2 * Copyright (c) 2013 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.sal.binding.impl;
10 import java.util.Arrays;
11 import java.util.Collections;
12 import java.util.HashSet;
14 import java.util.concurrent.ExecutorService;
16 import org.opendaylight.controller.sal.binding.api.NotificationListener;
17 import org.opendaylight.controller.sal.binding.api.NotificationProviderService;
18 import org.opendaylight.controller.sal.binding.codegen.impl.SingletonHolder;
19 import org.opendaylight.controller.sal.binding.spi.NotificationInvokerFactory.NotificationInvoker;
20 import org.opendaylight.yangtools.concepts.ListenerRegistration;
21 import org.opendaylight.yangtools.concepts.Registration;
22 import org.opendaylight.yangtools.concepts.util.ListenerRegistry;
23 import org.opendaylight.yangtools.yang.binding.Notification;
24 import org.slf4j.Logger;
25 import org.slf4j.LoggerFactory;
27 import com.google.common.base.Preconditions;
28 import com.google.common.base.Predicate;
29 import com.google.common.collect.HashMultimap;
30 import com.google.common.collect.Iterables;
31 import com.google.common.collect.Multimap;
32 import com.google.common.collect.Multimaps;
34 public class NotificationBrokerImpl implements NotificationProviderService, AutoCloseable {
35 private static final Logger LOG = LoggerFactory.getLogger(NotificationBrokerImpl.class);
37 private final ListenerRegistry<NotificationInterestListener> interestListeners =
38 ListenerRegistry.create();
40 private final Multimap<Class<? extends Notification>, NotificationListener<?>> listeners =
41 Multimaps.synchronizedSetMultimap(HashMultimap.<Class<? extends Notification>, NotificationListener<?>>create());
42 private ExecutorService executor;
45 public NotificationBrokerImpl(final ExecutorService executor) {
46 this.setExecutor(executor);
49 public void setExecutor(final ExecutorService executor) {
50 this.executor = Preconditions.checkNotNull(executor);
53 public Iterable<Class<?>> getNotificationTypes(final Notification notification) {
54 final Class<?>[] ifaces = notification.getClass().getInterfaces();
55 return Iterables.filter(Arrays.asList(ifaces), new Predicate<Class<?>>() {
57 public boolean apply(final Class<?> input) {
58 if (Notification.class.equals(input)) {
61 return Notification.class.isAssignableFrom(input);
67 public void publish(final Notification notification) {
68 this.publish(notification, executor);
72 public void publish(final Notification notification, final ExecutorService service) {
73 Iterable<NotificationListener<?>> listenerToNotify = Collections.emptySet();
74 for (final Class<?> type : getNotificationTypes(notification)) {
75 listenerToNotify = Iterables.concat(listenerToNotify, listeners.get(((Class<? extends Notification>) type)));
78 final Set<NotifyTask> tasks = new HashSet<>();
79 for (NotificationListener<?> l : listenerToNotify) {
80 tasks.add(new NotifyTask(l, notification));
83 for (final NotifyTask task : tasks) {
89 public <T extends Notification> Registration<NotificationListener<T>> registerNotificationListener(final Class<T> notificationType, final NotificationListener<T> listener) {
90 final GenericNotificationRegistration<T> reg = new GenericNotificationRegistration<T>(notificationType, listener, this);
91 this.listeners.put(notificationType, listener);
92 this.announceNotificationSubscription(notificationType);
96 private void announceNotificationSubscription(final Class<? extends Notification> notification) {
97 for (final ListenerRegistration<NotificationInterestListener> listener : interestListeners) {
99 listener.getInstance().onNotificationSubscribtion(notification);
100 } catch (Exception e) {
101 LOG.warn("Listener {} reported unexpected error on notification {}",
102 listener.getInstance(), notification, e);
108 public Registration<org.opendaylight.yangtools.yang.binding.NotificationListener> registerNotificationListener(final org.opendaylight.yangtools.yang.binding.NotificationListener listener) {
109 final NotificationInvoker invoker = SingletonHolder.INVOKER_FACTORY.invokerFor(listener);
110 for (final Class<? extends Notification> notifyType : invoker.getSupportedNotifications()) {
111 listeners.put(notifyType, invoker.getInvocationProxy());
112 announceNotificationSubscription(notifyType);
115 return new GeneratedListenerRegistration(listener, invoker, this);
118 protected boolean unregisterListener(final GenericNotificationRegistration<?> reg) {
119 return listeners.remove(reg.getType(), reg.getInstance());
122 protected void unregisterListener(final GeneratedListenerRegistration reg) {
123 final NotificationInvoker invoker = reg.getInvoker();
124 for (final Class<? extends Notification> notifyType : invoker.getSupportedNotifications()) {
125 this.listeners.remove(notifyType, invoker.getInvocationProxy());
130 public void close() {
134 public ListenerRegistration<NotificationInterestListener> registerInterestListener(final NotificationInterestListener interestListener) {
135 final ListenerRegistration<NotificationInterestListener> registration = this.interestListeners.register(interestListener);
136 for (final Class<? extends Notification> notification : listeners.keySet()) {
137 interestListener.onNotificationSubscribtion(notification);