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 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 5 | import java.util.Collections; |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 6 | import java.util.LinkedList; |
| 7 | import java.util.List; |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 8 | import java.util.Map; |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 9 | import java.util.Set; |
Yuta HIGUCHI | c8e19d4 | 2014-09-24 17:20:52 -0700 | [diff] [blame] | 10 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 11 | import org.apache.felix.scr.annotations.Activate; |
| 12 | import org.apache.felix.scr.annotations.Component; |
| 13 | import org.apache.felix.scr.annotations.Deactivate; |
| 14 | import org.apache.felix.scr.annotations.Reference; |
| 15 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 16 | import org.apache.felix.scr.annotations.Service; |
| 17 | import org.onlab.onos.cluster.ClusterService; |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 18 | import org.onlab.onos.cluster.NodeId; |
Yuta HIGUCHI | 80912e6 | 2014-10-12 00:15:47 -0700 | [diff] [blame] | 19 | import org.onlab.onos.mastership.MastershipEvent; |
| 20 | import org.onlab.onos.mastership.MastershipStore; |
| 21 | import org.onlab.onos.mastership.MastershipStoreDelegate; |
| 22 | import org.onlab.onos.mastership.MastershipTerm; |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 23 | import org.onlab.onos.net.DeviceId; |
| 24 | import org.onlab.onos.net.MastershipRole; |
Yuta HIGUCHI | b5df76d | 2014-09-27 20:54:00 -0700 | [diff] [blame] | 25 | import org.onlab.onos.store.common.AbstractHazelcastStore; |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 26 | import org.onlab.onos.store.common.SMap; |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame^] | 27 | import org.onlab.onos.store.serializers.KryoPoolUtil; |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 28 | import org.onlab.onos.store.serializers.KryoSerializer; |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame^] | 29 | import org.onlab.util.KryoPool; |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 30 | |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 31 | import com.google.common.collect.ImmutableSet; |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame^] | 32 | import com.hazelcast.core.IAtomicLong; |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 33 | |
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 | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 60 | @SuppressWarnings({ "unchecked", "rawtypes" }) |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 61 | @Override |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 62 | @Activate |
| 63 | public void activate() { |
| 64 | super.activate(); |
| 65 | |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame^] | 66 | this.serializer = new KryoSerializer() { |
| 67 | @Override |
| 68 | protected void setupKryoPool() { |
| 69 | serializerPool = KryoPool.newBuilder() |
| 70 | .register(KryoPoolUtil.API) |
| 71 | |
| 72 | .register(RoleValue.class, new RoleValueSerializer()) |
| 73 | .build() |
| 74 | .populate(1); |
| 75 | } |
| 76 | }; |
| 77 | |
| 78 | roleMap = new SMap(theInstance.getMap("nodeRoles"), this.serializer); |
| 79 | terms = new SMap(theInstance.getMap("terms"), this.serializer); |
| 80 | clusterSize = theInstance.getAtomicLong("clustersize"); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 81 | // roleMap.addEntryListener(new RemoteMasterShipEventHandler(), true); |
Yuta HIGUCHI | c8e19d4 | 2014-09-24 17:20:52 -0700 | [diff] [blame] | 82 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 83 | log.info("Started"); |
| 84 | } |
| 85 | |
| 86 | @Deactivate |
| 87 | public void deactivate() { |
| 88 | log.info("Stopped"); |
| 89 | } |
| 90 | |
| 91 | @Override |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 92 | public MastershipRole getRole(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 93 | NodeId current = getNode(MASTER, deviceId); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 94 | if (current == null) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 95 | if (isRole(STANDBY, nodeId, deviceId)) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 96 | //was previously standby, or set to standby from master |
| 97 | return MastershipRole.STANDBY; |
| 98 | } else { |
| 99 | return MastershipRole.NONE; |
| 100 | } |
| 101 | } else { |
| 102 | if (current.equals(nodeId)) { |
| 103 | //*should* be in unusable, not always |
| 104 | return MastershipRole.MASTER; |
| 105 | } else { |
| 106 | //may be in backups or unusable from earlier retirement |
| 107 | return MastershipRole.STANDBY; |
| 108 | } |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | @Override |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 113 | public MastershipEvent setMaster(NodeId nodeId, DeviceId deviceId) { |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 114 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 115 | MastershipRole role = getRole(nodeId, deviceId); |
| 116 | roleMap.lock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 117 | try { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 118 | RoleValue rv = getRoleValue(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 119 | switch (role) { |
| 120 | case MASTER: |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 121 | //reinforce mastership |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 122 | rv.reassign(nodeId, STANDBY, NONE); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame^] | 123 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 124 | return null; |
| 125 | case STANDBY: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 126 | NodeId current = rv.get(MASTER); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 127 | if (current != null) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 128 | //backup and replace current master |
| 129 | rv.reassign(nodeId, NONE, STANDBY); |
| 130 | rv.replace(current, nodeId, MASTER); |
| 131 | } else { |
| 132 | //no master before so just add. |
| 133 | rv.add(MASTER, nodeId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 134 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 135 | rv.reassign(nodeId, STANDBY, NONE); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame^] | 136 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 137 | updateTerm(deviceId); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 138 | return new MastershipEvent(MASTER_CHANGED, deviceId, nodeId); |
| 139 | case NONE: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 140 | rv.add(MASTER, nodeId); |
| 141 | rv.reassign(nodeId, STANDBY, NONE); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame^] | 142 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 143 | updateTerm(deviceId); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 144 | return new MastershipEvent(MASTER_CHANGED, deviceId, nodeId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 145 | default: |
| 146 | log.warn("unknown Mastership Role {}", role); |
| 147 | return null; |
| 148 | } |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 149 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 150 | roleMap.unlock(deviceId); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 151 | } |
| 152 | } |
| 153 | |
| 154 | @Override |
| 155 | public NodeId getMaster(DeviceId deviceId) { |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame^] | 156 | return getNode(MASTER, deviceId); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 157 | } |
| 158 | |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 159 | |
| 160 | @Override |
| 161 | public List<NodeId> getNodes(DeviceId deviceId) { |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 162 | List<NodeId> nodes = new LinkedList<>(); |
| 163 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 164 | //add current master to head - if there is one. |
| 165 | roleMap.lock(deviceId); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 166 | try { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 167 | RoleValue rv = getRoleValue(deviceId); |
| 168 | NodeId master = rv.get(MASTER); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 169 | if (master != null) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 170 | nodes.add(master); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 171 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 172 | //We ignore NONE nodes. |
| 173 | nodes.addAll(rv.nodesOfRole(STANDBY)); |
| 174 | return Collections.unmodifiableList(nodes); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 175 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 176 | roleMap.unlock(deviceId); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 177 | } |
| 178 | } |
| 179 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 180 | @Override |
| 181 | public Set<DeviceId> getDevices(NodeId nodeId) { |
| 182 | ImmutableSet.Builder<DeviceId> builder = ImmutableSet.builder(); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 183 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 184 | for (Map.Entry<DeviceId, RoleValue> el : roleMap.entrySet()) { |
| 185 | if (nodeId.equals(el.getValue().get(MASTER))) { |
| 186 | builder.add(el.getKey()); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 187 | } |
| 188 | } |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 189 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 190 | return builder.build(); |
| 191 | } |
| 192 | |
| 193 | @Override |
| 194 | public MastershipRole requestRole(DeviceId deviceId) { |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 195 | NodeId local = clusterService.getLocalNode().id(); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 196 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 197 | roleMap.lock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 198 | try { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 199 | RoleValue rv = getRoleValue(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 200 | MastershipRole role = getRole(local, deviceId); |
| 201 | switch (role) { |
| 202 | case MASTER: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 203 | rv.reassign(local, STANDBY, NONE); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame^] | 204 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 205 | break; |
| 206 | case STANDBY: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 207 | rv.reassign(local, NONE, STANDBY); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame^] | 208 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 209 | terms.putIfAbsent(deviceId, INIT); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 210 | break; |
| 211 | case NONE: |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 212 | //claim mastership |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 213 | rv.add(MASTER, local); |
| 214 | rv.reassign(local, STANDBY, NONE); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame^] | 215 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 216 | updateTerm(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 217 | role = MastershipRole.MASTER; |
| 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 | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 275 | //fall through to reinforce relinquishment |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 276 | case STANDBY: |
| 277 | //fall through to reinforce relinquishment |
| 278 | case NONE: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 279 | rv.reassign(nodeId, STANDBY, NONE); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame^] | 280 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 281 | break; |
| 282 | default: |
| 283 | log.warn("unknown Mastership Role {}", role); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 284 | } |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 285 | return event; |
| 286 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 287 | roleMap.unlock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 288 | } |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 289 | } |
| 290 | |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 291 | //helper to fetch a new master candidate for a given device. |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame^] | 292 | private MastershipEvent reelect(NodeId current, DeviceId deviceId, RoleValue rv) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 293 | |
| 294 | //if this is an queue it'd be neater. |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 295 | NodeId backup = null; |
| 296 | for (NodeId n : rv.nodesOfRole(STANDBY)) { |
| 297 | if (!current.equals(n)) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 298 | backup = n; |
| 299 | break; |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | if (backup == null) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 304 | rv.remove(MASTER, current); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame^] | 305 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 306 | return null; |
| 307 | } else { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 308 | rv.replace(current, backup, MASTER); |
| 309 | rv.reassign(backup, STANDBY, NONE); |
Ayaka Koshibe | e8e4535 | 2014-10-16 00:37:19 -0700 | [diff] [blame^] | 310 | roleMap.put(deviceId, rv); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 311 | Integer term = terms.get(deviceId); |
| 312 | terms.put(deviceId, ++term); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 313 | return new MastershipEvent( |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 314 | MASTER_CHANGED, deviceId, backup); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 315 | } |
| 316 | } |
| 317 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 318 | //return the RoleValue structure for a device, or create one |
| 319 | private RoleValue getRoleValue(DeviceId deviceId) { |
| 320 | RoleValue value = roleMap.get(deviceId); |
| 321 | if (value == null) { |
| 322 | value = new RoleValue(); |
| 323 | roleMap.put(deviceId, value); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 324 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 325 | return value; |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 326 | } |
| 327 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 328 | //get first applicable node out of store-unique structure. |
| 329 | private NodeId getNode(MastershipRole role, DeviceId deviceId) { |
| 330 | RoleValue value = roleMap.get(deviceId); |
| 331 | if (value != null) { |
| 332 | return value.get(role); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 333 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 334 | return null; |
| 335 | } |
| 336 | |
| 337 | //check if node is a certain role given a device |
| 338 | private boolean isRole( |
| 339 | MastershipRole role, NodeId nodeId, DeviceId deviceId) { |
| 340 | RoleValue value = roleMap.get(deviceId); |
| 341 | if (value != null) { |
| 342 | return value.contains(role, nodeId); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 343 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 344 | return false; |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | //adds or updates term information. |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 348 | private void updateTerm(DeviceId deviceId) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 349 | Integer term = terms.get(deviceId); |
| 350 | if (term == null) { |
| 351 | terms.put(deviceId, INIT); |
| 352 | } else { |
| 353 | terms.put(deviceId, ++term); |
| 354 | } |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 355 | } |
| 356 | |
Ayaka Koshibe | 5c0f237 | 2014-10-02 17:59:04 -0700 | [diff] [blame] | 357 | private class RemoteMasterShipEventHandler extends RemoteEventHandler<DeviceId, NodeId> { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 358 | |
| 359 | @Override |
| 360 | protected void onAdd(DeviceId deviceId, NodeId nodeId) { |
| 361 | notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, nodeId)); |
| 362 | } |
| 363 | |
| 364 | @Override |
| 365 | protected void onRemove(DeviceId deviceId, NodeId nodeId) { |
Ayaka Koshibe | 5c0f237 | 2014-10-02 17:59:04 -0700 | [diff] [blame] | 366 | //notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, nodeId)); |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 367 | } |
| 368 | |
| 369 | @Override |
| 370 | protected void onUpdate(DeviceId deviceId, NodeId oldNodeId, NodeId nodeId) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 371 | //only addition indicates a change in mastership |
Ayaka Koshibe | 5c0f237 | 2014-10-02 17:59:04 -0700 | [diff] [blame] | 372 | //notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, nodeId)); |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 373 | } |
| 374 | } |
| 375 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 376 | } |