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; |
| 27 | import org.onlab.onos.store.serializers.KryoSerializer; |
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; |
| 30 | import com.hazelcast.core.IMap; |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 31 | import com.hazelcast.core.MultiMap; |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 32 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 33 | import static org.onlab.onos.net.MastershipRole.*; |
| 34 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 35 | /** |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 36 | * Distributed implementation of the mastership store. The store is |
| 37 | * responsible for the master selection process. |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 38 | */ |
| 39 | @Component(immediate = true) |
| 40 | @Service |
tom | 0755a36 | 2014-09-24 11:54:43 -0700 | [diff] [blame] | 41 | public class DistributedMastershipStore |
Yuta HIGUCHI | 2e96389 | 2014-09-27 13:00:39 -0700 | [diff] [blame] | 42 | extends AbstractHazelcastStore<MastershipEvent, MastershipStoreDelegate> |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 43 | implements MastershipStore { |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 44 | |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 45 | //initial term/TTL value |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 46 | private static final Integer INIT = 0; |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 47 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 48 | //device to node roles |
| 49 | protected SMap<DeviceId, RoleValue> roleMap; |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 50 | //devices to terms |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 51 | protected SMap<DeviceId, Integer> terms; |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 52 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 53 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 54 | protected ClusterService clusterService; |
| 55 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 56 | @SuppressWarnings({ "unchecked", "rawtypes" }) |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 57 | @Override |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 58 | @Activate |
| 59 | public void activate() { |
| 60 | super.activate(); |
| 61 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 62 | roleMap = new SMap(theInstance.getMap("nodeRoles"), new KryoSerializer()); |
| 63 | terms = new SMap(theInstance.getMap("terms"), new KryoSerializer()); |
| 64 | // roleMap.addEntryListener(new RemoteMasterShipEventHandler(), true); |
Yuta HIGUCHI | c8e19d4 | 2014-09-24 17:20:52 -0700 | [diff] [blame] | 65 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 66 | log.info("Started"); |
| 67 | } |
| 68 | |
| 69 | @Deactivate |
| 70 | public void deactivate() { |
| 71 | log.info("Stopped"); |
| 72 | } |
| 73 | |
| 74 | @Override |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 75 | public MastershipRole getRole(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 76 | NodeId current = getNode(MASTER, deviceId); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 77 | if (current == null) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 78 | if (isRole(STANDBY, nodeId, deviceId)) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 79 | //was previously standby, or set to standby from master |
| 80 | return MastershipRole.STANDBY; |
| 81 | } else { |
| 82 | return MastershipRole.NONE; |
| 83 | } |
| 84 | } else { |
| 85 | if (current.equals(nodeId)) { |
| 86 | //*should* be in unusable, not always |
| 87 | return MastershipRole.MASTER; |
| 88 | } else { |
| 89 | //may be in backups or unusable from earlier retirement |
| 90 | return MastershipRole.STANDBY; |
| 91 | } |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | @Override |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 96 | public MastershipEvent setMaster(NodeId nodeId, DeviceId deviceId) { |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 97 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 98 | MastershipRole role = getRole(nodeId, deviceId); |
| 99 | roleMap.lock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 100 | try { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 101 | RoleValue rv = getRoleValue(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 102 | switch (role) { |
| 103 | case MASTER: |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 104 | //reinforce mastership |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 105 | rv.reassign(nodeId, STANDBY, NONE); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 106 | return null; |
| 107 | case STANDBY: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 108 | NodeId current = rv.get(MASTER); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 109 | if (current != null) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 110 | //backup and replace current master |
| 111 | rv.reassign(nodeId, NONE, STANDBY); |
| 112 | rv.replace(current, nodeId, MASTER); |
| 113 | } else { |
| 114 | //no master before so just add. |
| 115 | rv.add(MASTER, nodeId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 116 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 117 | rv.reassign(nodeId, STANDBY, NONE); |
| 118 | updateTerm(deviceId); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 119 | return new MastershipEvent(MASTER_CHANGED, deviceId, nodeId); |
| 120 | case NONE: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 121 | rv.add(MASTER, nodeId); |
| 122 | rv.reassign(nodeId, STANDBY, NONE); |
| 123 | updateTerm(deviceId); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 124 | return new MastershipEvent(MASTER_CHANGED, deviceId, nodeId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 125 | default: |
| 126 | log.warn("unknown Mastership Role {}", role); |
| 127 | return null; |
| 128 | } |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 129 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 130 | roleMap.unlock(deviceId); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 131 | } |
| 132 | } |
| 133 | |
| 134 | @Override |
| 135 | public NodeId getMaster(DeviceId deviceId) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 136 | return getMaster(deviceId); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 137 | } |
| 138 | |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 139 | |
| 140 | @Override |
| 141 | public List<NodeId> getNodes(DeviceId deviceId) { |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 142 | List<NodeId> nodes = new LinkedList<>(); |
| 143 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 144 | //add current master to head - if there is one. |
| 145 | roleMap.lock(deviceId); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 146 | try { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 147 | RoleValue rv = getRoleValue(deviceId); |
| 148 | NodeId master = rv.get(MASTER); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 149 | if (master != null) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 150 | nodes.add(master); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 151 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 152 | //We ignore NONE nodes. |
| 153 | nodes.addAll(rv.nodesOfRole(STANDBY)); |
| 154 | return Collections.unmodifiableList(nodes); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 155 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 156 | roleMap.unlock(deviceId); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 157 | } |
| 158 | } |
| 159 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 160 | @Override |
| 161 | public Set<DeviceId> getDevices(NodeId nodeId) { |
| 162 | ImmutableSet.Builder<DeviceId> builder = ImmutableSet.builder(); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 163 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 164 | for (Map.Entry<DeviceId, RoleValue> el : roleMap.entrySet()) { |
| 165 | if (nodeId.equals(el.getValue().get(MASTER))) { |
| 166 | builder.add(el.getKey()); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 167 | } |
| 168 | } |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 169 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 170 | return builder.build(); |
| 171 | } |
| 172 | |
| 173 | @Override |
| 174 | public MastershipRole requestRole(DeviceId deviceId) { |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 175 | NodeId local = clusterService.getLocalNode().id(); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 176 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 177 | roleMap.lock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 178 | try { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 179 | RoleValue rv = getRoleValue(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 180 | MastershipRole role = getRole(local, deviceId); |
| 181 | switch (role) { |
| 182 | case MASTER: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 183 | rv.reassign(local, STANDBY, NONE); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 184 | break; |
| 185 | case STANDBY: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 186 | rv.reassign(local, NONE, STANDBY); |
| 187 | terms.putIfAbsent(deviceId, INIT); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 188 | break; |
| 189 | case NONE: |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 190 | //claim mastership |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 191 | rv.add(MASTER, local); |
| 192 | rv.reassign(local, STANDBY, NONE); |
| 193 | updateTerm(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 194 | role = MastershipRole.MASTER; |
| 195 | break; |
| 196 | default: |
| 197 | log.warn("unknown Mastership Role {}", role); |
| 198 | } |
| 199 | return role; |
| 200 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 201 | roleMap.unlock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 202 | } |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | @Override |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 206 | public MastershipTerm getTermFor(DeviceId deviceId) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 207 | RoleValue rv = getRoleValue(deviceId); |
| 208 | if ((rv.get(MASTER) == null) || (terms.get(deviceId) == null)) { |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 209 | return null; |
| 210 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 211 | return MastershipTerm.of(rv.get(MASTER), terms.get(deviceId)); |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 212 | } |
| 213 | |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 214 | @Override |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 215 | public MastershipEvent setStandby(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 216 | MastershipEvent event = null; |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 217 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 218 | roleMap.lock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 219 | try { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 220 | RoleValue rv = getRoleValue(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 221 | MastershipRole role = getRole(nodeId, deviceId); |
| 222 | switch (role) { |
| 223 | case MASTER: |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 224 | event = reelect(nodeId, deviceId); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 225 | //fall through to reinforce role |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 226 | case STANDBY: |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 227 | //fall through to reinforce role |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 228 | case NONE: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 229 | rv.reassign(nodeId, NONE, STANDBY); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 230 | break; |
| 231 | default: |
| 232 | log.warn("unknown Mastership Role {}", role); |
| 233 | } |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 234 | return event; |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 235 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 236 | roleMap.unlock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 237 | } |
| 238 | } |
| 239 | |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 240 | @Override |
| 241 | public MastershipEvent relinquishRole(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 242 | MastershipEvent event = null; |
Ayaka Koshibe | 25fd23a | 2014-10-03 15:50:43 -0700 | [diff] [blame] | 243 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 244 | roleMap.lock(deviceId); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 245 | try { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 246 | RoleValue rv = getRoleValue(deviceId); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 247 | MastershipRole role = getRole(nodeId, deviceId); |
| 248 | switch (role) { |
| 249 | case MASTER: |
| 250 | event = reelect(nodeId, deviceId); |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 251 | //fall through to reinforce relinquishment |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 252 | case STANDBY: |
| 253 | //fall through to reinforce relinquishment |
| 254 | case NONE: |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 255 | rv.reassign(nodeId, STANDBY, NONE); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 256 | break; |
| 257 | default: |
| 258 | log.warn("unknown Mastership Role {}", role); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 259 | } |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 260 | return event; |
| 261 | } finally { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 262 | roleMap.unlock(deviceId); |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 263 | } |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 264 | } |
| 265 | |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 266 | //helper to fetch a new master candidate for a given device. |
| 267 | private MastershipEvent reelect(NodeId current, DeviceId deviceId) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 268 | RoleValue rv = roleMap.get(deviceId); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 269 | |
| 270 | //if this is an queue it'd be neater. |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 271 | NodeId backup = null; |
| 272 | for (NodeId n : rv.nodesOfRole(STANDBY)) { |
| 273 | if (!current.equals(n)) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 274 | backup = n; |
| 275 | break; |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | if (backup == null) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 280 | rv.remove(MASTER, current); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 281 | return null; |
| 282 | } else { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 283 | rv.replace(current, backup, MASTER); |
| 284 | rv.reassign(backup, STANDBY, NONE); |
| 285 | Integer term = terms.get(deviceId); |
| 286 | terms.put(deviceId, ++term); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 287 | return new MastershipEvent( |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 288 | MASTER_CHANGED, deviceId, backup); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 289 | } |
| 290 | } |
| 291 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 292 | //return the RoleValue structure for a device, or create one |
| 293 | private RoleValue getRoleValue(DeviceId deviceId) { |
| 294 | RoleValue value = roleMap.get(deviceId); |
| 295 | if (value == null) { |
| 296 | value = new RoleValue(); |
| 297 | roleMap.put(deviceId, value); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 298 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 299 | return value; |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 300 | } |
| 301 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 302 | //get first applicable node out of store-unique structure. |
| 303 | private NodeId getNode(MastershipRole role, DeviceId deviceId) { |
| 304 | RoleValue value = roleMap.get(deviceId); |
| 305 | if (value != null) { |
| 306 | return value.get(role); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 307 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 308 | return null; |
| 309 | } |
| 310 | |
| 311 | //check if node is a certain role given a device |
| 312 | private boolean isRole( |
| 313 | MastershipRole role, NodeId nodeId, DeviceId deviceId) { |
| 314 | RoleValue value = roleMap.get(deviceId); |
| 315 | if (value != null) { |
| 316 | return value.contains(role, nodeId); |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 317 | } |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 318 | return false; |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 319 | } |
| 320 | |
| 321 | //adds or updates term information. |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame^] | 322 | private void updateTerm(DeviceId deviceId) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 323 | Integer term = terms.get(deviceId); |
| 324 | if (term == null) { |
| 325 | terms.put(deviceId, INIT); |
| 326 | } else { |
| 327 | terms.put(deviceId, ++term); |
| 328 | } |
Ayaka Koshibe | 8583ff3 | 2014-10-02 16:25:30 -0700 | [diff] [blame] | 329 | } |
| 330 | |
Ayaka Koshibe | 5c0f237 | 2014-10-02 17:59:04 -0700 | [diff] [blame] | 331 | private class RemoteMasterShipEventHandler extends RemoteEventHandler<DeviceId, NodeId> { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 332 | |
| 333 | @Override |
| 334 | protected void onAdd(DeviceId deviceId, NodeId nodeId) { |
| 335 | notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, nodeId)); |
| 336 | } |
| 337 | |
| 338 | @Override |
| 339 | protected void onRemove(DeviceId deviceId, NodeId nodeId) { |
Ayaka Koshibe | 5c0f237 | 2014-10-02 17:59:04 -0700 | [diff] [blame] | 340 | //notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, nodeId)); |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | @Override |
| 344 | protected void onUpdate(DeviceId deviceId, NodeId oldNodeId, NodeId nodeId) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 345 | //only addition indicates a change in mastership |
Ayaka Koshibe | 5c0f237 | 2014-10-02 17:59:04 -0700 | [diff] [blame] | 346 | //notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, nodeId)); |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 347 | } |
| 348 | } |
| 349 | |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 350 | } |