Thomas Vachuska | 4f1a60c | 2014-10-28 13:39:07 -0700 | [diff] [blame] | 1 | /* |
Ray Milkey | 34c9590 | 2015-04-15 09:47:53 -0700 | [diff] [blame] | 2 | * Copyright 2014-2015 Open Networking Laboratory |
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 | */ |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 16 | package org.onosproject.store.mastership.impl; |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 17 | |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 18 | import static org.onosproject.mastership.MastershipEvent.Type.MASTER_CHANGED; |
| 19 | import static org.onosproject.mastership.MastershipEvent.Type.BACKUPS_CHANGED; |
Yuta HIGUCHI | f1d159a | 2014-10-29 23:31:40 -0700 | [diff] [blame] | 20 | import static org.apache.commons.lang3.concurrent.ConcurrentUtils.putIfAbsent; |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 21 | |
HIGUCHI Yuta | 59f0229 | 2015-02-25 19:51:48 -0800 | [diff] [blame] | 22 | import java.util.ArrayList; |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 23 | import java.util.HashSet; |
HIGUCHI Yuta | 59f0229 | 2015-02-25 19:51:48 -0800 | [diff] [blame] | 24 | import java.util.List; |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 25 | import java.util.Map; |
HIGUCHI Yuta | 59f0229 | 2015-02-25 19:51:48 -0800 | [diff] [blame] | 26 | import java.util.Map.Entry; |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 27 | import java.util.Set; |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 28 | import java.util.concurrent.CompletableFuture; |
Yuta HIGUCHI | c8e19d4 | 2014-09-24 17:20:52 -0700 | [diff] [blame] | 29 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 30 | import org.apache.felix.scr.annotations.Activate; |
| 31 | import org.apache.felix.scr.annotations.Component; |
| 32 | import org.apache.felix.scr.annotations.Deactivate; |
| 33 | import org.apache.felix.scr.annotations.Reference; |
| 34 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 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.ClusterService; |
| 37 | import org.onosproject.cluster.NodeId; |
| 38 | import org.onosproject.cluster.RoleInfo; |
| 39 | import org.onosproject.mastership.MastershipEvent; |
| 40 | import org.onosproject.mastership.MastershipStore; |
| 41 | import org.onosproject.mastership.MastershipStoreDelegate; |
| 42 | import org.onosproject.mastership.MastershipTerm; |
| 43 | import org.onosproject.net.DeviceId; |
| 44 | import org.onosproject.net.MastershipRole; |
| 45 | import org.onosproject.store.hz.AbstractHazelcastStore; |
| 46 | import org.onosproject.store.hz.SMap; |
| 47 | import org.onosproject.store.serializers.KryoNamespaces; |
| 48 | import org.onosproject.store.serializers.KryoSerializer; |
Yuta HIGUCHI | 8d143d2 | 2014-10-19 23:15:09 -0700 | [diff] [blame] | 49 | import org.onlab.util.KryoNamespace; |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 50 | |
Ayaka Koshibe | 98bd12f | 2014-11-01 20:13:37 -0700 | [diff] [blame] | 51 | import com.google.common.base.Objects; |
Yuta HIGUCHI | d36a58e | 2014-12-02 12:46:33 -0800 | [diff] [blame] | 52 | import com.hazelcast.config.Config; |
| 53 | import com.hazelcast.config.MapConfig; |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 54 | import com.hazelcast.core.EntryEvent; |
| 55 | import com.hazelcast.core.EntryListener; |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 56 | import com.hazelcast.core.MapEvent; |
Yuta HIGUCHI | 41f2ec0 | 2014-10-27 09:54:43 -0700 | [diff] [blame] | 57 | |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 58 | import static org.onosproject.net.MastershipRole.*; |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 59 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 60 | /** |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 61 | * Distributed implementation of the mastership store. The store is |
| 62 | * responsible for the master selection process. |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 63 | */ |
Madan Jampani | 5756c35 | 2015-04-29 00:23:58 -0700 | [diff] [blame] | 64 | @Component(immediate = true, enabled = false) |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 65 | @Service |
tom | 0755a36 | 2014-09-24 11:54:43 -0700 | [diff] [blame] | 66 | public class DistributedMastershipStore |
Yuta HIGUCHI | b0daa15 | 2014-11-10 16:58:57 -0800 | [diff] [blame] | 67 | extends AbstractHazelcastStore<MastershipEvent, MastershipStoreDelegate> |
| 68 | implements MastershipStore { |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 69 | |
Yuta HIGUCHI | dfe6e3b | 2014-10-30 11:31:51 -0700 | [diff] [blame] | 70 | //term number representing that master has never been chosen yet |
| 71 | private static final Integer NOTHING = 0; |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 72 | //initial term/TTL value |
Yuta HIGUCHI | dfe6e3b | 2014-10-30 11:31:51 -0700 | [diff] [blame] | 73 | private static final Integer INIT = 1; |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 74 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 75 | //device to node roles |
Yuta HIGUCHI | d36a58e | 2014-12-02 12:46:33 -0800 | [diff] [blame] | 76 | private static final String NODE_ROLES_MAP_NAME = "nodeRoles"; |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 77 | protected SMap<DeviceId, RoleValue> roleMap; |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 78 | //devices to terms |
Yuta HIGUCHI | d36a58e | 2014-12-02 12:46:33 -0800 | [diff] [blame] | 79 | private static final String TERMS_MAP_NAME = "terms"; |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 80 | protected SMap<DeviceId, Integer> terms; |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 81 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 82 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 83 | protected ClusterService clusterService; |
| 84 | |
Yuta HIGUCHI | d1a63e9 | 2014-12-02 13:14:28 -0800 | [diff] [blame] | 85 | private String listenerId; |
| 86 | |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 87 | @Override |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 88 | @Activate |
| 89 | public void activate() { |
| 90 | super.activate(); |
| 91 | |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 92 | this.serializer = new KryoSerializer() { |
| 93 | @Override |
| 94 | protected void setupKryoPool() { |
Yuta HIGUCHI | 8d143d2 | 2014-10-19 23:15:09 -0700 | [diff] [blame] | 95 | serializerPool = KryoNamespace.newBuilder() |
| 96 | .register(KryoNamespaces.API) |
Yuta HIGUCHI | 91768e3 | 2014-11-22 05:06:35 -0800 | [diff] [blame] | 97 | .nextId(KryoNamespaces.BEGIN_USER_CUSTOM_ID) |
| 98 | .register(new RoleValueSerializer(), RoleValue.class) |
| 99 | .build(); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 100 | } |
| 101 | }; |
| 102 | |
Yuta HIGUCHI | d36a58e | 2014-12-02 12:46:33 -0800 | [diff] [blame] | 103 | final Config config = theInstance.getConfig(); |
| 104 | |
| 105 | MapConfig nodeRolesCfg = config.getMapConfig(NODE_ROLES_MAP_NAME); |
| 106 | nodeRolesCfg.setAsyncBackupCount(MapConfig.MAX_BACKUP_COUNT - nodeRolesCfg.getBackupCount()); |
| 107 | |
| 108 | MapConfig termsCfg = config.getMapConfig(TERMS_MAP_NAME); |
| 109 | termsCfg.setAsyncBackupCount(MapConfig.MAX_BACKUP_COUNT - termsCfg.getBackupCount()); |
| 110 | |
| 111 | roleMap = new SMap<>(theInstance.<byte[], byte[]>getMap(NODE_ROLES_MAP_NAME), this.serializer); |
Yuta HIGUCHI | d1a63e9 | 2014-12-02 13:14:28 -0800 | [diff] [blame] | 112 | listenerId = roleMap.addEntryListener((new RemoteMasterShipEventHandler()), true); |
Yuta HIGUCHI | d36a58e | 2014-12-02 12:46:33 -0800 | [diff] [blame] | 113 | terms = new SMap<>(theInstance.<byte[], byte[]>getMap(TERMS_MAP_NAME), this.serializer); |
Yuta HIGUCHI | c8e19d4 | 2014-09-24 17:20:52 -0700 | [diff] [blame] | 114 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 115 | log.info("Started"); |
| 116 | } |
| 117 | |
| 118 | @Deactivate |
| 119 | public void deactivate() { |
Yuta HIGUCHI | d1a63e9 | 2014-12-02 13:14:28 -0800 | [diff] [blame] | 120 | roleMap.removeEntryListener(listenerId); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 121 | log.info("Stopped"); |
| 122 | } |
| 123 | |
| 124 | @Override |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 125 | public MastershipRole getRole(NodeId nodeId, DeviceId deviceId) { |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 126 | final RoleValue roleInfo = roleMap.get(deviceId); |
| 127 | if (roleInfo != null) { |
| 128 | return roleInfo.getRole(nodeId); |
Ayaka Koshibe | a7384a8 | 2014-10-22 18:59:06 -0700 | [diff] [blame] | 129 | } |
| 130 | return NONE; |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 131 | } |
| 132 | |
| 133 | @Override |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 134 | public CompletableFuture<MastershipEvent> setMaster(NodeId newMaster, DeviceId deviceId) { |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 135 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 136 | roleMap.lock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 137 | try { |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 138 | final RoleValue rv = getRoleValue(deviceId); |
| 139 | final MastershipRole currentRole = rv.getRole(newMaster); |
| 140 | switch (currentRole) { |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 141 | case MASTER: |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 142 | //reinforce mastership |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 143 | // RoleInfo integrity check |
| 144 | boolean modified = rv.reassign(newMaster, STANDBY, NONE); |
| 145 | if (modified) { |
| 146 | roleMap.put(deviceId, rv); |
| 147 | // should never reach here. |
| 148 | log.warn("{} was in both MASTER and STANDBY for {}", newMaster, deviceId); |
| 149 | // trigger BACKUPS_CHANGED? |
| 150 | } |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 151 | return CompletableFuture.completedFuture(null); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 152 | case STANDBY: |
Ayaka Koshibe | a7384a8 | 2014-10-22 18:59:06 -0700 | [diff] [blame] | 153 | case NONE: |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 154 | final NodeId currentMaster = rv.get(MASTER); |
| 155 | if (currentMaster != null) { |
| 156 | // place current master in STANDBY |
| 157 | rv.reassign(currentMaster, NONE, STANDBY); |
| 158 | rv.replace(currentMaster, newMaster, MASTER); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 159 | } else { |
| 160 | //no master before so just add. |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 161 | rv.add(MASTER, newMaster); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 162 | } |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 163 | // remove newMaster from STANDBY |
| 164 | rv.reassign(newMaster, STANDBY, NONE); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 165 | updateTerm(deviceId); |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 166 | roleMap.put(deviceId, rv); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 167 | return CompletableFuture.completedFuture( |
| 168 | new MastershipEvent(MASTER_CHANGED, deviceId, rv.roleInfo())); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 169 | default: |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 170 | log.warn("unknown Mastership Role {}", currentRole); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 171 | return CompletableFuture.completedFuture(null); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 172 | } |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 173 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 174 | roleMap.unlock(deviceId); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 175 | } |
| 176 | } |
| 177 | |
| 178 | @Override |
| 179 | public NodeId getMaster(DeviceId deviceId) { |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 180 | return getNode(MASTER, deviceId); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 181 | } |
| 182 | |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 183 | |
| 184 | @Override |
Ayaka Koshibe | abedb09 | 2014-10-20 17:01:31 -0700 | [diff] [blame] | 185 | public RoleInfo getNodes(DeviceId deviceId) { |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 186 | RoleValue rv = roleMap.get(deviceId); |
| 187 | if (rv != null) { |
Ayaka Koshibe | abedb09 | 2014-10-20 17:01:31 -0700 | [diff] [blame] | 188 | return rv.roleInfo(); |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 189 | } else { |
| 190 | return new RoleInfo(); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 191 | } |
| 192 | } |
| 193 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 194 | @Override |
| 195 | public Set<DeviceId> getDevices(NodeId nodeId) { |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 196 | Set<DeviceId> devices = new HashSet<>(); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 197 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 198 | for (Map.Entry<DeviceId, RoleValue> el : roleMap.entrySet()) { |
| 199 | if (nodeId.equals(el.getValue().get(MASTER))) { |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 200 | devices.add(el.getKey()); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 201 | } |
| 202 | } |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 203 | |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 204 | return devices; |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 205 | } |
| 206 | |
| 207 | @Override |
Madan Jampani | de003d9 | 2015-05-11 17:14:20 -0700 | [diff] [blame] | 208 | public CompletableFuture<MastershipRole> requestRole(DeviceId deviceId) { |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 209 | |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 210 | // if no master => become master |
| 211 | // if there already exists a master: |
| 212 | // if I was the master return MASTER |
| 213 | // else put myself in STANDBY and return STANDBY |
| 214 | |
| 215 | final NodeId local = clusterService.getLocalNode().id(); |
| 216 | boolean modified = false; |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 217 | roleMap.lock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 218 | try { |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 219 | final RoleValue rv = getRoleValue(deviceId); |
| 220 | if (rv.get(MASTER) == null) { |
| 221 | // there's no master become one |
| 222 | // move out from STANDBY |
| 223 | rv.reassign(local, STANDBY, NONE); |
| 224 | rv.add(MASTER, local); |
| 225 | |
| 226 | updateTerm(deviceId); |
| 227 | roleMap.put(deviceId, rv); |
Madan Jampani | de003d9 | 2015-05-11 17:14:20 -0700 | [diff] [blame] | 228 | return CompletableFuture.completedFuture(MASTER); |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 229 | } |
| 230 | final MastershipRole currentRole = rv.getRole(local); |
| 231 | switch (currentRole) { |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 232 | case MASTER: |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 233 | // RoleInfo integrity check |
| 234 | modified = rv.reassign(local, STANDBY, NONE); |
| 235 | if (modified) { |
| 236 | log.warn("{} was in both MASTER and STANDBY for {}", local, deviceId); |
| 237 | // should never reach here, |
| 238 | // but heal if we happened to be there |
| 239 | roleMap.put(deviceId, rv); |
| 240 | // trigger BACKUPS_CHANGED? |
| 241 | } |
Madan Jampani | de003d9 | 2015-05-11 17:14:20 -0700 | [diff] [blame] | 242 | return CompletableFuture.completedFuture(currentRole); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 243 | case STANDBY: |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 244 | // RoleInfo integrity check |
| 245 | modified = rv.reassign(local, NONE, STANDBY); |
| 246 | if (modified) { |
| 247 | log.warn("{} was in both NONE and STANDBY for {}", local, deviceId); |
| 248 | // should never reach here, |
| 249 | // but heal if we happened to be there |
| 250 | roleMap.put(deviceId, rv); |
| 251 | // trigger BACKUPS_CHANGED? |
| 252 | } |
Madan Jampani | de003d9 | 2015-05-11 17:14:20 -0700 | [diff] [blame] | 253 | return CompletableFuture.completedFuture(currentRole); |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 254 | case NONE: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 255 | rv.reassign(local, NONE, STANDBY); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 256 | roleMap.put(deviceId, rv); |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 257 | // TODO: notifyDelegate BACKUPS_CHANGED |
Madan Jampani | de003d9 | 2015-05-11 17:14:20 -0700 | [diff] [blame] | 258 | return CompletableFuture.completedFuture(STANDBY); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 259 | default: |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 260 | log.warn("unknown Mastership Role {}", currentRole); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 261 | } |
Madan Jampani | de003d9 | 2015-05-11 17:14:20 -0700 | [diff] [blame] | 262 | return CompletableFuture.completedFuture(currentRole); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 263 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 264 | roleMap.unlock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 265 | } |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 266 | } |
| 267 | |
| 268 | @Override |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 269 | public MastershipTerm getTermFor(DeviceId deviceId) { |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 270 | // term information and role must be read atomically |
| 271 | // acquiring write lock for the device |
| 272 | roleMap.lock(deviceId); |
| 273 | try { |
| 274 | RoleValue rv = getRoleValue(deviceId); |
| 275 | final Integer term = terms.get(deviceId); |
| 276 | final NodeId master = rv.get(MASTER); |
Yuta HIGUCHI | dfe6e3b | 2014-10-30 11:31:51 -0700 | [diff] [blame] | 277 | if (term == null) { |
| 278 | return MastershipTerm.of(null, NOTHING); |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 279 | } |
| 280 | return MastershipTerm.of(master, term); |
| 281 | } finally { |
| 282 | roleMap.unlock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 283 | } |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 284 | } |
| 285 | |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 286 | @Override |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 287 | public CompletableFuture<MastershipEvent> setStandby(NodeId nodeId, DeviceId deviceId) { |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 288 | // if nodeId was MASTER, rotate STANDBY |
| 289 | // if nodeId was STANDBY no-op |
| 290 | // if nodeId was NONE, add to STANDBY |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 291 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 292 | roleMap.lock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 293 | try { |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 294 | final RoleValue rv = getRoleValue(deviceId); |
| 295 | final MastershipRole currentRole = getRole(nodeId, deviceId); |
| 296 | switch (currentRole) { |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 297 | case MASTER: |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 298 | NodeId newMaster = reelect(nodeId, deviceId, rv); |
| 299 | rv.reassign(nodeId, NONE, STANDBY); |
Yuta HIGUCHI | 0c6e184 | 2014-11-05 22:34:23 -0800 | [diff] [blame] | 300 | updateTerm(deviceId); |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 301 | if (newMaster != null) { |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 302 | roleMap.put(deviceId, rv); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 303 | return CompletableFuture.completedFuture( |
| 304 | new MastershipEvent(MASTER_CHANGED, deviceId, rv.roleInfo())); |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 305 | } else { |
| 306 | // no master candidate |
| 307 | roleMap.put(deviceId, rv); |
Yuta HIGUCHI | 6593489 | 2014-12-04 17:47:44 -0800 | [diff] [blame] | 308 | // TBD: Should there be new event type for no MASTER? |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 309 | return CompletableFuture.completedFuture( |
| 310 | new MastershipEvent(MASTER_CHANGED, deviceId, rv.roleInfo())); |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 311 | } |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 312 | case STANDBY: |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 313 | return CompletableFuture.completedFuture(null); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 314 | case NONE: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 315 | rv.reassign(nodeId, NONE, STANDBY); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 316 | roleMap.put(deviceId, rv); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 317 | return CompletableFuture.completedFuture( |
| 318 | new MastershipEvent(BACKUPS_CHANGED, deviceId, rv.roleInfo())); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 319 | default: |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 320 | log.warn("unknown Mastership Role {}", currentRole); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 321 | } |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 322 | return CompletableFuture.completedFuture(null); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 323 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 324 | roleMap.unlock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 325 | } |
| 326 | } |
| 327 | |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 328 | @Override |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 329 | public CompletableFuture<MastershipEvent> relinquishRole(NodeId nodeId, DeviceId deviceId) { |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 330 | // relinquishRole is basically set to None |
| 331 | |
| 332 | // If nodeId was master reelect next and remove nodeId |
| 333 | // else remove from STANDBY |
Ayaka Koshibe | 25fd23a | 2014-10-03 15:50:43 -0700 | [diff] [blame] | 334 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 335 | roleMap.lock(deviceId); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 336 | try { |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 337 | final RoleValue rv = getRoleValue(deviceId); |
| 338 | final MastershipRole currentRole = rv.getRole(nodeId); |
| 339 | switch (currentRole) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 340 | case MASTER: |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 341 | NodeId newMaster = reelect(nodeId, deviceId, rv); |
| 342 | if (newMaster != null) { |
Yuta HIGUCHI | f1d159a | 2014-10-29 23:31:40 -0700 | [diff] [blame] | 343 | updateTerm(deviceId); |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 344 | roleMap.put(deviceId, rv); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 345 | return CompletableFuture.completedFuture( |
| 346 | new MastershipEvent(MASTER_CHANGED, deviceId, rv.roleInfo())); |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 347 | } else { |
Ayaka Koshibe | 98bd12f | 2014-11-01 20:13:37 -0700 | [diff] [blame] | 348 | // No master candidate - no more backups, device is likely |
| 349 | // fully disconnected |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 350 | roleMap.put(deviceId, rv); |
| 351 | // Should there be new event type? |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 352 | return CompletableFuture.completedFuture(null); |
Ayaka Koshibe | e60d452 | 2014-10-28 15:07:00 -0700 | [diff] [blame] | 353 | } |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 354 | case STANDBY: |
| 355 | //fall through to reinforce relinquishment |
| 356 | case NONE: |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 357 | boolean modified = rv.reassign(nodeId, STANDBY, NONE); |
| 358 | if (modified) { |
| 359 | roleMap.put(deviceId, rv); |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 360 | return CompletableFuture.completedFuture( |
| 361 | new MastershipEvent(BACKUPS_CHANGED, deviceId, rv.roleInfo())); |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 362 | } |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 363 | return CompletableFuture.completedFuture(null); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 364 | default: |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 365 | log.warn("unknown Mastership Role {}", currentRole); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 366 | } |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 367 | return CompletableFuture.completedFuture(null); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 368 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 369 | roleMap.unlock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 370 | } |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 371 | } |
| 372 | |
HIGUCHI Yuta | 59f0229 | 2015-02-25 19:51:48 -0800 | [diff] [blame] | 373 | @Override |
| 374 | public void relinquishAllRole(NodeId nodeId) { |
| 375 | |
| 376 | List<MastershipEvent> events = new ArrayList<>(); |
| 377 | for (Entry<DeviceId, RoleValue> entry : roleMap.entrySet()) { |
| 378 | final DeviceId deviceId = entry.getKey(); |
| 379 | final RoleValue roleValue = entry.getValue(); |
| 380 | |
| 381 | if (roleValue.contains(MASTER, nodeId) || |
| 382 | roleValue.contains(STANDBY, nodeId)) { |
| 383 | |
Madan Jampani | f7536ab | 2015-05-07 23:23:23 -0700 | [diff] [blame] | 384 | relinquishRole(nodeId, deviceId).whenComplete((event, error) -> { |
| 385 | if (event != null) { |
| 386 | events.add(event); |
| 387 | } |
| 388 | }); |
HIGUCHI Yuta | 59f0229 | 2015-02-25 19:51:48 -0800 | [diff] [blame] | 389 | } |
| 390 | } |
| 391 | notifyDelegate(events); |
| 392 | } |
| 393 | |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 394 | // TODO: Consider moving this to RoleValue method |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 395 | //helper to fetch a new master candidate for a given device. |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 396 | private NodeId reelect( |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 397 | NodeId current, DeviceId deviceId, RoleValue rv) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 398 | |
| 399 | //if this is an queue it'd be neater. |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 400 | NodeId candidate = null; |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 401 | for (NodeId n : rv.nodesOfRole(STANDBY)) { |
| 402 | if (!current.equals(n)) { |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 403 | candidate = n; |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 404 | break; |
| 405 | } |
| 406 | } |
| 407 | |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 408 | if (candidate == null) { |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 409 | log.info("{} giving up and going to NONE for {}", current, deviceId); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 410 | rv.remove(MASTER, current); |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 411 | // master did change, but there is no master candidate. |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 412 | return null; |
| 413 | } else { |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 414 | log.info("{} trying to pass mastership for {} to {}", current, deviceId, candidate); |
| 415 | rv.replace(current, candidate, MASTER); |
| 416 | rv.reassign(candidate, STANDBY, NONE); |
| 417 | return candidate; |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 418 | } |
| 419 | } |
| 420 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 421 | //return the RoleValue structure for a device, or create one |
| 422 | private RoleValue getRoleValue(DeviceId deviceId) { |
| 423 | RoleValue value = roleMap.get(deviceId); |
| 424 | if (value == null) { |
| 425 | value = new RoleValue(); |
Ayaka Koshibe | a7384a8 | 2014-10-22 18:59:06 -0700 | [diff] [blame] | 426 | RoleValue concurrentlyAdded = roleMap.putIfAbsent(deviceId, value); |
| 427 | if (concurrentlyAdded != null) { |
| 428 | return concurrentlyAdded; |
| 429 | } |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 430 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 431 | return value; |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 432 | } |
| 433 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 434 | //get first applicable node out of store-unique structure. |
| 435 | private NodeId getNode(MastershipRole role, DeviceId deviceId) { |
| 436 | RoleValue value = roleMap.get(deviceId); |
| 437 | if (value != null) { |
| 438 | return value.get(role); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 439 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 440 | return null; |
| 441 | } |
| 442 | |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 443 | //adds or updates term information. |
Yuta HIGUCHI | b5b71b3 | 2014-10-30 02:41:25 -0700 | [diff] [blame] | 444 | // must be guarded by roleMap.lock(deviceId) |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 445 | private void updateTerm(DeviceId deviceId) { |
Yuta HIGUCHI | f1d159a | 2014-10-29 23:31:40 -0700 | [diff] [blame] | 446 | Integer term = terms.get(deviceId); |
| 447 | if (term == null) { |
| 448 | term = terms.putIfAbsent(deviceId, INIT); |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 449 | if (term == null) { |
Yuta HIGUCHI | f1d159a | 2014-10-29 23:31:40 -0700 | [diff] [blame] | 450 | // initial term set successfully |
| 451 | return; |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 452 | } |
Yuta HIGUCHI | f1d159a | 2014-10-29 23:31:40 -0700 | [diff] [blame] | 453 | // concurrent initialization detected, |
| 454 | // fall through to try incrementing |
| 455 | } |
| 456 | Integer nextTerm = term + 1; |
| 457 | boolean success = terms.replace(deviceId, term, nextTerm); |
| 458 | while (!success) { |
| 459 | term = terms.get(deviceId); |
| 460 | if (term == null) { |
| 461 | // something is very wrong, but write something to avoid |
| 462 | // infinite loop. |
| 463 | log.warn("Term info for {} disappeared.", deviceId); |
| 464 | term = putIfAbsent(terms, deviceId, nextTerm); |
| 465 | } |
| 466 | nextTerm = term + 1; |
| 467 | success = terms.replace(deviceId, term, nextTerm); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 468 | } |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 469 | } |
| 470 | |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 471 | private class RemoteMasterShipEventHandler implements EntryListener<DeviceId, RoleValue> { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 472 | |
| 473 | @Override |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 474 | public void entryAdded(EntryEvent<DeviceId, RoleValue> event) { |
Yuta HIGUCHI | eb5a0b9 | 2014-10-29 15:45:55 -0700 | [diff] [blame] | 475 | entryUpdated(event); |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 476 | } |
| 477 | |
| 478 | @Override |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 479 | public void entryRemoved(EntryEvent<DeviceId, RoleValue> event) { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 480 | } |
| 481 | |
| 482 | @Override |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 483 | public void entryUpdated(EntryEvent<DeviceId, RoleValue> event) { |
Ayaka Koshibe | 98bd12f | 2014-11-01 20:13:37 -0700 | [diff] [blame] | 484 | // compare old and current RoleValues. If master is different, |
| 485 | // emit MASTER_CHANGED. else, emit BACKUPS_CHANGED. |
| 486 | RoleValue oldValue = event.getOldValue(); |
| 487 | RoleValue newValue = event.getValue(); |
| 488 | |
Ayaka Koshibe | 15f4d60 | 2014-11-03 16:26:27 -0800 | [diff] [blame] | 489 | // There will be no oldValue at the very first instance of an EntryEvent. |
| 490 | // Technically, the progression is: null event -> null master -> some master; |
| 491 | // We say a null master and a null oldValue are the same condition. |
Yuta HIGUCHI | 780b138 | 2014-11-03 14:36:39 -0800 | [diff] [blame] | 492 | NodeId oldMaster = null; |
| 493 | if (oldValue != null) { |
| 494 | oldMaster = oldValue.get(MASTER); |
| 495 | } |
| 496 | NodeId newMaster = newValue.get(MASTER); |
| 497 | |
Ayaka Koshibe | 15f4d60 | 2014-11-03 16:26:27 -0800 | [diff] [blame] | 498 | if (!Objects.equal(oldMaster, newMaster)) { |
Ayaka Koshibe | 98bd12f | 2014-11-01 20:13:37 -0700 | [diff] [blame] | 499 | notifyDelegate(new MastershipEvent( |
| 500 | MASTER_CHANGED, event.getKey(), event.getValue().roleInfo())); |
| 501 | } else { |
| 502 | notifyDelegate(new MastershipEvent( |
| 503 | BACKUPS_CHANGED, event.getKey(), event.getValue().roleInfo())); |
| 504 | } |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 505 | } |
| 506 | |
| 507 | @Override |
| 508 | public void entryEvicted(EntryEvent<DeviceId, RoleValue> event) { |
| 509 | } |
| 510 | |
| 511 | @Override |
| 512 | public void mapEvicted(MapEvent event) { |
| 513 | } |
| 514 | |
| 515 | @Override |
| 516 | public void mapCleared(MapEvent event) { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 517 | } |
| 518 | } |
| 519 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 520 | } |