HIGUCHI Yuta | 15653fd | 2015-11-09 11:05:09 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2015 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 | */ |
| 16 | package org.onosproject.incubator.rpc.grpc; |
| 17 | |
| 18 | import static com.google.common.base.Preconditions.checkNotNull; |
| 19 | import static java.util.stream.Collectors.toList; |
| 20 | import static org.onosproject.incubator.rpc.grpc.GrpcDeviceUtils.translate; |
| 21 | import static org.onosproject.net.DeviceId.deviceId; |
| 22 | |
| 23 | import java.io.IOException; |
| 24 | import java.util.Set; |
| 25 | import java.util.concurrent.CompletableFuture; |
| 26 | import java.util.concurrent.ExecutionException; |
| 27 | import java.util.concurrent.TimeUnit; |
| 28 | import java.util.concurrent.TimeoutException; |
| 29 | import java.util.concurrent.atomic.AtomicInteger; |
| 30 | |
| 31 | import org.apache.felix.scr.annotations.Activate; |
| 32 | import org.apache.felix.scr.annotations.Component; |
| 33 | import org.apache.felix.scr.annotations.Deactivate; |
| 34 | import org.apache.felix.scr.annotations.Modified; |
| 35 | import org.apache.felix.scr.annotations.Property; |
| 36 | import org.apache.felix.scr.annotations.Reference; |
| 37 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 38 | import org.onosproject.grpc.Device.DeviceConnected; |
| 39 | import org.onosproject.grpc.Device.DeviceDisconnected; |
| 40 | import org.onosproject.grpc.Device.DeviceProviderMsg; |
| 41 | import org.onosproject.grpc.Device.DeviceProviderServiceMsg; |
| 42 | import org.onosproject.grpc.Device.IsReachableResponse; |
| 43 | import org.onosproject.grpc.Device.PortStatusChanged; |
| 44 | import org.onosproject.grpc.Device.ReceivedRoleReply; |
| 45 | import org.onosproject.grpc.Device.RegisterProvider; |
| 46 | import org.onosproject.grpc.Device.UpdatePortStatistics; |
| 47 | import org.onosproject.grpc.Device.UpdatePorts; |
| 48 | import org.onosproject.grpc.DeviceProviderRegistryRpcGrpc; |
| 49 | import org.onosproject.grpc.DeviceProviderRegistryRpcGrpc.DeviceProviderRegistryRpc; |
| 50 | import org.onosproject.net.DeviceId; |
| 51 | import org.onosproject.net.MastershipRole; |
| 52 | import org.onosproject.net.device.DeviceProvider; |
| 53 | import org.onosproject.net.device.DeviceProviderRegistry; |
| 54 | import org.onosproject.net.device.DeviceProviderService; |
| 55 | import org.onosproject.net.provider.ProviderId; |
| 56 | import org.osgi.service.component.ComponentContext; |
| 57 | import org.slf4j.Logger; |
| 58 | import org.slf4j.LoggerFactory; |
| 59 | |
| 60 | import com.google.common.cache.Cache; |
| 61 | import com.google.common.cache.CacheBuilder; |
| 62 | import com.google.common.collect.Sets; |
| 63 | |
| 64 | import io.grpc.Server; |
| 65 | import io.grpc.netty.NettyServerBuilder; |
| 66 | import io.grpc.stub.StreamObserver; |
| 67 | |
| 68 | // gRPC Server on Metro-side |
| 69 | // Translates request received on RPC channel, and calls corresponding Service on |
| 70 | // Metro-ONOS cluster. |
| 71 | /** |
| 72 | * Server side implementation of gRPC based RemoteService. |
| 73 | */ |
| 74 | @Component(immediate = true) |
| 75 | public class GrpcRemoteServiceServer { |
| 76 | |
| 77 | private static final String RPC_PROVIDER_NAME = "org.onosproject.rpc.provider.grpc"; |
| 78 | |
| 79 | // TODO pick a number |
| 80 | public static final int DEFAULT_LISTEN_PORT = 11984; |
| 81 | |
| 82 | private final Logger log = LoggerFactory.getLogger(getClass()); |
| 83 | |
| 84 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 85 | protected DeviceProviderRegistry deviceProviderRegistry; |
| 86 | |
| 87 | |
| 88 | @Property(name = "listenPort", intValue = DEFAULT_LISTEN_PORT, |
| 89 | label = "Port to listen on") |
| 90 | protected int listenPort = DEFAULT_LISTEN_PORT; |
| 91 | |
| 92 | private Server server; |
| 93 | private final Set<DeviceProviderServerProxy> registeredProviders = Sets.newConcurrentHashSet(); |
| 94 | |
| 95 | @Activate |
| 96 | protected void activate(ComponentContext context) throws IOException { |
| 97 | modified(context); |
| 98 | |
| 99 | log.debug("Server starting on {}", listenPort); |
| 100 | try { |
| 101 | server = NettyServerBuilder.forPort(listenPort) |
| 102 | .addService(DeviceProviderRegistryRpcGrpc.bindService(new DeviceProviderRegistryServerProxy())) |
| 103 | .build().start(); |
| 104 | } catch (IOException e) { |
| 105 | log.error("Failed to start gRPC server", e); |
| 106 | throw e; |
| 107 | } |
| 108 | |
| 109 | log.info("Started on {}", listenPort); |
| 110 | } |
| 111 | |
| 112 | @Deactivate |
| 113 | protected void deactivate() { |
| 114 | |
| 115 | registeredProviders.stream() |
| 116 | .forEach(deviceProviderRegistry::unregister); |
| 117 | |
| 118 | server.shutdown(); |
| 119 | // Should we wait for shutdown? |
| 120 | log.info("Stopped"); |
| 121 | } |
| 122 | |
| 123 | @Modified |
| 124 | public void modified(ComponentContext context) { |
| 125 | // TODO support dynamic reconfiguration and restarting server? |
| 126 | } |
| 127 | |
| 128 | // RPC Server-side code |
| 129 | // RPC session Factory |
| 130 | /** |
| 131 | * Relays DeviceProviderRegistry calls from RPC client. |
| 132 | */ |
| 133 | class DeviceProviderRegistryServerProxy implements DeviceProviderRegistryRpc { |
| 134 | |
| 135 | @Override |
| 136 | public StreamObserver<DeviceProviderServiceMsg> register(StreamObserver<DeviceProviderMsg> toDeviceProvider) { |
| 137 | log.trace("DeviceProviderRegistryServerProxy#register called!"); |
| 138 | |
| 139 | DeviceProviderServerProxy provider = new DeviceProviderServerProxy(toDeviceProvider); |
| 140 | |
| 141 | return new DeviceProviderServiceServerProxy(provider, toDeviceProvider); |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | // Lower -> Upper Controller message |
| 146 | // RPC Server-side code |
| 147 | // RPC session handler |
| 148 | private final class DeviceProviderServiceServerProxy |
| 149 | implements StreamObserver<DeviceProviderServiceMsg> { |
| 150 | |
| 151 | // intentionally shadowing |
| 152 | private final Logger log = LoggerFactory.getLogger(getClass()); |
| 153 | |
| 154 | private final DeviceProviderServerProxy pairedProvider; |
| 155 | private final StreamObserver<DeviceProviderMsg> toDeviceProvider; |
| 156 | |
| 157 | private final Cache<Integer, CompletableFuture<Boolean>> outstandingIsReachable; |
| 158 | |
| 159 | // wrapped providerService |
| 160 | private DeviceProviderService deviceProviderService; |
| 161 | |
| 162 | |
| 163 | DeviceProviderServiceServerProxy(DeviceProviderServerProxy provider, |
| 164 | StreamObserver<DeviceProviderMsg> toDeviceProvider) { |
| 165 | this.pairedProvider = provider; |
| 166 | this.toDeviceProvider = toDeviceProvider; |
| 167 | outstandingIsReachable = CacheBuilder.newBuilder() |
| 168 | .expireAfterWrite(1, TimeUnit.MINUTES) |
| 169 | .build(); |
| 170 | |
| 171 | // pair RPC session in other direction |
| 172 | provider.pair(this); |
| 173 | } |
| 174 | |
| 175 | @Override |
| 176 | public void onNext(DeviceProviderServiceMsg msg) { |
| 177 | try { |
| 178 | log.trace("DeviceProviderServiceServerProxy received: {}", msg); |
| 179 | onMethod(msg); |
| 180 | } catch (Exception e) { |
| 181 | log.error("Exception thrown handling {}", msg, e); |
| 182 | onError(e); |
| 183 | throw e; |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | /** |
| 188 | * Translates received RPC message to {@link DeviceProviderService} method calls. |
| 189 | * @param msg DeviceProviderService message |
| 190 | */ |
| 191 | private void onMethod(DeviceProviderServiceMsg msg) { |
| 192 | switch (msg.getMethodCase()) { |
| 193 | case REGISTER_PROVIDER: |
| 194 | RegisterProvider registerProvider = msg.getRegisterProvider(); |
| 195 | // TODO Do we care about provider name? |
| 196 | pairedProvider.setProviderId(new ProviderId(registerProvider.getProviderScheme(), RPC_PROVIDER_NAME)); |
| 197 | registeredProviders.add(pairedProvider); |
| 198 | deviceProviderService = deviceProviderRegistry.register(pairedProvider); |
| 199 | break; |
| 200 | |
| 201 | case DEVICE_CONNECTED: |
| 202 | DeviceConnected deviceConnected = msg.getDeviceConnected(); |
| 203 | deviceProviderService.deviceConnected(deviceId(deviceConnected.getDeviceId()), |
| 204 | translate(deviceConnected.getDeviceDescription())); |
| 205 | break; |
| 206 | case DEVICE_DISCONNECTED: |
| 207 | DeviceDisconnected deviceDisconnected = msg.getDeviceDisconnected(); |
| 208 | deviceProviderService.deviceDisconnected(deviceId(deviceDisconnected.getDeviceId())); |
| 209 | break; |
| 210 | case UPDATE_PORTS: |
| 211 | UpdatePorts updatePorts = msg.getUpdatePorts(); |
| 212 | deviceProviderService.updatePorts(deviceId(updatePorts.getDeviceId()), |
| 213 | updatePorts.getPortDescriptionsList() |
| 214 | .stream() |
| 215 | .map(GrpcDeviceUtils::translate) |
| 216 | .collect(toList())); |
| 217 | break; |
| 218 | case PORT_STATUS_CHANGED: |
| 219 | PortStatusChanged portStatusChanged = msg.getPortStatusChanged(); |
| 220 | deviceProviderService.portStatusChanged(deviceId(portStatusChanged.getDeviceId()), |
| 221 | translate(portStatusChanged.getPortDescription())); |
| 222 | break; |
| 223 | case RECEIVED_ROLE_REPLY: |
| 224 | ReceivedRoleReply receivedRoleReply = msg.getReceivedRoleReply(); |
| 225 | deviceProviderService.receivedRoleReply(deviceId(receivedRoleReply.getDeviceId()), |
| 226 | translate(receivedRoleReply.getRequested()), |
| 227 | translate(receivedRoleReply.getResponse())); |
| 228 | break; |
| 229 | case UPDATE_PORT_STATISTICS: |
| 230 | UpdatePortStatistics updatePortStatistics = msg.getUpdatePortStatistics(); |
| 231 | deviceProviderService.updatePortStatistics(deviceId(updatePortStatistics.getDeviceId()), |
| 232 | updatePortStatistics.getPortStatisticsList() |
| 233 | .stream() |
| 234 | .map(GrpcDeviceUtils::translate) |
| 235 | .collect(toList())); |
| 236 | break; |
| 237 | |
| 238 | // return value of DeviceProvider#isReachable |
| 239 | case IS_REACHABLE_RESPONSE: |
| 240 | IsReachableResponse isReachableResponse = msg.getIsReachableResponse(); |
| 241 | int xid = isReachableResponse.getXid(); |
| 242 | boolean isReachable = isReachableResponse.getIsReachable(); |
| 243 | CompletableFuture<Boolean> result = outstandingIsReachable.asMap().remove(xid); |
| 244 | if (result != null) { |
| 245 | result.complete(isReachable); |
| 246 | } |
| 247 | break; |
| 248 | |
| 249 | case METHOD_NOT_SET: |
| 250 | default: |
| 251 | log.warn("Unexpected message received {}", msg); |
| 252 | break; |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | @Override |
| 257 | public void onCompleted() { |
| 258 | log.info("DeviceProviderServiceServerProxy completed"); |
| 259 | deviceProviderRegistry.unregister(pairedProvider); |
| 260 | registeredProviders.remove(pairedProvider); |
| 261 | toDeviceProvider.onCompleted(); |
| 262 | } |
| 263 | |
| 264 | @Override |
| 265 | public void onError(Throwable e) { |
| 266 | log.error("DeviceProviderServiceServerProxy#onError", e); |
| 267 | deviceProviderRegistry.unregister(pairedProvider); |
| 268 | registeredProviders.remove(pairedProvider); |
| 269 | // TODO What is the proper clean up for bi-di stream on error? |
| 270 | // sample suggests no-op |
| 271 | toDeviceProvider.onError(e); |
| 272 | } |
| 273 | |
| 274 | |
| 275 | /** |
| 276 | * Registers Future for {@link DeviceProvider#isReachable(DeviceId)} return value. |
| 277 | * @param xid IsReachable call ID. |
| 278 | * @param reply Future to |
| 279 | */ |
| 280 | void register(int xid, CompletableFuture<Boolean> reply) { |
| 281 | outstandingIsReachable.put(xid, reply); |
| 282 | } |
| 283 | |
| 284 | } |
| 285 | |
| 286 | // Upper -> Lower Controller message |
| 287 | /** |
| 288 | * Relay DeviceProvider calls to RPC client. |
| 289 | */ |
| 290 | private final class DeviceProviderServerProxy |
| 291 | implements DeviceProvider { |
| 292 | |
| 293 | private final Logger log = LoggerFactory.getLogger(getClass()); |
| 294 | |
| 295 | // xid for isReachable calls |
| 296 | private final AtomicInteger xidPool = new AtomicInteger(); |
| 297 | private final StreamObserver<DeviceProviderMsg> toDeviceProvider; |
| 298 | |
| 299 | private DeviceProviderServiceServerProxy deviceProviderServiceProxy = null; |
| 300 | private ProviderId providerId; |
| 301 | |
| 302 | DeviceProviderServerProxy(StreamObserver<DeviceProviderMsg> toDeviceProvider) { |
| 303 | this.toDeviceProvider = toDeviceProvider; |
| 304 | } |
| 305 | |
| 306 | void setProviderId(ProviderId pid) { |
| 307 | this.providerId = pid; |
| 308 | } |
| 309 | |
| 310 | /** |
| 311 | * Registers RPC stream in other direction. |
| 312 | * @param deviceProviderServiceProxy {@link DeviceProviderServiceServerProxy} |
| 313 | */ |
| 314 | void pair(DeviceProviderServiceServerProxy deviceProviderServiceProxy) { |
| 315 | this.deviceProviderServiceProxy = deviceProviderServiceProxy; |
| 316 | } |
| 317 | |
| 318 | @Override |
| 319 | public void triggerProbe(DeviceId deviceId) { |
| 320 | log.trace("triggerProbe({})", deviceId); |
| 321 | DeviceProviderMsg.Builder msgBuilder = DeviceProviderMsg.newBuilder(); |
| 322 | msgBuilder.setTriggerProbe(msgBuilder.getTriggerProbeBuilder() |
| 323 | .setDeviceId(deviceId.toString()) |
| 324 | .build()); |
| 325 | DeviceProviderMsg triggerProbeMsg = msgBuilder.build(); |
| 326 | toDeviceProvider.onNext(triggerProbeMsg); |
| 327 | // TODO Catch Exceptions and call onError() |
| 328 | } |
| 329 | |
| 330 | @Override |
| 331 | public void roleChanged(DeviceId deviceId, MastershipRole newRole) { |
| 332 | log.trace("roleChanged({}, {})", deviceId, newRole); |
| 333 | DeviceProviderMsg.Builder msgBuilder = DeviceProviderMsg.newBuilder(); |
| 334 | msgBuilder.setRoleChanged(msgBuilder.getRoleChangedBuilder() |
| 335 | .setDeviceId(deviceId.toString()) |
| 336 | .setNewRole(translate(newRole)) |
| 337 | .build()); |
| 338 | toDeviceProvider.onNext(msgBuilder.build()); |
| 339 | // TODO Catch Exceptions and call onError() |
| 340 | } |
| 341 | |
| 342 | @Override |
| 343 | public boolean isReachable(DeviceId deviceId) { |
| 344 | log.trace("isReachable({})", deviceId); |
| 345 | CompletableFuture<Boolean> result = new CompletableFuture<>(); |
| 346 | final int xid = xidPool.incrementAndGet(); |
| 347 | |
| 348 | DeviceProviderMsg.Builder msgBuilder = DeviceProviderMsg.newBuilder(); |
| 349 | msgBuilder.setIsReachableRequest(msgBuilder.getIsReachableRequestBuilder() |
| 350 | .setXid(xid) |
| 351 | .setDeviceId(deviceId.toString()) |
| 352 | .build()); |
| 353 | |
| 354 | // Associate xid and register above future some where |
| 355 | // in DeviceProviderService channel to receive reply |
| 356 | if (deviceProviderServiceProxy != null) { |
| 357 | deviceProviderServiceProxy.register(xid, result); |
| 358 | } |
| 359 | |
| 360 | // send message down RPC |
| 361 | toDeviceProvider.onNext(msgBuilder.build()); |
| 362 | |
| 363 | // wait for reply |
| 364 | try { |
| 365 | return result.get(10, TimeUnit.SECONDS); |
| 366 | } catch (InterruptedException e) { |
| 367 | log.debug("isReachable({}) was Interrupted", deviceId, e); |
| 368 | Thread.currentThread().interrupt(); |
| 369 | } catch (TimeoutException e) { |
| 370 | log.warn("isReachable({}) Timed out", deviceId, e); |
| 371 | } catch (ExecutionException e) { |
| 372 | log.error("isReachable({}) Execution failed", deviceId, e); |
| 373 | // close session? |
| 374 | } |
| 375 | return false; |
| 376 | // TODO Catch Exceptions and call onError() |
| 377 | } |
| 378 | |
| 379 | @Override |
| 380 | public ProviderId id() { |
| 381 | return checkNotNull(providerId, "not initialized yet"); |
| 382 | } |
| 383 | |
| 384 | } |
| 385 | } |