applications/notification-supplier/src/main/java/org/opendaylight/openflowplugin/applications/notification/supplier/impl/AbstractNotificationSupplierForItemRoot.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;
  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.NotificationSupplierForItemRoot;
  21 import org.opendaylight.yangtools.yang.binding.DataObject;
  22 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  23 import org.opendaylight.yangtools.yang.binding.Notification;
  24
  25 /**
  26  * Class is package protected abstract implementation for all Root Items
  27  * Notification Suppliers
  28  *
  29  * @param <O> - data tree item Object
  30  * @param <C> - Create notification
  31  * @param <D> - Delete notification
  32  */
  33 abstract class AbstractNotificationSupplierForItemRoot<O extends DataObject,
  34                                                C extends Notification,
  35                                                D extends Notification>
  36                     extends AbstractNotificationSupplierBase<O>
  37                     implements NotificationSupplierForItemRoot<O, C, D> {
  38
  39     private final NotificationProviderService notificationProviderService;
  40
  41     /**
  42      * Default constructor for all Root Item Notification Supplier implementation
  43      *
  44      * @param notificationProviderService - notification publisher
  45      * @param db - DataBroker for DataChangeEvent registration
  46      * @param clazz - Statistics Notification Class
  47      */
  48     public AbstractNotificationSupplierForItemRoot(final NotificationProviderService notificationProviderService, final DataBroker db,
  49             final Class<O> clazz) {
  50         super(db, clazz);
  51         this.notificationProviderService = Preconditions.checkNotNull(notificationProviderService);
  52     }
  53
  54     @Override
  55     public void onDataTreeChanged(Collection<DataTreeModification<O>> changes) {
  56
  57         Preconditions.checkNotNull(changes, "Changes may not be null!");
  58
  59         for (DataTreeModification<O> change : changes) {
  60             final InstanceIdentifier<O> key = change.getRootPath().getRootIdentifier();
  61             final DataObjectModification<O> mod = change.getRootNode();
  62             switch (mod.getModificationType()) {
  63                 case DELETE:
  64                     remove(key, mod.getDataBefore());
  65                     break;
  66                 case SUBTREE_MODIFIED:
  67                     update(key, mod.getDataBefore(), mod.getDataAfter());
  68                     break;
  69                 case WRITE:
  70                     if (mod.getDataBefore() == null) {
  71                         add(key, mod.getDataAfter());
  72                     } else {
  73                         update(key, mod.getDataBefore(), mod.getDataAfter());
  74                     }
  75                     break;
  76                 default:
  77                     throw new IllegalArgumentException("Unhandled modification type " + mod.getModificationType());
  78             }
  79         }
  80     }
  81
  82
  83     public void add(InstanceIdentifier<O> identifier , O add ){
  84
  85         final C notif = createNotification(add, identifier);
  86         if (notif != null) {
  87             notificationProviderService.publish(notif);
  88         }
  89     }
  90
  91     public void remove(InstanceIdentifier<O> identifier , O del){
  92         final D notif = deleteNotification(identifier.firstIdentifierOf(clazz));
  93         if (notif != null) {
  94             notificationProviderService.publish(notif);
  95         }
  96     }
  97
  98     public void update(InstanceIdentifier<O> identifier , O before, O after){
  99         //EMPTY NO-OP
 100     }
 101
 102 }
 103