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.store.cluster.impl; |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 17 | |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 18 | import static com.google.common.base.Preconditions.checkArgument; |
| 19 | import static com.google.common.base.Preconditions.checkNotNull; |
| 20 | import static org.onlab.util.Tools.groupedThreads; |
| 21 | import static org.slf4j.LoggerFactory.getLogger; |
| 22 | |
| 23 | import java.io.File; |
| 24 | import java.io.IOException; |
| 25 | import java.net.InetAddress; |
| 26 | import java.net.NetworkInterface; |
| 27 | import java.net.SocketException; |
| 28 | import java.util.Enumeration; |
| 29 | import java.util.Map; |
| 30 | import java.util.Set; |
| 31 | import java.util.concurrent.ExecutorService; |
| 32 | import java.util.concurrent.Executors; |
| 33 | import java.util.concurrent.ScheduledExecutorService; |
| 34 | import java.util.concurrent.TimeUnit; |
| 35 | import java.util.stream.Collectors; |
Yuta HIGUCHI | b5df76d | 2014-09-27 20:54:00 -0700 | [diff] [blame] | 36 | |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 37 | import org.apache.felix.scr.annotations.Activate; |
| 38 | import org.apache.felix.scr.annotations.Component; |
| 39 | import org.apache.felix.scr.annotations.Deactivate; |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 40 | import org.apache.felix.scr.annotations.Service; |
Madan Jampani | 7d2fab2 | 2015-03-18 17:21:57 -0700 | [diff] [blame^] | 41 | import org.joda.time.DateTime; |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 42 | import org.onlab.netty.Endpoint; |
| 43 | import org.onlab.netty.Message; |
| 44 | import org.onlab.netty.MessageHandler; |
| 45 | import org.onlab.netty.NettyMessagingService; |
| 46 | import org.onlab.packet.IpAddress; |
| 47 | import org.onlab.util.KryoNamespace; |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 48 | import org.onosproject.cluster.ClusterEvent; |
| 49 | import org.onosproject.cluster.ClusterStore; |
| 50 | import org.onosproject.cluster.ClusterStoreDelegate; |
| 51 | import org.onosproject.cluster.ControllerNode; |
| 52 | import org.onosproject.cluster.DefaultControllerNode; |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 53 | import org.onosproject.cluster.ControllerNode.State; |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 54 | import org.onosproject.cluster.NodeId; |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 55 | import org.onosproject.store.AbstractStore; |
| 56 | import org.onosproject.store.serializers.KryoNamespaces; |
| 57 | import org.onosproject.store.serializers.KryoSerializer; |
| 58 | import org.slf4j.Logger; |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 59 | |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 60 | import com.google.common.collect.ImmutableSet; |
| 61 | import com.google.common.collect.Maps; |
| 62 | import com.hazelcast.util.AddressUtil; |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 63 | |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 64 | @Component(immediate = true) |
| 65 | @Service |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 66 | /** |
| 67 | * Distributed cluster nodes store that employs an accrual failure |
| 68 | * detector to identify cluster member up/down status. |
| 69 | */ |
tom | 0755a36 | 2014-09-24 11:54:43 -0700 | [diff] [blame] | 70 | public class DistributedClusterStore |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 71 | extends AbstractStore<ClusterEvent, ClusterStoreDelegate> |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 72 | implements ClusterStore { |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 73 | |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 74 | private final Logger log = getLogger(DistributedClusterStore.class); |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 75 | |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 76 | // TODO: make these configurable. |
| 77 | private static final int HEARTBEAT_FD_PORT = 2419; |
| 78 | private static final int HEARTBEAT_INTERVAL_MS = 100; |
| 79 | private static final int PHI_FAILURE_THRESHOLD = 10; |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 80 | |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 81 | private static final String CONFIG_DIR = "../config"; |
| 82 | private static final String CLUSTER_DEFINITION_FILE = "cluster.json"; |
| 83 | private static final String HEARTBEAT_MESSAGE = "onos-cluster-heartbeat"; |
Yuta HIGUCHI | d1a63e9 | 2014-12-02 13:14:28 -0800 | [diff] [blame] | 84 | |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 85 | private static final KryoSerializer SERIALIZER = new KryoSerializer() { |
| 86 | @Override |
| 87 | protected void setupKryoPool() { |
| 88 | serializerPool = KryoNamespace.newBuilder() |
| 89 | .register(KryoNamespaces.API) |
| 90 | .register(HeartbeatMessage.class) |
| 91 | .build() |
| 92 | .populate(1); |
| 93 | } |
| 94 | }; |
| 95 | |
| 96 | private static final String INSTANCE_ID_NULL = "Instance ID cannot be null"; |
| 97 | |
| 98 | private ClusterDefinition clusterDefinition; |
| 99 | |
| 100 | private Set<ControllerNode> seedNodes; |
| 101 | private final Map<NodeId, ControllerNode> allNodes = Maps.newConcurrentMap(); |
| 102 | private final Map<NodeId, State> nodeStates = Maps.newConcurrentMap(); |
Madan Jampani | 7d2fab2 | 2015-03-18 17:21:57 -0700 | [diff] [blame^] | 103 | private final Map<NodeId, DateTime> nodeStateLastUpdatedTimes = Maps.newConcurrentMap(); |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 104 | private NettyMessagingService messagingService = new NettyMessagingService(); |
| 105 | private ScheduledExecutorService heartBeatSender = Executors.newSingleThreadScheduledExecutor( |
| 106 | groupedThreads("onos/cluster/membership", "heartbeat-sender")); |
| 107 | private ExecutorService heartBeatMessageHandler = Executors.newSingleThreadExecutor( |
| 108 | groupedThreads("onos/cluster/membership", "heartbeat-receiver")); |
| 109 | |
| 110 | private PhiAccrualFailureDetector failureDetector; |
| 111 | |
| 112 | private ControllerNode localNode; |
| 113 | |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 114 | @Activate |
| 115 | public void activate() { |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 116 | File clusterDefinitionFile = new File(CONFIG_DIR, |
| 117 | CLUSTER_DEFINITION_FILE); |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 118 | |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 119 | try { |
| 120 | clusterDefinition = new ClusterDefinitionStore( |
| 121 | clusterDefinitionFile.getPath()).read(); |
| 122 | seedNodes = ImmutableSet |
| 123 | .copyOf(clusterDefinition.getNodes()) |
| 124 | .stream() |
| 125 | .map(nodeInfo -> new DefaultControllerNode(new NodeId( |
| 126 | nodeInfo.getId()), IpAddress.valueOf(nodeInfo |
| 127 | .getIp()), nodeInfo.getTcpPort())) |
| 128 | .collect(Collectors.toSet()); |
| 129 | } catch (IOException e) { |
| 130 | throw new IllegalStateException( |
| 131 | "Failed to read cluster definition.", e); |
| 132 | } |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 133 | |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 134 | seedNodes.forEach(node -> { |
| 135 | allNodes.put(node.id(), node); |
Madan Jampani | 7d2fab2 | 2015-03-18 17:21:57 -0700 | [diff] [blame^] | 136 | updateState(node.id(), State.INACTIVE); |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 137 | }); |
| 138 | |
| 139 | establishSelfIdentity(); |
| 140 | |
| 141 | messagingService = new NettyMessagingService(HEARTBEAT_FD_PORT); |
| 142 | |
| 143 | try { |
| 144 | messagingService.activate(); |
| 145 | } catch (InterruptedException e) { |
| 146 | Thread.currentThread().interrupt(); |
| 147 | throw new IllegalStateException( |
| 148 | "Failed to cleanly initialize membership and" |
| 149 | + " failure detector communication channel.", e); |
| 150 | } |
| 151 | messagingService.registerHandler(HEARTBEAT_MESSAGE, |
| 152 | new HeartbeatMessageHandler(), heartBeatMessageHandler); |
| 153 | |
| 154 | failureDetector = new PhiAccrualFailureDetector(); |
| 155 | |
| 156 | heartBeatSender.scheduleWithFixedDelay(this::heartbeat, 0, |
| 157 | HEARTBEAT_INTERVAL_MS, TimeUnit.MILLISECONDS); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 158 | |
| 159 | log.info("Started"); |
| 160 | } |
| 161 | |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 162 | @Deactivate |
| 163 | public void deactivate() { |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 164 | try { |
| 165 | messagingService.deactivate(); |
| 166 | } catch (Exception e) { |
| 167 | log.trace("Failed to cleanly shutdown cluster membership messaging", e); |
| 168 | } |
| 169 | |
| 170 | heartBeatSender.shutdownNow(); |
| 171 | heartBeatMessageHandler.shutdownNow(); |
| 172 | |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 173 | log.info("Stopped"); |
| 174 | } |
| 175 | |
| 176 | @Override |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 177 | public void setDelegate(ClusterStoreDelegate delegate) { |
| 178 | checkNotNull(delegate, "Delegate cannot be null"); |
| 179 | this.delegate = delegate; |
| 180 | } |
| 181 | |
| 182 | @Override |
| 183 | public void unsetDelegate(ClusterStoreDelegate delegate) { |
| 184 | this.delegate = null; |
| 185 | } |
| 186 | |
| 187 | @Override |
| 188 | public boolean hasDelegate() { |
| 189 | return this.delegate != null; |
| 190 | } |
| 191 | |
| 192 | @Override |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 193 | public ControllerNode getLocalNode() { |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 194 | return localNode; |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | @Override |
| 198 | public Set<ControllerNode> getNodes() { |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 199 | return ImmutableSet.copyOf(allNodes.values()); |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 200 | } |
| 201 | |
| 202 | @Override |
| 203 | public ControllerNode getNode(NodeId nodeId) { |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 204 | checkNotNull(nodeId, INSTANCE_ID_NULL); |
| 205 | return allNodes.get(nodeId); |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 206 | } |
| 207 | |
| 208 | @Override |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 209 | public State getState(NodeId nodeId) { |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 210 | checkNotNull(nodeId, INSTANCE_ID_NULL); |
| 211 | return nodeStates.get(nodeId); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | @Override |
Pavlin Radoslavov | 444b519 | 2014-10-28 10:45:19 -0700 | [diff] [blame] | 215 | public ControllerNode addNode(NodeId nodeId, IpAddress ip, int tcpPort) { |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 216 | checkNotNull(nodeId, INSTANCE_ID_NULL); |
| 217 | checkNotNull(ip, "IP address must not be null"); |
| 218 | checkArgument(tcpPort > 5000, "Tcp port must be greater than 5000"); |
| 219 | ControllerNode node = new DefaultControllerNode(nodeId, ip, tcpPort); |
| 220 | allNodes.put(node.id(), node); |
Madan Jampani | 7d2fab2 | 2015-03-18 17:21:57 -0700 | [diff] [blame^] | 221 | updateState(nodeId, State.INACTIVE); |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 222 | delegate.notify(new ClusterEvent(ClusterEvent.Type.INSTANCE_ADDED, node)); |
| 223 | return node; |
tom | ee49c37 | 2014-09-26 15:14:50 -0700 | [diff] [blame] | 224 | } |
| 225 | |
| 226 | @Override |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 227 | public void removeNode(NodeId nodeId) { |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 228 | checkNotNull(nodeId, INSTANCE_ID_NULL); |
| 229 | ControllerNode node = allNodes.remove(nodeId); |
| 230 | if (node != null) { |
| 231 | nodeStates.remove(nodeId); |
| 232 | delegate.notify(new ClusterEvent(ClusterEvent.Type.INSTANCE_REMOVED, node)); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 233 | } |
| 234 | } |
| 235 | |
Madan Jampani | 7d2fab2 | 2015-03-18 17:21:57 -0700 | [diff] [blame^] | 236 | private void updateState(NodeId nodeId, State newState) { |
| 237 | nodeStates.put(nodeId, newState); |
| 238 | nodeStateLastUpdatedTimes.put(nodeId, DateTime.now()); |
| 239 | } |
| 240 | |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 241 | private void establishSelfIdentity() { |
| 242 | try { |
| 243 | IpAddress ip = findLocalIp(); |
| 244 | localNode = new DefaultControllerNode(new NodeId(ip.toString()), ip); |
| 245 | allNodes.put(localNode.id(), localNode); |
Madan Jampani | 7d2fab2 | 2015-03-18 17:21:57 -0700 | [diff] [blame^] | 246 | updateState(localNode.id(), State.ACTIVE); |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 247 | log.info("Local Node: {}", localNode); |
| 248 | } catch (SocketException e) { |
| 249 | throw new IllegalStateException("Cannot determine local IP", e); |
| 250 | } |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 251 | } |
| 252 | |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 253 | private void heartbeat() { |
| 254 | try { |
| 255 | Set<ControllerNode> peers = allNodes.values() |
| 256 | .stream() |
| 257 | .filter(node -> !(node.id().equals(localNode.id()))) |
| 258 | .collect(Collectors.toSet()); |
| 259 | byte[] hbMessagePayload = SERIALIZER.encode(new HeartbeatMessage(localNode, peers)); |
| 260 | peers.forEach((node) -> { |
| 261 | heartbeatToPeer(hbMessagePayload, node); |
| 262 | State currentState = nodeStates.get(node.id()); |
| 263 | double phi = failureDetector.phi(node.id()); |
| 264 | if (phi >= PHI_FAILURE_THRESHOLD) { |
| 265 | if (currentState == State.ACTIVE) { |
Madan Jampani | 7d2fab2 | 2015-03-18 17:21:57 -0700 | [diff] [blame^] | 266 | updateState(node.id(), State.INACTIVE); |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 267 | notifyStateChange(node.id(), State.ACTIVE, State.INACTIVE); |
| 268 | } |
| 269 | } else { |
| 270 | if (currentState == State.INACTIVE) { |
Madan Jampani | 7d2fab2 | 2015-03-18 17:21:57 -0700 | [diff] [blame^] | 271 | updateState(node.id(), State.ACTIVE); |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 272 | notifyStateChange(node.id(), State.INACTIVE, State.ACTIVE); |
| 273 | } |
| 274 | } |
| 275 | }); |
| 276 | } catch (Exception e) { |
| 277 | log.debug("Failed to send heartbeat", e); |
| 278 | } |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 279 | } |
| 280 | |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 281 | private void notifyStateChange(NodeId nodeId, State oldState, State newState) { |
| 282 | ControllerNode node = allNodes.get(nodeId); |
| 283 | if (newState == State.ACTIVE) { |
| 284 | delegate.notify(new ClusterEvent(ClusterEvent.Type.INSTANCE_ACTIVATED, node)); |
| 285 | } else { |
| 286 | delegate.notify(new ClusterEvent(ClusterEvent.Type.INSTANCE_DEACTIVATED, node)); |
| 287 | } |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 288 | } |
| 289 | |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 290 | private void heartbeatToPeer(byte[] messagePayload, ControllerNode peer) { |
| 291 | Endpoint remoteEp = new Endpoint(peer.ip(), HEARTBEAT_FD_PORT); |
| 292 | try { |
| 293 | messagingService.sendAsync(remoteEp, HEARTBEAT_MESSAGE, messagePayload); |
| 294 | } catch (IOException e) { |
| 295 | log.debug("Sending heartbeat to {} failed", remoteEp, e); |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | private IpAddress findLocalIp() throws SocketException { |
| 300 | Enumeration<NetworkInterface> interfaces = |
| 301 | NetworkInterface.getNetworkInterfaces(); |
| 302 | while (interfaces.hasMoreElements()) { |
| 303 | NetworkInterface iface = interfaces.nextElement(); |
| 304 | Enumeration<InetAddress> inetAddresses = iface.getInetAddresses(); |
| 305 | while (inetAddresses.hasMoreElements()) { |
| 306 | IpAddress ip = IpAddress.valueOf(inetAddresses.nextElement()); |
| 307 | if (AddressUtil.matchInterface(ip.toString(), clusterDefinition.getIpPrefix())) { |
| 308 | return ip; |
| 309 | } |
| 310 | } |
| 311 | } |
| 312 | throw new IllegalStateException("Unable to determine local ip"); |
| 313 | } |
| 314 | |
| 315 | private class HeartbeatMessageHandler implements MessageHandler { |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 316 | @Override |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 317 | public void handle(Message message) throws IOException { |
| 318 | HeartbeatMessage hb = SERIALIZER.decode(message.payload()); |
| 319 | failureDetector.report(hb.source().id()); |
| 320 | hb.knownPeers().forEach(node -> { |
| 321 | allNodes.put(node.id(), node); |
| 322 | }); |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 323 | } |
tom | 2d7c65f | 2014-09-23 01:09:35 -0700 | [diff] [blame] | 324 | } |
Ayaka Koshibe | dd91b84 | 2015-03-02 14:48:47 -0800 | [diff] [blame] | 325 | |
| 326 | private static class HeartbeatMessage { |
| 327 | private ControllerNode source; |
| 328 | private Set<ControllerNode> knownPeers; |
| 329 | |
| 330 | public HeartbeatMessage(ControllerNode source, Set<ControllerNode> members) { |
| 331 | this.source = source; |
| 332 | this.knownPeers = ImmutableSet.copyOf(members); |
| 333 | } |
| 334 | |
| 335 | public ControllerNode source() { |
| 336 | return source; |
| 337 | } |
| 338 | |
| 339 | public Set<ControllerNode> knownPeers() { |
| 340 | return knownPeers; |
| 341 | } |
| 342 | } |
| 343 | |
Madan Jampani | 7d2fab2 | 2015-03-18 17:21:57 -0700 | [diff] [blame^] | 344 | @Override |
| 345 | public DateTime getLastUpdated(NodeId nodeId) { |
| 346 | return nodeStateLastUpdatedTimes.get(nodeId); |
| 347 | } |
| 348 | } |