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