Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 1 | /* |
Brian O'Connor | a09fe5b | 2017-08-03 21:12:30 -0700 | [diff] [blame] | 2 | * Copyright 2015-present Open Networking Foundation |
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; |
Jon Hall | 7a8bfc6 | 2016-05-26 17:59:04 -0700 | [diff] [blame] | 21 | import static org.onosproject.mastership.MastershipEvent.Type.SUSPENDED; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 22 | import static org.slf4j.LoggerFactory.getLogger; |
| 23 | import static com.google.common.base.Preconditions.checkArgument; |
| 24 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 25 | import java.util.List; |
| 26 | import java.util.Map; |
| 27 | import java.util.Set; |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 28 | import java.util.concurrent.CompletableFuture; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 29 | import java.util.concurrent.ExecutorService; |
| 30 | import java.util.concurrent.Executors; |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 31 | import java.util.concurrent.ScheduledExecutorService; |
| 32 | import java.util.concurrent.TimeUnit; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 33 | import java.util.regex.Matcher; |
| 34 | import java.util.regex.Pattern; |
| 35 | import java.util.stream.Collectors; |
| 36 | |
| 37 | import org.apache.felix.scr.annotations.Activate; |
| 38 | import org.apache.felix.scr.annotations.Component; |
| 39 | import org.apache.felix.scr.annotations.Deactivate; |
| 40 | import org.apache.felix.scr.annotations.Reference; |
| 41 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 42 | import org.apache.felix.scr.annotations.Service; |
| 43 | import org.onlab.util.KryoNamespace; |
| 44 | import org.onosproject.cluster.ClusterService; |
| 45 | import org.onosproject.cluster.Leadership; |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 46 | import org.onosproject.cluster.LeadershipAdminService; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 47 | import org.onosproject.cluster.LeadershipEvent; |
| 48 | import org.onosproject.cluster.LeadershipEventListener; |
| 49 | import org.onosproject.cluster.LeadershipService; |
| 50 | import org.onosproject.cluster.NodeId; |
| 51 | import org.onosproject.cluster.RoleInfo; |
| 52 | import org.onosproject.mastership.MastershipEvent; |
| 53 | import org.onosproject.mastership.MastershipStore; |
| 54 | import org.onosproject.mastership.MastershipStoreDelegate; |
| 55 | import org.onosproject.mastership.MastershipTerm; |
| 56 | import org.onosproject.net.DeviceId; |
| 57 | import org.onosproject.net.MastershipRole; |
| 58 | import org.onosproject.store.AbstractStore; |
| 59 | import org.onosproject.store.cluster.messaging.ClusterCommunicationService; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 60 | import org.onosproject.store.cluster.messaging.MessageSubject; |
| 61 | import org.onosproject.store.serializers.KryoNamespaces; |
Jordan Halterman | 2c83a10 | 2017-08-20 17:11:41 -0700 | [diff] [blame] | 62 | import org.onosproject.store.service.Serializer; |
Jordan Halterman | 980a8c1 | 2017-09-22 18:01:19 -0700 | [diff] [blame] | 63 | import org.onosproject.upgrade.UpgradeService; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 64 | import org.slf4j.Logger; |
| 65 | |
| 66 | import com.google.common.base.Objects; |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 67 | import com.google.common.collect.ImmutableList; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 68 | import com.google.common.collect.Lists; |
| 69 | import com.google.common.collect.Maps; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 70 | |
| 71 | /** |
| 72 | * Implementation of the MastershipStore on top of Leadership Service. |
| 73 | */ |
Sho SHIMIZU | 5c396e3 | 2016-08-12 15:19:12 -0700 | [diff] [blame] | 74 | @Component(immediate = true) |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 75 | @Service |
| 76 | public class ConsistentDeviceMastershipStore |
| 77 | extends AbstractStore<MastershipEvent, MastershipStoreDelegate> |
| 78 | implements MastershipStore { |
| 79 | |
| 80 | private final Logger log = getLogger(getClass()); |
| 81 | |
| 82 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 83 | protected LeadershipService leadershipService; |
| 84 | |
| 85 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 86 | protected LeadershipAdminService leadershipAdminService; |
| 87 | |
| 88 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 89 | protected ClusterService clusterService; |
| 90 | |
| 91 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 92 | protected ClusterCommunicationService clusterCommunicator; |
| 93 | |
Jordan Halterman | 980a8c1 | 2017-09-22 18:01:19 -0700 | [diff] [blame] | 94 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 95 | protected UpgradeService upgradeService; |
| 96 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 97 | private NodeId localNodeId; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 98 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 99 | private static final MessageSubject ROLE_RELINQUISH_SUBJECT = |
| 100 | new MessageSubject("mastership-store-device-role-relinquish"); |
| 101 | |
| 102 | private static final Pattern DEVICE_MASTERSHIP_TOPIC_PATTERN = |
Madan Jampani | 5756c35 | 2015-04-29 00:23:58 -0700 | [diff] [blame] | 103 | Pattern.compile("device:(.*)"); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 104 | |
Madan Jampani | 71c32ca | 2016-06-22 08:23:18 -0700 | [diff] [blame] | 105 | private ExecutorService eventHandler; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 106 | private ExecutorService messageHandlingExecutor; |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 107 | private ScheduledExecutorService transferExecutor; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 108 | private final LeadershipEventListener leadershipEventListener = |
| 109 | new InternalDeviceMastershipEventListener(); |
| 110 | |
| 111 | private static final String NODE_ID_NULL = "Node ID cannot be null"; |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 112 | private static final String DEVICE_ID_NULL = "Device ID cannot be null"; |
| 113 | private static final int WAIT_BEFORE_MASTERSHIP_HANDOFF_MILLIS = 3000; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 114 | |
Jordan Halterman | 2c83a10 | 2017-08-20 17:11:41 -0700 | [diff] [blame] | 115 | public static final Serializer SERIALIZER = Serializer.using( |
HIGUCHI Yuta | e729065 | 2016-05-18 11:29:01 -0700 | [diff] [blame] | 116 | KryoNamespace.newBuilder() |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 117 | .register(KryoNamespaces.API) |
| 118 | .register(MastershipRole.class) |
| 119 | .register(MastershipEvent.class) |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 120 | .register(MastershipEvent.Type.class) |
HIGUCHI Yuta | e729065 | 2016-05-18 11:29:01 -0700 | [diff] [blame] | 121 | .build("MastershipStore")); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 122 | |
| 123 | @Activate |
| 124 | public void activate() { |
Madan Jampani | 71c32ca | 2016-06-22 08:23:18 -0700 | [diff] [blame] | 125 | |
| 126 | eventHandler = Executors.newSingleThreadExecutor( |
| 127 | groupedThreads("onos/store/device/mastership", "event-handler", log)); |
| 128 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 129 | messageHandlingExecutor = |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 130 | Executors.newSingleThreadExecutor( |
HIGUCHI Yuta | 060da9a | 2016-03-11 19:16:35 -0800 | [diff] [blame] | 131 | groupedThreads("onos/store/device/mastership", "message-handler", log)); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 132 | transferExecutor = |
| 133 | Executors.newSingleThreadScheduledExecutor( |
HIGUCHI Yuta | 060da9a | 2016-03-11 19:16:35 -0800 | [diff] [blame] | 134 | groupedThreads("onos/store/device/mastership", "mastership-transfer-executor", log)); |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 135 | clusterCommunicator.addSubscriber(ROLE_RELINQUISH_SUBJECT, |
Madan Jampani | d46e18f | 2015-05-04 23:19:33 -0700 | [diff] [blame] | 136 | SERIALIZER::decode, |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 137 | this::relinquishLocalRole, |
Madan Jampani | d46e18f | 2015-05-04 23:19:33 -0700 | [diff] [blame] | 138 | SERIALIZER::encode, |
| 139 | messageHandlingExecutor); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 140 | localNodeId = clusterService.getLocalNode().id(); |
| 141 | leadershipService.addListener(leadershipEventListener); |
| 142 | |
Madan Jampani | afeebbd | 2015-05-19 15:26:01 -0700 | [diff] [blame] | 143 | log.info("Started"); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | @Deactivate |
| 147 | public void deactivate() { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 148 | clusterCommunicator.removeSubscriber(ROLE_RELINQUISH_SUBJECT); |
Madan Jampani | 71c32ca | 2016-06-22 08:23:18 -0700 | [diff] [blame] | 149 | leadershipService.removeListener(leadershipEventListener); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 150 | messageHandlingExecutor.shutdown(); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 151 | transferExecutor.shutdown(); |
Madan Jampani | 71c32ca | 2016-06-22 08:23:18 -0700 | [diff] [blame] | 152 | eventHandler.shutdown(); |
Madan Jampani | afeebbd | 2015-05-19 15:26:01 -0700 | [diff] [blame] | 153 | log.info("Stopped"); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | @Override |
Madan Jampani | de003d9 | 2015-05-11 17:14:20 -0700 | [diff] [blame] | 157 | public CompletableFuture<MastershipRole> requestRole(DeviceId deviceId) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 158 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 159 | |
| 160 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 161 | Leadership leadership = leadershipService.runForLeadership(leadershipTopic); |
Jordan Halterman | 980a8c1 | 2017-09-22 18:01:19 -0700 | [diff] [blame] | 162 | NodeId leader = leadership == null ? null : leadership.leaderNodeId(); |
| 163 | List<NodeId> candidates = leadership == null ? |
| 164 | ImmutableList.of() : ImmutableList.copyOf(leadership.candidates()); |
| 165 | MastershipRole role = Objects.equal(localNodeId, leader) ? |
| 166 | MastershipRole.MASTER : candidates.contains(localNodeId) ? MastershipRole.STANDBY : MastershipRole.NONE; |
| 167 | return CompletableFuture.completedFuture(role); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | @Override |
| 171 | public MastershipRole getRole(NodeId nodeId, DeviceId deviceId) { |
| 172 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 173 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 174 | |
| 175 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 176 | Leadership leadership = leadershipService.getLeadership(leadershipTopic); |
| 177 | NodeId leader = leadership == null ? null : leadership.leaderNodeId(); |
| 178 | List<NodeId> candidates = leadership == null ? |
| 179 | ImmutableList.of() : ImmutableList.copyOf(leadership.candidates()); |
| 180 | return Objects.equal(nodeId, leader) ? |
| 181 | MastershipRole.MASTER : candidates.contains(nodeId) ? MastershipRole.STANDBY : MastershipRole.NONE; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 182 | } |
| 183 | |
| 184 | @Override |
| 185 | public NodeId getMaster(DeviceId deviceId) { |
| 186 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 187 | |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 188 | return leadershipService.getLeader(createDeviceMastershipTopic(deviceId)); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 189 | } |
| 190 | |
| 191 | @Override |
| 192 | public RoleInfo getNodes(DeviceId deviceId) { |
| 193 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 194 | |
| 195 | Map<NodeId, MastershipRole> roles = Maps.newHashMap(); |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 196 | clusterService.getNodes() |
| 197 | .forEach((node) -> roles.put(node.id(), getRole(node.id(), deviceId))); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 198 | |
| 199 | NodeId master = null; |
| 200 | final List<NodeId> standbys = Lists.newLinkedList(); |
| 201 | |
Madan Jampani | 86940d9 | 2015-05-06 11:47:57 -0700 | [diff] [blame] | 202 | List<NodeId> candidates = leadershipService.getCandidates(createDeviceMastershipTopic(deviceId)); |
| 203 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 204 | for (Map.Entry<NodeId, MastershipRole> entry : roles.entrySet()) { |
| 205 | if (entry.getValue() == MastershipRole.MASTER) { |
| 206 | master = entry.getKey(); |
| 207 | } else if (entry.getValue() == MastershipRole.STANDBY) { |
| 208 | standbys.add(entry.getKey()); |
| 209 | } |
| 210 | } |
| 211 | |
Madan Jampani | 86940d9 | 2015-05-06 11:47:57 -0700 | [diff] [blame] | 212 | List<NodeId> sortedStandbyList = candidates.stream().filter(standbys::contains).collect(Collectors.toList()); |
| 213 | |
| 214 | return new RoleInfo(master, sortedStandbyList); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | @Override |
| 218 | public Set<DeviceId> getDevices(NodeId nodeId) { |
| 219 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 220 | |
Yuta HIGUCHI | d934003 | 2017-01-25 09:25:44 -0800 | [diff] [blame] | 221 | // FIXME This result contains REMOVED device. |
| 222 | // MastershipService cannot listen to DeviceEvent to GC removed topic, |
| 223 | // since DeviceManager depend on it. |
| 224 | // Reference count, etc. at LeadershipService layer? |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 225 | return leadershipService |
| 226 | .ownedTopics(nodeId) |
| 227 | .stream() |
| 228 | .filter(this::isDeviceMastershipTopic) |
| 229 | .map(this::extractDeviceIdFromTopic) |
| 230 | .collect(Collectors.toSet()); |
| 231 | } |
| 232 | |
| 233 | @Override |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 234 | public CompletableFuture<MastershipEvent> setMaster(NodeId nodeId, DeviceId deviceId) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 235 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 236 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 237 | |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 238 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
| 239 | if (leadershipAdminService.promoteToTopOfCandidateList(leadershipTopic, nodeId)) { |
| 240 | transferExecutor.schedule(() -> leadershipAdminService.transferLeadership(leadershipTopic, nodeId), |
| 241 | WAIT_BEFORE_MASTERSHIP_HANDOFF_MILLIS, TimeUnit.MILLISECONDS); |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 242 | } |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 243 | return CompletableFuture.completedFuture(null); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 244 | } |
| 245 | |
| 246 | @Override |
| 247 | public MastershipTerm getTermFor(DeviceId deviceId) { |
| 248 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 249 | |
| 250 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
| 251 | Leadership leadership = leadershipService.getLeadership(leadershipTopic); |
Madan Jampani | dbe8a81 | 2016-01-31 21:10:46 -0800 | [diff] [blame] | 252 | return leadership != null && leadership.leaderNodeId() != null ? |
| 253 | MastershipTerm.of(leadership.leaderNodeId(), leadership.leader().term()) : null; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | @Override |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 257 | public CompletableFuture<MastershipEvent> setStandby(NodeId nodeId, DeviceId deviceId) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 258 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 259 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 260 | |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 261 | NodeId currentMaster = getMaster(deviceId); |
| 262 | if (!nodeId.equals(currentMaster)) { |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 263 | return CompletableFuture.completedFuture(null); |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 264 | } |
Madan Jampani | d46e18f | 2015-05-04 23:19:33 -0700 | [diff] [blame] | 265 | |
| 266 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
| 267 | List<NodeId> candidates = leadershipService.getCandidates(leadershipTopic); |
| 268 | |
| 269 | NodeId newMaster = candidates.stream() |
| 270 | .filter(candidate -> !Objects.equal(nodeId, candidate)) |
| 271 | .findFirst() |
| 272 | .orElse(null); |
| 273 | log.info("Transitioning to role {} for {}. Next master: {}", |
| 274 | newMaster != null ? MastershipRole.STANDBY : MastershipRole.NONE, deviceId, newMaster); |
| 275 | |
| 276 | if (newMaster != null) { |
| 277 | return setMaster(newMaster, deviceId); |
| 278 | } |
| 279 | return relinquishRole(nodeId, deviceId); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 280 | } |
| 281 | |
| 282 | @Override |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 283 | public CompletableFuture<MastershipEvent> relinquishRole(NodeId nodeId, DeviceId deviceId) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 284 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 285 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 286 | |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 287 | if (nodeId.equals(localNodeId)) { |
| 288 | return relinquishLocalRole(deviceId); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 289 | } |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 290 | |
| 291 | log.debug("Forwarding request to relinquish " |
| 292 | + "role for device {} to {}", deviceId, nodeId); |
| 293 | return clusterCommunicator.sendAndReceive( |
| 294 | deviceId, |
| 295 | ROLE_RELINQUISH_SUBJECT, |
| 296 | SERIALIZER::encode, |
| 297 | SERIALIZER::decode, |
| 298 | nodeId); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 299 | } |
| 300 | |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 301 | private CompletableFuture<MastershipEvent> relinquishLocalRole(DeviceId deviceId) { |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 302 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 303 | |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 304 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
| 305 | if (!leadershipService.getCandidates(leadershipTopic).contains(localNodeId)) { |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 306 | return CompletableFuture.completedFuture(null); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 307 | } |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 308 | MastershipEvent.Type eventType = localNodeId.equals(leadershipService.getLeader(leadershipTopic)) ? |
| 309 | MastershipEvent.Type.MASTER_CHANGED : MastershipEvent.Type.BACKUPS_CHANGED; |
| 310 | leadershipService.withdraw(leadershipTopic); |
| 311 | return CompletableFuture.completedFuture(new MastershipEvent(eventType, deviceId, getNodes(deviceId))); |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 312 | } |
| 313 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 314 | @Override |
| 315 | public void relinquishAllRole(NodeId nodeId) { |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 316 | // Noop. LeadershipService already takes care of detecting and purging stale locks. |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 317 | } |
| 318 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 319 | private class InternalDeviceMastershipEventListener implements LeadershipEventListener { |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 320 | |
| 321 | @Override |
| 322 | public boolean isRelevant(LeadershipEvent event) { |
| 323 | Leadership leadership = event.subject(); |
| 324 | return isDeviceMastershipTopic(leadership.topic()); |
| 325 | } |
| 326 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 327 | @Override |
| 328 | public void event(LeadershipEvent event) { |
Madan Jampani | 71c32ca | 2016-06-22 08:23:18 -0700 | [diff] [blame] | 329 | eventHandler.execute(() -> handleEvent(event)); |
| 330 | } |
| 331 | |
| 332 | private void handleEvent(LeadershipEvent event) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 333 | Leadership leadership = event.subject(); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 334 | DeviceId deviceId = extractDeviceIdFromTopic(leadership.topic()); |
Jon Hall | 7a8bfc6 | 2016-05-26 17:59:04 -0700 | [diff] [blame] | 335 | RoleInfo roleInfo = event.type() != LeadershipEvent.Type.SERVICE_DISRUPTED ? |
| 336 | getNodes(deviceId) : new RoleInfo(); |
Thomas Vachuska | 4b839c7 | 2015-05-18 15:43:03 -0700 | [diff] [blame] | 337 | switch (event.type()) { |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 338 | case LEADER_AND_CANDIDATES_CHANGED: |
| 339 | notifyDelegate(new MastershipEvent(BACKUPS_CHANGED, deviceId, roleInfo)); |
| 340 | notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, roleInfo)); |
Thomas Vachuska | 4b839c7 | 2015-05-18 15:43:03 -0700 | [diff] [blame] | 341 | break; |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 342 | case LEADER_CHANGED: |
| 343 | notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, roleInfo)); |
Thomas Vachuska | 4b839c7 | 2015-05-18 15:43:03 -0700 | [diff] [blame] | 344 | break; |
| 345 | case CANDIDATES_CHANGED: |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 346 | notifyDelegate(new MastershipEvent(BACKUPS_CHANGED, deviceId, roleInfo)); |
Thomas Vachuska | 4b839c7 | 2015-05-18 15:43:03 -0700 | [diff] [blame] | 347 | break; |
Jon Hall | 7a8bfc6 | 2016-05-26 17:59:04 -0700 | [diff] [blame] | 348 | case SERVICE_DISRUPTED: |
| 349 | notifyDelegate(new MastershipEvent(SUSPENDED, deviceId, roleInfo)); |
| 350 | break; |
| 351 | case SERVICE_RESTORED: |
| 352 | // Do nothing, wait for updates from peers |
| 353 | break; |
Thomas Vachuska | 4b839c7 | 2015-05-18 15:43:03 -0700 | [diff] [blame] | 354 | default: |
| 355 | return; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 356 | } |
| 357 | } |
| 358 | } |
| 359 | |
| 360 | private String createDeviceMastershipTopic(DeviceId deviceId) { |
Madan Jampani | 5756c35 | 2015-04-29 00:23:58 -0700 | [diff] [blame] | 361 | return String.format("device:%s", deviceId.toString()); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 362 | } |
| 363 | |
| 364 | private DeviceId extractDeviceIdFromTopic(String topic) { |
| 365 | Matcher m = DEVICE_MASTERSHIP_TOPIC_PATTERN.matcher(topic); |
| 366 | if (m.matches()) { |
| 367 | return DeviceId.deviceId(m.group(1)); |
| 368 | } else { |
| 369 | throw new IllegalArgumentException("Invalid device mastership topic: " + topic); |
| 370 | } |
| 371 | } |
| 372 | |
| 373 | private boolean isDeviceMastershipTopic(String topic) { |
| 374 | Matcher m = DEVICE_MASTERSHIP_TOPIC_PATTERN.matcher(topic); |
| 375 | return m.matches(); |
| 376 | } |
Madan Jampani | dbe8a81 | 2016-01-31 21:10:46 -0800 | [diff] [blame] | 377 | } |