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; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 61 | import org.onosproject.store.serializers.StoreSerializer; |
| 62 | import org.slf4j.Logger; |
| 63 | |
| 64 | import com.google.common.base.Objects; |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 65 | import com.google.common.collect.ImmutableList; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 66 | import com.google.common.collect.Lists; |
| 67 | import com.google.common.collect.Maps; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 68 | |
| 69 | /** |
| 70 | * Implementation of the MastershipStore on top of Leadership Service. |
| 71 | */ |
Madan Jampani | 5756c35 | 2015-04-29 00:23:58 -0700 | [diff] [blame] | 72 | @Component(immediate = true, enabled = true) |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 73 | @Service |
| 74 | public class ConsistentDeviceMastershipStore |
| 75 | extends AbstractStore<MastershipEvent, MastershipStoreDelegate> |
| 76 | implements MastershipStore { |
| 77 | |
| 78 | private final Logger log = getLogger(getClass()); |
| 79 | |
| 80 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 81 | protected LeadershipService leadershipService; |
| 82 | |
| 83 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 84 | protected LeadershipAdminService leadershipAdminService; |
| 85 | |
| 86 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 87 | protected ClusterService clusterService; |
| 88 | |
| 89 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 90 | protected ClusterCommunicationService clusterCommunicator; |
| 91 | |
| 92 | private NodeId localNodeId; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 93 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 94 | private static final MessageSubject ROLE_RELINQUISH_SUBJECT = |
| 95 | new MessageSubject("mastership-store-device-role-relinquish"); |
| 96 | |
| 97 | private static final Pattern DEVICE_MASTERSHIP_TOPIC_PATTERN = |
Madan Jampani | 5756c35 | 2015-04-29 00:23:58 -0700 | [diff] [blame] | 98 | Pattern.compile("device:(.*)"); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 99 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 100 | private ExecutorService messageHandlingExecutor; |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 101 | private ScheduledExecutorService transferExecutor; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 102 | private final LeadershipEventListener leadershipEventListener = |
| 103 | new InternalDeviceMastershipEventListener(); |
| 104 | |
| 105 | private static final String NODE_ID_NULL = "Node ID cannot be null"; |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 106 | private static final String DEVICE_ID_NULL = "Device ID cannot be null"; |
| 107 | private static final int WAIT_BEFORE_MASTERSHIP_HANDOFF_MILLIS = 3000; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 108 | |
HIGUCHI Yuta | e729065 | 2016-05-18 11:29:01 -0700 | [diff] [blame^] | 109 | public static final StoreSerializer SERIALIZER = StoreSerializer.using( |
| 110 | KryoNamespace.newBuilder() |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 111 | .register(KryoNamespaces.API) |
| 112 | .register(MastershipRole.class) |
| 113 | .register(MastershipEvent.class) |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 114 | .register(MastershipEvent.Type.class) |
HIGUCHI Yuta | e729065 | 2016-05-18 11:29:01 -0700 | [diff] [blame^] | 115 | .build("MastershipStore")); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 116 | |
| 117 | @Activate |
| 118 | public void activate() { |
| 119 | messageHandlingExecutor = |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 120 | Executors.newSingleThreadExecutor( |
HIGUCHI Yuta | 060da9a | 2016-03-11 19:16:35 -0800 | [diff] [blame] | 121 | groupedThreads("onos/store/device/mastership", "message-handler", log)); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 122 | transferExecutor = |
| 123 | Executors.newSingleThreadScheduledExecutor( |
HIGUCHI Yuta | 060da9a | 2016-03-11 19:16:35 -0800 | [diff] [blame] | 124 | groupedThreads("onos/store/device/mastership", "mastership-transfer-executor", log)); |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 125 | clusterCommunicator.addSubscriber(ROLE_RELINQUISH_SUBJECT, |
Madan Jampani | d46e18f | 2015-05-04 23:19:33 -0700 | [diff] [blame] | 126 | SERIALIZER::decode, |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 127 | this::relinquishLocalRole, |
Madan Jampani | d46e18f | 2015-05-04 23:19:33 -0700 | [diff] [blame] | 128 | SERIALIZER::encode, |
| 129 | messageHandlingExecutor); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 130 | localNodeId = clusterService.getLocalNode().id(); |
| 131 | leadershipService.addListener(leadershipEventListener); |
| 132 | |
Madan Jampani | afeebbd | 2015-05-19 15:26:01 -0700 | [diff] [blame] | 133 | log.info("Started"); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | @Deactivate |
| 137 | public void deactivate() { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 138 | clusterCommunicator.removeSubscriber(ROLE_RELINQUISH_SUBJECT); |
| 139 | messageHandlingExecutor.shutdown(); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 140 | transferExecutor.shutdown(); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 141 | leadershipService.removeListener(leadershipEventListener); |
| 142 | |
Madan Jampani | afeebbd | 2015-05-19 15:26:01 -0700 | [diff] [blame] | 143 | log.info("Stopped"); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | @Override |
Madan Jampani | de003d9 | 2015-05-11 17:14:20 -0700 | [diff] [blame] | 147 | public CompletableFuture<MastershipRole> requestRole(DeviceId deviceId) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 148 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 149 | |
| 150 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 151 | Leadership leadership = leadershipService.runForLeadership(leadershipTopic); |
| 152 | return CompletableFuture.completedFuture(localNodeId.equals(leadership.leaderNodeId()) |
| 153 | ? MastershipRole.MASTER : MastershipRole.STANDBY); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | @Override |
| 157 | public MastershipRole getRole(NodeId nodeId, DeviceId deviceId) { |
| 158 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 159 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 160 | |
| 161 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 162 | Leadership leadership = leadershipService.getLeadership(leadershipTopic); |
| 163 | NodeId leader = leadership == null ? null : leadership.leaderNodeId(); |
| 164 | List<NodeId> candidates = leadership == null ? |
| 165 | ImmutableList.of() : ImmutableList.copyOf(leadership.candidates()); |
| 166 | return Objects.equal(nodeId, leader) ? |
| 167 | MastershipRole.MASTER : candidates.contains(nodeId) ? MastershipRole.STANDBY : MastershipRole.NONE; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | @Override |
| 171 | public NodeId getMaster(DeviceId deviceId) { |
| 172 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 173 | |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 174 | return leadershipService.getLeader(createDeviceMastershipTopic(deviceId)); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 175 | } |
| 176 | |
| 177 | @Override |
| 178 | public RoleInfo getNodes(DeviceId deviceId) { |
| 179 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 180 | |
| 181 | Map<NodeId, MastershipRole> roles = Maps.newHashMap(); |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 182 | clusterService.getNodes() |
| 183 | .forEach((node) -> roles.put(node.id(), getRole(node.id(), deviceId))); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 184 | |
| 185 | NodeId master = null; |
| 186 | final List<NodeId> standbys = Lists.newLinkedList(); |
| 187 | |
Madan Jampani | 86940d9 | 2015-05-06 11:47:57 -0700 | [diff] [blame] | 188 | List<NodeId> candidates = leadershipService.getCandidates(createDeviceMastershipTopic(deviceId)); |
| 189 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 190 | for (Map.Entry<NodeId, MastershipRole> entry : roles.entrySet()) { |
| 191 | if (entry.getValue() == MastershipRole.MASTER) { |
| 192 | master = entry.getKey(); |
| 193 | } else if (entry.getValue() == MastershipRole.STANDBY) { |
| 194 | standbys.add(entry.getKey()); |
| 195 | } |
| 196 | } |
| 197 | |
Madan Jampani | 86940d9 | 2015-05-06 11:47:57 -0700 | [diff] [blame] | 198 | List<NodeId> sortedStandbyList = candidates.stream().filter(standbys::contains).collect(Collectors.toList()); |
| 199 | |
| 200 | return new RoleInfo(master, sortedStandbyList); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 201 | } |
| 202 | |
| 203 | @Override |
| 204 | public Set<DeviceId> getDevices(NodeId nodeId) { |
| 205 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 206 | |
| 207 | return leadershipService |
| 208 | .ownedTopics(nodeId) |
| 209 | .stream() |
| 210 | .filter(this::isDeviceMastershipTopic) |
| 211 | .map(this::extractDeviceIdFromTopic) |
| 212 | .collect(Collectors.toSet()); |
| 213 | } |
| 214 | |
| 215 | @Override |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 216 | public CompletableFuture<MastershipEvent> setMaster(NodeId nodeId, DeviceId deviceId) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 217 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 218 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 219 | |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 220 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
| 221 | if (leadershipAdminService.promoteToTopOfCandidateList(leadershipTopic, nodeId)) { |
| 222 | transferExecutor.schedule(() -> leadershipAdminService.transferLeadership(leadershipTopic, nodeId), |
| 223 | WAIT_BEFORE_MASTERSHIP_HANDOFF_MILLIS, TimeUnit.MILLISECONDS); |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 224 | } |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 225 | return CompletableFuture.completedFuture(null); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 226 | } |
| 227 | |
| 228 | @Override |
| 229 | public MastershipTerm getTermFor(DeviceId deviceId) { |
| 230 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 231 | |
| 232 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
| 233 | Leadership leadership = leadershipService.getLeadership(leadershipTopic); |
Madan Jampani | dbe8a81 | 2016-01-31 21:10:46 -0800 | [diff] [blame] | 234 | return leadership != null && leadership.leaderNodeId() != null ? |
| 235 | MastershipTerm.of(leadership.leaderNodeId(), leadership.leader().term()) : null; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 236 | } |
| 237 | |
| 238 | @Override |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 239 | public CompletableFuture<MastershipEvent> setStandby(NodeId nodeId, DeviceId deviceId) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 240 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 241 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 242 | |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 243 | NodeId currentMaster = getMaster(deviceId); |
| 244 | if (!nodeId.equals(currentMaster)) { |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 245 | return CompletableFuture.completedFuture(null); |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 246 | } |
Madan Jampani | d46e18f | 2015-05-04 23:19:33 -0700 | [diff] [blame] | 247 | |
| 248 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
| 249 | List<NodeId> candidates = leadershipService.getCandidates(leadershipTopic); |
| 250 | |
| 251 | NodeId newMaster = candidates.stream() |
| 252 | .filter(candidate -> !Objects.equal(nodeId, candidate)) |
| 253 | .findFirst() |
| 254 | .orElse(null); |
| 255 | log.info("Transitioning to role {} for {}. Next master: {}", |
| 256 | newMaster != null ? MastershipRole.STANDBY : MastershipRole.NONE, deviceId, newMaster); |
| 257 | |
| 258 | if (newMaster != null) { |
| 259 | return setMaster(newMaster, deviceId); |
| 260 | } |
| 261 | return relinquishRole(nodeId, deviceId); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 262 | } |
| 263 | |
| 264 | @Override |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 265 | public CompletableFuture<MastershipEvent> relinquishRole(NodeId nodeId, DeviceId deviceId) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 266 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 267 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 268 | |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 269 | if (nodeId.equals(localNodeId)) { |
| 270 | return relinquishLocalRole(deviceId); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 271 | } |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 272 | |
| 273 | log.debug("Forwarding request to relinquish " |
| 274 | + "role for device {} to {}", deviceId, nodeId); |
| 275 | return clusterCommunicator.sendAndReceive( |
| 276 | deviceId, |
| 277 | ROLE_RELINQUISH_SUBJECT, |
| 278 | SERIALIZER::encode, |
| 279 | SERIALIZER::decode, |
| 280 | nodeId); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 281 | } |
| 282 | |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 283 | private CompletableFuture<MastershipEvent> relinquishLocalRole(DeviceId deviceId) { |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 284 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 285 | |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 286 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
| 287 | if (!leadershipService.getCandidates(leadershipTopic).contains(localNodeId)) { |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 288 | return CompletableFuture.completedFuture(null); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 289 | } |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 290 | MastershipEvent.Type eventType = localNodeId.equals(leadershipService.getLeader(leadershipTopic)) ? |
| 291 | MastershipEvent.Type.MASTER_CHANGED : MastershipEvent.Type.BACKUPS_CHANGED; |
| 292 | leadershipService.withdraw(leadershipTopic); |
| 293 | return CompletableFuture.completedFuture(new MastershipEvent(eventType, deviceId, getNodes(deviceId))); |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 294 | } |
| 295 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 296 | @Override |
| 297 | public void relinquishAllRole(NodeId nodeId) { |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 298 | // Noop. LeadershipService already takes care of detecting and purging stale locks. |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 299 | } |
| 300 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 301 | private class InternalDeviceMastershipEventListener implements LeadershipEventListener { |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 302 | |
| 303 | @Override |
| 304 | public boolean isRelevant(LeadershipEvent event) { |
| 305 | Leadership leadership = event.subject(); |
| 306 | return isDeviceMastershipTopic(leadership.topic()); |
| 307 | } |
| 308 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 309 | @Override |
| 310 | public void event(LeadershipEvent event) { |
| 311 | Leadership leadership = event.subject(); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 312 | DeviceId deviceId = extractDeviceIdFromTopic(leadership.topic()); |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 313 | RoleInfo roleInfo = getNodes(deviceId); |
Thomas Vachuska | 4b839c7 | 2015-05-18 15:43:03 -0700 | [diff] [blame] | 314 | switch (event.type()) { |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 315 | case LEADER_AND_CANDIDATES_CHANGED: |
| 316 | notifyDelegate(new MastershipEvent(BACKUPS_CHANGED, deviceId, roleInfo)); |
| 317 | notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, roleInfo)); |
Thomas Vachuska | 4b839c7 | 2015-05-18 15:43:03 -0700 | [diff] [blame] | 318 | break; |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 319 | case LEADER_CHANGED: |
| 320 | notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, roleInfo)); |
Thomas Vachuska | 4b839c7 | 2015-05-18 15:43:03 -0700 | [diff] [blame] | 321 | break; |
| 322 | case CANDIDATES_CHANGED: |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 323 | notifyDelegate(new MastershipEvent(BACKUPS_CHANGED, deviceId, roleInfo)); |
Thomas Vachuska | 4b839c7 | 2015-05-18 15:43:03 -0700 | [diff] [blame] | 324 | break; |
| 325 | default: |
| 326 | return; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 327 | } |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | private String createDeviceMastershipTopic(DeviceId deviceId) { |
Madan Jampani | 5756c35 | 2015-04-29 00:23:58 -0700 | [diff] [blame] | 332 | return String.format("device:%s", deviceId.toString()); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 333 | } |
| 334 | |
| 335 | private DeviceId extractDeviceIdFromTopic(String topic) { |
| 336 | Matcher m = DEVICE_MASTERSHIP_TOPIC_PATTERN.matcher(topic); |
| 337 | if (m.matches()) { |
| 338 | return DeviceId.deviceId(m.group(1)); |
| 339 | } else { |
| 340 | throw new IllegalArgumentException("Invalid device mastership topic: " + topic); |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | private boolean isDeviceMastershipTopic(String topic) { |
| 345 | Matcher m = DEVICE_MASTERSHIP_TOPIC_PATTERN.matcher(topic); |
| 346 | return m.matches(); |
| 347 | } |
Madan Jampani | dbe8a81 | 2016-01-31 21:10:46 -0800 | [diff] [blame] | 348 | } |