Thomas Vachuska | 4f1a60c | 2014-10-28 13:39:07 -0700 | [diff] [blame] | 1 | /* |
Brian O'Connor | a09fe5b | 2017-08-03 21:12:30 -0700 | [diff] [blame] | 2 | * Copyright 2015-present Open Networking Foundation |
Thomas Vachuska | 4f1a60c | 2014-10-28 13:39:07 -0700 | [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 | */ |
Thomas Vachuska | c97aa61 | 2015-06-23 16:00:18 -0700 | [diff] [blame] | 16 | package org.onosproject.store.trivial; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 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; |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame] | 20 | import com.google.common.collect.ImmutableSet; |
Madan Jampani | 7d2fab2 | 2015-03-18 17:21:57 -0700 | [diff] [blame] | 21 | import org.onlab.packet.IpAddress; |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 22 | import org.onosproject.cluster.ClusterEventListener; |
| 23 | import org.onosproject.cluster.ClusterService; |
| 24 | import org.onosproject.cluster.ControllerNode; |
| 25 | import org.onosproject.cluster.ControllerNode.State; |
| 26 | import org.onosproject.cluster.DefaultControllerNode; |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 27 | import org.onosproject.cluster.Node; |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 28 | import org.onosproject.cluster.NodeId; |
| 29 | import org.onosproject.cluster.RoleInfo; |
Jordan Halterman | f70bf46 | 2017-07-29 13:12:00 -0700 | [diff] [blame] | 30 | import org.onosproject.core.Version; |
| 31 | import org.onosproject.core.VersionService; |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 32 | import org.onosproject.mastership.MastershipEvent; |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 33 | import org.onosproject.mastership.MastershipInfo; |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 34 | import org.onosproject.mastership.MastershipStore; |
| 35 | import org.onosproject.mastership.MastershipStoreDelegate; |
| 36 | import org.onosproject.mastership.MastershipTerm; |
| 37 | import org.onosproject.net.DeviceId; |
| 38 | import org.onosproject.net.MastershipRole; |
| 39 | import org.onosproject.store.AbstractStore; |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame] | 40 | import org.osgi.service.component.annotations.Activate; |
| 41 | import org.osgi.service.component.annotations.Component; |
| 42 | import org.osgi.service.component.annotations.Deactivate; |
| 43 | import org.osgi.service.component.annotations.Reference; |
| 44 | import org.osgi.service.component.annotations.ReferenceCardinality; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 45 | import org.slf4j.Logger; |
| 46 | |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame] | 47 | import java.time.Instant; |
| 48 | import java.util.ArrayList; |
| 49 | import java.util.Collections; |
| 50 | import java.util.HashMap; |
| 51 | import java.util.HashSet; |
| 52 | import java.util.List; |
| 53 | import java.util.Map; |
| 54 | import java.util.Objects; |
| 55 | import java.util.Optional; |
| 56 | import java.util.Set; |
| 57 | import java.util.concurrent.CompletableFuture; |
| 58 | import java.util.concurrent.atomic.AtomicInteger; |
| 59 | |
| 60 | import static org.onosproject.mastership.MastershipEvent.Type.BACKUPS_CHANGED; |
| 61 | import static org.onosproject.mastership.MastershipEvent.Type.MASTER_CHANGED; |
| 62 | import static org.slf4j.LoggerFactory.getLogger; |
Ayaka Koshibe | fc981cf | 2014-10-21 12:44:17 -0700 | [diff] [blame] | 63 | |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 64 | /** |
| 65 | * Manages inventory of controller mastership over devices using |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 66 | * trivial, non-distributed in-memory structures implementation. |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 67 | */ |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame] | 68 | @Component(immediate = true, service = MastershipStore.class) |
tom | f80c972 | 2014-09-24 14:49:18 -0700 | [diff] [blame] | 69 | public class SimpleMastershipStore |
| 70 | extends AbstractStore<MastershipEvent, MastershipStoreDelegate> |
| 71 | implements MastershipStore { |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 72 | |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 73 | private final Logger log = getLogger(getClass()); |
| 74 | |
Yuta HIGUCHI | dfe6e3b | 2014-10-30 11:31:51 -0700 | [diff] [blame] | 75 | private static final int NOTHING = 0; |
| 76 | private static final int INIT = 1; |
| 77 | |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame] | 78 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 79 | protected ClusterService clusterService; |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 80 | |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame] | 81 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
Jordan Halterman | f70bf46 | 2017-07-29 13:12:00 -0700 | [diff] [blame] | 82 | protected VersionService versionService; |
| 83 | |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 84 | //devices mapped to their masters, to emulate multiple nodes |
Ayaka Koshibe | 3de43ca | 2014-09-26 16:40:23 -0700 | [diff] [blame] | 85 | protected final Map<DeviceId, NodeId> masterMap = new HashMap<>(); |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 86 | //emulate backups with pile of nodes |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 87 | protected final Map<DeviceId, List<NodeId>> backups = new HashMap<>(); |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 88 | //terms |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 89 | protected final Map<DeviceId, AtomicInteger> termMap = new HashMap<>(); |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 90 | |
| 91 | @Activate |
| 92 | public void activate() { |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 93 | if (clusterService == null) { |
| 94 | // just for ease of unit test |
| 95 | final ControllerNode instance = |
| 96 | new DefaultControllerNode(new NodeId("local"), |
| 97 | IpAddress.valueOf("127.0.0.1")); |
| 98 | |
| 99 | clusterService = new ClusterService() { |
| 100 | |
Yuta HIGUCHI | 0c47d53 | 2017-08-18 23:16:35 -0700 | [diff] [blame] | 101 | private final Instant creationTime = Instant.now(); |
Madan Jampani | 7d2fab2 | 2015-03-18 17:21:57 -0700 | [diff] [blame] | 102 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 103 | @Override |
| 104 | public ControllerNode getLocalNode() { |
| 105 | return instance; |
| 106 | } |
| 107 | |
| 108 | @Override |
| 109 | public Set<ControllerNode> getNodes() { |
| 110 | return ImmutableSet.of(instance); |
| 111 | } |
| 112 | |
| 113 | @Override |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 114 | public Set<Node> getConsensusNodes() { |
| 115 | return ImmutableSet.of(); |
| 116 | } |
| 117 | |
| 118 | @Override |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 119 | public ControllerNode getNode(NodeId nodeId) { |
| 120 | if (instance.id().equals(nodeId)) { |
| 121 | return instance; |
| 122 | } |
| 123 | return null; |
| 124 | } |
| 125 | |
| 126 | @Override |
| 127 | public State getState(NodeId nodeId) { |
| 128 | if (instance.id().equals(nodeId)) { |
| 129 | return State.ACTIVE; |
| 130 | } else { |
| 131 | return State.INACTIVE; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | @Override |
Jordan Halterman | f70bf46 | 2017-07-29 13:12:00 -0700 | [diff] [blame] | 136 | public Version getVersion(NodeId nodeId) { |
| 137 | if (instance.id().equals(nodeId)) { |
| 138 | return versionService.version(); |
| 139 | } |
| 140 | return null; |
| 141 | } |
| 142 | |
| 143 | @Override |
Yuta HIGUCHI | 0c47d53 | 2017-08-18 23:16:35 -0700 | [diff] [blame] | 144 | public Instant getLastUpdatedInstant(NodeId nodeId) { |
Madan Jampani | 7d2fab2 | 2015-03-18 17:21:57 -0700 | [diff] [blame] | 145 | return creationTime; |
| 146 | } |
| 147 | |
| 148 | @Override |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 149 | public void addListener(ClusterEventListener listener) { |
| 150 | } |
| 151 | |
| 152 | @Override |
| 153 | public void removeListener(ClusterEventListener listener) { |
| 154 | } |
| 155 | }; |
| 156 | } |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 157 | log.info("Started"); |
| 158 | } |
| 159 | |
| 160 | @Deactivate |
| 161 | public void deactivate() { |
| 162 | log.info("Stopped"); |
| 163 | } |
| 164 | |
| 165 | @Override |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 166 | public synchronized CompletableFuture<MastershipEvent> setMaster(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 167 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 168 | MastershipRole role = getRole(nodeId, deviceId); |
| 169 | switch (role) { |
| 170 | case MASTER: |
| 171 | // no-op |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 172 | return CompletableFuture.completedFuture(null); |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 173 | case STANDBY: |
| 174 | case NONE: |
| 175 | NodeId prevMaster = masterMap.put(deviceId, nodeId); |
| 176 | incrementTerm(deviceId); |
| 177 | removeFromBackups(deviceId, nodeId); |
| 178 | addToBackup(deviceId, prevMaster); |
| 179 | break; |
| 180 | default: |
| 181 | log.warn("unknown Mastership Role {}", role); |
| 182 | return null; |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 183 | } |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 184 | |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 185 | return CompletableFuture.completedFuture( |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 186 | new MastershipEvent(MASTER_CHANGED, deviceId, getMastership(deviceId))); |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 187 | } |
| 188 | |
| 189 | @Override |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 190 | public NodeId getMaster(DeviceId deviceId) { |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 191 | return masterMap.get(deviceId); |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 192 | } |
| 193 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 194 | // synchronized for atomic read |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 195 | @Override |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 196 | public synchronized RoleInfo getNodes(DeviceId deviceId) { |
| 197 | return new RoleInfo(masterMap.get(deviceId), |
| 198 | backups.getOrDefault(deviceId, ImmutableList.of())); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 199 | } |
| 200 | |
| 201 | @Override |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 202 | public Set<DeviceId> getDevices(NodeId nodeId) { |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 203 | Set<DeviceId> ids = new HashSet<>(); |
| 204 | for (Map.Entry<DeviceId, NodeId> d : masterMap.entrySet()) { |
Thomas Vachuska | a68be81 | 2014-11-27 11:49:54 -0800 | [diff] [blame] | 205 | if (Objects.equals(d.getValue(), nodeId)) { |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 206 | ids.add(d.getKey()); |
| 207 | } |
| 208 | } |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 209 | return ids; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 210 | } |
| 211 | |
| 212 | @Override |
Madan Jampani | de003d9 | 2015-05-11 17:14:20 -0700 | [diff] [blame] | 213 | public synchronized CompletableFuture<MastershipRole> requestRole(DeviceId deviceId) { |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 214 | //query+possible reelection |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 215 | NodeId node = clusterService.getLocalNode().id(); |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 216 | MastershipRole role = getRole(node, deviceId); |
| 217 | |
| 218 | switch (role) { |
| 219 | case MASTER: |
Madan Jampani | de003d9 | 2015-05-11 17:14:20 -0700 | [diff] [blame] | 220 | return CompletableFuture.completedFuture(MastershipRole.MASTER); |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 221 | case STANDBY: |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 222 | if (getMaster(deviceId) == null) { |
| 223 | // no master => become master |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 224 | masterMap.put(deviceId, node); |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 225 | incrementTerm(deviceId); |
| 226 | // remove from backup list |
| 227 | removeFromBackups(deviceId, node); |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 228 | notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, getMastership(deviceId))); |
Madan Jampani | de003d9 | 2015-05-11 17:14:20 -0700 | [diff] [blame] | 229 | return CompletableFuture.completedFuture(MastershipRole.MASTER); |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 230 | } |
Madan Jampani | de003d9 | 2015-05-11 17:14:20 -0700 | [diff] [blame] | 231 | return CompletableFuture.completedFuture(MastershipRole.STANDBY); |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 232 | case NONE: |
| 233 | if (getMaster(deviceId) == null) { |
| 234 | // no master => become master |
| 235 | masterMap.put(deviceId, node); |
| 236 | incrementTerm(deviceId); |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 237 | notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, getMastership(deviceId))); |
Madan Jampani | de003d9 | 2015-05-11 17:14:20 -0700 | [diff] [blame] | 238 | return CompletableFuture.completedFuture(MastershipRole.MASTER); |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 239 | } |
| 240 | // add to backup list |
| 241 | if (addToBackup(deviceId, node)) { |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 242 | notifyDelegate(new MastershipEvent(BACKUPS_CHANGED, deviceId, getMastership(deviceId))); |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 243 | } |
Madan Jampani | de003d9 | 2015-05-11 17:14:20 -0700 | [diff] [blame] | 244 | return CompletableFuture.completedFuture(MastershipRole.STANDBY); |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 245 | default: |
| 246 | log.warn("unknown Mastership Role {}", role); |
| 247 | } |
Madan Jampani | de003d9 | 2015-05-11 17:14:20 -0700 | [diff] [blame] | 248 | return CompletableFuture.completedFuture(role); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 249 | } |
| 250 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 251 | // add to backup if not there already, silently ignores null node |
| 252 | private synchronized boolean addToBackup(DeviceId deviceId, NodeId nodeId) { |
| 253 | boolean modified = false; |
| 254 | List<NodeId> stbys = backups.getOrDefault(deviceId, new ArrayList<>()); |
| 255 | if (nodeId != null && !stbys.contains(nodeId)) { |
| 256 | stbys.add(nodeId); |
| 257 | modified = true; |
| 258 | } |
| 259 | backups.put(deviceId, stbys); |
| 260 | return modified; |
| 261 | } |
| 262 | |
| 263 | private synchronized boolean removeFromBackups(DeviceId deviceId, NodeId node) { |
| 264 | List<NodeId> stbys = backups.getOrDefault(deviceId, new ArrayList<>()); |
| 265 | boolean modified = stbys.remove(node); |
| 266 | backups.put(deviceId, stbys); |
| 267 | return modified; |
| 268 | } |
| 269 | |
| 270 | private synchronized void incrementTerm(DeviceId deviceId) { |
| 271 | AtomicInteger term = termMap.getOrDefault(deviceId, new AtomicInteger(NOTHING)); |
| 272 | term.incrementAndGet(); |
| 273 | termMap.put(deviceId, term); |
| 274 | } |
| 275 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 276 | @Override |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 277 | public MastershipRole getRole(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 278 | //just query |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 279 | NodeId current = masterMap.get(deviceId); |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 280 | MastershipRole role; |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 281 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 282 | if (current != null && current.equals(nodeId)) { |
| 283 | return MastershipRole.MASTER; |
| 284 | } |
| 285 | |
| 286 | if (backups.getOrDefault(deviceId, Collections.emptyList()).contains(nodeId)) { |
| 287 | role = MastershipRole.STANDBY; |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 288 | } else { |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 289 | role = MastershipRole.NONE; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 290 | } |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 291 | return role; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 292 | } |
| 293 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 294 | // synchronized for atomic read |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 295 | @Override |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 296 | public synchronized MastershipTerm getTermFor(DeviceId deviceId) { |
Yuta HIGUCHI | dfe6e3b | 2014-10-30 11:31:51 -0700 | [diff] [blame] | 297 | if ((termMap.get(deviceId) == null)) { |
| 298 | return MastershipTerm.of(masterMap.get(deviceId), NOTHING); |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 299 | } |
| 300 | return MastershipTerm.of( |
| 301 | masterMap.get(deviceId), termMap.get(deviceId).get()); |
| 302 | } |
| 303 | |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 304 | @Override |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 305 | public MastershipInfo getMastership(DeviceId deviceId) { |
| 306 | ImmutableMap.Builder<NodeId, MastershipRole> roleBuilder = ImmutableMap.builder(); |
| 307 | NodeId master = masterMap.get(deviceId); |
| 308 | if (master != null) { |
| 309 | roleBuilder.put(master, MastershipRole.MASTER); |
| 310 | } |
| 311 | backups.getOrDefault(deviceId, Collections.emptyList()) |
| 312 | .forEach(nodeId -> roleBuilder.put(nodeId, MastershipRole.STANDBY)); |
| 313 | return new MastershipInfo( |
| 314 | termMap.getOrDefault(deviceId, new AtomicInteger(NOTHING)).get(), |
| 315 | Optional.ofNullable(master), |
| 316 | roleBuilder.build()); |
| 317 | } |
| 318 | |
| 319 | @Override |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 320 | public synchronized CompletableFuture<MastershipEvent> setStandby(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 321 | MastershipRole role = getRole(nodeId, deviceId); |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 322 | switch (role) { |
| 323 | case MASTER: |
| 324 | NodeId backup = reelect(deviceId, nodeId); |
| 325 | if (backup == null) { |
| 326 | // no master alternative |
| 327 | masterMap.remove(deviceId); |
| 328 | // TODO: Should there be new event type for no MASTER? |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 329 | return CompletableFuture.completedFuture( |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 330 | new MastershipEvent(MASTER_CHANGED, deviceId, getMastership(deviceId))); |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 331 | } else { |
| 332 | NodeId prevMaster = masterMap.put(deviceId, backup); |
| 333 | incrementTerm(deviceId); |
| 334 | addToBackup(deviceId, prevMaster); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 335 | return CompletableFuture.completedFuture( |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 336 | new MastershipEvent(MASTER_CHANGED, deviceId, getMastership(deviceId))); |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 337 | } |
Yuta HIGUCHI | 1b3f4db | 2014-11-18 11:04:31 -0800 | [diff] [blame] | 338 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 339 | case STANDBY: |
| 340 | case NONE: |
| 341 | boolean modified = addToBackup(deviceId, nodeId); |
| 342 | if (modified) { |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 343 | return CompletableFuture.completedFuture( |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 344 | new MastershipEvent(BACKUPS_CHANGED, deviceId, getMastership(deviceId))); |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 345 | } |
Yuta HIGUCHI | 1b3f4db | 2014-11-18 11:04:31 -0800 | [diff] [blame] | 346 | break; |
| 347 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 348 | default: |
| 349 | log.warn("unknown Mastership Role {}", role); |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 350 | } |
| 351 | return null; |
| 352 | } |
| 353 | |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 354 | //dumbly selects next-available node that's not the current one |
| 355 | //emulate leader election |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 356 | private synchronized NodeId reelect(DeviceId did, NodeId nodeId) { |
| 357 | List<NodeId> stbys = backups.getOrDefault(did, Collections.emptyList()); |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 358 | NodeId backup = null; |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 359 | for (NodeId n : stbys) { |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 360 | if (!n.equals(nodeId)) { |
| 361 | backup = n; |
| 362 | break; |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 363 | } |
| 364 | } |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 365 | stbys.remove(backup); |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 366 | return backup; |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 367 | } |
| 368 | |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 369 | @Override |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 370 | public synchronized CompletableFuture<MastershipEvent> relinquishRole(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | b62aab5 | 2014-10-24 13:15:25 -0700 | [diff] [blame] | 371 | MastershipRole role = getRole(nodeId, deviceId); |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 372 | switch (role) { |
| 373 | case MASTER: |
| 374 | NodeId backup = reelect(deviceId, nodeId); |
| 375 | masterMap.put(deviceId, backup); |
| 376 | incrementTerm(deviceId); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 377 | return CompletableFuture.completedFuture( |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 378 | new MastershipEvent(MASTER_CHANGED, deviceId, getMastership(deviceId))); |
Yuta HIGUCHI | 1b3f4db | 2014-11-18 11:04:31 -0800 | [diff] [blame] | 379 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 380 | case STANDBY: |
| 381 | if (removeFromBackups(deviceId, nodeId)) { |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 382 | return CompletableFuture.completedFuture( |
Jordan Halterman | 0a2bd45 | 2018-06-13 17:24:58 -0700 | [diff] [blame] | 383 | new MastershipEvent(BACKUPS_CHANGED, deviceId, getMastership(deviceId))); |
Ayaka Koshibe | b62aab5 | 2014-10-24 13:15:25 -0700 | [diff] [blame] | 384 | } |
Yuta HIGUCHI | 1b3f4db | 2014-11-18 11:04:31 -0800 | [diff] [blame] | 385 | break; |
| 386 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 387 | case NONE: |
Yuta HIGUCHI | 1b3f4db | 2014-11-18 11:04:31 -0800 | [diff] [blame] | 388 | break; |
| 389 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 390 | default: |
| 391 | log.warn("unknown Mastership Role {}", role); |
Ayaka Koshibe | b62aab5 | 2014-10-24 13:15:25 -0700 | [diff] [blame] | 392 | } |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 393 | return CompletableFuture.completedFuture(null); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 394 | } |
HIGUCHI Yuta | 59f0229 | 2015-02-25 19:51:48 -0800 | [diff] [blame] | 395 | |
| 396 | @Override |
| 397 | public synchronized void relinquishAllRole(NodeId nodeId) { |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 398 | List<CompletableFuture<MastershipEvent>> eventFutures = new ArrayList<>(); |
HIGUCHI Yuta | 59f0229 | 2015-02-25 19:51:48 -0800 | [diff] [blame] | 399 | Set<DeviceId> toRelinquish = new HashSet<>(); |
| 400 | |
| 401 | masterMap.entrySet().stream() |
| 402 | .filter(entry -> nodeId.equals(entry.getValue())) |
| 403 | .forEach(entry -> toRelinquish.add(entry.getKey())); |
| 404 | |
| 405 | backups.entrySet().stream() |
| 406 | .filter(entry -> entry.getValue().contains(nodeId)) |
| 407 | .forEach(entry -> toRelinquish.add(entry.getKey())); |
| 408 | |
Sho SHIMIZU | feafdca | 2015-09-11 15:02:21 -0700 | [diff] [blame] | 409 | toRelinquish.forEach(deviceId -> eventFutures.add(relinquishRole(nodeId, deviceId))); |
HIGUCHI Yuta | 59f0229 | 2015-02-25 19:51:48 -0800 | [diff] [blame] | 410 | |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 411 | eventFutures.forEach(future -> { |
Sho SHIMIZU | feafdca | 2015-09-11 15:02:21 -0700 | [diff] [blame] | 412 | future.whenComplete((event, error) -> notifyDelegate(event)); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 413 | }); |
HIGUCHI Yuta | 59f0229 | 2015-02-25 19:51:48 -0800 | [diff] [blame] | 414 | } |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 415 | } |