2 * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
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
8 package org.opendaylight.controller.md.sal.dom.broker.impl;
10 import com.google.common.base.Preconditions;
11 import com.google.common.util.concurrent.ListenableFuture;
12 import com.google.common.util.concurrent.SettableFuture;
13 import com.lmax.disruptor.EventFactory;
14 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
15 import java.util.Collection;
16 import org.opendaylight.controller.md.sal.dom.api.DOMNotification;
17 import org.opendaylight.controller.md.sal.dom.api.DOMNotificationListener;
18 import org.opendaylight.yangtools.concepts.ListenerRegistration;
19 import org.slf4j.Logger;
20 import org.slf4j.LoggerFactory;
23 * A single notification event in the disruptor ringbuffer. These objects are reused,
24 * so they do have mutable state.
26 final class DOMNotificationRouterEvent {
27 private static final Logger LOG = LoggerFactory.getLogger(DOMNotificationRouterEvent.class);
28 public static final EventFactory<DOMNotificationRouterEvent> FACTORY = DOMNotificationRouterEvent::new;
30 private Collection<ListenerRegistration<? extends DOMNotificationListener>> subscribers;
31 private DOMNotification notification;
32 private SettableFuture<Void> future;
34 private DOMNotificationRouterEvent() {
35 // Hidden on purpose, initialized in initialize()
38 @SuppressWarnings("checkstyle:hiddenField")
39 ListenableFuture<Void> initialize(final DOMNotification notification,
40 final Collection<ListenerRegistration<? extends DOMNotificationListener>>
42 this.notification = Preconditions.checkNotNull(notification);
43 this.subscribers = Preconditions.checkNotNull(subscribers);
44 this.future = SettableFuture.create();
48 void deliverNotification() {
49 LOG.trace("Start delivery of notification {}", notification);
50 for (ListenerRegistration<? extends DOMNotificationListener> r : subscribers) {
51 final DOMNotificationListener listener = r.getInstance();
52 if (listener != null) {
53 LOG.trace("Notifying listener {}", listener);
54 listener.onNotification(notification);
55 LOG.trace("Listener notification completed");
58 LOG.trace("Delivery completed");
61 @SuppressFBWarnings(value = "NP_NONNULL_PARAM_VIOLATION", justification = "Void is the only allowed value")