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

   1 /*
   2  * Copyright (c) 2016 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.restconf.nb.rfc8040.streams;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.base.MoreObjects.ToStringHelper;
  13 import com.google.common.collect.ImmutableSet;
  14 import org.opendaylight.mdsal.dom.api.DOMNotification;
  15 import org.opendaylight.mdsal.dom.api.DOMNotificationService;
  16 import org.opendaylight.restconf.nb.rfc8040.databind.DatabindProvider;
  17 import org.opendaylight.restconf.nb.rfc8040.streams.RestconfStream.Sink;
  18 import org.opendaylight.restconf.nb.rfc8040.streams.RestconfStream.Source;
  19 import org.opendaylight.yangtools.concepts.Registration;
  20 import org.opendaylight.yangtools.yang.common.QName;
  21 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Absolute;
  22
  23 /**
  24  * A {@link Source} reporting YANG notifications.
  25  */
  26 public final class NotificationSource extends AbstractNotificationSource {
  27     private final DatabindProvider databindProvider;
  28     private final DOMNotificationService notificationService;
  29     private final ImmutableSet<QName> qnames;
  30
  31     NotificationSource(final DatabindProvider databindProvider, final DOMNotificationService notificationService,
  32             final ImmutableSet<QName> qnames) {
  33         this.databindProvider = requireNonNull(databindProvider);
  34         this.notificationService = requireNonNull(notificationService);
  35         this.qnames = requireNonNull(qnames);
  36     }
  37
  38     /**
  39      * Return notification QNames.
  40      *
  41      * @return The YANG notification {@link QName}s this listener is bound to
  42      */
  43     public ImmutableSet<QName> qnames() {
  44         return qnames;
  45     }
  46
  47     @Override
  48     protected Registration start(final Sink<DOMNotification> sink) {
  49         return notificationService.registerNotificationListener(
  50             new Listener(sink, () -> databindProvider.currentContext().modelContext()),
  51             qnames.stream().map(Absolute::of).toList());
  52     }
  53
  54     @Override
  55     protected ToStringHelper addToStringAttributes(final ToStringHelper helper) {
  56         return super.addToStringAttributes(helper.add("qnames", qnames));
  57     }
  58 }