restconf/restconf-nb/src/main/java/org/opendaylight/restconf/nb/rfc8040/streams/listeners/AbstractNotificationListenerAdaptor.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.listeners;
   9
  10 import java.time.Instant;
  11 import java.util.Optional;
  12 import org.eclipse.jdt.annotation.NonNull;
  13 import org.opendaylight.mdsal.dom.api.DOMEvent;
  14 import org.opendaylight.mdsal.dom.api.DOMNotification;
  15 import org.opendaylight.mdsal.dom.api.DOMNotificationListener;
  16 import org.opendaylight.yang.gen.v1.urn.sal.restconf.event.subscription.rev140708.NotificationOutputTypeGrouping.NotificationOutputType;
  17 import org.opendaylight.yangtools.yang.common.QName;
  18 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactorySupplier;
  19 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  20 import org.slf4j.Logger;
  21 import org.slf4j.LoggerFactory;
  22
  23 /**
  24  * Abstract base class for functionality shared between {@link NotificationListenerAdapter} and
  25  * {@link DeviceNotificationListenerAdaptor}.
  26  */
  27 abstract class AbstractNotificationListenerAdaptor extends AbstractCommonSubscriber<DOMNotification>
  28         implements DOMNotificationListener {
  29     private static final Logger LOG = LoggerFactory.getLogger(AbstractNotificationListenerAdaptor.class);
  30     private static final NotificationFormatterFactory JSON_FORMATTER_FACTORY =
  31         JSONNotificationFormatter.createFactory(JSONCodecFactorySupplier.RFC7951);
  32
  33     AbstractNotificationListenerAdaptor(final QName lastQName, final String streamName,
  34             final NotificationOutputType outputType) {
  35         super(lastQName, streamName, outputType, getFormatterFactory(outputType));
  36     }
  37
  38     private static NotificationFormatterFactory getFormatterFactory(final NotificationOutputType outputType) {
  39         return switch (outputType) {
  40             case JSON -> JSON_FORMATTER_FACTORY;
  41             case XML -> XMLNotificationFormatter.FACTORY;
  42         };
  43     }
  44
  45     @Override
  46     @SuppressWarnings("checkstyle:IllegalCatch")
  47     public final void onNotification(final DOMNotification notification) {
  48         final var eventInstant = notification instanceof DOMEvent domEvent ? domEvent.getEventInstant() : Instant.now();
  49         if (!checkStartStop(eventInstant)) {
  50             return;
  51         }
  52
  53         final Optional<String> maybeOutput;
  54         try {
  55             maybeOutput = formatter().eventData(effectiveModel(), notification, eventInstant, getLeafNodesOnly(),
  56                 isSkipNotificationData(), getChangedLeafNodesOnly());
  57         } catch (Exception e) {
  58             LOG.error("Failed to process notification {}", notification, e);
  59             return;
  60         }
  61         maybeOutput.ifPresent(this::post);
  62     }
  63
  64     abstract @NonNull EffectiveModelContext effectiveModel();
  65 }