Yuta HIGUCHI | 80912e6 | 2014-10-12 00:15:47 -0700 | [diff] [blame] | 1 | package org.onlab.onos.store.mastership.impl; |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 2 | |
Yuta HIGUCHI | 80912e6 | 2014-10-12 00:15:47 -0700 | [diff] [blame] | 3 | import static org.onlab.onos.mastership.MastershipEvent.Type.MASTER_CHANGED; |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 4 | |
| 5 | import java.util.Map; |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 6 | import java.util.Set; |
Yuta HIGUCHI | c8e19d4 | 2014-09-24 17:20:52 -0700 | [diff] [blame] | 7 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 8 | import org.apache.felix.scr.annotations.Activate; |
| 9 | import org.apache.felix.scr.annotations.Component; |
| 10 | import org.apache.felix.scr.annotations.Deactivate; |
| 11 | import org.apache.felix.scr.annotations.Reference; |
| 12 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 13 | import org.apache.felix.scr.annotations.Service; |
| 14 | import org.onlab.onos.cluster.ClusterService; |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 15 | import org.onlab.onos.cluster.NodeId; |
Ayaka Koshibe | abedb09 | 2014-10-20 17:01:31 -0700 | [diff] [blame] | 16 | import org.onlab.onos.cluster.RoleInfo; |
Yuta HIGUCHI | 80912e6 | 2014-10-12 00:15:47 -0700 | [diff] [blame] | 17 | import org.onlab.onos.mastership.MastershipEvent; |
| 18 | import org.onlab.onos.mastership.MastershipStore; |
| 19 | import org.onlab.onos.mastership.MastershipStoreDelegate; |
| 20 | import org.onlab.onos.mastership.MastershipTerm; |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 21 | import org.onlab.onos.net.DeviceId; |
| 22 | import org.onlab.onos.net.MastershipRole; |
Yuta HIGUCHI | b5df76d | 2014-09-27 20:54:00 -0700 | [diff] [blame] | 23 | import org.onlab.onos.store.common.AbstractHazelcastStore; |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 24 | import org.onlab.onos.store.common.SMap; |
Yuta HIGUCHI | 8d143d2 | 2014-10-19 23:15:09 -0700 | [diff] [blame] | 25 | import org.onlab.onos.store.serializers.KryoNamespaces; |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 26 | import org.onlab.onos.store.serializers.KryoSerializer; |
Yuta HIGUCHI | 8d143d2 | 2014-10-19 23:15:09 -0700 | [diff] [blame] | 27 | import org.onlab.util.KryoNamespace; |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 28 | |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 29 | import com.google.common.collect.ImmutableSet; |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 30 | import com.hazelcast.core.EntryEvent; |
| 31 | import com.hazelcast.core.EntryListener; |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 32 | import com.hazelcast.core.IAtomicLong; |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 33 | import com.hazelcast.core.MapEvent; |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 34 | import static org.onlab.onos.net.MastershipRole.*; |
| 35 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 36 | /** |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 37 | * Distributed implementation of the mastership store. The store is |
| 38 | * responsible for the master selection process. |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 39 | */ |
| 40 | @Component(immediate = true) |
| 41 | @Service |
tom | 0755a36 | 2014-09-24 11:54:43 -0700 | [diff] [blame] | 42 | public class DistributedMastershipStore |
Yuta HIGUCHI | 2e96389 | 2014-09-27 13:00:39 -0700 | [diff] [blame] | 43 | extends AbstractHazelcastStore<MastershipEvent, MastershipStoreDelegate> |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 44 | implements MastershipStore { |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 45 | |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 46 | //initial term/TTL value |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 47 | private static final Integer INIT = 0; |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 48 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 49 | //device to node roles |
| 50 | protected SMap<DeviceId, RoleValue> roleMap; |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 51 | //devices to terms |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 52 | protected SMap<DeviceId, Integer> terms; |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 53 | //last-known cluster size, used for tie-breaking when partitioning occurs |
| 54 | protected IAtomicLong clusterSize; |
| 55 | |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 56 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 57 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 58 | protected ClusterService clusterService; |
| 59 | |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 60 | @Override |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 61 | @Activate |
| 62 | public void activate() { |
| 63 | super.activate(); |
| 64 | |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 65 | this.serializer = new KryoSerializer() { |
| 66 | @Override |
| 67 | protected void setupKryoPool() { |
Yuta HIGUCHI | 8d143d2 | 2014-10-19 23:15:09 -0700 | [diff] [blame] | 68 | serializerPool = KryoNamespace.newBuilder() |
| 69 | .register(KryoNamespaces.API) |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 70 | |
| 71 | .register(RoleValue.class, new RoleValueSerializer()) |
| 72 | .build() |
| 73 | .populate(1); |
| 74 | } |
| 75 | }; |
| 76 | |
Yuta HIGUCHI | 9def047 | 2014-10-23 15:51:10 -0700 | [diff] [blame] | 77 | roleMap = new SMap<>(theInstance.<byte[], byte[]>getMap("nodeRoles"), this.serializer); |
Ayaka Koshibe | 67af1f4 | 2014-10-20 15:26:37 -0700 | [diff] [blame] | 78 | roleMap.addEntryListener((new RemoteMasterShipEventHandler()), true); |
Yuta HIGUCHI | 9def047 | 2014-10-23 15:51:10 -0700 | [diff] [blame] | 79 | terms = new SMap<>(theInstance.<byte[], byte[]>getMap("terms"), this.serializer); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 80 | clusterSize = theInstance.getAtomicLong("clustersize"); |
Yuta HIGUCHI | c8e19d4 | 2014-09-24 17:20:52 -0700 | [diff] [blame] | 81 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 82 | log.info("Started"); |
| 83 | } |
| 84 | |
| 85 | @Deactivate |
| 86 | public void deactivate() { |
| 87 | log.info("Stopped"); |
| 88 | } |
| 89 | |
| 90 | @Override |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 91 | public MastershipRole getRole(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | a7384a8 | 2014-10-22 18:59:06 -0700 | [diff] [blame] | 92 | final RoleValue roleInfo = getRoleValue(deviceId); |
| 93 | if (roleInfo.contains(MASTER, nodeId)) { |
| 94 | return MASTER; |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 95 | } |
Ayaka Koshibe | a7384a8 | 2014-10-22 18:59:06 -0700 | [diff] [blame] | 96 | if (roleInfo.contains(STANDBY, nodeId)) { |
| 97 | return STANDBY; |
| 98 | } |
| 99 | return NONE; |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | @Override |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 103 | public MastershipEvent setMaster(NodeId nodeId, DeviceId deviceId) { |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 104 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 105 | MastershipRole role = getRole(nodeId, deviceId); |
| 106 | roleMap.lock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 107 | try { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 108 | RoleValue rv = getRoleValue(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 109 | switch (role) { |
| 110 | case MASTER: |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 111 | //reinforce mastership |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 112 | rv.reassign(nodeId, STANDBY, NONE); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 113 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 114 | return null; |
| 115 | case STANDBY: |
Ayaka Koshibe | a7384a8 | 2014-10-22 18:59:06 -0700 | [diff] [blame] | 116 | case NONE: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 117 | NodeId current = rv.get(MASTER); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 118 | if (current != null) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 119 | //backup and replace current master |
Ayaka Koshibe | a7384a8 | 2014-10-22 18:59:06 -0700 | [diff] [blame] | 120 | rv.reassign(current, NONE, STANDBY); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 121 | rv.replace(current, nodeId, MASTER); |
| 122 | } else { |
| 123 | //no master before so just add. |
| 124 | rv.add(MASTER, nodeId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 125 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 126 | rv.reassign(nodeId, STANDBY, NONE); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 127 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 128 | updateTerm(deviceId); |
Ayaka Koshibe | fc981cf | 2014-10-21 12:44:17 -0700 | [diff] [blame] | 129 | return new MastershipEvent(MASTER_CHANGED, deviceId, rv.roleInfo()); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 130 | default: |
| 131 | log.warn("unknown Mastership Role {}", role); |
| 132 | return null; |
| 133 | } |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 134 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 135 | roleMap.unlock(deviceId); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 136 | } |
| 137 | } |
| 138 | |
| 139 | @Override |
| 140 | public NodeId getMaster(DeviceId deviceId) { |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 141 | return getNode(MASTER, deviceId); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 142 | } |
| 143 | |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 144 | |
| 145 | @Override |
Ayaka Koshibe | abedb09 | 2014-10-20 17:01:31 -0700 | [diff] [blame] | 146 | public RoleInfo getNodes(DeviceId deviceId) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 147 | roleMap.lock(deviceId); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 148 | try { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 149 | RoleValue rv = getRoleValue(deviceId); |
Ayaka Koshibe | abedb09 | 2014-10-20 17:01:31 -0700 | [diff] [blame] | 150 | return rv.roleInfo(); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 151 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 152 | roleMap.unlock(deviceId); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 153 | } |
| 154 | } |
| 155 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 156 | @Override |
| 157 | public Set<DeviceId> getDevices(NodeId nodeId) { |
| 158 | ImmutableSet.Builder<DeviceId> builder = ImmutableSet.builder(); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 159 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 160 | for (Map.Entry<DeviceId, RoleValue> el : roleMap.entrySet()) { |
| 161 | if (nodeId.equals(el.getValue().get(MASTER))) { |
| 162 | builder.add(el.getKey()); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 163 | } |
| 164 | } |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 165 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 166 | return builder.build(); |
| 167 | } |
| 168 | |
| 169 | @Override |
| 170 | public MastershipRole requestRole(DeviceId deviceId) { |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 171 | NodeId local = clusterService.getLocalNode().id(); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 172 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 173 | roleMap.lock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 174 | try { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 175 | RoleValue rv = getRoleValue(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 176 | MastershipRole role = getRole(local, deviceId); |
| 177 | switch (role) { |
| 178 | case MASTER: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 179 | rv.reassign(local, STANDBY, NONE); |
Ayaka Koshibe | a7384a8 | 2014-10-22 18:59:06 -0700 | [diff] [blame] | 180 | terms.putIfAbsent(deviceId, INIT); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 181 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 182 | break; |
| 183 | case STANDBY: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 184 | rv.reassign(local, NONE, STANDBY); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 185 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 186 | terms.putIfAbsent(deviceId, INIT); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 187 | break; |
| 188 | case NONE: |
Ayaka Koshibe | a7384a8 | 2014-10-22 18:59:06 -0700 | [diff] [blame] | 189 | //either we're the first standby, or first to device. |
| 190 | //for latter, claim mastership. |
| 191 | if (rv.get(MASTER) == null) { |
| 192 | rv.add(MASTER, local); |
| 193 | rv.reassign(local, STANDBY, NONE); |
| 194 | updateTerm(deviceId); |
| 195 | role = MastershipRole.MASTER; |
| 196 | } else { |
| 197 | rv.add(STANDBY, local); |
| 198 | rv.reassign(local, NONE, STANDBY); |
| 199 | role = MastershipRole.STANDBY; |
| 200 | } |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 201 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 202 | break; |
| 203 | default: |
| 204 | log.warn("unknown Mastership Role {}", role); |
| 205 | } |
| 206 | return role; |
| 207 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 208 | roleMap.unlock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 209 | } |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 210 | } |
| 211 | |
| 212 | @Override |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 213 | public MastershipTerm getTermFor(DeviceId deviceId) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 214 | RoleValue rv = getRoleValue(deviceId); |
| 215 | if ((rv.get(MASTER) == null) || (terms.get(deviceId) == null)) { |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 216 | return null; |
| 217 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 218 | return MastershipTerm.of(rv.get(MASTER), terms.get(deviceId)); |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 219 | } |
| 220 | |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 221 | @Override |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 222 | public MastershipEvent setStandby(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 223 | MastershipEvent event = null; |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 224 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 225 | roleMap.lock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 226 | try { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 227 | RoleValue rv = getRoleValue(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 228 | MastershipRole role = getRole(nodeId, deviceId); |
| 229 | switch (role) { |
| 230 | case MASTER: |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 231 | event = reelect(nodeId, deviceId, rv); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 232 | //fall through to reinforce role |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 233 | case STANDBY: |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 234 | //fall through to reinforce role |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 235 | case NONE: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 236 | rv.reassign(nodeId, NONE, STANDBY); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 237 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 238 | break; |
| 239 | default: |
| 240 | log.warn("unknown Mastership Role {}", role); |
| 241 | } |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 242 | return event; |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 243 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 244 | roleMap.unlock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 245 | } |
| 246 | } |
| 247 | |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 248 | @Override |
| 249 | public MastershipEvent relinquishRole(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 250 | MastershipEvent event = null; |
Ayaka Koshibe | 25fd23a | 2014-10-03 15:50:43 -0700 | [diff] [blame] | 251 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 252 | roleMap.lock(deviceId); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 253 | try { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 254 | RoleValue rv = getRoleValue(deviceId); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 255 | MastershipRole role = getRole(nodeId, deviceId); |
| 256 | switch (role) { |
| 257 | case MASTER: |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 258 | event = reelect(nodeId, deviceId, rv); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 259 | //fall through to reinforce relinquishment |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 260 | case STANDBY: |
| 261 | //fall through to reinforce relinquishment |
| 262 | case NONE: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 263 | rv.reassign(nodeId, STANDBY, NONE); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 264 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 265 | break; |
| 266 | default: |
| 267 | log.warn("unknown Mastership Role {}", role); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 268 | } |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 269 | return event; |
| 270 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 271 | roleMap.unlock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 272 | } |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 273 | } |
| 274 | |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 275 | //helper to fetch a new master candidate for a given device. |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 276 | private MastershipEvent reelect( |
| 277 | NodeId current, DeviceId deviceId, RoleValue rv) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 278 | |
| 279 | //if this is an queue it'd be neater. |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 280 | NodeId backup = null; |
| 281 | for (NodeId n : rv.nodesOfRole(STANDBY)) { |
| 282 | if (!current.equals(n)) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 283 | backup = n; |
| 284 | break; |
| 285 | } |
| 286 | } |
| 287 | |
| 288 | if (backup == null) { |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 289 | log.info("{} giving up and going to NONE for {}", current, deviceId); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 290 | rv.remove(MASTER, current); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 291 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 292 | return null; |
| 293 | } else { |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 294 | log.info("{} trying to pass mastership for {} to {}", current, deviceId, backup); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 295 | rv.replace(current, backup, MASTER); |
| 296 | rv.reassign(backup, STANDBY, NONE); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame] | 297 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 298 | Integer term = terms.get(deviceId); |
| 299 | terms.put(deviceId, ++term); |
Ayaka Koshibe | fc981cf | 2014-10-21 12:44:17 -0700 | [diff] [blame] | 300 | return new MastershipEvent(MASTER_CHANGED, deviceId, rv.roleInfo()); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 301 | } |
| 302 | } |
| 303 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 304 | //return the RoleValue structure for a device, or create one |
| 305 | private RoleValue getRoleValue(DeviceId deviceId) { |
| 306 | RoleValue value = roleMap.get(deviceId); |
| 307 | if (value == null) { |
| 308 | value = new RoleValue(); |
Ayaka Koshibe | a7384a8 | 2014-10-22 18:59:06 -0700 | [diff] [blame] | 309 | RoleValue concurrentlyAdded = roleMap.putIfAbsent(deviceId, value); |
| 310 | if (concurrentlyAdded != null) { |
| 311 | return concurrentlyAdded; |
| 312 | } |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 313 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 314 | return value; |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 315 | } |
| 316 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 317 | //get first applicable node out of store-unique structure. |
| 318 | private NodeId getNode(MastershipRole role, DeviceId deviceId) { |
| 319 | RoleValue value = roleMap.get(deviceId); |
| 320 | if (value != null) { |
| 321 | return value.get(role); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 322 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 323 | return null; |
| 324 | } |
| 325 | |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 326 | //adds or updates term information. |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 327 | private void updateTerm(DeviceId deviceId) { |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 328 | terms.lock(deviceId); |
| 329 | try { |
| 330 | Integer term = terms.get(deviceId); |
| 331 | if (term == null) { |
| 332 | terms.put(deviceId, INIT); |
| 333 | } else { |
| 334 | terms.put(deviceId, ++term); |
| 335 | } |
| 336 | } finally { |
| 337 | terms.unlock(deviceId); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 338 | } |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 339 | } |
| 340 | |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 341 | private class RemoteMasterShipEventHandler implements EntryListener<DeviceId, RoleValue> { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 342 | |
| 343 | @Override |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 344 | public void entryAdded(EntryEvent<DeviceId, RoleValue> event) { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | @Override |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 348 | public void entryRemoved(EntryEvent<DeviceId, RoleValue> event) { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 349 | } |
| 350 | |
| 351 | @Override |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 352 | public void entryUpdated(EntryEvent<DeviceId, RoleValue> event) { |
Yuta HIGUCHI | 3195f55 | 2014-10-24 22:07:05 -0700 | [diff] [blame^] | 353 | |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 354 | notifyDelegate(new MastershipEvent( |
Ayaka Koshibe | fc981cf | 2014-10-21 12:44:17 -0700 | [diff] [blame] | 355 | MASTER_CHANGED, event.getKey(), event.getValue().roleInfo())); |
Ayaka Koshibe | b5c63a0 | 2014-10-18 18:42:27 -0700 | [diff] [blame] | 356 | } |
| 357 | |
| 358 | @Override |
| 359 | public void entryEvicted(EntryEvent<DeviceId, RoleValue> event) { |
| 360 | } |
| 361 | |
| 362 | @Override |
| 363 | public void mapEvicted(MapEvent event) { |
| 364 | } |
| 365 | |
| 366 | @Override |
| 367 | public void mapCleared(MapEvent event) { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 368 | } |
| 369 | } |
| 370 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 371 | } |