/*
* Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.openflowplugin.applications.notification.supplier.impl.item.stat;
import com.google.common.base.Preconditions;
import java.util.Collection;
import org.opendaylight.controller.md.sal.binding.api.DataBroker;
import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
import org.opendaylight.controller.sal.binding.api.NotificationProviderService;
import org.opendaylight.openflowplugin.applications.notification.supplier.NotificationSupplierForItemStat;
import org.opendaylight.openflowplugin.applications.notification.supplier.impl.AbstractNotificationSupplierBase;
import org.opendaylight.yangtools.yang.binding.DataObject;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.opendaylight.yangtools.yang.binding.Notification;
/**
* Class is package protected abstract implementation for all Old Statistics
* Notification Suppliers
*
* @param <O> - Statistics {@link DataObject}
* @param <N> - Statistics Notification
*/
abstract class AbstractNotificationSupplierForItemStat<O extends DataObject,
N extends Notification>
extends AbstractNotificationSupplierBase<O>
implements NotificationSupplierForItemStat<O, N> {
private final NotificationProviderService notifProviderService;
/**
* Default constructor for all Statistic Notification Supplier implementation
*
* @param notifProviderService - notification publisher
* @param db - DataBroker for DataTreeChangeListener registration
* @param clazz - Statistics Notification Class
*/
public AbstractNotificationSupplierForItemStat(final NotificationProviderService notifProviderService,
final DataBroker db, final Class<O> clazz) {
super(db, clazz);
this.notifProviderService = Preconditions.checkNotNull(notifProviderService);
}
@Override
public void onDataTreeChanged(Collection<DataTreeModification<O>> changes) {
Preconditions.checkNotNull(changes, "Changes may not be null!");
for (DataTreeModification<O> change : changes) {
final InstanceIdentifier<O> key = change.getRootPath().getRootIdentifier();
final DataObjectModification<O> mod = change.getRootNode();
switch (mod.getModificationType()) {
case DELETE:
remove(key, mod.getDataBefore());
break;
case SUBTREE_MODIFIED:
update(key, mod.getDataBefore(), mod.getDataAfter());
break;
case WRITE:
if (mod.getDataBefore() == null) {
add(key, mod.getDataAfter());
} else {
update(key, mod.getDataBefore(), mod.getDataAfter());
}
break;
default:
throw new IllegalArgumentException("Unhandled modification type " + mod.getModificationType());
}
}
}
public void add(InstanceIdentifier<O> identifier , O add ){
final N notif = createNotification(add, identifier);
if (notif != null) {
notifProviderService.publish(notif);
}
}
public void remove(InstanceIdentifier<O> identifier , O del){
//EMPTY NO-OP
}
public void update(InstanceIdentifier<O> identifier , O before, O after){
//EMPTY NO-OP
}
}