Thomas Vachuska | 4f1a60c | 2014-10-28 13:39:07 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014 Open Networking Laboratory |
| 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 | */ |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 16 | package org.onosproject.store.trivial.impl; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 17 | |
| 18 | import static org.slf4j.LoggerFactory.getLogger; |
| 19 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 20 | import java.util.ArrayList; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 21 | import java.util.Collections; |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 22 | import java.util.HashMap; |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 23 | import java.util.HashSet; |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 24 | import java.util.List; |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 25 | import java.util.Map; |
Thomas Vachuska | a68be81 | 2014-11-27 11:49:54 -0800 | [diff] [blame] | 26 | import java.util.Objects; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 27 | import java.util.Set; |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 28 | import java.util.concurrent.atomic.AtomicInteger; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 29 | |
| 30 | import org.apache.felix.scr.annotations.Activate; |
| 31 | import org.apache.felix.scr.annotations.Component; |
| 32 | import org.apache.felix.scr.annotations.Deactivate; |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 33 | import org.apache.felix.scr.annotations.Reference; |
| 34 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 35 | import org.apache.felix.scr.annotations.Service; |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 36 | import org.onosproject.cluster.ClusterEventListener; |
| 37 | import org.onosproject.cluster.ClusterService; |
| 38 | import org.onosproject.cluster.ControllerNode; |
| 39 | import org.onosproject.cluster.ControllerNode.State; |
| 40 | import org.onosproject.cluster.DefaultControllerNode; |
| 41 | import org.onosproject.cluster.NodeId; |
| 42 | import org.onosproject.cluster.RoleInfo; |
| 43 | import org.onosproject.mastership.MastershipEvent; |
| 44 | import org.onosproject.mastership.MastershipStore; |
| 45 | import org.onosproject.mastership.MastershipStoreDelegate; |
| 46 | import org.onosproject.mastership.MastershipTerm; |
| 47 | import org.onosproject.net.DeviceId; |
| 48 | import org.onosproject.net.MastershipRole; |
| 49 | import org.onosproject.store.AbstractStore; |
Pavlin Radoslavov | 444b519 | 2014-10-28 10:45:19 -0700 | [diff] [blame] | 50 | import org.onlab.packet.IpAddress; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 51 | import org.slf4j.Logger; |
| 52 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 53 | import com.google.common.collect.ImmutableList; |
| 54 | import com.google.common.collect.ImmutableSet; |
Ayaka Koshibe | fc981cf | 2014-10-21 12:44:17 -0700 | [diff] [blame] | 55 | |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 56 | import static org.onosproject.mastership.MastershipEvent.Type.*; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 57 | |
| 58 | /** |
| 59 | * Manages inventory of controller mastership over devices using |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 60 | * trivial, non-distributed in-memory structures implementation. |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 61 | */ |
| 62 | @Component(immediate = true) |
| 63 | @Service |
tom | f80c972 | 2014-09-24 14:49:18 -0700 | [diff] [blame] | 64 | public class SimpleMastershipStore |
| 65 | extends AbstractStore<MastershipEvent, MastershipStoreDelegate> |
| 66 | implements MastershipStore { |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 67 | |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 68 | private final Logger log = getLogger(getClass()); |
| 69 | |
Yuta HIGUCHI | dfe6e3b | 2014-10-30 11:31:51 -0700 | [diff] [blame] | 70 | private static final int NOTHING = 0; |
| 71 | private static final int INIT = 1; |
| 72 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 73 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 74 | protected ClusterService clusterService; |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 75 | |
| 76 | //devices mapped to their masters, to emulate multiple nodes |
Ayaka Koshibe | 3de43ca | 2014-09-26 16:40:23 -0700 | [diff] [blame] | 77 | protected final Map<DeviceId, NodeId> masterMap = new HashMap<>(); |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 78 | //emulate backups with pile of nodes |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 79 | protected final Map<DeviceId, List<NodeId>> backups = new HashMap<>(); |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 80 | //terms |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 81 | protected final Map<DeviceId, AtomicInteger> termMap = new HashMap<>(); |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 82 | |
| 83 | @Activate |
| 84 | public void activate() { |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 85 | if (clusterService == null) { |
| 86 | // just for ease of unit test |
| 87 | final ControllerNode instance = |
| 88 | new DefaultControllerNode(new NodeId("local"), |
| 89 | IpAddress.valueOf("127.0.0.1")); |
| 90 | |
| 91 | clusterService = new ClusterService() { |
| 92 | |
| 93 | @Override |
| 94 | public ControllerNode getLocalNode() { |
| 95 | return instance; |
| 96 | } |
| 97 | |
| 98 | @Override |
| 99 | public Set<ControllerNode> getNodes() { |
| 100 | return ImmutableSet.of(instance); |
| 101 | } |
| 102 | |
| 103 | @Override |
| 104 | public ControllerNode getNode(NodeId nodeId) { |
| 105 | if (instance.id().equals(nodeId)) { |
| 106 | return instance; |
| 107 | } |
| 108 | return null; |
| 109 | } |
| 110 | |
| 111 | @Override |
| 112 | public State getState(NodeId nodeId) { |
| 113 | if (instance.id().equals(nodeId)) { |
| 114 | return State.ACTIVE; |
| 115 | } else { |
| 116 | return State.INACTIVE; |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | @Override |
| 121 | public void addListener(ClusterEventListener listener) { |
| 122 | } |
| 123 | |
| 124 | @Override |
| 125 | public void removeListener(ClusterEventListener listener) { |
| 126 | } |
| 127 | }; |
| 128 | } |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 129 | log.info("Started"); |
| 130 | } |
| 131 | |
| 132 | @Deactivate |
| 133 | public void deactivate() { |
| 134 | log.info("Stopped"); |
| 135 | } |
| 136 | |
| 137 | @Override |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 138 | public synchronized MastershipEvent setMaster(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 139 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 140 | MastershipRole role = getRole(nodeId, deviceId); |
| 141 | switch (role) { |
| 142 | case MASTER: |
| 143 | // no-op |
| 144 | return null; |
| 145 | case STANDBY: |
| 146 | case NONE: |
| 147 | NodeId prevMaster = masterMap.put(deviceId, nodeId); |
| 148 | incrementTerm(deviceId); |
| 149 | removeFromBackups(deviceId, nodeId); |
| 150 | addToBackup(deviceId, prevMaster); |
| 151 | break; |
| 152 | default: |
| 153 | log.warn("unknown Mastership Role {}", role); |
| 154 | return null; |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 155 | } |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 156 | |
Ayaka Koshibe | fc981cf | 2014-10-21 12:44:17 -0700 | [diff] [blame] | 157 | return new MastershipEvent(MASTER_CHANGED, deviceId, |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 158 | getNodes(deviceId)); |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 159 | } |
| 160 | |
| 161 | @Override |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 162 | public NodeId getMaster(DeviceId deviceId) { |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 163 | return masterMap.get(deviceId); |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 164 | } |
| 165 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 166 | // synchronized for atomic read |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 167 | @Override |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 168 | public synchronized RoleInfo getNodes(DeviceId deviceId) { |
| 169 | return new RoleInfo(masterMap.get(deviceId), |
| 170 | backups.getOrDefault(deviceId, ImmutableList.of())); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 171 | } |
| 172 | |
| 173 | @Override |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 174 | public Set<DeviceId> getDevices(NodeId nodeId) { |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 175 | Set<DeviceId> ids = new HashSet<>(); |
| 176 | for (Map.Entry<DeviceId, NodeId> d : masterMap.entrySet()) { |
Thomas Vachuska | a68be81 | 2014-11-27 11:49:54 -0800 | [diff] [blame] | 177 | if (Objects.equals(d.getValue(), nodeId)) { |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 178 | ids.add(d.getKey()); |
| 179 | } |
| 180 | } |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 181 | return ids; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 182 | } |
| 183 | |
| 184 | @Override |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 185 | public synchronized MastershipRole requestRole(DeviceId deviceId) { |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 186 | //query+possible reelection |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 187 | NodeId node = clusterService.getLocalNode().id(); |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 188 | MastershipRole role = getRole(node, deviceId); |
| 189 | |
| 190 | switch (role) { |
| 191 | case MASTER: |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 192 | return MastershipRole.MASTER; |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 193 | case STANDBY: |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 194 | if (getMaster(deviceId) == null) { |
| 195 | // no master => become master |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 196 | masterMap.put(deviceId, node); |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 197 | incrementTerm(deviceId); |
| 198 | // remove from backup list |
| 199 | removeFromBackups(deviceId, node); |
| 200 | notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, |
| 201 | getNodes(deviceId))); |
| 202 | return MastershipRole.MASTER; |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 203 | } |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 204 | return MastershipRole.STANDBY; |
| 205 | case NONE: |
| 206 | if (getMaster(deviceId) == null) { |
| 207 | // no master => become master |
| 208 | masterMap.put(deviceId, node); |
| 209 | incrementTerm(deviceId); |
| 210 | notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, |
| 211 | getNodes(deviceId))); |
| 212 | return MastershipRole.MASTER; |
| 213 | } |
| 214 | // add to backup list |
| 215 | if (addToBackup(deviceId, node)) { |
| 216 | notifyDelegate(new MastershipEvent(BACKUPS_CHANGED, deviceId, |
| 217 | getNodes(deviceId))); |
| 218 | } |
| 219 | return MastershipRole.STANDBY; |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 220 | default: |
| 221 | log.warn("unknown Mastership Role {}", role); |
| 222 | } |
| 223 | return role; |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 224 | } |
| 225 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 226 | // add to backup if not there already, silently ignores null node |
| 227 | private synchronized boolean addToBackup(DeviceId deviceId, NodeId nodeId) { |
| 228 | boolean modified = false; |
| 229 | List<NodeId> stbys = backups.getOrDefault(deviceId, new ArrayList<>()); |
| 230 | if (nodeId != null && !stbys.contains(nodeId)) { |
| 231 | stbys.add(nodeId); |
| 232 | modified = true; |
| 233 | } |
| 234 | backups.put(deviceId, stbys); |
| 235 | return modified; |
| 236 | } |
| 237 | |
| 238 | private synchronized boolean removeFromBackups(DeviceId deviceId, NodeId node) { |
| 239 | List<NodeId> stbys = backups.getOrDefault(deviceId, new ArrayList<>()); |
| 240 | boolean modified = stbys.remove(node); |
| 241 | backups.put(deviceId, stbys); |
| 242 | return modified; |
| 243 | } |
| 244 | |
| 245 | private synchronized void incrementTerm(DeviceId deviceId) { |
| 246 | AtomicInteger term = termMap.getOrDefault(deviceId, new AtomicInteger(NOTHING)); |
| 247 | term.incrementAndGet(); |
| 248 | termMap.put(deviceId, term); |
| 249 | } |
| 250 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 251 | @Override |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 252 | public MastershipRole getRole(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 253 | //just query |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 254 | NodeId current = masterMap.get(deviceId); |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 255 | MastershipRole role; |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 256 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 257 | if (current != null && current.equals(nodeId)) { |
| 258 | return MastershipRole.MASTER; |
| 259 | } |
| 260 | |
| 261 | if (backups.getOrDefault(deviceId, Collections.emptyList()).contains(nodeId)) { |
| 262 | role = MastershipRole.STANDBY; |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 263 | } else { |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 264 | role = MastershipRole.NONE; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 265 | } |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 266 | return role; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 267 | } |
| 268 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 269 | // synchronized for atomic read |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 270 | @Override |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 271 | public synchronized MastershipTerm getTermFor(DeviceId deviceId) { |
Yuta HIGUCHI | dfe6e3b | 2014-10-30 11:31:51 -0700 | [diff] [blame] | 272 | if ((termMap.get(deviceId) == null)) { |
| 273 | return MastershipTerm.of(masterMap.get(deviceId), NOTHING); |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 274 | } |
| 275 | return MastershipTerm.of( |
| 276 | masterMap.get(deviceId), termMap.get(deviceId).get()); |
| 277 | } |
| 278 | |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 279 | @Override |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 280 | public synchronized MastershipEvent setStandby(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 281 | MastershipRole role = getRole(nodeId, deviceId); |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 282 | switch (role) { |
| 283 | case MASTER: |
| 284 | NodeId backup = reelect(deviceId, nodeId); |
| 285 | if (backup == null) { |
| 286 | // no master alternative |
| 287 | masterMap.remove(deviceId); |
| 288 | // TODO: Should there be new event type for no MASTER? |
| 289 | return new MastershipEvent(MASTER_CHANGED, deviceId, |
| 290 | getNodes(deviceId)); |
| 291 | } else { |
| 292 | NodeId prevMaster = masterMap.put(deviceId, backup); |
| 293 | incrementTerm(deviceId); |
| 294 | addToBackup(deviceId, prevMaster); |
| 295 | return new MastershipEvent(MASTER_CHANGED, deviceId, |
| 296 | getNodes(deviceId)); |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 297 | } |
Yuta HIGUCHI | 1b3f4db | 2014-11-18 11:04:31 -0800 | [diff] [blame] | 298 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 299 | case STANDBY: |
| 300 | case NONE: |
| 301 | boolean modified = addToBackup(deviceId, nodeId); |
| 302 | if (modified) { |
| 303 | return new MastershipEvent(BACKUPS_CHANGED, deviceId, |
| 304 | getNodes(deviceId)); |
| 305 | } |
Yuta HIGUCHI | 1b3f4db | 2014-11-18 11:04:31 -0800 | [diff] [blame] | 306 | break; |
| 307 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 308 | default: |
| 309 | log.warn("unknown Mastership Role {}", role); |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 310 | } |
| 311 | return null; |
| 312 | } |
| 313 | |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 314 | //dumbly selects next-available node that's not the current one |
| 315 | //emulate leader election |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 316 | private synchronized NodeId reelect(DeviceId did, NodeId nodeId) { |
| 317 | List<NodeId> stbys = backups.getOrDefault(did, Collections.emptyList()); |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 318 | NodeId backup = null; |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 319 | for (NodeId n : stbys) { |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 320 | if (!n.equals(nodeId)) { |
| 321 | backup = n; |
| 322 | break; |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 323 | } |
| 324 | } |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 325 | stbys.remove(backup); |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 326 | return backup; |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 327 | } |
| 328 | |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 329 | @Override |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 330 | public synchronized MastershipEvent relinquishRole(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | b62aab5 | 2014-10-24 13:15:25 -0700 | [diff] [blame] | 331 | MastershipRole role = getRole(nodeId, deviceId); |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 332 | switch (role) { |
| 333 | case MASTER: |
| 334 | NodeId backup = reelect(deviceId, nodeId); |
| 335 | masterMap.put(deviceId, backup); |
| 336 | incrementTerm(deviceId); |
| 337 | return new MastershipEvent(MASTER_CHANGED, deviceId, |
| 338 | getNodes(deviceId)); |
Yuta HIGUCHI | 1b3f4db | 2014-11-18 11:04:31 -0800 | [diff] [blame] | 339 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 340 | case STANDBY: |
| 341 | if (removeFromBackups(deviceId, nodeId)) { |
| 342 | return new MastershipEvent(BACKUPS_CHANGED, deviceId, |
| 343 | getNodes(deviceId)); |
Ayaka Koshibe | b62aab5 | 2014-10-24 13:15:25 -0700 | [diff] [blame] | 344 | } |
Yuta HIGUCHI | 1b3f4db | 2014-11-18 11:04:31 -0800 | [diff] [blame] | 345 | break; |
| 346 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 347 | case NONE: |
Yuta HIGUCHI | 1b3f4db | 2014-11-18 11:04:31 -0800 | [diff] [blame] | 348 | break; |
| 349 | |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 350 | default: |
| 351 | log.warn("unknown Mastership Role {}", role); |
Ayaka Koshibe | b62aab5 | 2014-10-24 13:15:25 -0700 | [diff] [blame] | 352 | } |
| 353 | return null; |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 354 | } |
HIGUCHI Yuta | 59f0229 | 2015-02-25 19:51:48 -0800 | [diff] [blame] | 355 | |
| 356 | @Override |
| 357 | public synchronized void relinquishAllRole(NodeId nodeId) { |
| 358 | List<MastershipEvent> events = new ArrayList<>(); |
| 359 | Set<DeviceId> toRelinquish = new HashSet<>(); |
| 360 | |
| 361 | masterMap.entrySet().stream() |
| 362 | .filter(entry -> nodeId.equals(entry.getValue())) |
| 363 | .forEach(entry -> toRelinquish.add(entry.getKey())); |
| 364 | |
| 365 | backups.entrySet().stream() |
| 366 | .filter(entry -> entry.getValue().contains(nodeId)) |
| 367 | .forEach(entry -> toRelinquish.add(entry.getKey())); |
| 368 | |
| 369 | toRelinquish.forEach(deviceId -> { |
| 370 | MastershipEvent event = relinquishRole(nodeId, deviceId); |
| 371 | if (event != null) { |
| 372 | events.add(event); |
| 373 | } |
| 374 | }); |
| 375 | |
| 376 | notifyDelegate(events); |
| 377 | } |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 378 | } |