+++ /dev/null
-/*
- * 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.controller.cluster.entityownership;
-
-import static java.util.Objects.requireNonNull;
-import static org.opendaylight.controller.cluster.entityownership.EntityOwnersModel.CANDIDATE_NAME_QNAME;
-import static org.opendaylight.controller.cluster.entityownership.EntityOwnersModel.ENTITY_ID_QNAME;
-import static org.opendaylight.controller.cluster.entityownership.EntityOwnersModel.ENTITY_OWNERS_PATH;
-import static org.opendaylight.controller.cluster.entityownership.EntityOwnersModel.ENTITY_QNAME;
-
-import akka.actor.ActorRef;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.LinkedHashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Optional;
-import org.opendaylight.controller.cluster.datastore.ShardDataTree;
-import org.opendaylight.controller.cluster.entityownership.messages.CandidateAdded;
-import org.opendaylight.controller.cluster.entityownership.messages.CandidateRemoved;
-import org.opendaylight.mdsal.dom.api.DOMDataTreeChangeListener;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.clustering.entity.owners.rev150804.entity.owners.EntityType;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.clustering.entity.owners.rev150804.entity.owners.entity.type.entity.Candidate;
-import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
-import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
-import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.ModificationType;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-/**
- * Listens for candidate entries added/removed and notifies the EntityOwnershipShard appropriately.
- *
- * @author Moiz Raja
- * @author Thomas Pantelis
- */
-class CandidateListChangeListener implements DOMDataTreeChangeListener {
- private static final Logger LOG = LoggerFactory.getLogger(CandidateListChangeListener.class);
-
- private final String logId;
- private final ActorRef shard;
- private final Map<YangInstanceIdentifier, Collection<String>> currentCandidates = new HashMap<>();
-
- CandidateListChangeListener(final ActorRef shard, final String logId) {
- this.shard = requireNonNull(shard, "shard should not be null");
- this.logId = logId;
- }
-
- void init(final ShardDataTree shardDataTree) {
- shardDataTree.registerTreeChangeListener(YangInstanceIdentifier.builder(ENTITY_OWNERS_PATH)
- .node(EntityType.QNAME).node(EntityType.QNAME).node(ENTITY_QNAME).node(ENTITY_QNAME)
- .node(Candidate.QNAME).node(Candidate.QNAME).build(), this, Optional.empty(), noop -> { /* NOOP */ });
- }
-
- @Override
- public void onInitialData() {
- // No-op
- }
-
- @Override
- public void onDataTreeChanged(final Collection<DataTreeCandidate> changes) {
- for (DataTreeCandidate change: changes) {
- DataTreeCandidateNode changeRoot = change.getRootNode();
- ModificationType type = changeRoot.getModificationType();
-
- LOG.debug("{}: Candidate node changed: {}, {}", logId, type, change.getRootPath());
-
- NodeIdentifierWithPredicates candidateKey =
- (NodeIdentifierWithPredicates) change.getRootPath().getLastPathArgument();
- String candidate = candidateKey.getValue(CANDIDATE_NAME_QNAME).toString();
-
- YangInstanceIdentifier entityId = extractEntityPath(change.getRootPath());
-
- if (type == ModificationType.WRITE || type == ModificationType.APPEARED) {
- LOG.debug("{}: Candidate {} was added for entity {}", logId, candidate, entityId);
-
- Collection<String> newCandidates = addToCurrentCandidates(entityId, candidate);
- shard.tell(new CandidateAdded(entityId, candidate, new ArrayList<>(newCandidates)), shard);
- } else if (type == ModificationType.DELETE || type == ModificationType.DISAPPEARED) {
- LOG.debug("{}: Candidate {} was removed for entity {}", logId, candidate, entityId);
-
- Collection<String> newCandidates = removeFromCurrentCandidates(entityId, candidate);
- shard.tell(new CandidateRemoved(entityId, candidate, new ArrayList<>(newCandidates)), shard);
- }
- }
- }
-
- private Collection<String> addToCurrentCandidates(final YangInstanceIdentifier entityId,
- final String newCandidate) {
- Collection<String> candidates = currentCandidates.computeIfAbsent(entityId, k -> new LinkedHashSet<>());
- candidates.add(newCandidate);
- return candidates;
- }
-
- private Collection<String> removeFromCurrentCandidates(final YangInstanceIdentifier entityId,
- final String candidateToRemove) {
- Collection<String> candidates = currentCandidates.get(entityId);
- if (candidates != null) {
- candidates.remove(candidateToRemove);
- return candidates;
- }
-
- // Shouldn't happen
- return Collections.emptyList();
- }
-
- private static YangInstanceIdentifier extractEntityPath(final YangInstanceIdentifier candidatePath) {
- List<PathArgument> newPathArgs = new ArrayList<>();
- for (PathArgument pathArg: candidatePath.getPathArguments()) {
- newPathArgs.add(pathArg);
- if (pathArg instanceof NodeIdentifierWithPredicates
- && ENTITY_ID_QNAME.equals(((NodeIdentifierWithPredicates) pathArg).keySet().iterator().next())) {
- break;
- }
- }
-
- return YangInstanceIdentifier.create(newPathArgs);
- }
-}
Code Review / controller.git / blobdiff