applications/notification-supplier/src/main/java/org/opendaylight/openflowplugin/applications/notification/supplier/impl/item/AbstractNotificationSupplierForItem.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
   9 package org.opendaylight.openflowplugin.applications.notification.supplier.impl.item;
  10
  11 import com.google.common.base.Preconditions;
  12
  13 import java.util.Collection;
  14 import java.util.Map.Entry;
  15 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  16 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  17 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  18 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
  19 import org.opendaylight.controller.sal.binding.api.NotificationProviderService;
  20 import org.opendaylight.openflowplugin.applications.notification.supplier.NotificationSupplierForItem;
  21 import org.opendaylight.openflowplugin.applications.notification.supplier.impl.AbstractNotificationSupplierBase;
  22 import org.opendaylight.yangtools.yang.binding.DataObject;
  23 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  24 import org.opendaylight.yangtools.yang.binding.Notification;
  25
  26 /**
  27  * Class is package protected abstract implementation for all Old Root Items
  28  * Notification Suppliers
  29  *
  30  * @param <O> - data tree item Object
  31  * @param <C> - Create notification
  32  * @param <U> - Update notification
  33  * @param <D> - Delete notification
  34  */
  35 abstract class AbstractNotificationSupplierForItem<O extends DataObject,
  36                                             C extends Notification,
  37                                             U extends Notification,
  38                                             D extends Notification>
  39                     extends AbstractNotificationSupplierBase<O>
  40                     implements NotificationSupplierForItem<O, C, U, D> {
  41
  42     private final NotificationProviderService notificationProviderService;
  43
  44     /**
  45      * Default constructor for all item Notification Supplier implementation
  46      *
  47      * @param notifProviderService - notification publisher
  48      * @param db - DataBroker for DataChangeEvent registration
  49      * @param clazz - Statistics Notification Class
  50      */
  51     public AbstractNotificationSupplierForItem(final NotificationProviderService notifProviderService, final DataBroker db,
  52             final Class<O> clazz) {
  53         super(db, clazz);
  54         this.notificationProviderService = Preconditions.checkNotNull(notifProviderService);
  55     }
  56
  57     @Override
  58     public void onDataTreeChanged(Collection<DataTreeModification<O>> changes) {
  59
  60         Preconditions.checkNotNull(changes, "Changes may not be null!");
  61
  62         for (DataTreeModification<O> change : changes) {
  63             final InstanceIdentifier<O> key = change.getRootPath().getRootIdentifier();
  64             final DataObjectModification<O> mod = change.getRootNode();
  65             switch (mod.getModificationType()) {
  66                 case DELETE:
  67                     remove(key, mod.getDataBefore());
  68                     break;
  69                 case SUBTREE_MODIFIED:
  70                     update(key, mod.getDataBefore(), mod.getDataAfter());
  71                     break;
  72                 case WRITE:
  73                     if (mod.getDataBefore() == null) {
  74                         add(key, mod.getDataAfter());
  75                     } else {
  76                         update(key, mod.getDataBefore(), mod.getDataAfter());
  77                     }
  78                     break;
  79                 default:
  80                     throw new IllegalArgumentException("Unhandled modification type " + mod.getModificationType());
  81             }
  82         }
  83     }
  84
  85
  86     public void add(InstanceIdentifier<O> identifier , O add ){
  87         final C notif = createNotification(add, identifier);
  88         if (notif != null) {
  89             notificationProviderService.publish(notif);
  90         }
  91     }
  92
  93
  94     public void remove(InstanceIdentifier<O> identifier , O del){
  95         final D notif = deleteNotification(identifier.firstIdentifierOf(clazz));
  96         if (notif != null) {
  97             notificationProviderService.publish(notif);
  98         }
  99     }
 100
 101
 102     public void update(InstanceIdentifier<O> identifier , O before, O after){
 103
 104         final U notif = updateNotification(after, identifier);
 105         if (notif != null) {
 106             notificationProviderService.publish(notif);
 107         }
 108     }
 109
 110 }