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 | */ |
Yuta HIGUCHI | 80912e6 | 2014-10-12 00:15:47 -0700 | [diff] [blame] | 16 | package org.onlab.onos.store.mastership.impl; |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 17 | |
Yuta HIGUCHI | 80912e6 | 2014-10-12 00:15:47 -0700 | [diff] [blame] | 18 | import static org.onlab.onos.mastership.MastershipEvent.Type.MASTER_CHANGED; |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 19 | |
| 20 | import java.util.Map; |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 21 | import java.util.Set; |
Yuta HIGUCHI | c8e19d4 | 2014-09-24 17:20:52 -0700 | [diff] [blame] | 22 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 23 | import org.apache.felix.scr.annotations.Activate; |
| 24 | import org.apache.felix.scr.annotations.Component; |
| 25 | import org.apache.felix.scr.annotations.Deactivate; |
| 26 | import org.apache.felix.scr.annotations.Reference; |
| 27 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 28 | import org.apache.felix.scr.annotations.Service; |
| 29 | import org.onlab.onos.cluster.ClusterService; |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 30 | import org.onlab.onos.cluster.NodeId; |
Ayaka Koshibe | abedb09 | 2014-10-20 17:01:31 -0700 | [diff] [blame] | 31 | import org.onlab.onos.cluster.RoleInfo; |
Yuta HIGUCHI | 80912e6 | 2014-10-12 00:15:47 -0700 | [diff] [blame] | 32 | import org.onlab.onos.mastership.MastershipEvent; |
| 33 | import org.onlab.onos.mastership.MastershipStore; |
| 34 | import org.onlab.onos.mastership.MastershipStoreDelegate; |
| 35 | import org.onlab.onos.mastership.MastershipTerm; |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 36 | import org.onlab.onos.net.DeviceId; |
| 37 | import org.onlab.onos.net.MastershipRole; |
Yuta HIGUCHI | 41f2ec0 | 2014-10-27 09:54:43 -0700 | [diff] [blame] | 38 | import org.onlab.onos.store.hz.AbstractHazelcastStore; |
| 39 | import org.onlab.onos.store.hz.SMap; |
Yuta HIGUCHI | 8d143d2 | 2014-10-19 23:15:09 -0700 | [diff] [blame] | 40 | import org.onlab.onos.store.serializers.KryoNamespaces; |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 41 | import org.onlab.onos.store.serializers.KryoSerializer; |
Yuta HIGUCHI | 8d143d2 | 2014-10-19 23:15:09 -0700 | [diff] [blame] | 42 | import org.onlab.util.KryoNamespace; |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 43 | |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 44 | import com.google.common.collect.ImmutableSet; |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 45 | import com.hazelcast.core.EntryEvent; |
| 46 | import com.hazelcast.core.EntryListener; |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 47 | import com.hazelcast.core.IAtomicLong; |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 48 | import com.hazelcast.core.MapEvent; |
Yuta HIGUCHI | 41f2ec0 | 2014-10-27 09:54:43 -0700 | [diff] [blame] | 49 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 50 | import static org.onlab.onos.net.MastershipRole.*; |
| 51 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 52 | /** |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 53 | * Distributed implementation of the mastership store. The store is |
| 54 | * responsible for the master selection process. |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 55 | */ |
| 56 | @Component(immediate = true) |
| 57 | @Service |
tom | 0755a36 | 2014-09-24 11:54:43 -0700 | [diff] [blame] | 58 | public class DistributedMastershipStore |
Yuta HIGUCHI | 2e96389 | 2014-09-27 13:00:39 -0700 | [diff] [blame] | 59 | extends AbstractHazelcastStore<MastershipEvent, MastershipStoreDelegate> |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 60 | implements MastershipStore { |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 61 | |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 62 | //initial term/TTL value |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 63 | private static final Integer INIT = 0; |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 64 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 65 | //device to node roles |
| 66 | protected SMap<DeviceId, RoleValue> roleMap; |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 67 | //devices to terms |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 68 | protected SMap<DeviceId, Integer> terms; |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 69 | //last-known cluster size, used for tie-breaking when partitioning occurs |
| 70 | protected IAtomicLong clusterSize; |
| 71 | |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 72 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 73 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 74 | protected ClusterService clusterService; |
| 75 | |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 76 | @Override |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 77 | @Activate |
| 78 | public void activate() { |
| 79 | super.activate(); |
| 80 | |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 81 | this.serializer = new KryoSerializer() { |
| 82 | @Override |
| 83 | protected void setupKryoPool() { |
Yuta HIGUCHI | 8d143d2 | 2014-10-19 23:15:09 -0700 | [diff] [blame] | 84 | serializerPool = KryoNamespace.newBuilder() |
| 85 | .register(KryoNamespaces.API) |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 86 | |
| 87 | .register(RoleValue.class, new RoleValueSerializer()) |
| 88 | .build() |
| 89 | .populate(1); |
| 90 | } |
| 91 | }; |
| 92 | |
Yuta HIGUCHI | 9def047 | 2014-10-23 15:51:10 -0700 | [diff] [blame] | 93 | roleMap = new SMap<>(theInstance.<byte[], byte[]>getMap("nodeRoles"), this.serializer); |
Ayaka Koshibe | 67af1f4 | 2014-10-20 15:26:37 -0700 | [diff] [blame] | 94 | roleMap.addEntryListener((new RemoteMasterShipEventHandler()), true); |
Yuta HIGUCHI | 9def047 | 2014-10-23 15:51:10 -0700 | [diff] [blame] | 95 | terms = new SMap<>(theInstance.<byte[], byte[]>getMap("terms"), this.serializer); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 96 | clusterSize = theInstance.getAtomicLong("clustersize"); |
Yuta HIGUCHI | c8e19d4 | 2014-09-24 17:20:52 -0700 | [diff] [blame] | 97 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 98 | log.info("Started"); |
| 99 | } |
| 100 | |
| 101 | @Deactivate |
| 102 | public void deactivate() { |
| 103 | log.info("Stopped"); |
| 104 | } |
| 105 | |
| 106 | @Override |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 107 | public MastershipRole getRole(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | a7384a8 | 2014-10-22 18:59:06 -0700 | [diff] [blame] | 108 | final RoleValue roleInfo = getRoleValue(deviceId); |
| 109 | if (roleInfo.contains(MASTER, nodeId)) { |
| 110 | return MASTER; |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 111 | } |
Ayaka Koshibe | a7384a8 | 2014-10-22 18:59:06 -0700 | [diff] [blame] | 112 | if (roleInfo.contains(STANDBY, nodeId)) { |
| 113 | return STANDBY; |
| 114 | } |
| 115 | return NONE; |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 116 | } |
| 117 | |
| 118 | @Override |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 119 | public MastershipEvent setMaster(NodeId nodeId, DeviceId deviceId) { |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 120 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 121 | MastershipRole role = getRole(nodeId, deviceId); |
| 122 | roleMap.lock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 123 | try { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 124 | RoleValue rv = getRoleValue(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 125 | switch (role) { |
| 126 | case MASTER: |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 127 | //reinforce mastership |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 128 | rv.reassign(nodeId, STANDBY, NONE); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 129 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 130 | return null; |
| 131 | case STANDBY: |
Ayaka Koshibe | a7384a8 | 2014-10-22 18:59:06 -0700 | [diff] [blame] | 132 | case NONE: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 133 | NodeId current = rv.get(MASTER); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 134 | if (current != null) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 135 | //backup and replace current master |
Ayaka Koshibe | a7384a8 | 2014-10-22 18:59:06 -0700 | [diff] [blame] | 136 | rv.reassign(current, NONE, STANDBY); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 137 | rv.replace(current, nodeId, MASTER); |
| 138 | } else { |
| 139 | //no master before so just add. |
| 140 | rv.add(MASTER, nodeId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 141 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 142 | rv.reassign(nodeId, STANDBY, NONE); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 143 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 144 | updateTerm(deviceId); |
Ayaka Koshibe | fc981cf | 2014-10-21 12:44:17 -0700 | [diff] [blame] | 145 | return new MastershipEvent(MASTER_CHANGED, deviceId, rv.roleInfo()); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 146 | default: |
| 147 | log.warn("unknown Mastership Role {}", role); |
| 148 | return null; |
| 149 | } |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 150 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 151 | roleMap.unlock(deviceId); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 152 | } |
| 153 | } |
| 154 | |
| 155 | @Override |
| 156 | public NodeId getMaster(DeviceId deviceId) { |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 157 | return getNode(MASTER, deviceId); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 158 | } |
| 159 | |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 160 | |
| 161 | @Override |
Ayaka Koshibe | abedb09 | 2014-10-20 17:01:31 -0700 | [diff] [blame] | 162 | public RoleInfo getNodes(DeviceId deviceId) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 163 | roleMap.lock(deviceId); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 164 | try { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 165 | RoleValue rv = getRoleValue(deviceId); |
Ayaka Koshibe | abedb09 | 2014-10-20 17:01:31 -0700 | [diff] [blame] | 166 | return rv.roleInfo(); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 167 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 168 | roleMap.unlock(deviceId); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 169 | } |
| 170 | } |
| 171 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 172 | @Override |
| 173 | public Set<DeviceId> getDevices(NodeId nodeId) { |
| 174 | ImmutableSet.Builder<DeviceId> builder = ImmutableSet.builder(); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 175 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 176 | for (Map.Entry<DeviceId, RoleValue> el : roleMap.entrySet()) { |
| 177 | if (nodeId.equals(el.getValue().get(MASTER))) { |
| 178 | builder.add(el.getKey()); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 179 | } |
| 180 | } |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 181 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 182 | return builder.build(); |
| 183 | } |
| 184 | |
| 185 | @Override |
| 186 | public MastershipRole requestRole(DeviceId deviceId) { |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 187 | NodeId local = clusterService.getLocalNode().id(); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 188 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 189 | roleMap.lock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 190 | try { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 191 | RoleValue rv = getRoleValue(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 192 | MastershipRole role = getRole(local, deviceId); |
| 193 | switch (role) { |
| 194 | case MASTER: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 195 | rv.reassign(local, STANDBY, NONE); |
Ayaka Koshibe | a7384a8 | 2014-10-22 18:59:06 -0700 | [diff] [blame] | 196 | terms.putIfAbsent(deviceId, INIT); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 197 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 198 | break; |
| 199 | case STANDBY: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 200 | rv.reassign(local, NONE, STANDBY); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 201 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 202 | terms.putIfAbsent(deviceId, INIT); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 203 | break; |
| 204 | case NONE: |
Ayaka Koshibe | a7384a8 | 2014-10-22 18:59:06 -0700 | [diff] [blame] | 205 | //either we're the first standby, or first to device. |
| 206 | //for latter, claim mastership. |
| 207 | if (rv.get(MASTER) == null) { |
| 208 | rv.add(MASTER, local); |
| 209 | rv.reassign(local, STANDBY, NONE); |
| 210 | updateTerm(deviceId); |
| 211 | role = MastershipRole.MASTER; |
| 212 | } else { |
| 213 | rv.add(STANDBY, local); |
| 214 | rv.reassign(local, NONE, STANDBY); |
| 215 | role = MastershipRole.STANDBY; |
| 216 | } |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 217 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 218 | break; |
| 219 | default: |
| 220 | log.warn("unknown Mastership Role {}", role); |
| 221 | } |
| 222 | return role; |
| 223 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 224 | roleMap.unlock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 225 | } |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 226 | } |
| 227 | |
| 228 | @Override |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 229 | public MastershipTerm getTermFor(DeviceId deviceId) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 230 | RoleValue rv = getRoleValue(deviceId); |
| 231 | if ((rv.get(MASTER) == null) || (terms.get(deviceId) == null)) { |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 232 | return null; |
| 233 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 234 | return MastershipTerm.of(rv.get(MASTER), terms.get(deviceId)); |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 235 | } |
| 236 | |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 237 | @Override |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 238 | public MastershipEvent setStandby(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 239 | MastershipEvent event = null; |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 240 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 241 | roleMap.lock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 242 | try { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 243 | RoleValue rv = getRoleValue(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 244 | MastershipRole role = getRole(nodeId, deviceId); |
| 245 | switch (role) { |
| 246 | case MASTER: |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 247 | event = reelect(nodeId, deviceId, rv); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 248 | //fall through to reinforce role |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 249 | case STANDBY: |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 250 | //fall through to reinforce role |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 251 | case NONE: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 252 | rv.reassign(nodeId, NONE, STANDBY); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 253 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 254 | break; |
| 255 | default: |
| 256 | log.warn("unknown Mastership Role {}", role); |
| 257 | } |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 258 | return event; |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 259 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 260 | roleMap.unlock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 261 | } |
| 262 | } |
| 263 | |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 264 | @Override |
| 265 | public MastershipEvent relinquishRole(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 266 | MastershipEvent event = null; |
Ayaka Koshibe | 25fd23a | 2014-10-03 15:50:43 -0700 | [diff] [blame] | 267 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 268 | roleMap.lock(deviceId); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 269 | try { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 270 | RoleValue rv = getRoleValue(deviceId); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 271 | MastershipRole role = getRole(nodeId, deviceId); |
| 272 | switch (role) { |
| 273 | case MASTER: |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 274 | event = reelect(nodeId, deviceId, rv); |
Ayaka Koshibe | e60d452 | 2014-10-28 15:07:00 -0700 | [diff] [blame] | 275 | if (event != null) { |
| 276 | Integer term = terms.get(deviceId); |
| 277 | terms.put(deviceId, ++term); |
| 278 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 279 | //fall through to reinforce relinquishment |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 280 | case STANDBY: |
| 281 | //fall through to reinforce relinquishment |
| 282 | case NONE: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 283 | rv.reassign(nodeId, STANDBY, NONE); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 284 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 285 | break; |
| 286 | default: |
| 287 | log.warn("unknown Mastership Role {}", role); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 288 | } |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 289 | return event; |
| 290 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 291 | roleMap.unlock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 292 | } |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 293 | } |
| 294 | |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 295 | //helper to fetch a new master candidate for a given device. |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 296 | private MastershipEvent reelect( |
| 297 | NodeId current, DeviceId deviceId, RoleValue rv) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 298 | |
| 299 | //if this is an queue it'd be neater. |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 300 | NodeId backup = null; |
| 301 | for (NodeId n : rv.nodesOfRole(STANDBY)) { |
| 302 | if (!current.equals(n)) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 303 | backup = n; |
| 304 | break; |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | if (backup == null) { |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 309 | log.info("{} giving up and going to NONE for {}", current, deviceId); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 310 | rv.remove(MASTER, current); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 311 | return null; |
| 312 | } else { |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 313 | log.info("{} trying to pass mastership for {} to {}", current, deviceId, backup); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 314 | rv.replace(current, backup, MASTER); |
| 315 | rv.reassign(backup, STANDBY, NONE); |
Ayaka Koshibe | fc981cf | 2014-10-21 12:44:17 -0700 | [diff] [blame] | 316 | return new MastershipEvent(MASTER_CHANGED, deviceId, rv.roleInfo()); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 317 | } |
| 318 | } |
| 319 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 320 | //return the RoleValue structure for a device, or create one |
| 321 | private RoleValue getRoleValue(DeviceId deviceId) { |
| 322 | RoleValue value = roleMap.get(deviceId); |
| 323 | if (value == null) { |
| 324 | value = new RoleValue(); |
Ayaka Koshibe | a7384a8 | 2014-10-22 18:59:06 -0700 | [diff] [blame] | 325 | RoleValue concurrentlyAdded = roleMap.putIfAbsent(deviceId, value); |
| 326 | if (concurrentlyAdded != null) { |
| 327 | return concurrentlyAdded; |
| 328 | } |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 329 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 330 | return value; |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 331 | } |
| 332 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 333 | //get first applicable node out of store-unique structure. |
| 334 | private NodeId getNode(MastershipRole role, DeviceId deviceId) { |
| 335 | RoleValue value = roleMap.get(deviceId); |
| 336 | if (value != null) { |
| 337 | return value.get(role); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 338 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 339 | return null; |
| 340 | } |
| 341 | |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 342 | //adds or updates term information. |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 343 | private void updateTerm(DeviceId deviceId) { |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 344 | terms.lock(deviceId); |
| 345 | try { |
| 346 | Integer term = terms.get(deviceId); |
| 347 | if (term == null) { |
| 348 | terms.put(deviceId, INIT); |
| 349 | } else { |
| 350 | terms.put(deviceId, ++term); |
| 351 | } |
| 352 | } finally { |
| 353 | terms.unlock(deviceId); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 354 | } |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 355 | } |
| 356 | |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 357 | private class RemoteMasterShipEventHandler implements EntryListener<DeviceId, RoleValue> { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 358 | |
| 359 | @Override |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 360 | public void entryAdded(EntryEvent<DeviceId, RoleValue> event) { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 361 | } |
| 362 | |
| 363 | @Override |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 364 | public void entryRemoved(EntryEvent<DeviceId, RoleValue> event) { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 365 | } |
| 366 | |
| 367 | @Override |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 368 | public void entryUpdated(EntryEvent<DeviceId, RoleValue> event) { |
Ayaka Koshibe | e60d452 | 2014-10-28 15:07:00 -0700 | [diff] [blame] | 369 | // this subsumes entryAdded event |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 370 | notifyDelegate(new MastershipEvent( |
Ayaka Koshibe | fc981cf | 2014-10-21 12:44:17 -0700 | [diff] [blame] | 371 | MASTER_CHANGED, event.getKey(), event.getValue().roleInfo())); |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 372 | } |
| 373 | |
| 374 | @Override |
| 375 | public void entryEvicted(EntryEvent<DeviceId, RoleValue> event) { |
| 376 | } |
| 377 | |
| 378 | @Override |
| 379 | public void mapEvicted(MapEvent event) { |
| 380 | } |
| 381 | |
| 382 | @Override |
| 383 | public void mapCleared(MapEvent event) { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 384 | } |
| 385 | } |
| 386 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 387 | } |