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;
12 import com.google.common.base.Preconditions;
13 import com.google.common.base.Strings;
14 import com.google.common.base.Verify;
15 import java.util.Collection;
16 import java.util.Objects;
17 import java.util.Optional;
18 import org.opendaylight.controller.cluster.access.concepts.MemberName;
19 import org.opendaylight.mdsal.eos.dom.api.DOMEntity;
20 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
21 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
22 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
23 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
24 import org.slf4j.Logger;
25 import org.slf4j.LoggerFactory;
28 * Listens for entity owner changes and notifies the EntityOwnershipListenerSupport appropriately.
30 * @author Thomas Pantelis
32 class EntityOwnerChangeListener extends AbstractEntityOwnerChangeListener {
33 private static final Logger LOG = LoggerFactory.getLogger(EntityOwnerChangeListener.class);
35 private final String localMemberName;
36 private final EntityOwnershipChangePublisher publisher;
38 EntityOwnerChangeListener(final MemberName localMemberName, final EntityOwnershipChangePublisher publisher) {
39 this.localMemberName = Verify.verifyNotNull(localMemberName.getName());
40 this.publisher = Preconditions.checkNotNull(publisher);
44 public void onDataTreeChanged(final Collection<DataTreeCandidate> changes) {
45 for (DataTreeCandidate change: changes) {
46 DataTreeCandidateNode changeRoot = change.getRootNode();
47 LeafNode<?> ownerLeaf = (LeafNode<?>) changeRoot.getDataAfter().get();
49 LOG.debug("{}: Entity node changed: {}, {}", logId(), changeRoot.getModificationType(),
50 change.getRootPath());
52 String newOwner = extractOwner(ownerLeaf);
54 String origOwner = null;
55 Optional<NormalizedNode<?, ?>> dataBefore = changeRoot.getDataBefore();
56 if (dataBefore.isPresent()) {
57 origOwner = extractOwner((LeafNode<?>) changeRoot.getDataBefore().get());
60 LOG.debug("{}: New owner: {}, Original owner: {}", logId(), newOwner, origOwner);
62 if (!Objects.equals(origOwner, newOwner)) {
63 boolean isOwner = localMemberName.equals(newOwner);
64 boolean wasOwner = localMemberName.equals(origOwner);
65 boolean hasOwner = !Strings.isNullOrEmpty(newOwner);
67 DOMEntity entity = createEntity(change.getRootPath());
70 "{}: Calling notifyEntityOwnershipListeners: entity: {}, wasOwner: {}, isOwner: {}, hasOwner: {}",
71 logId(), entity, wasOwner, isOwner, hasOwner);
73 publisher.notifyEntityOwnershipListeners(entity, wasOwner, isOwner, hasOwner);
78 private String logId() {
79 return publisher.getLogId();