opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/md/sal/binding/impl/ForwardedNotificationService.java

   1 /*
   2  * Copyright (c) 2015 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.md.sal.binding.impl;
   9
  10 import java.util.ArrayList;
  11 import java.util.Collection;
  12 import java.util.List;
  13 import java.util.Set;
  14 import javax.annotation.Nonnull;
  15 import org.opendaylight.controller.md.sal.binding.api.NotificationService;
  16 import org.opendaylight.controller.md.sal.dom.api.DOMNotification;
  17 import org.opendaylight.controller.md.sal.dom.api.DOMNotificationListener;
  18 import org.opendaylight.controller.md.sal.dom.api.DOMNotificationService;
  19 import org.opendaylight.controller.sal.binding.spi.NotificationInvokerFactory;
  20 import org.opendaylight.yangtools.binding.data.codec.api.BindingNormalizedNodeSerializer;
  21 import org.opendaylight.yangtools.concepts.AbstractListenerRegistration;
  22 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  23 import org.opendaylight.yangtools.yang.binding.Notification;
  24 import org.opendaylight.yangtools.yang.binding.NotificationListener;
  25 import org.opendaylight.yangtools.yang.binding.util.BindingReflections;
  26 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  27
  28 public class ForwardedNotificationService implements NotificationService, AutoCloseable {
  29
  30     private final BindingNormalizedNodeSerializer codec;
  31     private final DOMNotificationService domNotifService;
  32     private final NotificationInvokerFactory notificationInvokerFactory;
  33
  34     public ForwardedNotificationService(BindingNormalizedNodeSerializer codec, DOMNotificationService domNotifService, NotificationInvokerFactory notificationInvokerFactory) {
  35         this.codec = codec;
  36         this.domNotifService = domNotifService;
  37         this.notificationInvokerFactory = notificationInvokerFactory;
  38     }
  39
  40     @Override
  41     public <T extends NotificationListener> ListenerRegistration<T> registerNotificationListener(T listener) {
  42         final NotificationInvokerFactory.NotificationInvoker invoker = notificationInvokerFactory.invokerFor(listener);
  43         final DOMNotificationListener domListener = new NotificationInvokerImpl(invoker);
  44         final Collection<SchemaPath> schemaPaths = convertNotifTypesToSchemaPath(invoker.getSupportedNotifications());
  45         final ListenerRegistration<DOMNotificationListener> domRegistration =
  46                 domNotifService.registerNotificationListener(domListener, schemaPaths);
  47         return new ListenerRegistrationImpl<>(listener, domRegistration);
  48     }
  49
  50
  51
  52     private Collection<SchemaPath> convertNotifTypesToSchemaPath(Set<Class<? extends Notification>> notificationTypes) {
  53         final List<SchemaPath> schemaPaths = new ArrayList<>();
  54         for (Class<? extends Notification> notificationType : notificationTypes) {
  55             schemaPaths.add(SchemaPath.create(true, BindingReflections.findQName(notificationType)));
  56         }
  57         return schemaPaths;
  58     }
  59
  60     @Override
  61     public void close() throws Exception {
  62
  63     }
  64
  65     private static class ListenerRegistrationImpl<T extends NotificationListener> extends AbstractListenerRegistration<T> {
  66         private final ListenerRegistration<?> listenerRegistration;
  67
  68         public ListenerRegistrationImpl(T listener, ListenerRegistration<?> listenerRegistration) {
  69             super(listener);
  70             this.listenerRegistration = listenerRegistration;
  71         }
  72
  73         @Override
  74         protected void removeRegistration() {
  75             listenerRegistration.close();
  76         }
  77     }
  78
  79     private class NotificationInvokerImpl implements DOMNotificationListener {
  80         private final NotificationInvokerFactory.NotificationInvoker invoker;
  81
  82         public NotificationInvokerImpl(NotificationInvokerFactory.NotificationInvoker invoker) {
  83             this.invoker = invoker;
  84         }
  85
  86         @Override
  87         public void onNotification(@Nonnull DOMNotification notification) {
  88             final Notification baNotification =
  89                     codec.fromNormalizedNodeNotification(notification.getType(), notification.getBody());
  90             invoker.getInvocationProxy().onNotification(baNotification);
  91
  92         }
  93     }
  94
  95 }