManager;
  18 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  19 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  20 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
  21 import org.slf4j.Logger;
  22 import org.slf4j.LoggerFactory;
  23
  24 /**
  25  * Default implementation of ShardDataChangeListenerPublisher that directly generates and publishes
  26  * notifications for DataChangeListeners.
  27  *
  28  * @author Thomas Pantelis
  29  */
  30 @NotThreadSafe
  31 final class DefaultShardDataChangeListenerPublisher implements ShardDataChangeListenerPublisher,
  32         NotificationManager<DataChangeListenerRegistration<?>, DOMImmutableDataChangeEvent> {
  33     private static final Logger LOG = LoggerFactory.getLogger(DefaultShardDataChangeListenerPublisher.class);
  34
  35     private final ListenerTree dataChangeListenerTree = ListenerTree.create();
  36
  37     @Override
  38     public void submitNotification(final DataChangeListenerRegistration<?> listener,
  39             final DOMImmutableDataChangeEvent notification) {
  40         LOG.debug("Notifying listener {} about {}", listener.getInstance(), notification);
  41
  42         listener.getInstance().onDataChanged(notification);
  43     }
  44
  45     @Override
  46     public void submitNotifications(final DataChangeListenerRegistration<?> listener,
  47             final Iterable<DOMImmutableDataChangeEvent> notifications) {
  48         final AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> instance = listener.getInstance();
  49         LOG.debug("Notifying listener {} about {}", instance, notifications);
  50
  51         for (DOMImmutableDataChangeEvent n : notifications) {
  52             instance.onDataChanged(n);
  53         }
  54     }
  55
  56     @Override
  57     public void publishChanges(DataTreeCandidate candidate, String logContext) {
  58         ResolveDataChangeEventsTask.create(candidate, dataChangeListenerTree).resolve(this);
  59     }
  60
  61     @Override
  62     public <L extends AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>>
  63             DataChangeListenerRegistration<L> registerDataChangeListener(YangInstanceIdentifier path, L listener,
  64                     DataChangeScope scope) {
  65         return dataChangeListenerTree.registerDataChangeListener(path, listener, scope);
  66     }
  67
  68     @Override
  69     public ShardDataChangeListenerPublisher newInstance() {
  70         return new DefaultShardDataChangeListenerPublisher();
  71     }
  72 }