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