opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/sal/dom/broker/impl/NotificationRouterImpl.java

   1 /*
   2  * Copyright (c) 2013 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.controller.sal.dom.broker.impl;
   9
  10 import java.util.Collection;
  11 import java.util.Collections;
  12 import java.util.HashSet;
  13 import java.util.Map;
  14 import java.util.Map.Entry;
  15 import java.util.Set;
  16
  17 import org.opendaylight.controller.sal.core.api.BrokerService;
  18 import org.opendaylight.controller.sal.core.api.Broker.ConsumerSession;
  19 import org.opendaylight.controller.sal.core.api.Broker.ProviderSession;
  20 import org.opendaylight.controller.sal.core.api.Consumer.ConsumerFunctionality;
  21 import org.opendaylight.controller.sal.core.api.Provider.ProviderFunctionality;
  22 import org.opendaylight.controller.sal.core.api.notify.NotificationListener;
  23 import org.opendaylight.controller.sal.core.api.notify.NotificationPublishService;
  24 import org.opendaylight.controller.sal.core.api.notify.NotificationService;
  25 import org.opendaylight.controller.sal.core.spi.BrokerModule;
  26 import org.opendaylight.controller.sal.dom.broker.spi.NotificationRouter;
  27 import org.opendaylight.yangtools.concepts.AbstractObjectRegistration;
  28 import org.opendaylight.yangtools.concepts.Registration;
  29 import org.opendaylight.yangtools.yang.common.QName;
  30 import org.opendaylight.yangtools.yang.data.api.CompositeNode;
  31 import org.slf4j.Logger;
  32 import org.slf4j.LoggerFactory;
  33
  34 import com.google.common.collect.HashMultimap;
  35 import com.google.common.collect.ImmutableSet;
  36 import com.google.common.collect.Multimap;
  37 import com.google.common.collect.Multimaps;
  38
  39 public class NotificationRouterImpl implements NotificationRouter {
  40     private static Logger log = LoggerFactory.getLogger(NotificationRouterImpl.class);
  41
  42     private Multimap<QName, Registration<NotificationListener>> listeners = Multimaps.synchronizedSetMultimap(HashMultimap.<QName, Registration<NotificationListener>>create());
  43
  44     private void sendNotification(CompositeNode notification) {
  45         QName type = notification.getNodeType();
  46         Collection<Registration<NotificationListener>> toNotify = listeners.get(type);
  47         log.trace("Publishing notification " + type);
  48
  49         if (toNotify == null) {
  50             // No listeners were registered - returns.
  51             return;
  52         }
  53
  54         for (Registration<NotificationListener> listener : toNotify) {
  55             try {
  56                 // FIXME: ensure that notification is immutable
  57                 listener.getInstance().onNotification(notification);
  58             } catch (Exception e) {
  59                 log.error("Uncaught exception in NotificationListener", e);
  60             }
  61         }
  62
  63     }
  64
  65     @Override
  66     public void publish(CompositeNode notification) {
  67         sendNotification(notification);
  68     }
  69
  70     @Override
  71     public Registration<NotificationListener> addNotificationListener(QName notification, NotificationListener listener) {
  72         ListenerRegistration ret = new ListenerRegistration(notification, listener);
  73         return ret;
  74     }
  75
  76     private class ListenerRegistration extends AbstractObjectRegistration<NotificationListener> {
  77
  78         final QName type;
  79
  80         public ListenerRegistration(QName type, NotificationListener instance) {
  81             super(instance);
  82             this.type = type;
  83         }
  84
  85         @Override
  86         protected void removeRegistration() {
  87             listeners.remove(type, this);
  88         }
  89     }
  90 }