Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 1 | /* |
Brian O'Connor | 5ab426f | 2016-04-09 01:19:45 -0700 | [diff] [blame] | 2 | * Copyright 2015-present Open Networking Laboratory |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.store.mastership.impl; |
| 17 | |
| 18 | import static org.onlab.util.Tools.groupedThreads; |
Madan Jampani | 0f6ad14 | 2015-05-13 17:10:04 -0700 | [diff] [blame] | 19 | import static org.onosproject.mastership.MastershipEvent.Type.BACKUPS_CHANGED; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 20 | import static org.onosproject.mastership.MastershipEvent.Type.MASTER_CHANGED; |
| 21 | import static org.slf4j.LoggerFactory.getLogger; |
| 22 | import static com.google.common.base.Preconditions.checkArgument; |
| 23 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 24 | import java.util.List; |
| 25 | import java.util.Map; |
| 26 | import java.util.Set; |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 27 | import java.util.concurrent.CompletableFuture; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 28 | import java.util.concurrent.ExecutorService; |
| 29 | import java.util.concurrent.Executors; |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 30 | import java.util.concurrent.ScheduledExecutorService; |
| 31 | import java.util.concurrent.TimeUnit; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 32 | import java.util.regex.Matcher; |
| 33 | import java.util.regex.Pattern; |
| 34 | import java.util.stream.Collectors; |
| 35 | |
| 36 | import org.apache.felix.scr.annotations.Activate; |
| 37 | import org.apache.felix.scr.annotations.Component; |
| 38 | import org.apache.felix.scr.annotations.Deactivate; |
| 39 | import org.apache.felix.scr.annotations.Reference; |
| 40 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 41 | import org.apache.felix.scr.annotations.Service; |
| 42 | import org.onlab.util.KryoNamespace; |
| 43 | import org.onosproject.cluster.ClusterService; |
| 44 | import org.onosproject.cluster.Leadership; |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 45 | import org.onosproject.cluster.LeadershipAdminService; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 46 | import org.onosproject.cluster.LeadershipEvent; |
| 47 | import org.onosproject.cluster.LeadershipEventListener; |
| 48 | import org.onosproject.cluster.LeadershipService; |
| 49 | import org.onosproject.cluster.NodeId; |
| 50 | import org.onosproject.cluster.RoleInfo; |
| 51 | import org.onosproject.mastership.MastershipEvent; |
| 52 | import org.onosproject.mastership.MastershipStore; |
| 53 | import org.onosproject.mastership.MastershipStoreDelegate; |
| 54 | import org.onosproject.mastership.MastershipTerm; |
| 55 | import org.onosproject.net.DeviceId; |
| 56 | import org.onosproject.net.MastershipRole; |
| 57 | import org.onosproject.store.AbstractStore; |
| 58 | import org.onosproject.store.cluster.messaging.ClusterCommunicationService; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 59 | import org.onosproject.store.cluster.messaging.MessageSubject; |
| 60 | import org.onosproject.store.serializers.KryoNamespaces; |
| 61 | import org.onosproject.store.serializers.KryoSerializer; |
| 62 | import org.onosproject.store.serializers.StoreSerializer; |
| 63 | import org.slf4j.Logger; |
| 64 | |
| 65 | import com.google.common.base.Objects; |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 66 | import com.google.common.collect.ImmutableList; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 67 | import com.google.common.collect.Lists; |
| 68 | import com.google.common.collect.Maps; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 69 | |
| 70 | /** |
| 71 | * Implementation of the MastershipStore on top of Leadership Service. |
| 72 | */ |
Madan Jampani | 5756c35 | 2015-04-29 00:23:58 -0700 | [diff] [blame] | 73 | @Component(immediate = true, enabled = true) |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 74 | @Service |
| 75 | public class ConsistentDeviceMastershipStore |
| 76 | extends AbstractStore<MastershipEvent, MastershipStoreDelegate> |
| 77 | implements MastershipStore { |
| 78 | |
| 79 | private final Logger log = getLogger(getClass()); |
| 80 | |
| 81 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 82 | protected LeadershipService leadershipService; |
| 83 | |
| 84 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 85 | protected LeadershipAdminService leadershipAdminService; |
| 86 | |
| 87 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 88 | protected ClusterService clusterService; |
| 89 | |
| 90 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 91 | protected ClusterCommunicationService clusterCommunicator; |
| 92 | |
| 93 | private NodeId localNodeId; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 94 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 95 | private static final MessageSubject ROLE_RELINQUISH_SUBJECT = |
| 96 | new MessageSubject("mastership-store-device-role-relinquish"); |
| 97 | |
| 98 | private static final Pattern DEVICE_MASTERSHIP_TOPIC_PATTERN = |
Madan Jampani | 5756c35 | 2015-04-29 00:23:58 -0700 | [diff] [blame] | 99 | Pattern.compile("device:(.*)"); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 100 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 101 | private ExecutorService messageHandlingExecutor; |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 102 | private ScheduledExecutorService transferExecutor; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 103 | private final LeadershipEventListener leadershipEventListener = |
| 104 | new InternalDeviceMastershipEventListener(); |
| 105 | |
| 106 | private static final String NODE_ID_NULL = "Node ID cannot be null"; |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 107 | private static final String DEVICE_ID_NULL = "Device ID cannot be null"; |
| 108 | private static final int WAIT_BEFORE_MASTERSHIP_HANDOFF_MILLIS = 3000; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 109 | |
| 110 | public static final StoreSerializer SERIALIZER = new KryoSerializer() { |
| 111 | @Override |
| 112 | protected void setupKryoPool() { |
| 113 | serializerPool = KryoNamespace.newBuilder() |
| 114 | .register(KryoNamespaces.API) |
| 115 | .register(MastershipRole.class) |
| 116 | .register(MastershipEvent.class) |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 117 | .register(MastershipEvent.Type.class) |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 118 | .build(); |
| 119 | } |
| 120 | }; |
| 121 | |
| 122 | @Activate |
| 123 | public void activate() { |
| 124 | messageHandlingExecutor = |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 125 | Executors.newSingleThreadExecutor( |
HIGUCHI Yuta | 060da9a | 2016-03-11 19:16:35 -0800 | [diff] [blame] | 126 | groupedThreads("onos/store/device/mastership", "message-handler", log)); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 127 | transferExecutor = |
| 128 | Executors.newSingleThreadScheduledExecutor( |
HIGUCHI Yuta | 060da9a | 2016-03-11 19:16:35 -0800 | [diff] [blame] | 129 | groupedThreads("onos/store/device/mastership", "mastership-transfer-executor", log)); |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 130 | clusterCommunicator.addSubscriber(ROLE_RELINQUISH_SUBJECT, |
Madan Jampani | d46e18f | 2015-05-04 23:19:33 -0700 | [diff] [blame] | 131 | SERIALIZER::decode, |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 132 | this::relinquishLocalRole, |
Madan Jampani | d46e18f | 2015-05-04 23:19:33 -0700 | [diff] [blame] | 133 | SERIALIZER::encode, |
| 134 | messageHandlingExecutor); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 135 | localNodeId = clusterService.getLocalNode().id(); |
| 136 | leadershipService.addListener(leadershipEventListener); |
| 137 | |
Madan Jampani | afeebbd | 2015-05-19 15:26:01 -0700 | [diff] [blame] | 138 | log.info("Started"); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 139 | } |
| 140 | |
| 141 | @Deactivate |
| 142 | public void deactivate() { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 143 | clusterCommunicator.removeSubscriber(ROLE_RELINQUISH_SUBJECT); |
| 144 | messageHandlingExecutor.shutdown(); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 145 | transferExecutor.shutdown(); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 146 | leadershipService.removeListener(leadershipEventListener); |
| 147 | |
Madan Jampani | afeebbd | 2015-05-19 15:26:01 -0700 | [diff] [blame] | 148 | log.info("Stopped"); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 149 | } |
| 150 | |
| 151 | @Override |
Madan Jampani | de003d9 | 2015-05-11 17:14:20 -0700 | [diff] [blame] | 152 | public CompletableFuture<MastershipRole> requestRole(DeviceId deviceId) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 153 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 154 | |
| 155 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 156 | Leadership leadership = leadershipService.runForLeadership(leadershipTopic); |
| 157 | return CompletableFuture.completedFuture(localNodeId.equals(leadership.leaderNodeId()) |
| 158 | ? MastershipRole.MASTER : MastershipRole.STANDBY); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 159 | } |
| 160 | |
| 161 | @Override |
| 162 | public MastershipRole getRole(NodeId nodeId, DeviceId deviceId) { |
| 163 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 164 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 165 | |
| 166 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 167 | Leadership leadership = leadershipService.getLeadership(leadershipTopic); |
| 168 | NodeId leader = leadership == null ? null : leadership.leaderNodeId(); |
| 169 | List<NodeId> candidates = leadership == null ? |
| 170 | ImmutableList.of() : ImmutableList.copyOf(leadership.candidates()); |
| 171 | return Objects.equal(nodeId, leader) ? |
| 172 | MastershipRole.MASTER : candidates.contains(nodeId) ? MastershipRole.STANDBY : MastershipRole.NONE; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 173 | } |
| 174 | |
| 175 | @Override |
| 176 | public NodeId getMaster(DeviceId deviceId) { |
| 177 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 178 | |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 179 | return leadershipService.getLeader(createDeviceMastershipTopic(deviceId)); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 180 | } |
| 181 | |
| 182 | @Override |
| 183 | public RoleInfo getNodes(DeviceId deviceId) { |
| 184 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 185 | |
| 186 | Map<NodeId, MastershipRole> roles = Maps.newHashMap(); |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 187 | clusterService.getNodes() |
| 188 | .forEach((node) -> roles.put(node.id(), getRole(node.id(), deviceId))); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 189 | |
| 190 | NodeId master = null; |
| 191 | final List<NodeId> standbys = Lists.newLinkedList(); |
| 192 | |
Madan Jampani | 86940d9 | 2015-05-06 11:47:57 -0700 | [diff] [blame] | 193 | List<NodeId> candidates = leadershipService.getCandidates(createDeviceMastershipTopic(deviceId)); |
| 194 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 195 | for (Map.Entry<NodeId, MastershipRole> entry : roles.entrySet()) { |
| 196 | if (entry.getValue() == MastershipRole.MASTER) { |
| 197 | master = entry.getKey(); |
| 198 | } else if (entry.getValue() == MastershipRole.STANDBY) { |
| 199 | standbys.add(entry.getKey()); |
| 200 | } |
| 201 | } |
| 202 | |
Madan Jampani | 86940d9 | 2015-05-06 11:47:57 -0700 | [diff] [blame] | 203 | List<NodeId> sortedStandbyList = candidates.stream().filter(standbys::contains).collect(Collectors.toList()); |
| 204 | |
| 205 | return new RoleInfo(master, sortedStandbyList); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 206 | } |
| 207 | |
| 208 | @Override |
| 209 | public Set<DeviceId> getDevices(NodeId nodeId) { |
| 210 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 211 | |
| 212 | return leadershipService |
| 213 | .ownedTopics(nodeId) |
| 214 | .stream() |
| 215 | .filter(this::isDeviceMastershipTopic) |
| 216 | .map(this::extractDeviceIdFromTopic) |
| 217 | .collect(Collectors.toSet()); |
| 218 | } |
| 219 | |
| 220 | @Override |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 221 | public CompletableFuture<MastershipEvent> setMaster(NodeId nodeId, DeviceId deviceId) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 222 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 223 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 224 | |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 225 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
| 226 | if (leadershipAdminService.promoteToTopOfCandidateList(leadershipTopic, nodeId)) { |
| 227 | transferExecutor.schedule(() -> leadershipAdminService.transferLeadership(leadershipTopic, nodeId), |
| 228 | WAIT_BEFORE_MASTERSHIP_HANDOFF_MILLIS, TimeUnit.MILLISECONDS); |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 229 | } |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 230 | return CompletableFuture.completedFuture(null); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 231 | } |
| 232 | |
| 233 | @Override |
| 234 | public MastershipTerm getTermFor(DeviceId deviceId) { |
| 235 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 236 | |
| 237 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
| 238 | Leadership leadership = leadershipService.getLeadership(leadershipTopic); |
Madan Jampani | dbe8a81 | 2016-01-31 21:10:46 -0800 | [diff] [blame] | 239 | return leadership != null && leadership.leaderNodeId() != null ? |
| 240 | MastershipTerm.of(leadership.leaderNodeId(), leadership.leader().term()) : null; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | @Override |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 244 | public CompletableFuture<MastershipEvent> setStandby(NodeId nodeId, DeviceId deviceId) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 245 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 246 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 247 | |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 248 | NodeId currentMaster = getMaster(deviceId); |
| 249 | if (!nodeId.equals(currentMaster)) { |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 250 | return CompletableFuture.completedFuture(null); |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 251 | } |
Madan Jampani | d46e18f | 2015-05-04 23:19:33 -0700 | [diff] [blame] | 252 | |
| 253 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
| 254 | List<NodeId> candidates = leadershipService.getCandidates(leadershipTopic); |
| 255 | |
| 256 | NodeId newMaster = candidates.stream() |
| 257 | .filter(candidate -> !Objects.equal(nodeId, candidate)) |
| 258 | .findFirst() |
| 259 | .orElse(null); |
| 260 | log.info("Transitioning to role {} for {}. Next master: {}", |
| 261 | newMaster != null ? MastershipRole.STANDBY : MastershipRole.NONE, deviceId, newMaster); |
| 262 | |
| 263 | if (newMaster != null) { |
| 264 | return setMaster(newMaster, deviceId); |
| 265 | } |
| 266 | return relinquishRole(nodeId, deviceId); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 267 | } |
| 268 | |
| 269 | @Override |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 270 | public CompletableFuture<MastershipEvent> relinquishRole(NodeId nodeId, DeviceId deviceId) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 271 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 272 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 273 | |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 274 | if (nodeId.equals(localNodeId)) { |
| 275 | return relinquishLocalRole(deviceId); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 276 | } |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 277 | |
| 278 | log.debug("Forwarding request to relinquish " |
| 279 | + "role for device {} to {}", deviceId, nodeId); |
| 280 | return clusterCommunicator.sendAndReceive( |
| 281 | deviceId, |
| 282 | ROLE_RELINQUISH_SUBJECT, |
| 283 | SERIALIZER::encode, |
| 284 | SERIALIZER::decode, |
| 285 | nodeId); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 286 | } |
| 287 | |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 288 | private CompletableFuture<MastershipEvent> relinquishLocalRole(DeviceId deviceId) { |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 289 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 290 | |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 291 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
| 292 | if (!leadershipService.getCandidates(leadershipTopic).contains(localNodeId)) { |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 293 | return CompletableFuture.completedFuture(null); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 294 | } |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 295 | MastershipEvent.Type eventType = localNodeId.equals(leadershipService.getLeader(leadershipTopic)) ? |
| 296 | MastershipEvent.Type.MASTER_CHANGED : MastershipEvent.Type.BACKUPS_CHANGED; |
| 297 | leadershipService.withdraw(leadershipTopic); |
| 298 | return CompletableFuture.completedFuture(new MastershipEvent(eventType, deviceId, getNodes(deviceId))); |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 299 | } |
| 300 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 301 | @Override |
| 302 | public void relinquishAllRole(NodeId nodeId) { |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 303 | // Noop. LeadershipService already takes care of detecting and purging stale locks. |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 304 | } |
| 305 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 306 | private class InternalDeviceMastershipEventListener implements LeadershipEventListener { |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 307 | |
| 308 | @Override |
| 309 | public boolean isRelevant(LeadershipEvent event) { |
| 310 | Leadership leadership = event.subject(); |
| 311 | return isDeviceMastershipTopic(leadership.topic()); |
| 312 | } |
| 313 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 314 | @Override |
| 315 | public void event(LeadershipEvent event) { |
| 316 | Leadership leadership = event.subject(); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 317 | DeviceId deviceId = extractDeviceIdFromTopic(leadership.topic()); |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 318 | RoleInfo roleInfo = getNodes(deviceId); |
Thomas Vachuska | 4b839c7 | 2015-05-18 15:43:03 -0700 | [diff] [blame] | 319 | switch (event.type()) { |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 320 | case LEADER_AND_CANDIDATES_CHANGED: |
| 321 | notifyDelegate(new MastershipEvent(BACKUPS_CHANGED, deviceId, roleInfo)); |
| 322 | notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, roleInfo)); |
Thomas Vachuska | 4b839c7 | 2015-05-18 15:43:03 -0700 | [diff] [blame] | 323 | break; |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 324 | case LEADER_CHANGED: |
| 325 | notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, roleInfo)); |
Thomas Vachuska | 4b839c7 | 2015-05-18 15:43:03 -0700 | [diff] [blame] | 326 | break; |
| 327 | case CANDIDATES_CHANGED: |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 328 | notifyDelegate(new MastershipEvent(BACKUPS_CHANGED, deviceId, roleInfo)); |
Thomas Vachuska | 4b839c7 | 2015-05-18 15:43:03 -0700 | [diff] [blame] | 329 | break; |
| 330 | default: |
| 331 | return; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 332 | } |
| 333 | } |
| 334 | } |
| 335 | |
| 336 | private String createDeviceMastershipTopic(DeviceId deviceId) { |
Madan Jampani | 5756c35 | 2015-04-29 00:23:58 -0700 | [diff] [blame] | 337 | return String.format("device:%s", deviceId.toString()); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 338 | } |
| 339 | |
| 340 | private DeviceId extractDeviceIdFromTopic(String topic) { |
| 341 | Matcher m = DEVICE_MASTERSHIP_TOPIC_PATTERN.matcher(topic); |
| 342 | if (m.matches()) { |
| 343 | return DeviceId.deviceId(m.group(1)); |
| 344 | } else { |
| 345 | throw new IllegalArgumentException("Invalid device mastership topic: " + topic); |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | private boolean isDeviceMastershipTopic(String topic) { |
| 350 | Matcher m = DEVICE_MASTERSHIP_TOPIC_PATTERN.matcher(topic); |
| 351 | return m.matches(); |
| 352 | } |
Madan Jampani | dbe8a81 | 2016-01-31 21:10:46 -0800 | [diff] [blame] | 353 | } |