2 * Copyright (c) 2015 Brocade Communications Systems, Inc. and others. All rights reserved.
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
8 package org.opendaylight.controller.cluster.datastore.entityownership;
10 import static org.opendaylight.controller.cluster.datastore.entityownership.EntityOwnersModel.createEntity;
11 import com.google.common.base.Objects;
12 import com.google.common.base.Optional;
13 import java.util.Collection;
14 import org.opendaylight.controller.md.sal.common.api.clustering.Entity;
15 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
16 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
17 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
18 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
19 import org.slf4j.Logger;
20 import org.slf4j.LoggerFactory;
23 * Listens for entity owner changes and notifies the EntityOwnershipListenerSupport appropriately.
25 * @author Thomas Pantelis
27 class EntityOwnerChangeListener extends AbstractEntityOwnerChangeListener {
28 private static final Logger LOG = LoggerFactory.getLogger(EntityOwnerChangeListener.class);
30 private final String localMemberName;
31 private final EntityOwnershipListenerSupport listenerSupport;
33 EntityOwnerChangeListener(String localMemberName, EntityOwnershipListenerSupport listenerSupport) {
34 this.localMemberName = localMemberName;
35 this.listenerSupport = listenerSupport;
39 public void onDataTreeChanged(Collection<DataTreeCandidate> changes) {
40 for(DataTreeCandidate change: changes) {
41 DataTreeCandidateNode changeRoot = change.getRootNode();
42 LeafNode<?> ownerLeaf = (LeafNode<?>) changeRoot.getDataAfter().get();
44 LOG.debug("{}: Entity node changed: {}, {}", logId(), changeRoot.getModificationType(), change.getRootPath());
46 String newOwner = extractOwner(ownerLeaf);
48 String origOwner = null;
49 Optional<NormalizedNode<?, ?>> dataBefore = changeRoot.getDataBefore();
50 if(dataBefore.isPresent()) {
51 origOwner = extractOwner((LeafNode<?>) changeRoot.getDataBefore().get());
54 LOG.debug("{}: New owner: {}, Original owner: {}", logId(), newOwner, origOwner);
56 if(!Objects.equal(origOwner, newOwner)) {
57 boolean isOwner = Objects.equal(localMemberName, newOwner);
58 boolean wasOwner = Objects.equal(localMemberName, origOwner);
59 boolean hasOwner = newOwner != null && !newOwner.toString().isEmpty();
61 Entity entity = createEntity(change.getRootPath());
63 LOG.debug("{}: Calling notifyEntityOwnershipListeners: entity: {}, wasOwner: {}, isOwner: {}, hasOwner: {}",
64 logId(), entity, wasOwner, isOwner, hasOwner);
66 listenerSupport.notifyEntityOwnershipListeners(entity, wasOwner, isOwner, hasOwner);
71 private String logId() {
72 return listenerSupport.getLogId();