wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 1 | /* |
Brian O'Connor | 5ab426f | 2016-04-09 01:19:45 -0700 | [diff] [blame] | 2 | * Copyright 2015-present Open Networking Laboratory |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 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 | */ |
Thomas Vachuska | bf916ea | 2015-05-20 18:24:34 -0700 | [diff] [blame] | 16 | package org.onosproject.incubator.net.tunnel.impl; |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 17 | |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 18 | import org.apache.felix.scr.annotations.Activate; |
| 19 | import org.apache.felix.scr.annotations.Component; |
| 20 | import org.apache.felix.scr.annotations.Deactivate; |
| 21 | import org.apache.felix.scr.annotations.Reference; |
| 22 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 23 | import org.apache.felix.scr.annotations.Service; |
Thomas Vachuska | 42e8cce | 2015-07-29 19:25:18 -0700 | [diff] [blame] | 24 | import org.onosproject.net.provider.AbstractListenerProviderRegistry; |
jcc | 4a20a5f | 2015-04-30 15:43:39 +0800 | [diff] [blame] | 25 | import org.onosproject.core.ApplicationId; |
Thomas Vachuska | bf916ea | 2015-05-20 18:24:34 -0700 | [diff] [blame] | 26 | import org.onosproject.incubator.net.tunnel.DefaultTunnel; |
samuel | 7a5691a | 2015-05-23 00:36:32 +0800 | [diff] [blame] | 27 | import org.onosproject.incubator.net.tunnel.Tunnel; |
Avantika-Huawei | 1e0a586 | 2016-04-04 14:22:22 +0530 | [diff] [blame] | 28 | import org.onosproject.incubator.net.tunnel.Tunnel.State; |
Thomas Vachuska | 42e8cce | 2015-07-29 19:25:18 -0700 | [diff] [blame] | 29 | import org.onosproject.incubator.net.tunnel.Tunnel.Type; |
Thomas Vachuska | bf916ea | 2015-05-20 18:24:34 -0700 | [diff] [blame] | 30 | import org.onosproject.incubator.net.tunnel.TunnelAdminService; |
| 31 | import org.onosproject.incubator.net.tunnel.TunnelDescription; |
| 32 | import org.onosproject.incubator.net.tunnel.TunnelEndPoint; |
| 33 | import org.onosproject.incubator.net.tunnel.TunnelEvent; |
| 34 | import org.onosproject.incubator.net.tunnel.TunnelId; |
| 35 | import org.onosproject.incubator.net.tunnel.TunnelListener; |
| 36 | import org.onosproject.incubator.net.tunnel.TunnelName; |
| 37 | import org.onosproject.incubator.net.tunnel.TunnelProvider; |
| 38 | import org.onosproject.incubator.net.tunnel.TunnelProviderRegistry; |
| 39 | import org.onosproject.incubator.net.tunnel.TunnelProviderService; |
| 40 | import org.onosproject.incubator.net.tunnel.TunnelService; |
| 41 | import org.onosproject.incubator.net.tunnel.TunnelStore; |
| 42 | import org.onosproject.incubator.net.tunnel.TunnelStoreDelegate; |
| 43 | import org.onosproject.incubator.net.tunnel.TunnelSubscription; |
samuel | 7a5691a | 2015-05-23 00:36:32 +0800 | [diff] [blame] | 44 | import org.onosproject.net.Annotations; |
cheng fan | 35dc0f2 | 2015-06-10 06:02:47 +0800 | [diff] [blame] | 45 | import org.onosproject.net.DeviceId; |
samuel | 7a5691a | 2015-05-23 00:36:32 +0800 | [diff] [blame] | 46 | import org.onosproject.net.Path; |
samuel | 7a5691a | 2015-05-23 00:36:32 +0800 | [diff] [blame] | 47 | import org.onosproject.net.provider.AbstractProviderService; |
| 48 | import org.onosproject.net.provider.ProviderId; |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 49 | import org.slf4j.Logger; |
| 50 | |
Thomas Vachuska | 42e8cce | 2015-07-29 19:25:18 -0700 | [diff] [blame] | 51 | import java.util.Collection; |
| 52 | import java.util.Collections; |
| 53 | import java.util.Set; |
| 54 | |
| 55 | import static com.google.common.base.Preconditions.checkNotNull; |
| 56 | import static org.slf4j.LoggerFactory.getLogger; |
| 57 | |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 58 | /** |
| 59 | * Provides implementation of the tunnel NB/SB APIs. |
| 60 | */ |
| 61 | @Component(immediate = true, enabled = true) |
| 62 | @Service |
jcc | 4a20a5f | 2015-04-30 15:43:39 +0800 | [diff] [blame] | 63 | public class TunnelManager |
Thomas Vachuska | 42e8cce | 2015-07-29 19:25:18 -0700 | [diff] [blame] | 64 | extends AbstractListenerProviderRegistry<TunnelEvent, TunnelListener, |
| 65 | TunnelProvider, TunnelProviderService> |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 66 | implements TunnelService, TunnelAdminService, TunnelProviderRegistry { |
| 67 | |
| 68 | private static final String TUNNNEL_ID_NULL = "Tunnel ID cannot be null"; |
| 69 | |
| 70 | private final Logger log = getLogger(getClass()); |
| 71 | |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 72 | private final TunnelStoreDelegate delegate = new InternalStoreDelegate(); |
jcc | d869723 | 2015-05-05 14:42:23 +0800 | [diff] [blame] | 73 | |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 74 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 75 | protected TunnelStore store; |
| 76 | |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 77 | |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 78 | @Activate |
| 79 | public void activate() { |
jcc | d869723 | 2015-05-05 14:42:23 +0800 | [diff] [blame] | 80 | store.setDelegate(delegate); |
| 81 | eventDispatcher.addSink(TunnelEvent.class, listenerRegistry); |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 82 | log.info("Started"); |
| 83 | } |
| 84 | |
| 85 | @Deactivate |
| 86 | public void deactivate() { |
jcc | d869723 | 2015-05-05 14:42:23 +0800 | [diff] [blame] | 87 | store.unsetDelegate(delegate); |
| 88 | eventDispatcher.removeSink(TunnelEvent.class); |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 89 | log.info("Stopped"); |
| 90 | } |
| 91 | |
| 92 | @Override |
jcc | d869723 | 2015-05-05 14:42:23 +0800 | [diff] [blame] | 93 | public void removeTunnel(TunnelId tunnelId) { |
| 94 | checkNotNull(tunnelId, TUNNNEL_ID_NULL); |
| 95 | store.deleteTunnel(tunnelId); |
| 96 | Tunnel tunnel = store.queryTunnel(tunnelId); |
| 97 | if (tunnel.providerId() != null) { |
| 98 | TunnelProvider provider = getProvider(tunnel.providerId()); |
| 99 | if (provider != null) { |
| 100 | provider.releaseTunnel(tunnel); |
| 101 | } |
| 102 | } else { |
| 103 | Set<ProviderId> ids = getProviders(); |
| 104 | for (ProviderId providerId : ids) { |
| 105 | TunnelProvider provider = getProvider(providerId); |
| 106 | provider.releaseTunnel(tunnel); |
| 107 | } |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | @Override |
| 112 | public void updateTunnel(Tunnel tunnel, Path path) { |
| 113 | store.createOrUpdateTunnel(tunnel); |
| 114 | if (tunnel.providerId() != null) { |
| 115 | TunnelProvider provider = getProvider(tunnel.providerId()); |
| 116 | if (provider != null) { |
| 117 | provider.updateTunnel(tunnel, path); |
| 118 | } |
| 119 | } else { |
| 120 | Set<ProviderId> ids = getProviders(); |
| 121 | for (ProviderId providerId : ids) { |
| 122 | TunnelProvider provider = getProvider(providerId); |
| 123 | provider.updateTunnel(tunnel, path); |
| 124 | } |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | @Override |
| 129 | public void removeTunnels(TunnelEndPoint src, TunnelEndPoint dst, |
| 130 | ProviderId producerName) { |
| 131 | store.deleteTunnel(src, dst, producerName); |
| 132 | Collection<Tunnel> setTunnels = store.queryTunnel(src, dst); |
| 133 | for (Tunnel tunnel : setTunnels) { |
| 134 | if (producerName != null |
| 135 | && !tunnel.providerId().equals(producerName)) { |
| 136 | continue; |
| 137 | } |
| 138 | if (tunnel.providerId() != null) { |
| 139 | TunnelProvider provider = getProvider(tunnel.providerId()); |
| 140 | if (provider != null) { |
| 141 | provider.releaseTunnel(tunnel); |
| 142 | } |
| 143 | } else { |
| 144 | Set<ProviderId> ids = getProviders(); |
| 145 | for (ProviderId providerId : ids) { |
| 146 | TunnelProvider provider = getProvider(providerId); |
| 147 | provider.releaseTunnel(tunnel); |
| 148 | } |
| 149 | } |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | @Override |
| 154 | public void removeTunnels(TunnelEndPoint src, TunnelEndPoint dst, Type type, |
| 155 | ProviderId producerName) { |
| 156 | store.deleteTunnel(src, dst, type, producerName); |
| 157 | Collection<Tunnel> setTunnels = store.queryTunnel(src, dst); |
| 158 | for (Tunnel tunnel : setTunnels) { |
| 159 | if (producerName != null |
| 160 | && !tunnel.providerId().equals(producerName) |
| 161 | || !type.equals(tunnel.type())) { |
| 162 | continue; |
| 163 | } |
| 164 | if (tunnel.providerId() != null) { |
| 165 | TunnelProvider provider = getProvider(tunnel.providerId()); |
| 166 | if (provider != null) { |
| 167 | provider.releaseTunnel(tunnel); |
| 168 | } |
| 169 | } else { |
| 170 | Set<ProviderId> ids = getProviders(); |
| 171 | for (ProviderId providerId : ids) { |
| 172 | TunnelProvider provider = getProvider(providerId); |
| 173 | provider.releaseTunnel(tunnel); |
| 174 | } |
| 175 | } |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | @Override |
| 180 | public Tunnel borrowTunnel(ApplicationId consumerId, TunnelId tunnelId, |
| 181 | Annotations... annotations) { |
| 182 | return store.borrowTunnel(consumerId, tunnelId, annotations); |
| 183 | } |
| 184 | |
| 185 | @Override |
| 186 | public Collection<Tunnel> borrowTunnel(ApplicationId consumerId, |
| 187 | TunnelName tunnelName, |
| 188 | Annotations... annotations) { |
| 189 | return store.borrowTunnel(consumerId, tunnelName, annotations); |
| 190 | } |
| 191 | |
| 192 | @Override |
| 193 | public Collection<Tunnel> borrowTunnel(ApplicationId consumerId, |
| 194 | TunnelEndPoint src, TunnelEndPoint dst, |
| 195 | Annotations... annotations) { |
| 196 | Collection<Tunnel> tunnels = store.borrowTunnel(consumerId, src, |
| 197 | dst, annotations); |
| 198 | if (tunnels == null || tunnels.size() == 0) { |
| 199 | Tunnel tunnel = new DefaultTunnel(null, src, dst, null, null, null, |
| 200 | null, null, annotations); |
| 201 | Set<ProviderId> ids = getProviders(); |
| 202 | for (ProviderId providerId : ids) { |
| 203 | TunnelProvider provider = getProvider(providerId); |
| 204 | provider.setupTunnel(tunnel, null); |
| 205 | } |
| 206 | } |
| 207 | return tunnels; |
| 208 | } |
| 209 | |
| 210 | @Override |
| 211 | public Collection<Tunnel> borrowTunnel(ApplicationId consumerId, |
| 212 | TunnelEndPoint src, TunnelEndPoint dst, |
| 213 | Type type, Annotations... annotations) { |
| 214 | Collection<Tunnel> tunnels = store.borrowTunnel(consumerId, src, |
| 215 | dst, type, |
| 216 | annotations); |
| 217 | if (tunnels == null || tunnels.size() == 0) { |
| 218 | Tunnel tunnel = new DefaultTunnel(null, src, dst, type, null, null, |
| 219 | null, null, annotations); |
| 220 | Set<ProviderId> ids = getProviders(); |
| 221 | for (ProviderId providerId : ids) { |
| 222 | TunnelProvider provider = getProvider(providerId); |
| 223 | provider.setupTunnel(tunnel, null); |
| 224 | } |
| 225 | } |
| 226 | return tunnels; |
| 227 | } |
| 228 | |
| 229 | @Override |
| 230 | public boolean returnTunnel(ApplicationId consumerId, |
| 231 | TunnelId tunnelId, Annotations... annotations) { |
| 232 | return store.returnTunnel(consumerId, tunnelId, annotations); |
| 233 | } |
| 234 | |
| 235 | @Override |
| 236 | public boolean returnTunnel(ApplicationId consumerId, |
| 237 | TunnelName tunnelName, |
| 238 | Annotations... annotations) { |
| 239 | return store.returnTunnel(consumerId, tunnelName, annotations); |
| 240 | } |
| 241 | |
| 242 | @Override |
| 243 | public boolean returnTunnel(ApplicationId consumerId, TunnelEndPoint src, |
| 244 | TunnelEndPoint dst, Type type, |
| 245 | Annotations... annotations) { |
| 246 | return store.returnTunnel(consumerId, src, dst, type, annotations); |
| 247 | } |
| 248 | |
| 249 | @Override |
| 250 | public boolean returnTunnel(ApplicationId consumerId, TunnelEndPoint src, |
| 251 | TunnelEndPoint dst, Annotations... annotations) { |
| 252 | return store.returnTunnel(consumerId, src, dst, annotations); |
| 253 | } |
| 254 | |
| 255 | @Override |
| 256 | public Tunnel queryTunnel(TunnelId tunnelId) { |
| 257 | return store.queryTunnel(tunnelId); |
| 258 | } |
| 259 | |
| 260 | @Override |
| 261 | public Collection<TunnelSubscription> queryTunnelSubscription(ApplicationId consumerId) { |
| 262 | return store.queryTunnelSubscription(consumerId); |
| 263 | } |
| 264 | |
| 265 | @Override |
| 266 | public Collection<Tunnel> queryTunnel(Type type) { |
| 267 | return store.queryTunnel(type); |
| 268 | } |
| 269 | |
| 270 | @Override |
| 271 | public Collection<Tunnel> queryTunnel(TunnelEndPoint src, TunnelEndPoint dst) { |
| 272 | return store.queryTunnel(src, dst); |
| 273 | } |
| 274 | |
samuel | 7a5691a | 2015-05-23 00:36:32 +0800 | [diff] [blame] | 275 | |
| 276 | @Override |
| 277 | public Collection<Tunnel> queryAllTunnels() { |
| 278 | return store.queryAllTunnels(); |
| 279 | } |
| 280 | |
jcc | d869723 | 2015-05-05 14:42:23 +0800 | [diff] [blame] | 281 | @Override |
| 282 | public int tunnelCount() { |
| 283 | return store.tunnelCount(); |
| 284 | } |
| 285 | |
| 286 | @Override |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 287 | protected TunnelProviderService createProviderService(TunnelProvider provider) { |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 288 | return new InternalTunnelProviderService(provider); |
| 289 | } |
| 290 | |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 291 | private class InternalTunnelProviderService |
| 292 | extends AbstractProviderService<TunnelProvider> |
| 293 | implements TunnelProviderService { |
| 294 | protected InternalTunnelProviderService(TunnelProvider provider) { |
| 295 | super(provider); |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 296 | } |
| 297 | |
jcc | d869723 | 2015-05-05 14:42:23 +0800 | [diff] [blame] | 298 | |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 299 | @Override |
jcc | 4a20a5f | 2015-04-30 15:43:39 +0800 | [diff] [blame] | 300 | public TunnelId tunnelAdded(TunnelDescription tunnel) { |
jcc | d869723 | 2015-05-05 14:42:23 +0800 | [diff] [blame] | 301 | Tunnel storedTunnel = new DefaultTunnel(provider().id(), |
| 302 | tunnel.src(), tunnel.dst(), |
| 303 | tunnel.type(), |
| 304 | tunnel.groupId(), |
| 305 | tunnel.id(), |
| 306 | tunnel.tunnelName(), |
samuel | 7a5691a | 2015-05-23 00:36:32 +0800 | [diff] [blame] | 307 | tunnel.path(), |
jcc | d869723 | 2015-05-05 14:42:23 +0800 | [diff] [blame] | 308 | tunnel.annotations()); |
| 309 | return store.createOrUpdateTunnel(storedTunnel); |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 310 | } |
| 311 | |
| 312 | @Override |
Avantika-Huawei | 1e0a586 | 2016-04-04 14:22:22 +0530 | [diff] [blame] | 313 | public TunnelId tunnelAdded(TunnelDescription tunnel, State state) { |
| 314 | Tunnel storedTunnel = new DefaultTunnel(provider().id(), |
| 315 | tunnel.src(), tunnel.dst(), |
| 316 | tunnel.type(), |
| 317 | state, |
| 318 | tunnel.groupId(), |
| 319 | tunnel.id(), |
| 320 | tunnel.tunnelName(), |
| 321 | tunnel.path(), |
| 322 | tunnel.annotations()); |
| 323 | return store.createOrUpdateTunnel(storedTunnel); |
| 324 | } |
| 325 | |
| 326 | @Override |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 327 | public void tunnelUpdated(TunnelDescription tunnel) { |
jcc | d869723 | 2015-05-05 14:42:23 +0800 | [diff] [blame] | 328 | Tunnel storedTunnel = new DefaultTunnel(provider().id(), |
| 329 | tunnel.src(), tunnel.dst(), |
| 330 | tunnel.type(), |
| 331 | tunnel.groupId(), |
| 332 | tunnel.id(), |
| 333 | tunnel.tunnelName(), |
samuel | 7a5691a | 2015-05-23 00:36:32 +0800 | [diff] [blame] | 334 | tunnel.path(), |
jcc | d869723 | 2015-05-05 14:42:23 +0800 | [diff] [blame] | 335 | tunnel.annotations()); |
| 336 | store.createOrUpdateTunnel(storedTunnel); |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 337 | } |
| 338 | |
| 339 | @Override |
Avantika-Huawei | 4c3c997 | 2016-04-05 14:51:46 +0530 | [diff] [blame] | 340 | public void tunnelUpdated(TunnelDescription tunnel, State state) { |
| 341 | Tunnel storedTunnel = new DefaultTunnel(provider().id(), |
| 342 | tunnel.src(), tunnel.dst(), |
| 343 | tunnel.type(), |
| 344 | state, |
| 345 | tunnel.groupId(), |
| 346 | tunnel.id(), |
| 347 | tunnel.tunnelName(), |
| 348 | tunnel.path(), |
| 349 | tunnel.annotations()); |
| 350 | store.createOrUpdateTunnel(storedTunnel, state); |
| 351 | } |
| 352 | |
| 353 | @Override |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 354 | public void tunnelRemoved(TunnelDescription tunnel) { |
jcc | d869723 | 2015-05-05 14:42:23 +0800 | [diff] [blame] | 355 | if (tunnel.id() != null) { |
| 356 | store.deleteTunnel(tunnel.id()); |
samuel | 7a5691a | 2015-05-23 00:36:32 +0800 | [diff] [blame] | 357 | return; |
jcc | d869723 | 2015-05-05 14:42:23 +0800 | [diff] [blame] | 358 | } |
| 359 | if (tunnel.src() != null && tunnel.dst() != null |
| 360 | && tunnel.type() != null) { |
| 361 | store.deleteTunnel(tunnel.src(), tunnel.dst(), tunnel.type(), |
| 362 | provider().id()); |
samuel | 7a5691a | 2015-05-23 00:36:32 +0800 | [diff] [blame] | 363 | return; |
jcc | d869723 | 2015-05-05 14:42:23 +0800 | [diff] [blame] | 364 | } |
| 365 | if (tunnel.src() != null && tunnel.dst() != null |
| 366 | && tunnel.type() == null) { |
| 367 | store.deleteTunnel(tunnel.src(), tunnel.dst(), provider().id()); |
samuel | 7a5691a | 2015-05-23 00:36:32 +0800 | [diff] [blame] | 368 | return; |
jcc | d869723 | 2015-05-05 14:42:23 +0800 | [diff] [blame] | 369 | } |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 370 | } |
| 371 | |
samuel | 7a5691a | 2015-05-23 00:36:32 +0800 | [diff] [blame] | 372 | |
| 373 | @Override |
| 374 | public Tunnel tunnelQueryById(TunnelId tunnelId) { |
| 375 | return store.queryTunnel(tunnelId); |
| 376 | } |
| 377 | |
| 378 | |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 379 | } |
| 380 | |
| 381 | private class InternalStoreDelegate implements TunnelStoreDelegate { |
| 382 | @Override |
| 383 | public void notify(TunnelEvent event) { |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 384 | if (event != null) { |
Thomas Vachuska | 42e8cce | 2015-07-29 19:25:18 -0700 | [diff] [blame] | 385 | post(event); |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 386 | } |
| 387 | } |
| 388 | } |
samuel | 7a5691a | 2015-05-23 00:36:32 +0800 | [diff] [blame] | 389 | |
cheng fan | 35dc0f2 | 2015-06-10 06:02:47 +0800 | [diff] [blame] | 390 | @Override |
| 391 | public Iterable<Tunnel> getTunnels(DeviceId deviceId) { |
| 392 | return Collections.emptyList(); |
| 393 | } |
| 394 | |
wei wei | 89ddc32 | 2015-03-22 16:29:04 -0500 | [diff] [blame] | 395 | } |