Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 1 | package org.onlab.onos.store.link.impl; |
| 2 | |
| 3 | import com.google.common.base.Function; |
| 4 | import com.google.common.base.Predicate; |
| 5 | import com.google.common.collect.FluentIterable; |
| 6 | import com.google.common.collect.HashMultimap; |
Madan Jampani | a97e820 | 2014-10-10 17:01:33 -0700 | [diff] [blame] | 7 | import com.google.common.collect.ImmutableList; |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 8 | import com.google.common.collect.Maps; |
| 9 | import com.google.common.collect.SetMultimap; |
| 10 | |
Madan Jampani | a97e820 | 2014-10-10 17:01:33 -0700 | [diff] [blame] | 11 | import org.apache.commons.lang3.RandomUtils; |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 12 | import org.apache.commons.lang3.concurrent.ConcurrentUtils; |
| 13 | import org.apache.felix.scr.annotations.Activate; |
| 14 | import org.apache.felix.scr.annotations.Component; |
| 15 | import org.apache.felix.scr.annotations.Deactivate; |
| 16 | import org.apache.felix.scr.annotations.Reference; |
| 17 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 18 | import org.apache.felix.scr.annotations.Service; |
| 19 | import org.onlab.onos.cluster.ClusterService; |
Madan Jampani | a97e820 | 2014-10-10 17:01:33 -0700 | [diff] [blame] | 20 | import org.onlab.onos.cluster.ControllerNode; |
| 21 | import org.onlab.onos.cluster.NodeId; |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 22 | import org.onlab.onos.net.AnnotationsUtil; |
| 23 | import org.onlab.onos.net.ConnectPoint; |
| 24 | import org.onlab.onos.net.DefaultAnnotations; |
| 25 | import org.onlab.onos.net.DefaultLink; |
| 26 | import org.onlab.onos.net.DeviceId; |
| 27 | import org.onlab.onos.net.Link; |
| 28 | import org.onlab.onos.net.SparseAnnotations; |
| 29 | import org.onlab.onos.net.Link.Type; |
| 30 | import org.onlab.onos.net.LinkKey; |
| 31 | import org.onlab.onos.net.Provided; |
Yuta HIGUCHI | 093e83e | 2014-10-10 22:26:11 -0700 | [diff] [blame] | 32 | import org.onlab.onos.net.device.DeviceClockService; |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 33 | import org.onlab.onos.net.link.DefaultLinkDescription; |
| 34 | import org.onlab.onos.net.link.LinkDescription; |
| 35 | import org.onlab.onos.net.link.LinkEvent; |
| 36 | import org.onlab.onos.net.link.LinkStore; |
| 37 | import org.onlab.onos.net.link.LinkStoreDelegate; |
| 38 | import org.onlab.onos.net.provider.ProviderId; |
| 39 | import org.onlab.onos.store.AbstractStore; |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 40 | import org.onlab.onos.store.Timestamp; |
| 41 | import org.onlab.onos.store.cluster.messaging.ClusterCommunicationService; |
| 42 | import org.onlab.onos.store.cluster.messaging.ClusterMessage; |
| 43 | import org.onlab.onos.store.cluster.messaging.ClusterMessageHandler; |
| 44 | import org.onlab.onos.store.cluster.messaging.MessageSubject; |
| 45 | import org.onlab.onos.store.common.impl.Timestamped; |
| 46 | import org.onlab.onos.store.serializers.DistributedStoreSerializers; |
| 47 | import org.onlab.onos.store.serializers.KryoSerializer; |
| 48 | import org.onlab.util.KryoPool; |
| 49 | import org.onlab.util.NewConcurrentHashMap; |
| 50 | import org.slf4j.Logger; |
| 51 | |
| 52 | import java.io.IOException; |
| 53 | import java.util.Collections; |
Madan Jampani | a97e820 | 2014-10-10 17:01:33 -0700 | [diff] [blame] | 54 | import java.util.HashMap; |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 55 | import java.util.HashSet; |
| 56 | import java.util.Map; |
| 57 | import java.util.Set; |
| 58 | import java.util.Map.Entry; |
| 59 | import java.util.concurrent.ConcurrentHashMap; |
| 60 | import java.util.concurrent.ConcurrentMap; |
Madan Jampani | a97e820 | 2014-10-10 17:01:33 -0700 | [diff] [blame] | 61 | import java.util.concurrent.ScheduledExecutorService; |
| 62 | import java.util.concurrent.TimeUnit; |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 63 | |
Madan Jampani | a97e820 | 2014-10-10 17:01:33 -0700 | [diff] [blame] | 64 | import static java.util.concurrent.Executors.newSingleThreadScheduledExecutor; |
| 65 | import static org.onlab.onos.cluster.ControllerNodeToNodeId.toNodeId; |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 66 | import static org.onlab.onos.net.DefaultAnnotations.union; |
| 67 | import static org.onlab.onos.net.DefaultAnnotations.merge; |
| 68 | import static org.onlab.onos.net.Link.Type.DIRECT; |
| 69 | import static org.onlab.onos.net.Link.Type.INDIRECT; |
Yuta HIGUCHI | 18ab8a9 | 2014-10-13 11:16:19 -0700 | [diff] [blame] | 70 | import static org.onlab.onos.net.LinkKey.linkKey; |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 71 | import static org.onlab.onos.net.link.LinkEvent.Type.*; |
Madan Jampani | a97e820 | 2014-10-10 17:01:33 -0700 | [diff] [blame] | 72 | import static org.onlab.util.Tools.namedThreads; |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 73 | import static org.slf4j.LoggerFactory.getLogger; |
| 74 | import static com.google.common.collect.Multimaps.synchronizedSetMultimap; |
| 75 | import static com.google.common.base.Predicates.notNull; |
| 76 | |
| 77 | /** |
| 78 | * Manages inventory of infrastructure links in distributed data store |
| 79 | * that uses optimistic replication and gossip based techniques. |
| 80 | */ |
| 81 | @Component(immediate = true) |
| 82 | @Service |
| 83 | public class GossipLinkStore |
| 84 | extends AbstractStore<LinkEvent, LinkStoreDelegate> |
| 85 | implements LinkStore { |
| 86 | |
| 87 | private final Logger log = getLogger(getClass()); |
| 88 | |
| 89 | // Link inventory |
| 90 | private final ConcurrentMap<LinkKey, ConcurrentMap<ProviderId, Timestamped<LinkDescription>>> linkDescs = |
| 91 | new ConcurrentHashMap<>(); |
| 92 | |
| 93 | // Link instance cache |
| 94 | private final ConcurrentMap<LinkKey, Link> links = new ConcurrentHashMap<>(); |
| 95 | |
| 96 | // Egress and ingress link sets |
| 97 | private final SetMultimap<DeviceId, LinkKey> srcLinks = createSynchronizedHashMultiMap(); |
| 98 | private final SetMultimap<DeviceId, LinkKey> dstLinks = createSynchronizedHashMultiMap(); |
| 99 | |
| 100 | // Remove links |
| 101 | private final Map<LinkKey, Timestamp> removedLinks = Maps.newHashMap(); |
| 102 | |
| 103 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
Yuta HIGUCHI | 093e83e | 2014-10-10 22:26:11 -0700 | [diff] [blame] | 104 | protected DeviceClockService deviceClockService; |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 105 | |
| 106 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 107 | protected ClusterCommunicationService clusterCommunicator; |
| 108 | |
| 109 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 110 | protected ClusterService clusterService; |
| 111 | |
| 112 | private static final KryoSerializer SERIALIZER = new KryoSerializer() { |
| 113 | @Override |
| 114 | protected void setupKryoPool() { |
| 115 | serializerPool = KryoPool.newBuilder() |
| 116 | .register(DistributedStoreSerializers.COMMON) |
| 117 | .register(InternalLinkEvent.class) |
| 118 | .register(InternalLinkRemovedEvent.class) |
Madan Jampani | d2054d4 | 2014-10-10 17:27:06 -0700 | [diff] [blame] | 119 | .register(LinkAntiEntropyAdvertisement.class) |
| 120 | .register(LinkFragmentId.class) |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 121 | .build() |
| 122 | .populate(1); |
| 123 | } |
| 124 | }; |
| 125 | |
Madan Jampani | a97e820 | 2014-10-10 17:01:33 -0700 | [diff] [blame] | 126 | private ScheduledExecutorService executor; |
| 127 | |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 128 | @Activate |
| 129 | public void activate() { |
| 130 | |
| 131 | clusterCommunicator.addSubscriber( |
Madan Jampani | a97e820 | 2014-10-10 17:01:33 -0700 | [diff] [blame] | 132 | GossipLinkStoreMessageSubjects.LINK_UPDATE, |
| 133 | new InternalLinkEventListener()); |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 134 | clusterCommunicator.addSubscriber( |
Madan Jampani | a97e820 | 2014-10-10 17:01:33 -0700 | [diff] [blame] | 135 | GossipLinkStoreMessageSubjects.LINK_REMOVED, |
| 136 | new InternalLinkRemovedEventListener()); |
| 137 | clusterCommunicator.addSubscriber( |
| 138 | GossipLinkStoreMessageSubjects.LINK_ANTI_ENTROPY_ADVERTISEMENT, |
| 139 | new InternalLinkAntiEntropyAdvertisementListener()); |
| 140 | |
| 141 | executor = |
| 142 | newSingleThreadScheduledExecutor(namedThreads("link-anti-entropy-%d")); |
| 143 | |
| 144 | // TODO: Make these configurable |
| 145 | long initialDelaySec = 5; |
| 146 | long periodSec = 5; |
| 147 | // start anti-entropy thread |
| 148 | executor.scheduleAtFixedRate(new SendAdvertisementTask(), |
| 149 | initialDelaySec, periodSec, TimeUnit.SECONDS); |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 150 | |
| 151 | log.info("Started"); |
| 152 | } |
| 153 | |
| 154 | @Deactivate |
| 155 | public void deactivate() { |
Madan Jampani | 3ffbb27 | 2014-10-13 11:19:37 -0700 | [diff] [blame] | 156 | |
| 157 | executor.shutdownNow(); |
| 158 | try { |
| 159 | if (!executor.awaitTermination(5, TimeUnit.SECONDS)) { |
| 160 | log.error("Timeout during executor shutdown"); |
| 161 | } |
| 162 | } catch (InterruptedException e) { |
| 163 | log.error("Error during executor shutdown", e); |
| 164 | } |
| 165 | |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 166 | linkDescs.clear(); |
| 167 | links.clear(); |
| 168 | srcLinks.clear(); |
| 169 | dstLinks.clear(); |
| 170 | log.info("Stopped"); |
| 171 | } |
| 172 | |
| 173 | @Override |
| 174 | public int getLinkCount() { |
| 175 | return links.size(); |
| 176 | } |
| 177 | |
| 178 | @Override |
| 179 | public Iterable<Link> getLinks() { |
| 180 | return Collections.unmodifiableCollection(links.values()); |
| 181 | } |
| 182 | |
| 183 | @Override |
| 184 | public Set<Link> getDeviceEgressLinks(DeviceId deviceId) { |
| 185 | // lock for iteration |
| 186 | synchronized (srcLinks) { |
| 187 | return FluentIterable.from(srcLinks.get(deviceId)) |
| 188 | .transform(lookupLink()) |
| 189 | .filter(notNull()) |
| 190 | .toSet(); |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | @Override |
| 195 | public Set<Link> getDeviceIngressLinks(DeviceId deviceId) { |
| 196 | // lock for iteration |
| 197 | synchronized (dstLinks) { |
| 198 | return FluentIterable.from(dstLinks.get(deviceId)) |
| 199 | .transform(lookupLink()) |
| 200 | .filter(notNull()) |
| 201 | .toSet(); |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | @Override |
| 206 | public Link getLink(ConnectPoint src, ConnectPoint dst) { |
Yuta HIGUCHI | 18ab8a9 | 2014-10-13 11:16:19 -0700 | [diff] [blame] | 207 | return links.get(linkKey(src, dst)); |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | @Override |
| 211 | public Set<Link> getEgressLinks(ConnectPoint src) { |
| 212 | Set<Link> egress = new HashSet<>(); |
| 213 | for (LinkKey linkKey : srcLinks.get(src.deviceId())) { |
| 214 | if (linkKey.src().equals(src)) { |
| 215 | egress.add(links.get(linkKey)); |
| 216 | } |
| 217 | } |
| 218 | return egress; |
| 219 | } |
| 220 | |
| 221 | @Override |
| 222 | public Set<Link> getIngressLinks(ConnectPoint dst) { |
| 223 | Set<Link> ingress = new HashSet<>(); |
| 224 | for (LinkKey linkKey : dstLinks.get(dst.deviceId())) { |
| 225 | if (linkKey.dst().equals(dst)) { |
| 226 | ingress.add(links.get(linkKey)); |
| 227 | } |
| 228 | } |
| 229 | return ingress; |
| 230 | } |
| 231 | |
| 232 | @Override |
| 233 | public LinkEvent createOrUpdateLink(ProviderId providerId, |
| 234 | LinkDescription linkDescription) { |
| 235 | |
| 236 | DeviceId dstDeviceId = linkDescription.dst().deviceId(); |
Yuta HIGUCHI | 093e83e | 2014-10-10 22:26:11 -0700 | [diff] [blame] | 237 | Timestamp newTimestamp = deviceClockService.getTimestamp(dstDeviceId); |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 238 | |
| 239 | final Timestamped<LinkDescription> deltaDesc = new Timestamped<>(linkDescription, newTimestamp); |
| 240 | |
Yuta HIGUCHI | 990aecc | 2014-10-13 22:21:42 -0700 | [diff] [blame] | 241 | LinkKey key = linkKey(linkDescription.src(), linkDescription.dst()); |
Yuta HIGUCHI | 92cd51e | 2014-10-13 10:51:45 -0700 | [diff] [blame] | 242 | final LinkEvent event; |
| 243 | final Timestamped<LinkDescription> mergedDesc; |
| 244 | synchronized (getLinkDescriptions(key)) { |
| 245 | event = createOrUpdateLinkInternal(providerId, deltaDesc); |
| 246 | mergedDesc = getLinkDescriptions(key).get(providerId); |
| 247 | } |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 248 | |
| 249 | if (event != null) { |
| 250 | log.info("Notifying peers of a link update topology event from providerId: " |
| 251 | + "{} between src: {} and dst: {}", |
| 252 | providerId, linkDescription.src(), linkDescription.dst()); |
| 253 | try { |
Yuta HIGUCHI | 92cd51e | 2014-10-13 10:51:45 -0700 | [diff] [blame] | 254 | notifyPeers(new InternalLinkEvent(providerId, mergedDesc)); |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 255 | } catch (IOException e) { |
| 256 | log.info("Failed to notify peers of a link update topology event from providerId: " |
| 257 | + "{} between src: {} and dst: {}", |
| 258 | providerId, linkDescription.src(), linkDescription.dst()); |
| 259 | } |
| 260 | } |
| 261 | return event; |
| 262 | } |
| 263 | |
| 264 | private LinkEvent createOrUpdateLinkInternal( |
| 265 | ProviderId providerId, |
| 266 | Timestamped<LinkDescription> linkDescription) { |
| 267 | |
Yuta HIGUCHI | 990aecc | 2014-10-13 22:21:42 -0700 | [diff] [blame] | 268 | LinkKey key = linkKey(linkDescription.value().src(), |
| 269 | linkDescription.value().dst()); |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 270 | ConcurrentMap<ProviderId, Timestamped<LinkDescription>> descs = getLinkDescriptions(key); |
| 271 | |
| 272 | synchronized (descs) { |
| 273 | // if the link was previously removed, we should proceed if and |
| 274 | // only if this request is more recent. |
| 275 | Timestamp linkRemovedTimestamp = removedLinks.get(key); |
| 276 | if (linkRemovedTimestamp != null) { |
| 277 | if (linkDescription.isNewer(linkRemovedTimestamp)) { |
| 278 | removedLinks.remove(key); |
| 279 | } else { |
| 280 | return null; |
| 281 | } |
| 282 | } |
| 283 | |
| 284 | final Link oldLink = links.get(key); |
| 285 | // update description |
| 286 | createOrUpdateLinkDescription(descs, providerId, linkDescription); |
| 287 | final Link newLink = composeLink(descs); |
| 288 | if (oldLink == null) { |
| 289 | return createLink(key, newLink); |
| 290 | } |
| 291 | return updateLink(key, oldLink, newLink); |
| 292 | } |
| 293 | } |
| 294 | |
| 295 | // Guarded by linkDescs value (=locking each Link) |
| 296 | private Timestamped<LinkDescription> createOrUpdateLinkDescription( |
| 297 | ConcurrentMap<ProviderId, Timestamped<LinkDescription>> existingLinkDescriptions, |
| 298 | ProviderId providerId, |
| 299 | Timestamped<LinkDescription> linkDescription) { |
| 300 | |
| 301 | // merge existing attributes and merge |
| 302 | Timestamped<LinkDescription> existingLinkDescription = existingLinkDescriptions.get(providerId); |
| 303 | if (existingLinkDescription != null && existingLinkDescription.isNewer(linkDescription)) { |
| 304 | return null; |
| 305 | } |
| 306 | Timestamped<LinkDescription> newLinkDescription = linkDescription; |
| 307 | if (existingLinkDescription != null) { |
| 308 | SparseAnnotations merged = union(existingLinkDescription.value().annotations(), |
| 309 | linkDescription.value().annotations()); |
| 310 | newLinkDescription = new Timestamped<LinkDescription>( |
| 311 | new DefaultLinkDescription( |
| 312 | linkDescription.value().src(), |
| 313 | linkDescription.value().dst(), |
| 314 | linkDescription.value().type(), merged), |
| 315 | linkDescription.timestamp()); |
| 316 | } |
| 317 | return existingLinkDescriptions.put(providerId, newLinkDescription); |
| 318 | } |
| 319 | |
| 320 | // Creates and stores the link and returns the appropriate event. |
| 321 | // Guarded by linkDescs value (=locking each Link) |
| 322 | private LinkEvent createLink(LinkKey key, Link newLink) { |
| 323 | |
| 324 | if (newLink.providerId().isAncillary()) { |
| 325 | // TODO: revisit ancillary only Link handling |
| 326 | |
| 327 | // currently treating ancillary only as down (not visible outside) |
| 328 | return null; |
| 329 | } |
| 330 | |
| 331 | links.put(key, newLink); |
| 332 | srcLinks.put(newLink.src().deviceId(), key); |
| 333 | dstLinks.put(newLink.dst().deviceId(), key); |
| 334 | return new LinkEvent(LINK_ADDED, newLink); |
| 335 | } |
| 336 | |
| 337 | // Updates, if necessary the specified link and returns the appropriate event. |
| 338 | // Guarded by linkDescs value (=locking each Link) |
| 339 | private LinkEvent updateLink(LinkKey key, Link oldLink, Link newLink) { |
| 340 | |
| 341 | if (newLink.providerId().isAncillary()) { |
| 342 | // TODO: revisit ancillary only Link handling |
| 343 | |
| 344 | // currently treating ancillary only as down (not visible outside) |
| 345 | return null; |
| 346 | } |
| 347 | |
| 348 | if ((oldLink.type() == INDIRECT && newLink.type() == DIRECT) || |
| 349 | !AnnotationsUtil.isEqual(oldLink.annotations(), newLink.annotations())) { |
| 350 | |
| 351 | links.put(key, newLink); |
| 352 | // strictly speaking following can be ommitted |
| 353 | srcLinks.put(oldLink.src().deviceId(), key); |
| 354 | dstLinks.put(oldLink.dst().deviceId(), key); |
| 355 | return new LinkEvent(LINK_UPDATED, newLink); |
| 356 | } |
| 357 | return null; |
| 358 | } |
| 359 | |
| 360 | @Override |
| 361 | public LinkEvent removeLink(ConnectPoint src, ConnectPoint dst) { |
Yuta HIGUCHI | 18ab8a9 | 2014-10-13 11:16:19 -0700 | [diff] [blame] | 362 | final LinkKey key = linkKey(src, dst); |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 363 | |
| 364 | DeviceId dstDeviceId = dst.deviceId(); |
Yuta HIGUCHI | 093e83e | 2014-10-10 22:26:11 -0700 | [diff] [blame] | 365 | Timestamp timestamp = deviceClockService.getTimestamp(dstDeviceId); |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 366 | |
| 367 | LinkEvent event = removeLinkInternal(key, timestamp); |
| 368 | |
| 369 | if (event != null) { |
| 370 | log.info("Notifying peers of a link removed topology event for a link " |
| 371 | + "between src: {} and dst: {}", src, dst); |
| 372 | try { |
| 373 | notifyPeers(new InternalLinkRemovedEvent(key, timestamp)); |
| 374 | } catch (IOException e) { |
| 375 | log.error("Failed to notify peers of a link removed topology event for a link " |
| 376 | + "between src: {} and dst: {}", src, dst); |
| 377 | } |
| 378 | } |
| 379 | return event; |
| 380 | } |
| 381 | |
| 382 | private LinkEvent removeLinkInternal(LinkKey key, Timestamp timestamp) { |
| 383 | ConcurrentMap<ProviderId, Timestamped<LinkDescription>> linkDescriptions = |
| 384 | getLinkDescriptions(key); |
| 385 | synchronized (linkDescriptions) { |
| 386 | // accept removal request if given timestamp is newer than |
| 387 | // the latest Timestamp from Primary provider |
| 388 | ProviderId primaryProviderId = pickPrimaryProviderId(linkDescriptions); |
| 389 | if (linkDescriptions.get(primaryProviderId).isNewer(timestamp)) { |
| 390 | return null; |
| 391 | } |
| 392 | removedLinks.put(key, timestamp); |
| 393 | Link link = links.remove(key); |
| 394 | linkDescriptions.clear(); |
| 395 | if (link != null) { |
| 396 | srcLinks.remove(link.src().deviceId(), key); |
| 397 | dstLinks.remove(link.dst().deviceId(), key); |
| 398 | return new LinkEvent(LINK_REMOVED, link); |
| 399 | } |
| 400 | return null; |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | private static <K, V> SetMultimap<K, V> createSynchronizedHashMultiMap() { |
| 405 | return synchronizedSetMultimap(HashMultimap.<K, V>create()); |
| 406 | } |
| 407 | |
| 408 | /** |
| 409 | * @return primary ProviderID, or randomly chosen one if none exists |
| 410 | */ |
| 411 | private ProviderId pickPrimaryProviderId( |
| 412 | ConcurrentMap<ProviderId, Timestamped<LinkDescription>> providerDescs) { |
| 413 | |
| 414 | ProviderId fallBackPrimary = null; |
| 415 | for (Entry<ProviderId, Timestamped<LinkDescription>> e : providerDescs.entrySet()) { |
| 416 | if (!e.getKey().isAncillary()) { |
| 417 | return e.getKey(); |
| 418 | } else if (fallBackPrimary == null) { |
| 419 | // pick randomly as a fallback in case there is no primary |
| 420 | fallBackPrimary = e.getKey(); |
| 421 | } |
| 422 | } |
| 423 | return fallBackPrimary; |
| 424 | } |
| 425 | |
| 426 | private Link composeLink(ConcurrentMap<ProviderId, Timestamped<LinkDescription>> linkDescriptions) { |
| 427 | ProviderId primaryProviderId = pickPrimaryProviderId(linkDescriptions); |
| 428 | Timestamped<LinkDescription> base = linkDescriptions.get(primaryProviderId); |
| 429 | |
| 430 | ConnectPoint src = base.value().src(); |
| 431 | ConnectPoint dst = base.value().dst(); |
| 432 | Type type = base.value().type(); |
| 433 | DefaultAnnotations annotations = DefaultAnnotations.builder().build(); |
| 434 | annotations = merge(annotations, base.value().annotations()); |
| 435 | |
| 436 | for (Entry<ProviderId, Timestamped<LinkDescription>> e : linkDescriptions.entrySet()) { |
| 437 | if (primaryProviderId.equals(e.getKey())) { |
| 438 | continue; |
| 439 | } |
| 440 | |
| 441 | // TODO: should keep track of Description timestamp |
| 442 | // and only merge conflicting keys when timestamp is newer |
| 443 | // Currently assuming there will never be a key conflict between |
| 444 | // providers |
| 445 | |
| 446 | // annotation merging. not so efficient, should revisit later |
| 447 | annotations = merge(annotations, e.getValue().value().annotations()); |
| 448 | } |
| 449 | |
| 450 | return new DefaultLink(primaryProviderId , src, dst, type, annotations); |
| 451 | } |
| 452 | |
| 453 | private ConcurrentMap<ProviderId, Timestamped<LinkDescription>> getLinkDescriptions(LinkKey key) { |
| 454 | return ConcurrentUtils.createIfAbsentUnchecked(linkDescs, key, |
| 455 | NewConcurrentHashMap.<ProviderId, Timestamped<LinkDescription>>ifNeeded()); |
| 456 | } |
| 457 | |
Madan Jampani | a97e820 | 2014-10-10 17:01:33 -0700 | [diff] [blame] | 458 | private Timestamped<LinkDescription> getLinkDescription(LinkKey key, ProviderId providerId) { |
| 459 | return getLinkDescriptions(key).get(providerId); |
| 460 | } |
| 461 | |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 462 | private final Function<LinkKey, Link> lookupLink = new LookupLink(); |
| 463 | private Function<LinkKey, Link> lookupLink() { |
| 464 | return lookupLink; |
| 465 | } |
| 466 | |
| 467 | private final class LookupLink implements Function<LinkKey, Link> { |
| 468 | @Override |
| 469 | public Link apply(LinkKey input) { |
| 470 | return links.get(input); |
| 471 | } |
| 472 | } |
| 473 | |
| 474 | private static final Predicate<Provided> IS_PRIMARY = new IsPrimary(); |
| 475 | private static final Predicate<Provided> isPrimary() { |
| 476 | return IS_PRIMARY; |
| 477 | } |
| 478 | |
| 479 | private static final class IsPrimary implements Predicate<Provided> { |
| 480 | |
| 481 | @Override |
| 482 | public boolean apply(Provided input) { |
| 483 | return !input.providerId().isAncillary(); |
| 484 | } |
| 485 | } |
| 486 | |
| 487 | private void notifyDelegateIfNotNull(LinkEvent event) { |
| 488 | if (event != null) { |
| 489 | notifyDelegate(event); |
| 490 | } |
| 491 | } |
| 492 | |
| 493 | // TODO: should we be throwing exception? |
| 494 | private void broadcastMessage(MessageSubject subject, Object event) throws IOException { |
| 495 | ClusterMessage message = new ClusterMessage( |
| 496 | clusterService.getLocalNode().id(), |
| 497 | subject, |
| 498 | SERIALIZER.encode(event)); |
| 499 | clusterCommunicator.broadcast(message); |
| 500 | } |
| 501 | |
Madan Jampani | a97e820 | 2014-10-10 17:01:33 -0700 | [diff] [blame] | 502 | // TODO: should we be throwing exception? |
| 503 | private void unicastMessage(NodeId recipient, MessageSubject subject, Object event) { |
| 504 | try { |
| 505 | ClusterMessage message = new ClusterMessage( |
| 506 | clusterService.getLocalNode().id(), |
| 507 | subject, |
| 508 | SERIALIZER.encode(event)); |
| 509 | clusterCommunicator.unicast(message, recipient); |
| 510 | } catch (IOException e) { |
| 511 | log.error("Failed to send a {} message to {}", subject.value(), recipient); |
| 512 | } |
| 513 | } |
| 514 | |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 515 | private void notifyPeers(InternalLinkEvent event) throws IOException { |
| 516 | broadcastMessage(GossipLinkStoreMessageSubjects.LINK_UPDATE, event); |
| 517 | } |
| 518 | |
| 519 | private void notifyPeers(InternalLinkRemovedEvent event) throws IOException { |
| 520 | broadcastMessage(GossipLinkStoreMessageSubjects.LINK_REMOVED, event); |
| 521 | } |
| 522 | |
Madan Jampani | a97e820 | 2014-10-10 17:01:33 -0700 | [diff] [blame] | 523 | private void notifyPeer(NodeId peer, InternalLinkEvent event) { |
| 524 | unicastMessage(peer, GossipLinkStoreMessageSubjects.LINK_UPDATE, event); |
| 525 | } |
| 526 | |
| 527 | private void notifyPeer(NodeId peer, InternalLinkRemovedEvent event) { |
| 528 | unicastMessage(peer, GossipLinkStoreMessageSubjects.LINK_REMOVED, event); |
| 529 | } |
| 530 | |
| 531 | private final class SendAdvertisementTask implements Runnable { |
| 532 | |
| 533 | @Override |
| 534 | public void run() { |
| 535 | if (Thread.currentThread().isInterrupted()) { |
| 536 | log.info("Interrupted, quitting"); |
| 537 | return; |
| 538 | } |
| 539 | |
| 540 | try { |
| 541 | final NodeId self = clusterService.getLocalNode().id(); |
| 542 | Set<ControllerNode> nodes = clusterService.getNodes(); |
| 543 | |
| 544 | ImmutableList<NodeId> nodeIds = FluentIterable.from(nodes) |
| 545 | .transform(toNodeId()) |
| 546 | .toList(); |
| 547 | |
| 548 | if (nodeIds.size() == 1 && nodeIds.get(0).equals(self)) { |
Yuta HIGUCHI | 3708308 | 2014-10-13 10:38:38 -0700 | [diff] [blame] | 549 | log.debug("No other peers in the cluster."); |
Madan Jampani | a97e820 | 2014-10-10 17:01:33 -0700 | [diff] [blame] | 550 | return; |
| 551 | } |
| 552 | |
| 553 | NodeId peer; |
| 554 | do { |
| 555 | int idx = RandomUtils.nextInt(0, nodeIds.size()); |
| 556 | peer = nodeIds.get(idx); |
| 557 | } while (peer.equals(self)); |
| 558 | |
| 559 | LinkAntiEntropyAdvertisement ad = createAdvertisement(); |
| 560 | |
| 561 | if (Thread.currentThread().isInterrupted()) { |
| 562 | log.info("Interrupted, quitting"); |
| 563 | return; |
| 564 | } |
| 565 | |
| 566 | try { |
| 567 | unicastMessage(peer, GossipLinkStoreMessageSubjects.LINK_ANTI_ENTROPY_ADVERTISEMENT, ad); |
| 568 | } catch (Exception e) { |
| 569 | log.error("Failed to send anti-entropy advertisement", e); |
| 570 | return; |
| 571 | } |
| 572 | } catch (Exception e) { |
| 573 | // catch all Exception to avoid Scheduled task being suppressed. |
| 574 | log.error("Exception thrown while sending advertisement", e); |
| 575 | } |
| 576 | } |
| 577 | } |
| 578 | |
| 579 | private LinkAntiEntropyAdvertisement createAdvertisement() { |
| 580 | final NodeId self = clusterService.getLocalNode().id(); |
| 581 | |
| 582 | Map<LinkFragmentId, Timestamp> linkTimestamps = new HashMap<>(linkDescs.size()); |
| 583 | Map<LinkKey, Timestamp> linkTombstones = new HashMap<>(removedLinks.size()); |
| 584 | |
| 585 | for (Entry<LinkKey, ConcurrentMap<ProviderId, Timestamped<LinkDescription>>> |
| 586 | provs : linkDescs.entrySet()) { |
| 587 | |
| 588 | final LinkKey linkKey = provs.getKey(); |
| 589 | final ConcurrentMap<ProviderId, Timestamped<LinkDescription>> linkDesc = provs.getValue(); |
| 590 | synchronized (linkDesc) { |
| 591 | for (Map.Entry<ProviderId, Timestamped<LinkDescription>> e : linkDesc.entrySet()) { |
| 592 | linkTimestamps.put(new LinkFragmentId(linkKey, e.getKey()), e.getValue().timestamp()); |
| 593 | } |
| 594 | } |
| 595 | } |
| 596 | |
| 597 | linkTombstones.putAll(removedLinks); |
| 598 | |
| 599 | return new LinkAntiEntropyAdvertisement(self, linkTimestamps, linkTombstones); |
| 600 | } |
| 601 | |
| 602 | private void handleAntiEntropyAdvertisement(LinkAntiEntropyAdvertisement advertisement) { |
| 603 | |
| 604 | NodeId peer = advertisement.sender(); |
| 605 | |
| 606 | Map<LinkFragmentId, Timestamp> linkTimestamps = advertisement.linkTimestamps(); |
| 607 | Map<LinkKey, Timestamp> linkTombstones = advertisement.linkTombstones(); |
| 608 | for (Map.Entry<LinkFragmentId, Timestamp> entry : linkTimestamps.entrySet()) { |
| 609 | LinkFragmentId linkFragmentId = entry.getKey(); |
| 610 | Timestamp peerTimestamp = entry.getValue(); |
| 611 | |
| 612 | LinkKey key = linkFragmentId.linkKey(); |
| 613 | ProviderId providerId = linkFragmentId.providerId(); |
| 614 | |
| 615 | Timestamped<LinkDescription> linkDescription = getLinkDescription(key, providerId); |
| 616 | if (linkDescription.isNewer(peerTimestamp)) { |
| 617 | // I have more recent link description. update peer. |
| 618 | notifyPeer(peer, new InternalLinkEvent(providerId, linkDescription)); |
| 619 | } |
| 620 | // else TODO: Peer has more recent link description. request it. |
| 621 | |
| 622 | Timestamp linkRemovedTimestamp = removedLinks.get(key); |
| 623 | if (linkRemovedTimestamp != null && linkRemovedTimestamp.compareTo(peerTimestamp) > 0) { |
| 624 | // peer has a zombie link. update peer. |
| 625 | notifyPeer(peer, new InternalLinkRemovedEvent(key, linkRemovedTimestamp)); |
| 626 | } |
| 627 | } |
| 628 | |
| 629 | for (Map.Entry<LinkKey, Timestamp> entry : linkTombstones.entrySet()) { |
| 630 | LinkKey key = entry.getKey(); |
| 631 | Timestamp peerTimestamp = entry.getValue(); |
| 632 | |
| 633 | ProviderId primaryProviderId = pickPrimaryProviderId(getLinkDescriptions(key)); |
| 634 | if (primaryProviderId != null) { |
| 635 | if (!getLinkDescription(key, primaryProviderId).isNewer(peerTimestamp)) { |
| 636 | notifyDelegateIfNotNull(removeLinkInternal(key, peerTimestamp)); |
| 637 | } |
| 638 | } |
| 639 | } |
| 640 | } |
| 641 | |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 642 | private class InternalLinkEventListener implements ClusterMessageHandler { |
| 643 | @Override |
| 644 | public void handle(ClusterMessage message) { |
| 645 | |
| 646 | log.info("Received link event from peer: {}", message.sender()); |
| 647 | InternalLinkEvent event = (InternalLinkEvent) SERIALIZER.decode(message.payload()); |
| 648 | |
| 649 | ProviderId providerId = event.providerId(); |
| 650 | Timestamped<LinkDescription> linkDescription = event.linkDescription(); |
| 651 | |
| 652 | notifyDelegateIfNotNull(createOrUpdateLinkInternal(providerId, linkDescription)); |
| 653 | } |
| 654 | } |
| 655 | |
| 656 | private class InternalLinkRemovedEventListener implements ClusterMessageHandler { |
| 657 | @Override |
| 658 | public void handle(ClusterMessage message) { |
| 659 | |
| 660 | log.info("Received link removed event from peer: {}", message.sender()); |
| 661 | InternalLinkRemovedEvent event = (InternalLinkRemovedEvent) SERIALIZER.decode(message.payload()); |
| 662 | |
| 663 | LinkKey linkKey = event.linkKey(); |
| 664 | Timestamp timestamp = event.timestamp(); |
| 665 | |
| 666 | notifyDelegateIfNotNull(removeLinkInternal(linkKey, timestamp)); |
| 667 | } |
| 668 | } |
Madan Jampani | a97e820 | 2014-10-10 17:01:33 -0700 | [diff] [blame] | 669 | |
| 670 | private final class InternalLinkAntiEntropyAdvertisementListener implements ClusterMessageHandler { |
| 671 | |
| 672 | @Override |
| 673 | public void handle(ClusterMessage message) { |
Yuta HIGUCHI | 9a0a1d1 | 2014-10-13 22:38:02 -0700 | [diff] [blame^] | 674 | log.debug("Received Link Anti-Entropy advertisement from peer: {}", message.sender()); |
Madan Jampani | a97e820 | 2014-10-10 17:01:33 -0700 | [diff] [blame] | 675 | LinkAntiEntropyAdvertisement advertisement = SERIALIZER.decode(message.payload()); |
| 676 | handleAntiEntropyAdvertisement(advertisement); |
| 677 | } |
| 678 | } |
Madan Jampani | 2ff0559 | 2014-10-10 15:42:47 -0700 | [diff] [blame] | 679 | } |