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 | */ |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 16 | package org.onosproject.cluster.impl; |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 17 | |
Thomas Vachuska | 1e68bdd | 2014-11-29 13:53:10 -0800 | [diff] [blame] | 18 | import com.codahale.metrics.Timer; |
| 19 | import com.codahale.metrics.Timer.Context; |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 20 | import org.apache.felix.scr.annotations.Activate; |
tom | 4a5d171 | 2014-09-23 17:49:39 -0700 | [diff] [blame] | 21 | import org.apache.felix.scr.annotations.Component; |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 22 | import org.apache.felix.scr.annotations.Deactivate; |
| 23 | import org.apache.felix.scr.annotations.Reference; |
| 24 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
tom | 4a5d171 | 2014-09-23 17:49:39 -0700 | [diff] [blame] | 25 | import org.apache.felix.scr.annotations.Service; |
Yuta HIGUCHI | 6a46283 | 2014-11-23 23:56:03 -0800 | [diff] [blame] | 26 | import org.onlab.metrics.MetricsService; |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 27 | import org.onosproject.cluster.ClusterEvent; |
| 28 | import org.onosproject.cluster.ClusterEventListener; |
| 29 | import org.onosproject.cluster.ClusterService; |
| 30 | import org.onosproject.cluster.ControllerNode; |
| 31 | import org.onosproject.cluster.NodeId; |
| 32 | import org.onosproject.cluster.RoleInfo; |
| 33 | import org.onosproject.core.MetricsHelper; |
| 34 | import org.onosproject.event.AbstractListenerRegistry; |
| 35 | import org.onosproject.event.EventDeliveryService; |
| 36 | import org.onosproject.mastership.MastershipAdminService; |
| 37 | import org.onosproject.mastership.MastershipEvent; |
| 38 | import org.onosproject.mastership.MastershipListener; |
| 39 | import org.onosproject.mastership.MastershipService; |
| 40 | import org.onosproject.mastership.MastershipStore; |
| 41 | import org.onosproject.mastership.MastershipStoreDelegate; |
| 42 | import org.onosproject.mastership.MastershipTerm; |
| 43 | import org.onosproject.mastership.MastershipTermService; |
| 44 | import org.onosproject.net.DeviceId; |
| 45 | import org.onosproject.net.MastershipRole; |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 46 | import org.slf4j.Logger; |
| 47 | |
Thomas Vachuska | 1e68bdd | 2014-11-29 13:53:10 -0800 | [diff] [blame] | 48 | import java.util.Collection; |
Thomas Vachuska | 12dfdc3 | 2014-11-29 16:03:12 -0800 | [diff] [blame] | 49 | import java.util.HashMap; |
| 50 | import java.util.HashSet; |
Thomas Vachuska | 1e68bdd | 2014-11-29 13:53:10 -0800 | [diff] [blame] | 51 | import java.util.Iterator; |
| 52 | import java.util.List; |
Thomas Vachuska | 12dfdc3 | 2014-11-29 16:03:12 -0800 | [diff] [blame] | 53 | import java.util.Map; |
Thomas Vachuska | 1e68bdd | 2014-11-29 13:53:10 -0800 | [diff] [blame] | 54 | import java.util.Set; |
| 55 | import java.util.concurrent.atomic.AtomicInteger; |
| 56 | |
| 57 | import static com.google.common.base.Preconditions.checkNotNull; |
| 58 | import static com.google.common.collect.Lists.newArrayList; |
| 59 | import static org.onlab.metrics.MetricsUtil.startTimer; |
| 60 | import static org.onlab.metrics.MetricsUtil.stopTimer; |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 61 | import static org.onosproject.cluster.ControllerNode.State.ACTIVE; |
| 62 | import static org.onosproject.net.MastershipRole.MASTER; |
Thomas Vachuska | 1e68bdd | 2014-11-29 13:53:10 -0800 | [diff] [blame] | 63 | import static org.slf4j.LoggerFactory.getLogger; |
Yuta HIGUCHI | 6a46283 | 2014-11-23 23:56:03 -0800 | [diff] [blame] | 64 | |
tom | 4a5d171 | 2014-09-23 17:49:39 -0700 | [diff] [blame] | 65 | @Component(immediate = true) |
| 66 | @Service |
Ayaka Koshibe | 3eed2b0 | 2014-09-23 13:28:05 -0700 | [diff] [blame] | 67 | public class MastershipManager |
Yuta HIGUCHI | a22f69f | 2014-11-24 22:25:17 -0800 | [diff] [blame] | 68 | implements MastershipService, MastershipAdminService, MastershipTermService, |
| 69 | MetricsHelper { |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 70 | |
| 71 | private static final String NODE_ID_NULL = "Node ID cannot be null"; |
| 72 | private static final String DEVICE_ID_NULL = "Device ID cannot be null"; |
| 73 | private static final String ROLE_NULL = "Mastership role cannot be null"; |
| 74 | |
| 75 | private final Logger log = getLogger(getClass()); |
| 76 | |
| 77 | protected final AbstractListenerRegistry<MastershipEvent, MastershipListener> |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 78 | listenerRegistry = new AbstractListenerRegistry<>(); |
| 79 | |
| 80 | private final MastershipStoreDelegate delegate = new InternalDelegate(); |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 81 | |
| 82 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 83 | protected MastershipStore store; |
| 84 | |
| 85 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 86 | protected EventDeliveryService eventDispatcher; |
| 87 | |
| 88 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
tom | 4a5d171 | 2014-09-23 17:49:39 -0700 | [diff] [blame] | 89 | protected ClusterService clusterService; |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 90 | |
Yuta HIGUCHI | 6a46283 | 2014-11-23 23:56:03 -0800 | [diff] [blame] | 91 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 92 | protected MetricsService metricsService; |
| 93 | |
Ayaka Koshibe | 3de43ca | 2014-09-26 16:40:23 -0700 | [diff] [blame] | 94 | private ClusterEventListener clusterListener = new InternalClusterEventListener(); |
Yuta HIGUCHI | 6a46283 | 2014-11-23 23:56:03 -0800 | [diff] [blame] | 95 | private Timer requestRoleTimer; |
Ayaka Koshibe | 3de43ca | 2014-09-26 16:40:23 -0700 | [diff] [blame] | 96 | |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 97 | @Activate |
| 98 | public void activate() { |
Yuta HIGUCHI | 6a46283 | 2014-11-23 23:56:03 -0800 | [diff] [blame] | 99 | requestRoleTimer = createTimer("Mastership", "requestRole", "responseTime"); |
| 100 | |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 101 | eventDispatcher.addSink(MastershipEvent.class, listenerRegistry); |
Ayaka Koshibe | 3de43ca | 2014-09-26 16:40:23 -0700 | [diff] [blame] | 102 | clusterService.addListener(clusterListener); |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 103 | store.setDelegate(delegate); |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 104 | log.info("Started"); |
| 105 | } |
| 106 | |
| 107 | @Deactivate |
| 108 | public void deactivate() { |
| 109 | eventDispatcher.removeSink(MastershipEvent.class); |
Ayaka Koshibe | 3de43ca | 2014-09-26 16:40:23 -0700 | [diff] [blame] | 110 | clusterService.removeListener(clusterListener); |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 111 | store.unsetDelegate(delegate); |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 112 | log.info("Stopped"); |
| 113 | } |
| 114 | |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 115 | @Override |
| 116 | public void setRole(NodeId nodeId, DeviceId deviceId, MastershipRole role) { |
| 117 | checkNotNull(nodeId, NODE_ID_NULL); |
| 118 | checkNotNull(deviceId, DEVICE_ID_NULL); |
| 119 | checkNotNull(role, ROLE_NULL); |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 120 | |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 121 | MastershipEvent event = null; |
Ayaka Koshibe | e60d452 | 2014-10-28 15:07:00 -0700 | [diff] [blame] | 122 | |
| 123 | switch (role) { |
| 124 | case MASTER: |
| 125 | event = store.setMaster(nodeId, deviceId); |
| 126 | break; |
| 127 | case STANDBY: |
| 128 | event = store.setStandby(nodeId, deviceId); |
| 129 | break; |
| 130 | case NONE: |
| 131 | event = store.relinquishRole(nodeId, deviceId); |
| 132 | break; |
| 133 | default: |
| 134 | log.info("Unknown role; ignoring"); |
| 135 | return; |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 136 | } |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 137 | |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 138 | if (event != null) { |
| 139 | post(event); |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 140 | } |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 141 | } |
| 142 | |
| 143 | @Override |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 144 | public MastershipRole getLocalRole(DeviceId deviceId) { |
| 145 | checkNotNull(deviceId, DEVICE_ID_NULL); |
| 146 | return store.getRole(clusterService.getLocalNode().id(), deviceId); |
| 147 | } |
| 148 | |
| 149 | @Override |
| 150 | public void relinquishMastership(DeviceId deviceId) { |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 151 | MastershipEvent event = null; |
Ayaka Koshibe | 1c292d7 | 2014-10-08 17:46:07 -0700 | [diff] [blame] | 152 | event = store.relinquishRole( |
| 153 | clusterService.getLocalNode().id(), deviceId); |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 154 | if (event != null) { |
| 155 | post(event); |
| 156 | } |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 157 | } |
| 158 | |
| 159 | @Override |
| 160 | public MastershipRole requestRoleFor(DeviceId deviceId) { |
| 161 | checkNotNull(deviceId, DEVICE_ID_NULL); |
Yuta HIGUCHI | 6a46283 | 2014-11-23 23:56:03 -0800 | [diff] [blame] | 162 | final Context timer = startTimer(requestRoleTimer); |
| 163 | try { |
| 164 | return store.requestRole(deviceId); |
| 165 | } finally { |
| 166 | stopTimer(timer); |
| 167 | } |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | @Override |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 171 | public NodeId getMasterFor(DeviceId deviceId) { |
| 172 | checkNotNull(deviceId, DEVICE_ID_NULL); |
| 173 | return store.getMaster(deviceId); |
| 174 | } |
| 175 | |
| 176 | @Override |
| 177 | public Set<DeviceId> getDevicesOf(NodeId nodeId) { |
| 178 | checkNotNull(nodeId, NODE_ID_NULL); |
| 179 | return store.getDevices(nodeId); |
| 180 | } |
| 181 | |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 182 | @Override |
Ayaka Koshibe | abedb09 | 2014-10-20 17:01:31 -0700 | [diff] [blame] | 183 | public RoleInfo getNodesFor(DeviceId deviceId) { |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 184 | checkNotNull(deviceId, DEVICE_ID_NULL); |
| 185 | return store.getNodes(deviceId); |
| 186 | } |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 187 | |
| 188 | @Override |
Yuta HIGUCHI | bcac499 | 2014-11-22 19:27:57 -0800 | [diff] [blame] | 189 | public MastershipTerm getMastershipTerm(DeviceId deviceId) { |
| 190 | return store.getTermFor(deviceId); |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 191 | } |
| 192 | |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 193 | @Override |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 194 | public void addListener(MastershipListener listener) { |
| 195 | checkNotNull(listener); |
| 196 | listenerRegistry.addListener(listener); |
| 197 | } |
| 198 | |
| 199 | @Override |
| 200 | public void removeListener(MastershipListener listener) { |
| 201 | checkNotNull(listener); |
| 202 | listenerRegistry.removeListener(listener); |
| 203 | } |
| 204 | |
Yuta HIGUCHI | a22f69f | 2014-11-24 22:25:17 -0800 | [diff] [blame] | 205 | @Override |
| 206 | public MetricsService metricsService() { |
| 207 | return metricsService; |
| 208 | } |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 209 | |
Thomas Vachuska | 1e68bdd | 2014-11-29 13:53:10 -0800 | [diff] [blame] | 210 | @Override |
| 211 | public void balanceRoles() { |
| 212 | List<ControllerNode> nodes = newArrayList(clusterService.getNodes()); |
Thomas Vachuska | 12dfdc3 | 2014-11-29 16:03:12 -0800 | [diff] [blame] | 213 | Map<ControllerNode, Set<DeviceId>> controllerDevices = new HashMap<>(); |
Thomas Vachuska | 1e68bdd | 2014-11-29 13:53:10 -0800 | [diff] [blame] | 214 | int deviceCount = 0; |
| 215 | |
| 216 | // Create buckets reflecting current ownership. |
| 217 | for (ControllerNode node : nodes) { |
Thomas Vachuska | 12dfdc3 | 2014-11-29 16:03:12 -0800 | [diff] [blame] | 218 | if (clusterService.getState(node.id()) == ACTIVE) { |
| 219 | Set<DeviceId> devicesOf = new HashSet<>(getDevicesOf(node.id())); |
| 220 | deviceCount += devicesOf.size(); |
| 221 | controllerDevices.put(node, devicesOf); |
| 222 | log.info("Node {} has {} devices.", node.id(), devicesOf.size()); |
| 223 | } |
Thomas Vachuska | 1e68bdd | 2014-11-29 13:53:10 -0800 | [diff] [blame] | 224 | } |
| 225 | |
Thomas Vachuska | 12dfdc3 | 2014-11-29 16:03:12 -0800 | [diff] [blame] | 226 | // Now re-balance the buckets until they are roughly even. |
| 227 | int rounds = controllerDevices.keySet().size(); |
Thomas Vachuska | 1e68bdd | 2014-11-29 13:53:10 -0800 | [diff] [blame] | 228 | for (int i = 0; i < rounds; i++) { |
| 229 | // Iterate over the buckets and find the smallest and the largest. |
Thomas Vachuska | 12dfdc3 | 2014-11-29 16:03:12 -0800 | [diff] [blame] | 230 | ControllerNode smallest = findBucket(true, controllerDevices); |
| 231 | ControllerNode largest = findBucket(false, controllerDevices); |
Thomas Vachuska | 1e68bdd | 2014-11-29 13:53:10 -0800 | [diff] [blame] | 232 | balanceBuckets(smallest, largest, controllerDevices, deviceCount); |
| 233 | } |
| 234 | } |
| 235 | |
Thomas Vachuska | 12dfdc3 | 2014-11-29 16:03:12 -0800 | [diff] [blame] | 236 | private ControllerNode findBucket(boolean min, |
| 237 | Map<ControllerNode, Set<DeviceId>> controllerDevices) { |
Thomas Vachuska | 1e68bdd | 2014-11-29 13:53:10 -0800 | [diff] [blame] | 238 | int xSize = min ? Integer.MAX_VALUE : -1; |
| 239 | ControllerNode xNode = null; |
Thomas Vachuska | 12dfdc3 | 2014-11-29 16:03:12 -0800 | [diff] [blame] | 240 | for (ControllerNode node : controllerDevices.keySet()) { |
Thomas Vachuska | 1e68bdd | 2014-11-29 13:53:10 -0800 | [diff] [blame] | 241 | int size = controllerDevices.get(node).size(); |
| 242 | if ((min && size < xSize) || (!min && size > xSize)) { |
| 243 | xSize = size; |
| 244 | xNode = node; |
| 245 | } |
| 246 | } |
| 247 | return xNode; |
| 248 | } |
| 249 | |
| 250 | private void balanceBuckets(ControllerNode smallest, ControllerNode largest, |
Thomas Vachuska | 12dfdc3 | 2014-11-29 16:03:12 -0800 | [diff] [blame] | 251 | Map<ControllerNode, Set<DeviceId>> controllerDevices, |
Thomas Vachuska | 1e68bdd | 2014-11-29 13:53:10 -0800 | [diff] [blame] | 252 | int deviceCount) { |
| 253 | Collection<DeviceId> minBucket = controllerDevices.get(smallest); |
| 254 | Collection<DeviceId> maxBucket = controllerDevices.get(largest); |
| 255 | int bucketCount = controllerDevices.keySet().size(); |
| 256 | |
| 257 | int delta = (maxBucket.size() - minBucket.size()) / 2; |
| 258 | delta = Math.min(deviceCount / bucketCount, delta); |
| 259 | |
| 260 | if (delta > 0) { |
| 261 | log.info("Attempting to move {} nodes from {} to {}...", delta, |
| 262 | largest.id(), smallest.id()); |
| 263 | |
| 264 | int i = 0; |
| 265 | Iterator<DeviceId> it = maxBucket.iterator(); |
| 266 | while (it.hasNext() && i < delta) { |
| 267 | DeviceId deviceId = it.next(); |
| 268 | log.info("Setting {} as the master for {}", smallest.id(), deviceId); |
| 269 | setRole(smallest.id(), deviceId, MASTER); |
Thomas Vachuska | 12dfdc3 | 2014-11-29 16:03:12 -0800 | [diff] [blame] | 270 | controllerDevices.get(smallest).add(deviceId); |
Thomas Vachuska | 1e68bdd | 2014-11-29 13:53:10 -0800 | [diff] [blame] | 271 | it.remove(); |
| 272 | i++; |
| 273 | } |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 278 | // Posts the specified event to the local event dispatcher. |
| 279 | private void post(MastershipEvent event) { |
| 280 | if (event != null && eventDispatcher != null) { |
| 281 | eventDispatcher.post(event); |
| 282 | } |
| 283 | } |
Ayaka Koshibe | 3eed2b0 | 2014-09-23 13:28:05 -0700 | [diff] [blame] | 284 | |
Ayaka Koshibe | 3de43ca | 2014-09-26 16:40:23 -0700 | [diff] [blame] | 285 | //callback for reacting to cluster events |
| 286 | private class InternalClusterEventListener implements ClusterEventListener { |
| 287 | |
Ayaka Koshibe | ea5b4ce | 2014-10-11 14:17:17 -0700 | [diff] [blame] | 288 | // A notion of a local maximum cluster size, used to tie-break. |
| 289 | // Think of a better way to do this. |
| 290 | private AtomicInteger clusterSize; |
| 291 | |
| 292 | InternalClusterEventListener() { |
| 293 | clusterSize = new AtomicInteger(0); |
| 294 | } |
| 295 | |
Ayaka Koshibe | 3de43ca | 2014-09-26 16:40:23 -0700 | [diff] [blame] | 296 | @Override |
| 297 | public void event(ClusterEvent event) { |
| 298 | switch (event.type()) { |
Ayaka Koshibe | 3de43ca | 2014-09-26 16:40:23 -0700 | [diff] [blame] | 299 | case INSTANCE_ADDED: |
| 300 | case INSTANCE_ACTIVATED: |
Ayaka Koshibe | ea5b4ce | 2014-10-11 14:17:17 -0700 | [diff] [blame] | 301 | clusterSize.incrementAndGet(); |
| 302 | log.info("instance {} added/activated", event.subject()); |
| 303 | break; |
Ayaka Koshibe | 3de43ca | 2014-09-26 16:40:23 -0700 | [diff] [blame] | 304 | case INSTANCE_REMOVED: |
| 305 | case INSTANCE_DEACTIVATED: |
Ayaka Koshibe | ea5b4ce | 2014-10-11 14:17:17 -0700 | [diff] [blame] | 306 | ControllerNode node = event.subject(); |
HIGUCHI Yuta | 59f0229 | 2015-02-25 19:51:48 -0800 | [diff] [blame] | 307 | log.info("instance {} removed/deactivated", node); |
| 308 | store.relinquishAllRole(node.id()); |
Ayaka Koshibe | ea5b4ce | 2014-10-11 14:17:17 -0700 | [diff] [blame] | 309 | |
Ayaka Koshibe | ea5b4ce | 2014-10-11 14:17:17 -0700 | [diff] [blame] | 310 | clusterSize.decrementAndGet(); |
Ayaka Koshibe | 3de43ca | 2014-09-26 16:40:23 -0700 | [diff] [blame] | 311 | break; |
| 312 | default: |
| 313 | log.warn("unknown cluster event {}", event); |
| 314 | } |
| 315 | } |
| 316 | |
HIGUCHI Yuta | 59f0229 | 2015-02-25 19:51:48 -0800 | [diff] [blame] | 317 | // Can be removed if we go with naive split-brain handling: only majority |
| 318 | // assigns mastership |
Ayaka Koshibe | ea5b4ce | 2014-10-11 14:17:17 -0700 | [diff] [blame] | 319 | private boolean isInMajority() { |
| 320 | if (clusterService.getNodes().size() > (clusterSize.intValue() / 2)) { |
| 321 | return true; |
| 322 | } |
Ayaka Koshibe | a7384a8 | 2014-10-22 18:59:06 -0700 | [diff] [blame] | 323 | |
alshabib | 4785eec | 2014-12-04 16:45:45 -0800 | [diff] [blame] | 324 | //FIXME: break tie for equal-sized clusters, |
| 325 | |
Ayaka Koshibe | ea5b4ce | 2014-10-11 14:17:17 -0700 | [diff] [blame] | 326 | return false; |
| 327 | } |
| 328 | |
Ayaka Koshibe | 3de43ca | 2014-09-26 16:40:23 -0700 | [diff] [blame] | 329 | } |
Ayaka Koshibe | 65efaef | 2014-09-29 18:21:56 -0700 | [diff] [blame] | 330 | |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 331 | public class InternalDelegate implements MastershipStoreDelegate { |
| 332 | |
| 333 | @Override |
| 334 | public void notify(MastershipEvent event) { |
Yuta HIGUCHI | 9e11ac0 | 2014-11-12 10:09:49 -0800 | [diff] [blame] | 335 | log.trace("dispatching mastership event {}", event); |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 336 | eventDispatcher.post(event); |
| 337 | } |
| 338 | |
| 339 | } |
| 340 | |
Ayaka Koshibe | 1660969 | 2014-09-23 12:46:15 -0700 | [diff] [blame] | 341 | } |