binding/mdsal-binding-dom-adapter/src/main/java/org/opendaylight/mdsal/binding/dom/adapter/AbstractInstanceNotificationListenerAdapter.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.mdsal.binding.dom.adapter;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import java.util.concurrent.Executor;
  13 import org.eclipse.jdt.annotation.NonNull;
  14 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  15 import org.opendaylight.mdsal.dom.api.DOMEvent;
  16 import org.opendaylight.mdsal.dom.api.DOMInstanceNotificationListener;
  17 import org.opendaylight.mdsal.dom.api.DOMNotification;
  18 import org.opendaylight.yangtools.yang.binding.DataObject;
  19 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  20 import org.opendaylight.yangtools.yang.binding.InstanceNotification;
  21 import org.slf4j.Logger;
  22 import org.slf4j.LoggerFactory;
  23
  24 abstract class AbstractInstanceNotificationListenerAdapter<P extends DataObject, N extends InstanceNotification<N, P>,
  25         L> implements DOMInstanceNotificationListener {
  26     private static final Logger LOG = LoggerFactory.getLogger(AbstractInstanceNotificationListenerAdapter.class);
  27
  28     private final @NonNull AdapterContext adapterContext;
  29     private final @NonNull Class<N> notificationClass;
  30     private final @NonNull Executor executor;
  31     private final @NonNull L delegate;
  32
  33     AbstractInstanceNotificationListenerAdapter(final AdapterContext adapterContext, final Class<N> nofiticationClass,
  34             final L delegate, final Executor executor) {
  35         this.adapterContext = requireNonNull(adapterContext);
  36         this.notificationClass = requireNonNull(nofiticationClass);
  37         this.delegate = requireNonNull(delegate);
  38         this.executor = requireNonNull(executor);
  39     }
  40
  41     @Override
  42     public final void onNotification(final DOMDataTreeIdentifier path, final DOMNotification notification) {
  43         final var serializer = adapterContext.currentSerializer();
  44         final var bindingNotification = notification instanceof DOMEvent
  45             ? serializer.fromNormalizedNodeNotification(notification.getType(), notification.getBody(),
  46                 ((DOMEvent) notification).getEventInstant())
  47                 : serializer.fromNormalizedNodeNotification(notification.getType(), notification.getBody());
  48
  49         final N castNotification;
  50         try {
  51             castNotification = notificationClass.cast(bindingNotification);
  52         } catch (ClassCastException e) {
  53             LOG.warn("Mismatched notification type {}, not notifying listener", notification.getType(), e);
  54             return;
  55         }
  56
  57         final var bindingPath = serializer.fromYangInstanceIdentifier(path.getRootIdentifier());
  58         executor.execute(() -> onNotification(delegate, bindingPath, castNotification));
  59     }
  60
  61     abstract void onNotification(@NonNull L delegate, @NonNull InstanceIdentifier<?> path, @NonNull N notification);
  62 }