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.Optional;
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 org.opendaylight.controller.cluster.access.concepts.MemberName;
18 import org.opendaylight.controller.md.sal.common.api.clustering.Entity;
19 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
20 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
21 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
22 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
23 import org.slf4j.Logger;
24 import org.slf4j.LoggerFactory;
27 * Listens for entity owner changes and notifies the EntityOwnershipListenerSupport appropriately.
29 * @author Thomas Pantelis
31 class EntityOwnerChangeListener extends AbstractEntityOwnerChangeListener {
32 private static final Logger LOG = LoggerFactory.getLogger(EntityOwnerChangeListener.class);
34 private final String localMemberName;
35 private final EntityOwnershipListenerSupport listenerSupport;
37 EntityOwnerChangeListener(final MemberName localMemberName, final EntityOwnershipListenerSupport listenerSupport) {
38 this.localMemberName = Verify.verifyNotNull(localMemberName.getName());
39 this.listenerSupport = Preconditions.checkNotNull(listenerSupport);
43 public void onDataTreeChanged(final Collection<DataTreeCandidate> changes) {
44 for(DataTreeCandidate change: changes) {
45 DataTreeCandidateNode changeRoot = change.getRootNode();
46 LeafNode<?> ownerLeaf = (LeafNode<?>) changeRoot.getDataAfter().get();
48 LOG.debug("{}: Entity node changed: {}, {}", logId(), changeRoot.getModificationType(), change.getRootPath());
50 String newOwner = extractOwner(ownerLeaf);
52 String origOwner = null;
53 Optional<NormalizedNode<?, ?>> dataBefore = changeRoot.getDataBefore();
54 if(dataBefore.isPresent()) {
55 origOwner = extractOwner((LeafNode<?>) changeRoot.getDataBefore().get());
58 LOG.debug("{}: New owner: {}, Original owner: {}", logId(), newOwner, origOwner);
60 if (!Objects.equals(origOwner, newOwner)) {
61 boolean isOwner = localMemberName.equals(newOwner);
62 boolean wasOwner = localMemberName.equals(origOwner);
63 boolean hasOwner = !Strings.isNullOrEmpty(newOwner);
65 Entity entity = createEntity(change.getRootPath());
67 LOG.debug("{}: Calling notifyEntityOwnershipListeners: entity: {}, wasOwner: {}, isOwner: {}, hasOwner: {}",
68 logId(), entity, wasOwner, isOwner, hasOwner);
70 listenerSupport.notifyEntityOwnershipListeners(entity, wasOwner, isOwner, hasOwner);
75 private String logId() {
76 return listenerSupport.getLogId();