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 | |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame^] | 18 | import com.google.common.collect.ImmutableList; |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 19 | import com.google.common.collect.ImmutableMap; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 20 | import org.onlab.util.KryoNamespace; |
| 21 | import org.onosproject.cluster.ClusterService; |
| 22 | import org.onosproject.cluster.Leadership; |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 23 | import org.onosproject.cluster.LeadershipAdminService; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 24 | import org.onosproject.cluster.LeadershipEvent; |
| 25 | import org.onosproject.cluster.LeadershipEventListener; |
| 26 | import org.onosproject.cluster.LeadershipService; |
| 27 | import org.onosproject.cluster.NodeId; |
| 28 | import org.onosproject.cluster.RoleInfo; |
| 29 | import org.onosproject.mastership.MastershipEvent; |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 30 | import org.onosproject.mastership.MastershipInfo; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 31 | import org.onosproject.mastership.MastershipStore; |
| 32 | import org.onosproject.mastership.MastershipStoreDelegate; |
| 33 | import org.onosproject.mastership.MastershipTerm; |
| 34 | import org.onosproject.net.DeviceId; |
| 35 | import org.onosproject.net.MastershipRole; |
| 36 | import org.onosproject.store.AbstractStore; |
| 37 | import org.onosproject.store.cluster.messaging.ClusterCommunicationService; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 38 | import org.onosproject.store.cluster.messaging.MessageSubject; |
| 39 | import org.onosproject.store.serializers.KryoNamespaces; |
Jordan Halterman | 2c83a10 | 2017-08-20 17:11:41 -0700 | [diff] [blame] | 40 | import org.onosproject.store.service.Serializer; |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame^] | 41 | import org.osgi.service.component.annotations.Activate; |
| 42 | import org.osgi.service.component.annotations.Component; |
| 43 | import org.osgi.service.component.annotations.Deactivate; |
| 44 | import org.osgi.service.component.annotations.Reference; |
| 45 | import org.osgi.service.component.annotations.ReferenceCardinality; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 46 | import org.slf4j.Logger; |
| 47 | |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame^] | 48 | import java.util.List; |
| 49 | import java.util.Objects; |
| 50 | import java.util.Optional; |
| 51 | import java.util.Set; |
| 52 | import java.util.concurrent.CompletableFuture; |
| 53 | import java.util.concurrent.ExecutorService; |
| 54 | import java.util.concurrent.Executors; |
| 55 | import java.util.concurrent.ScheduledExecutorService; |
| 56 | import java.util.concurrent.TimeUnit; |
| 57 | import java.util.regex.Matcher; |
| 58 | import java.util.regex.Pattern; |
| 59 | import java.util.stream.Collectors; |
| 60 | |
| 61 | import static com.google.common.base.Preconditions.checkArgument; |
| 62 | import static org.onlab.util.Tools.groupedThreads; |
| 63 | import static org.onosproject.mastership.MastershipEvent.Type.BACKUPS_CHANGED; |
| 64 | import static org.onosproject.mastership.MastershipEvent.Type.MASTER_CHANGED; |
| 65 | import static org.onosproject.mastership.MastershipEvent.Type.RESTORED; |
| 66 | import static org.onosproject.mastership.MastershipEvent.Type.SUSPENDED; |
| 67 | import static org.slf4j.LoggerFactory.getLogger; |
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 | */ |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame^] | 72 | @Component(immediate = true, service = MastershipStore.class) |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 73 | public class ConsistentDeviceMastershipStore |
| 74 | extends AbstractStore<MastershipEvent, MastershipStoreDelegate> |
| 75 | implements MastershipStore { |
| 76 | |
| 77 | private final Logger log = getLogger(getClass()); |
| 78 | |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame^] | 79 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 80 | protected LeadershipService leadershipService; |
| 81 | |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame^] | 82 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 83 | protected LeadershipAdminService leadershipAdminService; |
| 84 | |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame^] | 85 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 86 | protected ClusterService clusterService; |
| 87 | |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame^] | 88 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 89 | protected ClusterCommunicationService clusterCommunicator; |
| 90 | |
| 91 | private NodeId localNodeId; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 92 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 93 | private static final MessageSubject ROLE_RELINQUISH_SUBJECT = |
| 94 | new MessageSubject("mastership-store-device-role-relinquish"); |
| 95 | |
| 96 | private static final Pattern DEVICE_MASTERSHIP_TOPIC_PATTERN = |
Madan Jampani | 5756c35 | 2015-04-29 00:23:58 -0700 | [diff] [blame] | 97 | Pattern.compile("device:(.*)"); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 98 | |
Madan Jampani | 71c32ca | 2016-06-22 08:23:18 -0700 | [diff] [blame] | 99 | private ExecutorService eventHandler; |
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 | |
Jordan Halterman | 2c83a10 | 2017-08-20 17:11:41 -0700 | [diff] [blame] | 109 | public static final Serializer SERIALIZER = Serializer.using( |
HIGUCHI Yuta | e729065 | 2016-05-18 11:29:01 -0700 | [diff] [blame] | 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() { |
Madan Jampani | 71c32ca | 2016-06-22 08:23:18 -0700 | [diff] [blame] | 119 | |
| 120 | eventHandler = Executors.newSingleThreadExecutor( |
| 121 | groupedThreads("onos/store/device/mastership", "event-handler", log)); |
| 122 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 123 | messageHandlingExecutor = |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 124 | Executors.newSingleThreadExecutor( |
HIGUCHI Yuta | 060da9a | 2016-03-11 19:16:35 -0800 | [diff] [blame] | 125 | groupedThreads("onos/store/device/mastership", "message-handler", log)); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 126 | transferExecutor = |
| 127 | Executors.newSingleThreadScheduledExecutor( |
HIGUCHI Yuta | 060da9a | 2016-03-11 19:16:35 -0800 | [diff] [blame] | 128 | groupedThreads("onos/store/device/mastership", "mastership-transfer-executor", log)); |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 129 | clusterCommunicator.addSubscriber(ROLE_RELINQUISH_SUBJECT, |
Madan Jampani | d46e18f | 2015-05-04 23:19:33 -0700 | [diff] [blame] | 130 | SERIALIZER::decode, |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 131 | this::relinquishLocalRole, |
Madan Jampani | d46e18f | 2015-05-04 23:19:33 -0700 | [diff] [blame] | 132 | SERIALIZER::encode, |
| 133 | messageHandlingExecutor); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 134 | localNodeId = clusterService.getLocalNode().id(); |
| 135 | leadershipService.addListener(leadershipEventListener); |
| 136 | |
Madan Jampani | afeebbd | 2015-05-19 15:26:01 -0700 | [diff] [blame] | 137 | log.info("Started"); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 138 | } |
| 139 | |
| 140 | @Deactivate |
| 141 | public void deactivate() { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 142 | clusterCommunicator.removeSubscriber(ROLE_RELINQUISH_SUBJECT); |
Madan Jampani | 71c32ca | 2016-06-22 08:23:18 -0700 | [diff] [blame] | 143 | leadershipService.removeListener(leadershipEventListener); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 144 | messageHandlingExecutor.shutdown(); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 145 | transferExecutor.shutdown(); |
Madan Jampani | 71c32ca | 2016-06-22 08:23:18 -0700 | [diff] [blame] | 146 | eventHandler.shutdown(); |
Madan Jampani | afeebbd | 2015-05-19 15:26:01 -0700 | [diff] [blame] | 147 | log.info("Stopped"); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 148 | } |
| 149 | |
| 150 | @Override |
Madan Jampani | de003d9 | 2015-05-11 17:14:20 -0700 | [diff] [blame] | 151 | public CompletableFuture<MastershipRole> requestRole(DeviceId deviceId) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 152 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 153 | |
| 154 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 155 | Leadership leadership = leadershipService.runForLeadership(leadershipTopic); |
Jordan Halterman | 980a8c1 | 2017-09-22 18:01:19 -0700 | [diff] [blame] | 156 | NodeId leader = leadership == null ? null : leadership.leaderNodeId(); |
| 157 | List<NodeId> candidates = leadership == null ? |
| 158 | ImmutableList.of() : ImmutableList.copyOf(leadership.candidates()); |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 159 | MastershipRole role = Objects.equals(localNodeId, leader) ? |
Jordan Halterman | 980a8c1 | 2017-09-22 18:01:19 -0700 | [diff] [blame] | 160 | MastershipRole.MASTER : candidates.contains(localNodeId) ? MastershipRole.STANDBY : MastershipRole.NONE; |
| 161 | return CompletableFuture.completedFuture(role); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 162 | } |
| 163 | |
| 164 | @Override |
| 165 | public MastershipRole getRole(NodeId nodeId, DeviceId deviceId) { |
| 166 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 167 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 168 | |
| 169 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 170 | Leadership leadership = leadershipService.getLeadership(leadershipTopic); |
| 171 | NodeId leader = leadership == null ? null : leadership.leaderNodeId(); |
| 172 | List<NodeId> candidates = leadership == null ? |
| 173 | ImmutableList.of() : ImmutableList.copyOf(leadership.candidates()); |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 174 | return Objects.equals(nodeId, leader) ? |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 175 | MastershipRole.MASTER : candidates.contains(nodeId) ? MastershipRole.STANDBY : MastershipRole.NONE; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 176 | } |
| 177 | |
| 178 | @Override |
| 179 | public NodeId getMaster(DeviceId deviceId) { |
| 180 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 181 | |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 182 | return leadershipService.getLeader(createDeviceMastershipTopic(deviceId)); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 183 | } |
| 184 | |
| 185 | @Override |
| 186 | public RoleInfo getNodes(DeviceId deviceId) { |
| 187 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 188 | Leadership leadership = leadershipService.getLeadership(createDeviceMastershipTopic(deviceId)); |
| 189 | return new RoleInfo(leadership.leaderNodeId(), leadership.candidates()); |
| 190 | } |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 191 | |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 192 | @Override |
| 193 | public MastershipInfo getMastership(DeviceId deviceId) { |
| 194 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 195 | Leadership leadership = leadershipService.getLeadership(createDeviceMastershipTopic(deviceId)); |
| 196 | return buildMastershipFromLeadership(leadership); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 197 | } |
| 198 | |
| 199 | @Override |
| 200 | public Set<DeviceId> getDevices(NodeId nodeId) { |
| 201 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 202 | |
Yuta HIGUCHI | d934003 | 2017-01-25 09:25:44 -0800 | [diff] [blame] | 203 | // FIXME This result contains REMOVED device. |
| 204 | // MastershipService cannot listen to DeviceEvent to GC removed topic, |
| 205 | // since DeviceManager depend on it. |
| 206 | // Reference count, etc. at LeadershipService layer? |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 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() |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 252 | .filter(candidate -> !Objects.equals(nodeId, candidate)) |
Madan Jampani | d46e18f | 2015-05-04 23:19:33 -0700 | [diff] [blame] | 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); |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 293 | return CompletableFuture.completedFuture(new MastershipEvent(eventType, deviceId, getMastership(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 | |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 301 | private MastershipInfo buildMastershipFromLeadership(Leadership leadership) { |
| 302 | ImmutableMap.Builder<NodeId, MastershipRole> builder = ImmutableMap.builder(); |
| 303 | if (leadership.leaderNodeId() != null) { |
| 304 | builder.put(leadership.leaderNodeId(), MastershipRole.MASTER); |
| 305 | } |
| 306 | leadership.candidates().stream() |
| 307 | .filter(nodeId -> !Objects.equals(leadership.leaderNodeId(), nodeId)) |
| 308 | .forEach(nodeId -> builder.put(nodeId, MastershipRole.STANDBY)); |
| 309 | clusterService.getNodes().stream() |
| 310 | .filter(node -> !Objects.equals(leadership.leaderNodeId(), node.id())) |
| 311 | .filter(node -> !leadership.candidates().contains(node.id())) |
| 312 | .forEach(node -> builder.put(node.id(), MastershipRole.NONE)); |
| 313 | |
| 314 | return new MastershipInfo( |
| 315 | leadership.leader() != null ? leadership.leader().term() : 0, |
| 316 | leadership.leader() != null |
| 317 | ? Optional.of(leadership.leader().nodeId()) |
| 318 | : Optional.empty(), |
| 319 | builder.build()); |
| 320 | } |
| 321 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 322 | private class InternalDeviceMastershipEventListener implements LeadershipEventListener { |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 323 | |
| 324 | @Override |
| 325 | public boolean isRelevant(LeadershipEvent event) { |
| 326 | Leadership leadership = event.subject(); |
| 327 | return isDeviceMastershipTopic(leadership.topic()); |
| 328 | } |
| 329 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 330 | @Override |
| 331 | public void event(LeadershipEvent event) { |
Madan Jampani | 71c32ca | 2016-06-22 08:23:18 -0700 | [diff] [blame] | 332 | eventHandler.execute(() -> handleEvent(event)); |
| 333 | } |
| 334 | |
| 335 | private void handleEvent(LeadershipEvent event) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 336 | Leadership leadership = event.subject(); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 337 | DeviceId deviceId = extractDeviceIdFromTopic(leadership.topic()); |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 338 | MastershipInfo mastershipInfo = event.type() != LeadershipEvent.Type.SERVICE_DISRUPTED |
| 339 | ? buildMastershipFromLeadership(event.subject()) |
| 340 | : new MastershipInfo(); |
| 341 | |
Thomas Vachuska | 4b839c7 | 2015-05-18 15:43:03 -0700 | [diff] [blame] | 342 | switch (event.type()) { |
Jordan Halterman | a1ccbc3 | 2017-12-15 17:07:52 -0800 | [diff] [blame] | 343 | case LEADER_AND_CANDIDATES_CHANGED: |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 344 | notifyDelegate(new MastershipEvent(BACKUPS_CHANGED, deviceId, mastershipInfo)); |
| 345 | notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, mastershipInfo)); |
Jordan Halterman | a1ccbc3 | 2017-12-15 17:07:52 -0800 | [diff] [blame] | 346 | break; |
| 347 | case LEADER_CHANGED: |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 348 | notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, mastershipInfo)); |
Jordan Halterman | a1ccbc3 | 2017-12-15 17:07:52 -0800 | [diff] [blame] | 349 | break; |
| 350 | case CANDIDATES_CHANGED: |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 351 | notifyDelegate(new MastershipEvent(BACKUPS_CHANGED, deviceId, mastershipInfo)); |
Jordan Halterman | a1ccbc3 | 2017-12-15 17:07:52 -0800 | [diff] [blame] | 352 | break; |
| 353 | case SERVICE_DISRUPTED: |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 354 | notifyDelegate(new MastershipEvent(SUSPENDED, deviceId, mastershipInfo)); |
Jordan Halterman | a1ccbc3 | 2017-12-15 17:07:52 -0800 | [diff] [blame] | 355 | break; |
| 356 | case SERVICE_RESTORED: |
Andrea Campanella | 80b296d | 2018-09-18 10:48:15 +0200 | [diff] [blame] | 357 | notifyDelegate(new MastershipEvent(RESTORED, deviceId, mastershipInfo)); |
Jordan Halterman | a1ccbc3 | 2017-12-15 17:07:52 -0800 | [diff] [blame] | 358 | break; |
| 359 | default: |
| 360 | return; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 361 | } |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | private String createDeviceMastershipTopic(DeviceId deviceId) { |
Madan Jampani | 5756c35 | 2015-04-29 00:23:58 -0700 | [diff] [blame] | 366 | return String.format("device:%s", deviceId.toString()); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 367 | } |
| 368 | |
| 369 | private DeviceId extractDeviceIdFromTopic(String topic) { |
| 370 | Matcher m = DEVICE_MASTERSHIP_TOPIC_PATTERN.matcher(topic); |
| 371 | if (m.matches()) { |
| 372 | return DeviceId.deviceId(m.group(1)); |
| 373 | } else { |
| 374 | throw new IllegalArgumentException("Invalid device mastership topic: " + topic); |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | private boolean isDeviceMastershipTopic(String topic) { |
| 379 | Matcher m = DEVICE_MASTERSHIP_TOPIC_PATTERN.matcher(topic); |
| 380 | return m.matches(); |
| 381 | } |
Madan Jampani | dbe8a81 | 2016-01-31 21:10:46 -0800 | [diff] [blame] | 382 | } |