binding/mdsal-binding-dom-adapter/src/main/java/org/opendaylight/mdsal/binding/dom/adapter/BindingDOMNotificationListenerAdapter.java

   1 /*
   2  * Copyright (c) 2021 PANTHEON.tech, s.r.o. 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 com.google.common.base.Verify.verify;
  11 import static com.google.common.base.Verify.verifyNotNull;
  12 import static java.util.Objects.requireNonNull;
  13
  14 import java.util.concurrent.Executor;
  15 import org.eclipse.jdt.annotation.NonNull;
  16 import org.opendaylight.mdsal.binding.api.NotificationService.CompositeListener.Component;
  17 import org.opendaylight.mdsal.binding.api.NotificationService.Listener;
  18 import org.opendaylight.mdsal.binding.spec.reflect.BindingReflections;
  19 import org.opendaylight.mdsal.dom.api.DOMEvent;
  20 import org.opendaylight.mdsal.dom.api.DOMNotification;
  21 import org.opendaylight.mdsal.dom.api.DOMNotificationListener;
  22 import org.opendaylight.yangtools.yang.binding.DataObject;
  23 import org.opendaylight.yangtools.yang.binding.Notification;
  24 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Absolute;
  25
  26 final class BindingDOMNotificationListenerAdapter<N extends Notification<N> & DataObject>
  27         implements DOMNotificationListener {
  28     private final AdapterContext adapterContext;
  29     private final Listener<N> delegate;
  30     private final Executor executor;
  31     private final Class<N> type;
  32
  33     BindingDOMNotificationListenerAdapter(final AdapterContext adapterContext, final Class<N> type,
  34             final Listener<N> delegate, final Executor executor) {
  35         this.adapterContext = requireNonNull(adapterContext);
  36         this.type = requireNonNull(type);
  37         this.delegate = requireNonNull(delegate);
  38         this.executor = requireNonNull(executor);
  39     }
  40
  41     BindingDOMNotificationListenerAdapter(final AdapterContext adapterContext, final Component<N> component,
  42             final Executor executor) {
  43         this(adapterContext, component.type(), component.listener(), executor);
  44     }
  45
  46     @NonNull Absolute schemaPath() {
  47         return Absolute.of(BindingReflections.findQName(type));
  48     }
  49
  50     @Override
  51     public void onNotification(final DOMNotification notification) {
  52         final var binding = type.cast(verifyNotNull(deserialize(notification)));
  53         executor.execute(() -> delegate.onNotification(binding));
  54     }
  55
  56     private Notification<?> deserialize(final DOMNotification notification) {
  57         if (notification instanceof LazySerializedNotification lazy) {
  58             // TODO: This is a routed-back notification, for which we may end up losing event time here, but that is
  59             //       okay, for now at least.
  60             return lazy.getBindingData();
  61         }
  62
  63         final var serializer = adapterContext.currentSerializer();
  64         final var result = notification instanceof DOMEvent domEvent
  65             ? serializer.fromNormalizedNodeNotification(notification.getType(), notification.getBody(),
  66                 domEvent.getEventInstant())
  67                 : serializer.fromNormalizedNodeNotification(notification.getType(), notification.getBody());
  68         verify(result instanceof Notification, "Unexpected codec result %s", result);
  69         return (Notification<?>) result;
  70     }
  71 }