restconf/restconf-nb/src/main/java/org/opendaylight/restconf/nb/rfc8040/streams/AbstractNotificationStream.java

   1 /*
   2  * Copyright (c) 2022 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.restconf.nb.rfc8040.streams;
   9
  10 import java.time.Instant;
  11 import org.eclipse.jdt.annotation.NonNull;
  12 import org.opendaylight.mdsal.dom.api.DOMEvent;
  13 import org.opendaylight.mdsal.dom.api.DOMNotification;
  14 import org.opendaylight.mdsal.dom.api.DOMNotificationListener;
  15 import org.opendaylight.yang.gen.v1.urn.sal.restconf.event.subscription.rev231103.NotificationOutputTypeGrouping.NotificationOutputType;
  16 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  17 import org.slf4j.Logger;
  18 import org.slf4j.LoggerFactory;
  19
  20 /**
  21  * Abstract base class for functionality shared between {@link NotificationStream} and
  22  * {@link DeviceNotificationStream}.
  23  */
  24 abstract class AbstractNotificationStream extends RestconfStream<DOMNotification> implements DOMNotificationListener {
  25     private static final Logger LOG = LoggerFactory.getLogger(AbstractNotificationStream.class);
  26
  27     AbstractNotificationStream(final ListenersBroker listenersBroker, final String name,
  28             final NotificationOutputType outputType) {
  29         super(listenersBroker, name, outputType, switch (outputType) {
  30             case JSON -> JSONNotificationFormatter.FACTORY;
  31             case XML -> XMLNotificationFormatter.FACTORY;
  32         });
  33     }
  34
  35     @Override
  36     @SuppressWarnings("checkstyle:IllegalCatch")
  37     public final void onNotification(final DOMNotification notification) {
  38         final var eventInstant = notification instanceof DOMEvent domEvent ? domEvent.getEventInstant() : Instant.now();
  39         final String data;
  40         try {
  41             data = formatter().eventData(effectiveModel(), notification, eventInstant);
  42         } catch (Exception e) {
  43             LOG.error("Failed to process notification {}", notification, e);
  44             return;
  45         }
  46         if (data != null) {
  47             post(data);
  48         }
  49     }
  50
  51     abstract @NonNull EffectiveModelContext effectiveModel();
  52 }