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; |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 26 | import java.util.Objects; |
| 27 | import java.util.Optional; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 28 | import java.util.Set; |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 29 | import java.util.concurrent.CompletableFuture; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 30 | import java.util.concurrent.ExecutorService; |
| 31 | import java.util.concurrent.Executors; |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 32 | import java.util.concurrent.ScheduledExecutorService; |
| 33 | import java.util.concurrent.TimeUnit; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 34 | import java.util.regex.Matcher; |
| 35 | import java.util.regex.Pattern; |
| 36 | import java.util.stream.Collectors; |
| 37 | |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 38 | import com.google.common.collect.ImmutableMap; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 39 | import org.apache.felix.scr.annotations.Activate; |
| 40 | import org.apache.felix.scr.annotations.Component; |
| 41 | import org.apache.felix.scr.annotations.Deactivate; |
| 42 | import org.apache.felix.scr.annotations.Reference; |
| 43 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 44 | import org.apache.felix.scr.annotations.Service; |
| 45 | import org.onlab.util.KryoNamespace; |
| 46 | import org.onosproject.cluster.ClusterService; |
| 47 | import org.onosproject.cluster.Leadership; |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 48 | import org.onosproject.cluster.LeadershipAdminService; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 49 | import org.onosproject.cluster.LeadershipEvent; |
| 50 | import org.onosproject.cluster.LeadershipEventListener; |
| 51 | import org.onosproject.cluster.LeadershipService; |
| 52 | import org.onosproject.cluster.NodeId; |
| 53 | import org.onosproject.cluster.RoleInfo; |
| 54 | import org.onosproject.mastership.MastershipEvent; |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 55 | import org.onosproject.mastership.MastershipInfo; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 56 | import org.onosproject.mastership.MastershipStore; |
| 57 | import org.onosproject.mastership.MastershipStoreDelegate; |
| 58 | import org.onosproject.mastership.MastershipTerm; |
| 59 | import org.onosproject.net.DeviceId; |
| 60 | import org.onosproject.net.MastershipRole; |
| 61 | import org.onosproject.store.AbstractStore; |
| 62 | import org.onosproject.store.cluster.messaging.ClusterCommunicationService; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 63 | import org.onosproject.store.cluster.messaging.MessageSubject; |
| 64 | import org.onosproject.store.serializers.KryoNamespaces; |
Jordan Halterman | 2c83a10 | 2017-08-20 17:11:41 -0700 | [diff] [blame] | 65 | import org.onosproject.store.service.Serializer; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 66 | import org.slf4j.Logger; |
| 67 | |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 68 | import com.google.common.collect.ImmutableList; |
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 | */ |
Sho SHIMIZU | 5c396e3 | 2016-08-12 15:19:12 -0700 | [diff] [blame] | 73 | @Component(immediate = 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 | 71c32ca | 2016-06-22 08:23:18 -0700 | [diff] [blame] | 101 | private ExecutorService eventHandler; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 102 | private ExecutorService messageHandlingExecutor; |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 103 | private ScheduledExecutorService transferExecutor; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 104 | private final LeadershipEventListener leadershipEventListener = |
| 105 | new InternalDeviceMastershipEventListener(); |
| 106 | |
| 107 | private static final String NODE_ID_NULL = "Node ID cannot be null"; |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 108 | private static final String DEVICE_ID_NULL = "Device ID cannot be null"; |
| 109 | private static final int WAIT_BEFORE_MASTERSHIP_HANDOFF_MILLIS = 3000; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 110 | |
Jordan Halterman | 2c83a10 | 2017-08-20 17:11:41 -0700 | [diff] [blame] | 111 | public static final Serializer SERIALIZER = Serializer.using( |
HIGUCHI Yuta | e729065 | 2016-05-18 11:29:01 -0700 | [diff] [blame] | 112 | KryoNamespace.newBuilder() |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 113 | .register(KryoNamespaces.API) |
| 114 | .register(MastershipRole.class) |
| 115 | .register(MastershipEvent.class) |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 116 | .register(MastershipEvent.Type.class) |
HIGUCHI Yuta | e729065 | 2016-05-18 11:29:01 -0700 | [diff] [blame] | 117 | .build("MastershipStore")); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 118 | |
| 119 | @Activate |
| 120 | public void activate() { |
Madan Jampani | 71c32ca | 2016-06-22 08:23:18 -0700 | [diff] [blame] | 121 | |
| 122 | eventHandler = Executors.newSingleThreadExecutor( |
| 123 | groupedThreads("onos/store/device/mastership", "event-handler", log)); |
| 124 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 125 | messageHandlingExecutor = |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 126 | Executors.newSingleThreadExecutor( |
HIGUCHI Yuta | 060da9a | 2016-03-11 19:16:35 -0800 | [diff] [blame] | 127 | groupedThreads("onos/store/device/mastership", "message-handler", log)); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 128 | transferExecutor = |
| 129 | Executors.newSingleThreadScheduledExecutor( |
HIGUCHI Yuta | 060da9a | 2016-03-11 19:16:35 -0800 | [diff] [blame] | 130 | groupedThreads("onos/store/device/mastership", "mastership-transfer-executor", log)); |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 131 | clusterCommunicator.addSubscriber(ROLE_RELINQUISH_SUBJECT, |
Madan Jampani | d46e18f | 2015-05-04 23:19:33 -0700 | [diff] [blame] | 132 | SERIALIZER::decode, |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 133 | this::relinquishLocalRole, |
Madan Jampani | d46e18f | 2015-05-04 23:19:33 -0700 | [diff] [blame] | 134 | SERIALIZER::encode, |
| 135 | messageHandlingExecutor); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 136 | localNodeId = clusterService.getLocalNode().id(); |
| 137 | leadershipService.addListener(leadershipEventListener); |
| 138 | |
Madan Jampani | afeebbd | 2015-05-19 15:26:01 -0700 | [diff] [blame] | 139 | log.info("Started"); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 140 | } |
| 141 | |
| 142 | @Deactivate |
| 143 | public void deactivate() { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 144 | clusterCommunicator.removeSubscriber(ROLE_RELINQUISH_SUBJECT); |
Madan Jampani | 71c32ca | 2016-06-22 08:23:18 -0700 | [diff] [blame] | 145 | leadershipService.removeListener(leadershipEventListener); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 146 | messageHandlingExecutor.shutdown(); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 147 | transferExecutor.shutdown(); |
Madan Jampani | 71c32ca | 2016-06-22 08:23:18 -0700 | [diff] [blame] | 148 | eventHandler.shutdown(); |
Madan Jampani | afeebbd | 2015-05-19 15:26:01 -0700 | [diff] [blame] | 149 | log.info("Stopped"); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 150 | } |
| 151 | |
| 152 | @Override |
Madan Jampani | de003d9 | 2015-05-11 17:14:20 -0700 | [diff] [blame] | 153 | public CompletableFuture<MastershipRole> requestRole(DeviceId deviceId) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 154 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 155 | |
| 156 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 157 | Leadership leadership = leadershipService.runForLeadership(leadershipTopic); |
Jordan Halterman | 980a8c1 | 2017-09-22 18:01:19 -0700 | [diff] [blame] | 158 | NodeId leader = leadership == null ? null : leadership.leaderNodeId(); |
| 159 | List<NodeId> candidates = leadership == null ? |
| 160 | ImmutableList.of() : ImmutableList.copyOf(leadership.candidates()); |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 161 | MastershipRole role = Objects.equals(localNodeId, leader) ? |
Jordan Halterman | 980a8c1 | 2017-09-22 18:01:19 -0700 | [diff] [blame] | 162 | MastershipRole.MASTER : candidates.contains(localNodeId) ? MastershipRole.STANDBY : MastershipRole.NONE; |
| 163 | return CompletableFuture.completedFuture(role); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 164 | } |
| 165 | |
| 166 | @Override |
| 167 | public MastershipRole getRole(NodeId nodeId, DeviceId deviceId) { |
| 168 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 169 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 170 | |
| 171 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 172 | Leadership leadership = leadershipService.getLeadership(leadershipTopic); |
| 173 | NodeId leader = leadership == null ? null : leadership.leaderNodeId(); |
| 174 | List<NodeId> candidates = leadership == null ? |
| 175 | ImmutableList.of() : ImmutableList.copyOf(leadership.candidates()); |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 176 | return Objects.equals(nodeId, leader) ? |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 177 | MastershipRole.MASTER : candidates.contains(nodeId) ? MastershipRole.STANDBY : MastershipRole.NONE; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | @Override |
| 181 | public NodeId getMaster(DeviceId deviceId) { |
| 182 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 183 | |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 184 | return leadershipService.getLeader(createDeviceMastershipTopic(deviceId)); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 185 | } |
| 186 | |
| 187 | @Override |
| 188 | public RoleInfo getNodes(DeviceId deviceId) { |
| 189 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 190 | Leadership leadership = leadershipService.getLeadership(createDeviceMastershipTopic(deviceId)); |
| 191 | return new RoleInfo(leadership.leaderNodeId(), leadership.candidates()); |
| 192 | } |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 193 | |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 194 | @Override |
| 195 | public MastershipInfo getMastership(DeviceId deviceId) { |
| 196 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 197 | Leadership leadership = leadershipService.getLeadership(createDeviceMastershipTopic(deviceId)); |
| 198 | return buildMastershipFromLeadership(leadership); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 199 | } |
| 200 | |
| 201 | @Override |
| 202 | public Set<DeviceId> getDevices(NodeId nodeId) { |
| 203 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 204 | |
Yuta HIGUCHI | d934003 | 2017-01-25 09:25:44 -0800 | [diff] [blame] | 205 | // FIXME This result contains REMOVED device. |
| 206 | // MastershipService cannot listen to DeviceEvent to GC removed topic, |
| 207 | // since DeviceManager depend on it. |
| 208 | // Reference count, etc. at LeadershipService layer? |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 209 | return leadershipService |
| 210 | .ownedTopics(nodeId) |
| 211 | .stream() |
| 212 | .filter(this::isDeviceMastershipTopic) |
| 213 | .map(this::extractDeviceIdFromTopic) |
| 214 | .collect(Collectors.toSet()); |
| 215 | } |
| 216 | |
| 217 | @Override |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 218 | public CompletableFuture<MastershipEvent> setMaster(NodeId nodeId, DeviceId deviceId) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 219 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 220 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 221 | |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 222 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
| 223 | if (leadershipAdminService.promoteToTopOfCandidateList(leadershipTopic, nodeId)) { |
| 224 | transferExecutor.schedule(() -> leadershipAdminService.transferLeadership(leadershipTopic, nodeId), |
| 225 | WAIT_BEFORE_MASTERSHIP_HANDOFF_MILLIS, TimeUnit.MILLISECONDS); |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 226 | } |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 227 | return CompletableFuture.completedFuture(null); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 228 | } |
| 229 | |
| 230 | @Override |
| 231 | public MastershipTerm getTermFor(DeviceId deviceId) { |
| 232 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 233 | |
| 234 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
| 235 | Leadership leadership = leadershipService.getLeadership(leadershipTopic); |
Madan Jampani | dbe8a81 | 2016-01-31 21:10:46 -0800 | [diff] [blame] | 236 | return leadership != null && leadership.leaderNodeId() != null ? |
| 237 | MastershipTerm.of(leadership.leaderNodeId(), leadership.leader().term()) : null; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 238 | } |
| 239 | |
| 240 | @Override |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 241 | public CompletableFuture<MastershipEvent> setStandby(NodeId nodeId, DeviceId deviceId) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 242 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 243 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 244 | |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 245 | NodeId currentMaster = getMaster(deviceId); |
| 246 | if (!nodeId.equals(currentMaster)) { |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 247 | return CompletableFuture.completedFuture(null); |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 248 | } |
Madan Jampani | d46e18f | 2015-05-04 23:19:33 -0700 | [diff] [blame] | 249 | |
| 250 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
| 251 | List<NodeId> candidates = leadershipService.getCandidates(leadershipTopic); |
| 252 | |
| 253 | NodeId newMaster = candidates.stream() |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 254 | .filter(candidate -> !Objects.equals(nodeId, candidate)) |
Madan Jampani | d46e18f | 2015-05-04 23:19:33 -0700 | [diff] [blame] | 255 | .findFirst() |
| 256 | .orElse(null); |
| 257 | log.info("Transitioning to role {} for {}. Next master: {}", |
| 258 | newMaster != null ? MastershipRole.STANDBY : MastershipRole.NONE, deviceId, newMaster); |
| 259 | |
| 260 | if (newMaster != null) { |
| 261 | return setMaster(newMaster, deviceId); |
| 262 | } |
| 263 | return relinquishRole(nodeId, deviceId); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 264 | } |
| 265 | |
| 266 | @Override |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 267 | public CompletableFuture<MastershipEvent> relinquishRole(NodeId nodeId, DeviceId deviceId) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 268 | checkArgument(nodeId != null, NODE_ID_NULL); |
| 269 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
| 270 | |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 271 | if (nodeId.equals(localNodeId)) { |
| 272 | return relinquishLocalRole(deviceId); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 273 | } |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 274 | |
| 275 | log.debug("Forwarding request to relinquish " |
| 276 | + "role for device {} to {}", deviceId, nodeId); |
| 277 | return clusterCommunicator.sendAndReceive( |
| 278 | deviceId, |
| 279 | ROLE_RELINQUISH_SUBJECT, |
| 280 | SERIALIZER::encode, |
| 281 | SERIALIZER::decode, |
| 282 | nodeId); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 283 | } |
| 284 | |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 285 | private CompletableFuture<MastershipEvent> relinquishLocalRole(DeviceId deviceId) { |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 286 | checkArgument(deviceId != null, DEVICE_ID_NULL); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 287 | |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 288 | String leadershipTopic = createDeviceMastershipTopic(deviceId); |
| 289 | if (!leadershipService.getCandidates(leadershipTopic).contains(localNodeId)) { |
Madan Jampani | bbed4042 | 2015-05-20 12:00:38 -0700 | [diff] [blame] | 290 | return CompletableFuture.completedFuture(null); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 291 | } |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 292 | MastershipEvent.Type eventType = localNodeId.equals(leadershipService.getLeader(leadershipTopic)) ? |
| 293 | MastershipEvent.Type.MASTER_CHANGED : MastershipEvent.Type.BACKUPS_CHANGED; |
| 294 | leadershipService.withdraw(leadershipTopic); |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 295 | return CompletableFuture.completedFuture(new MastershipEvent(eventType, deviceId, getMastership(deviceId))); |
Madan Jampani | 1af8e13 | 2015-04-30 16:41:18 -0700 | [diff] [blame] | 296 | } |
| 297 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 298 | @Override |
| 299 | public void relinquishAllRole(NodeId nodeId) { |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 300 | // Noop. LeadershipService already takes care of detecting and purging stale locks. |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 301 | } |
| 302 | |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 303 | private MastershipInfo buildMastershipFromLeadership(Leadership leadership) { |
| 304 | ImmutableMap.Builder<NodeId, MastershipRole> builder = ImmutableMap.builder(); |
| 305 | if (leadership.leaderNodeId() != null) { |
| 306 | builder.put(leadership.leaderNodeId(), MastershipRole.MASTER); |
| 307 | } |
| 308 | leadership.candidates().stream() |
| 309 | .filter(nodeId -> !Objects.equals(leadership.leaderNodeId(), nodeId)) |
| 310 | .forEach(nodeId -> builder.put(nodeId, MastershipRole.STANDBY)); |
| 311 | clusterService.getNodes().stream() |
| 312 | .filter(node -> !Objects.equals(leadership.leaderNodeId(), node.id())) |
| 313 | .filter(node -> !leadership.candidates().contains(node.id())) |
| 314 | .forEach(node -> builder.put(node.id(), MastershipRole.NONE)); |
| 315 | |
| 316 | return new MastershipInfo( |
| 317 | leadership.leader() != null ? leadership.leader().term() : 0, |
| 318 | leadership.leader() != null |
| 319 | ? Optional.of(leadership.leader().nodeId()) |
| 320 | : Optional.empty(), |
| 321 | builder.build()); |
| 322 | } |
| 323 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 324 | private class InternalDeviceMastershipEventListener implements LeadershipEventListener { |
Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 325 | |
| 326 | @Override |
| 327 | public boolean isRelevant(LeadershipEvent event) { |
| 328 | Leadership leadership = event.subject(); |
| 329 | return isDeviceMastershipTopic(leadership.topic()); |
| 330 | } |
| 331 | |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 332 | @Override |
| 333 | public void event(LeadershipEvent event) { |
Madan Jampani | 71c32ca | 2016-06-22 08:23:18 -0700 | [diff] [blame] | 334 | eventHandler.execute(() -> handleEvent(event)); |
| 335 | } |
| 336 | |
| 337 | private void handleEvent(LeadershipEvent event) { |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 338 | Leadership leadership = event.subject(); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 339 | DeviceId deviceId = extractDeviceIdFromTopic(leadership.topic()); |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 340 | MastershipInfo mastershipInfo = event.type() != LeadershipEvent.Type.SERVICE_DISRUPTED |
| 341 | ? buildMastershipFromLeadership(event.subject()) |
| 342 | : new MastershipInfo(); |
| 343 | |
Thomas Vachuska | 4b839c7 | 2015-05-18 15:43:03 -0700 | [diff] [blame] | 344 | switch (event.type()) { |
Jordan Halterman | a1ccbc3 | 2017-12-15 17:07:52 -0800 | [diff] [blame] | 345 | case LEADER_AND_CANDIDATES_CHANGED: |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 346 | notifyDelegate(new MastershipEvent(BACKUPS_CHANGED, deviceId, mastershipInfo)); |
| 347 | notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, mastershipInfo)); |
Jordan Halterman | a1ccbc3 | 2017-12-15 17:07:52 -0800 | [diff] [blame] | 348 | break; |
| 349 | case LEADER_CHANGED: |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 350 | notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, mastershipInfo)); |
Jordan Halterman | a1ccbc3 | 2017-12-15 17:07:52 -0800 | [diff] [blame] | 351 | break; |
| 352 | case CANDIDATES_CHANGED: |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 353 | notifyDelegate(new MastershipEvent(BACKUPS_CHANGED, deviceId, mastershipInfo)); |
Jordan Halterman | a1ccbc3 | 2017-12-15 17:07:52 -0800 | [diff] [blame] | 354 | break; |
| 355 | case SERVICE_DISRUPTED: |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 356 | notifyDelegate(new MastershipEvent(SUSPENDED, deviceId, mastershipInfo)); |
Jordan Halterman | a1ccbc3 | 2017-12-15 17:07:52 -0800 | [diff] [blame] | 357 | break; |
| 358 | case SERVICE_RESTORED: |
| 359 | // Do nothing, wait for updates from peers |
| 360 | break; |
| 361 | default: |
| 362 | return; |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 363 | } |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | private String createDeviceMastershipTopic(DeviceId deviceId) { |
Madan Jampani | 5756c35 | 2015-04-29 00:23:58 -0700 | [diff] [blame] | 368 | return String.format("device:%s", deviceId.toString()); |
Madan Jampani | 84b6b40 | 2015-02-25 17:49:54 -0800 | [diff] [blame] | 369 | } |
| 370 | |
| 371 | private DeviceId extractDeviceIdFromTopic(String topic) { |
| 372 | Matcher m = DEVICE_MASTERSHIP_TOPIC_PATTERN.matcher(topic); |
| 373 | if (m.matches()) { |
| 374 | return DeviceId.deviceId(m.group(1)); |
| 375 | } else { |
| 376 | throw new IllegalArgumentException("Invalid device mastership topic: " + topic); |
| 377 | } |
| 378 | } |
| 379 | |
| 380 | private boolean isDeviceMastershipTopic(String topic) { |
| 381 | Matcher m = DEVICE_MASTERSHIP_TOPIC_PATTERN.matcher(topic); |
| 382 | return m.matches(); |
| 383 | } |
Madan Jampani | dbe8a81 | 2016-01-31 21:10:46 -0800 | [diff] [blame] | 384 | } |