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 akka.actor.ActorRef;
11 import akka.dispatch.OnComplete;
12 import akka.util.Timeout;
13 import com.google.common.annotations.VisibleForTesting;
14 import java.util.Collection;
15 import java.util.concurrent.ConcurrentHashMap;
16 import java.util.concurrent.ConcurrentMap;
17 import java.util.concurrent.TimeUnit;
18 import org.opendaylight.controller.cluster.datastore.DistributedDataStore;
19 import org.opendaylight.controller.cluster.datastore.config.Configuration;
20 import org.opendaylight.controller.cluster.datastore.config.ModuleShardConfiguration;
21 import org.opendaylight.controller.cluster.datastore.entityownership.messages.RegisterCandidateLocal;
22 import org.opendaylight.controller.cluster.datastore.entityownership.messages.UnregisterCandidateLocal;
23 import org.opendaylight.controller.cluster.datastore.messages.CreateShard;
24 import org.opendaylight.controller.cluster.datastore.shardstrategy.ModuleShardStrategy;
25 import org.opendaylight.controller.md.sal.common.api.clustering.CandidateAlreadyRegisteredException;
26 import org.opendaylight.controller.md.sal.common.api.clustering.Entity;
27 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipCandidate;
28 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipCandidateRegistration;
29 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipListener;
30 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipListenerRegistration;
31 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipService;
32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.clustering.entity.owners.rev150804.EntityOwners;
33 import org.slf4j.Logger;
34 import org.slf4j.LoggerFactory;
35 import scala.concurrent.Future;
38 * The distributed implementation of the EntityOwnershipService.
40 * @author Thomas Pantelis
42 public class DistributedEntityOwnershipService implements EntityOwnershipService, AutoCloseable {
43 private static final Logger LOG = LoggerFactory.getLogger(DistributedEntityOwnershipService.class);
44 static final String ENTITY_OWNERSHIP_SHARD_NAME = "entity-ownership";
45 private static final Timeout MESSAGE_TIMEOUT = new Timeout(1, TimeUnit.MINUTES);
47 private final DistributedDataStore datastore;
48 private final ConcurrentMap<Entity, EntityOwnershipCandidate> registeredEntities = new ConcurrentHashMap<>();
49 private volatile ActorRef localEntityOwnershipShard;
51 public DistributedEntityOwnershipService(DistributedDataStore datastore) {
52 this.datastore = datastore;
56 ActorRef shardManagerActor = datastore.getActorContext().getShardManager();
58 Configuration configuration = datastore.getActorContext().getConfiguration();
59 Collection<String> entityOwnersMemberNames = configuration.getUniqueMemberNamesForAllShards();
60 CreateShard createShard = new CreateShard(new ModuleShardConfiguration(EntityOwners.QNAME.getNamespace(),
61 "entity-owners", ENTITY_OWNERSHIP_SHARD_NAME, ModuleShardStrategy.NAME, entityOwnersMemberNames),
62 newShardPropsCreator(), null);
64 Future<Object> createFuture = datastore.getActorContext().executeOperationAsync(shardManagerActor,
65 createShard, MESSAGE_TIMEOUT);
67 createFuture.onComplete(new OnComplete<Object>() {
69 public void onComplete(Throwable failure, Object response) {
71 LOG.error("Failed to create {} shard", ENTITY_OWNERSHIP_SHARD_NAME);
73 LOG.info("Successfully created {} shard", ENTITY_OWNERSHIP_SHARD_NAME);
76 }, datastore.getActorContext().getClientDispatcher());
79 private void executeEntityOwnershipShardOperation(final ActorRef shardActor, final Object message) {
80 Future<Object> future = datastore.getActorContext().executeOperationAsync(shardActor, message, MESSAGE_TIMEOUT);
81 future.onComplete(new OnComplete<Object>() {
83 public void onComplete(Throwable failure, Object response) {
85 LOG.debug("Error sending message {} to {}", message, shardActor, failure);
87 LOG.debug("{} message to {} succeeded", message, shardActor, failure);
90 }, datastore.getActorContext().getClientDispatcher());
93 private void executeLocalEntityOwnershipShardOperation(final Object message) {
94 if(localEntityOwnershipShard == null) {
95 Future<ActorRef> future = datastore.getActorContext().findLocalShardAsync(ENTITY_OWNERSHIP_SHARD_NAME);
96 future.onComplete(new OnComplete<ActorRef>() {
98 public void onComplete(Throwable failure, ActorRef shardActor) {
100 LOG.error("Failed to find local {} shard", ENTITY_OWNERSHIP_SHARD_NAME, failure);
102 localEntityOwnershipShard = shardActor;
103 executeEntityOwnershipShardOperation(localEntityOwnershipShard, message);
106 }, datastore.getActorContext().getClientDispatcher());
109 executeEntityOwnershipShardOperation(localEntityOwnershipShard, message);
114 public EntityOwnershipCandidateRegistration registerCandidate(Entity entity, EntityOwnershipCandidate candidate)
115 throws CandidateAlreadyRegisteredException {
117 EntityOwnershipCandidate currentCandidate = registeredEntities.putIfAbsent(entity, candidate);
118 if(currentCandidate != null) {
119 throw new CandidateAlreadyRegisteredException(entity, currentCandidate);
122 RegisterCandidateLocal registerCandidate = new RegisterCandidateLocal(candidate, entity);
124 LOG.debug("Registering candidate with message: {}", registerCandidate);
126 executeLocalEntityOwnershipShardOperation(registerCandidate);
127 return new DistributedEntityOwnershipCandidateRegistration(candidate, entity, this);
130 void unregisterCandidate(Entity entity, EntityOwnershipCandidate entityOwnershipCandidate) {
131 LOG.debug("Unregistering candidate for {}", entity);
133 executeLocalEntityOwnershipShardOperation(new UnregisterCandidateLocal(entityOwnershipCandidate, entity));
134 registeredEntities.remove(entity);
138 public EntityOwnershipListenerRegistration registerListener(Entity entity, EntityOwnershipListener listener) {
139 // TODO Auto-generated method stub
144 public void close() {
147 protected EntityOwnershipShardPropsCreator newShardPropsCreator() {
148 return new EntityOwnershipShardPropsCreator(datastore.getActorContext().getCurrentMemberName());
152 ActorRef getLocalEntityOwnershipShard() {
153 return localEntityOwnershipShard;