openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/core/connection/ConnectionAdapterImpl.java

   1 /*
   2  * Copyright (c) 2013 Pantheon Technologies s.r.o. and others. All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9
  10 package org.opendaylight.openflowjava.protocol.impl.core.connection;
  11
  12 import io.netty.channel.Channel;
  13 import io.netty.channel.ChannelFuture;
  14 import io.netty.util.concurrent.GenericFutureListener;
  15
  16 import java.net.InetSocketAddress;
  17 import java.util.concurrent.Future;
  18 import java.util.concurrent.RejectedExecutionException;
  19 import java.util.concurrent.TimeUnit;
  20
  21 import org.opendaylight.openflowjava.protocol.api.connection.ConnectionReadyListener;
  22 import org.opendaylight.openflowjava.statistics.CounterEventTypes;
  23 import org.opendaylight.openflowjava.statistics.StatisticsCounters;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.BarrierInput;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.BarrierOutput;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.EchoInput;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.EchoOutput;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.EchoReplyInput;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.EchoRequestMessage;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.ErrorMessage;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.ExperimenterInput;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.ExperimenterMessage;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.FlowModInput;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.FlowRemovedMessage;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetAsyncInput;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetAsyncOutput;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetConfigInput;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetConfigOutput;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetFeaturesInput;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetFeaturesOutput;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetQueueConfigInput;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetQueueConfigOutput;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GroupModInput;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.HelloInput;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.HelloMessage;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.MeterModInput;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.MultipartReplyMessage;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.MultipartRequestInput;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.OfHeader;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.OpenflowProtocolListener;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessage;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketOutInput;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PortModInput;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PortStatusMessage;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.RoleRequestInput;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.RoleRequestOutput;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.SetAsyncInput;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.SetConfigInput;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.TableModInput;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.system.rev130927.DisconnectEvent;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.system.rev130927.SwitchIdleEvent;
  62 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.system.rev130927.SystemNotificationsListener;
  63 import org.opendaylight.yangtools.yang.binding.DataObject;
  64 import org.opendaylight.yangtools.yang.binding.Notification;
  65 import org.opendaylight.yangtools.yang.common.RpcResult;
  66 import org.slf4j.Logger;
  67 import org.slf4j.LoggerFactory;
  68
  69 import com.google.common.base.Preconditions;
  70 import com.google.common.cache.Cache;
  71 import com.google.common.cache.CacheBuilder;
  72 import com.google.common.cache.RemovalCause;
  73 import com.google.common.cache.RemovalListener;
  74 import com.google.common.cache.RemovalNotification;
  75 import com.google.common.util.concurrent.ListenableFuture;
  76 import com.google.common.util.concurrent.SettableFuture;
  77
  78 /**
  79  * Handles messages (notifications + rpcs) and connections
  80  * @author mirehak
  81  * @author michal.polkorab
  82  */
  83 public class ConnectionAdapterImpl implements ConnectionFacade {
  84     /** after this time, RPC future response objects will be thrown away (in minutes) */
  85     public static final int RPC_RESPONSE_EXPIRATION = 1;
  86
  87     /**
  88      * Default depth of write queue, e.g. we allow these many messages
  89      * to be queued up before blocking producers.
  90      */
  91     public static final int DEFAULT_QUEUE_DEPTH = 1024;
  92
  93     private static final Logger LOG = LoggerFactory
  94             .getLogger(ConnectionAdapterImpl.class);
  95     private static final Exception QUEUE_FULL_EXCEPTION =
  96             new RejectedExecutionException("Output queue is full");
  97
  98     private static final RemovalListener<RpcResponseKey, ResponseExpectedRpcListener<?>> REMOVAL_LISTENER =
  99             new RemovalListener<RpcResponseKey, ResponseExpectedRpcListener<?>>() {
 100         @Override
 101         public void onRemoval(
 102                 final RemovalNotification<RpcResponseKey, ResponseExpectedRpcListener<?>> notification) {
 103             if (! notification.getCause().equals(RemovalCause.EXPLICIT)) {
 104                 notification.getValue().discard();
 105             }
 106         }
 107     };
 108
 109     /** expiring cache for future rpcResponses */
 110     private Cache<RpcResponseKey, ResponseExpectedRpcListener<?>> responseCache;
 111
 112     private final ChannelOutboundQueue output;
 113     private final Channel channel;
 114
 115     private ConnectionReadyListener connectionReadyListener;
 116     private OpenflowProtocolListener messageListener;
 117     private SystemNotificationsListener systemListener;
 118     private boolean disconnectOccured = false;
 119     private StatisticsCounters statisticsCounters;
 120
 121     /**
 122      * default ctor
 123      * @param channel the channel to be set - used for communication
 124      * @param address client address (used only in case of UDP communication,
 125      *  as there is no need to store address over tcp (stable channel))
 126      */
 127     public ConnectionAdapterImpl(final Channel channel, final InetSocketAddress address) {
 128         responseCache = CacheBuilder.newBuilder()
 129                 .concurrencyLevel(1)
 130                 .expireAfterWrite(RPC_RESPONSE_EXPIRATION, TimeUnit.MINUTES)
 131                 .removalListener(REMOVAL_LISTENER).build();
 132         this.channel = Preconditions.checkNotNull(channel);
 133         this.output = new ChannelOutboundQueue(channel, DEFAULT_QUEUE_DEPTH, address);
 134         channel.pipeline().addLast(output);
 135         statisticsCounters = StatisticsCounters.getInstance();
 136         LOG.debug("ConnectionAdapter created");
 137     }
 138
 139     @Override
 140     public Future<RpcResult<BarrierOutput>> barrier(final BarrierInput input) {
 141         return sendToSwitchExpectRpcResultFuture(
 142                 input, BarrierOutput.class, "barrier-input sending failed");
 143     }
 144
 145     @Override
 146     public Future<RpcResult<EchoOutput>> echo(final EchoInput input) {
 147         return sendToSwitchExpectRpcResultFuture(
 148                 input, EchoOutput.class, "echo-input sending failed");
 149     }
 150
 151     @Override
 152     public Future<RpcResult<Void>> echoReply(final EchoReplyInput input) {
 153         return sendToSwitchFuture(input, "echo-reply sending failed");
 154     }
 155
 156     @Override
 157     public Future<RpcResult<Void>> experimenter(final ExperimenterInput input) {
 158         return sendToSwitchFuture(input, "experimenter sending failed");
 159     }
 160
 161     @Override
 162     public Future<RpcResult<Void>> flowMod(final FlowModInput input) {
 163         statisticsCounters.incrementCounter(CounterEventTypes.DS_FLOW_MODS_ENTERED);
 164         return sendToSwitchFuture(input, "flow-mod sending failed");
 165     }
 166
 167     @Override
 168     public Future<RpcResult<GetConfigOutput>> getConfig(final GetConfigInput input) {
 169         return sendToSwitchExpectRpcResultFuture(
 170                 input, GetConfigOutput.class, "get-config-input sending failed");
 171     }
 172
 173     @Override
 174     public Future<RpcResult<GetFeaturesOutput>> getFeatures(
 175             final GetFeaturesInput input) {
 176         return sendToSwitchExpectRpcResultFuture(
 177                 input, GetFeaturesOutput.class, "get-features-input sending failed");
 178     }
 179
 180     @Override
 181     public Future<RpcResult<GetQueueConfigOutput>> getQueueConfig(
 182             final GetQueueConfigInput input) {
 183         return sendToSwitchExpectRpcResultFuture(
 184                 input, GetQueueConfigOutput.class, "get-queue-config-input sending failed");
 185     }
 186
 187     @Override
 188     public Future<RpcResult<Void>> groupMod(final GroupModInput input) {
 189         return sendToSwitchFuture(input, "group-mod-input sending failed");
 190     }
 191
 192     @Override
 193     public Future<RpcResult<Void>> hello(final HelloInput input) {
 194         return sendToSwitchFuture(input, "hello-input sending failed");
 195     }
 196
 197     @Override
 198     public Future<RpcResult<Void>> meterMod(final MeterModInput input) {
 199         return sendToSwitchFuture(input, "meter-mod-input sending failed");
 200     }
 201
 202     @Override
 203     public Future<RpcResult<Void>> packetOut(final PacketOutInput input) {
 204         return sendToSwitchFuture(input, "packet-out-input sending failed");
 205     }
 206
 207     @Override
 208     public Future<RpcResult<Void>> multipartRequest(final MultipartRequestInput input) {
 209         return sendToSwitchFuture(input, "multi-part-request sending failed");
 210     }
 211
 212     @Override
 213     public Future<RpcResult<Void>> portMod(final PortModInput input) {
 214         return sendToSwitchFuture(input, "port-mod-input sending failed");
 215     }
 216
 217     @Override
 218     public Future<RpcResult<RoleRequestOutput>> roleRequest(
 219             final RoleRequestInput input) {
 220         return sendToSwitchExpectRpcResultFuture(
 221                 input, RoleRequestOutput.class, "role-request-config-input sending failed");
 222     }
 223
 224     @Override
 225     public Future<RpcResult<Void>> setConfig(final SetConfigInput input) {
 226         return sendToSwitchFuture(input, "set-config-input sending failed");
 227     }
 228
 229     @Override
 230     public Future<RpcResult<Void>> tableMod(final TableModInput input) {
 231         return sendToSwitchFuture(input, "table-mod-input sending failed");
 232     }
 233
 234     @Override
 235     public Future<RpcResult<GetAsyncOutput>> getAsync(final GetAsyncInput input) {
 236         return sendToSwitchExpectRpcResultFuture(
 237                 input, GetAsyncOutput.class, "get-async-input sending failed");
 238     }
 239
 240     @Override
 241     public Future<RpcResult<Void>> setAsync(final SetAsyncInput input) {
 242         return sendToSwitchFuture(input, "set-async-input sending failed");
 243     }
 244
 245     @Override
 246     public Future<Boolean> disconnect() {
 247         ChannelFuture disconnectResult = channel.disconnect();
 248         responseCache.invalidateAll();
 249         disconnectOccured = true;
 250
 251         return handleTransportChannelFuture(disconnectResult);
 252     }
 253
 254     @Override
 255     public boolean isAlive() {
 256         return channel.isOpen();
 257     }
 258
 259     @Override
 260     public void setMessageListener(final OpenflowProtocolListener messageListener) {
 261         this.messageListener = messageListener;
 262     }
 263
 264     @Override
 265     public void consume(final DataObject message) {
 266         LOG.debug("ConsumeIntern msg");
 267         if (disconnectOccured ) {
 268             return;
 269         }
 270         if (message instanceof Notification) {
 271
 272             // System events
 273             if (message instanceof DisconnectEvent) {
 274                 systemListener.onDisconnectEvent((DisconnectEvent) message);
 275                 responseCache.invalidateAll();
 276                 disconnectOccured = true;
 277             } else if (message instanceof SwitchIdleEvent) {
 278                 systemListener.onSwitchIdleEvent((SwitchIdleEvent) message);
 279                 // OpenFlow messages
 280             } else if (message instanceof EchoRequestMessage) {
 281                 messageListener.onEchoRequestMessage((EchoRequestMessage) message);
 282                 statisticsCounters.incrementCounter(CounterEventTypes.US_MESSAGE_PASS);
 283             } else if (message instanceof ErrorMessage) {
 284                 messageListener.onErrorMessage((ErrorMessage) message);
 285                 statisticsCounters.incrementCounter(CounterEventTypes.US_MESSAGE_PASS);
 286             } else if (message instanceof ExperimenterMessage) {
 287                 messageListener.onExperimenterMessage((ExperimenterMessage) message);
 288                 statisticsCounters.incrementCounter(CounterEventTypes.US_MESSAGE_PASS);
 289             } else if (message instanceof FlowRemovedMessage) {
 290                 messageListener.onFlowRemovedMessage((FlowRemovedMessage) message);
 291                 statisticsCounters.incrementCounter(CounterEventTypes.US_MESSAGE_PASS);
 292             } else if (message instanceof HelloMessage) {
 293                 LOG.info("Hello received / branch");
 294                 messageListener.onHelloMessage((HelloMessage) message);
 295                 statisticsCounters.incrementCounter(CounterEventTypes.US_MESSAGE_PASS);
 296             } else if (message instanceof MultipartReplyMessage) {
 297                 messageListener.onMultipartReplyMessage((MultipartReplyMessage) message);
 298                 statisticsCounters.incrementCounter(CounterEventTypes.US_MESSAGE_PASS);
 299             } else if (message instanceof PacketInMessage) {
 300                 messageListener.onPacketInMessage((PacketInMessage) message);
 301                 statisticsCounters.incrementCounter(CounterEventTypes.US_MESSAGE_PASS);
 302             } else if (message instanceof PortStatusMessage) {
 303                 messageListener.onPortStatusMessage((PortStatusMessage) message);
 304                 statisticsCounters.incrementCounter(CounterEventTypes.US_MESSAGE_PASS);
 305             } else {
 306                 LOG.warn("message listening not supported for type: {}", message.getClass());
 307             }
 308         } else {
 309             if (message instanceof OfHeader) {
 310                 LOG.debug("OFheader msg received");
 311                 RpcResponseKey key = createRpcResponseKey((OfHeader) message);
 312                 final ResponseExpectedRpcListener<?> listener = findRpcResponse(key);
 313                 if (listener != null) {
 314                     LOG.debug("corresponding rpcFuture found");
 315                     listener.completed((OfHeader)message);
 316                     statisticsCounters.incrementCounter(CounterEventTypes.US_MESSAGE_PASS);
 317                     LOG.debug("after setting rpcFuture");
 318                     responseCache.invalidate(key);
 319                 } else {
 320                     LOG.warn("received unexpected rpc response: {}", key);
 321                 }
 322             } else {
 323                 LOG.warn("message listening not supported for type: {}", message.getClass());
 324             }
 325         }
 326     }
 327
 328     private <T> ListenableFuture<RpcResult<T>> enqueueMessage(final AbstractRpcListener<T> promise) {
 329         LOG.debug("Submitting promise {}", promise);
 330
 331         if (!output.enqueue(promise)) {
 332             LOG.debug("Message queue is full, rejecting execution");
 333             promise.failedRpc(QUEUE_FULL_EXCEPTION);
 334         } else {
 335             LOG.debug("Promise enqueued successfully");
 336         }
 337
 338         return promise.getResult();
 339     }
 340
 341     /**
 342      * sends given message to switch, sending result will be reported via return value
 343      * @param input message to send
 344      * @param failureInfo describes, what type of message caused failure by sending
 345      * @return future object, <ul>
 346      *  <li>if send successful, {@link RpcResult} without errors and successful
 347      *  status will be returned, </li>
 348      *  <li>else {@link RpcResult} will contain errors and failed status</li>
 349      *  </ul>
 350      */
 351     private ListenableFuture<RpcResult<Void>> sendToSwitchFuture(
 352             final DataObject input, final String failureInfo) {
 353         statisticsCounters.incrementCounter(CounterEventTypes.DS_ENTERED_OFJAVA);
 354         return enqueueMessage(new SimpleRpcListener(input, failureInfo));
 355     }
 356
 357     /**
 358      * sends given message to switch, sending result or switch response will be reported via return value
 359      * @param input message to send
 360      * @param responseClazz type of response
 361      * @param failureInfo describes, what type of message caused failure by sending
 362      * @return future object, <ul>
 363      *  <li>if send fails, {@link RpcResult} will contain errors and failed status </li>
 364      *  <li>else {@link RpcResult} will be stored in responseCache and wait for particular timeout
 365      *  ({@link ConnectionAdapterImpl#RPC_RESPONSE_EXPIRATION}),
 366      *  <ul><li>either switch will manage to answer
 367      *  and then corresponding response message will be set into returned future</li>
 368      *  <li>or response in cache will expire and returned future will be cancelled</li></ul>
 369      *  </li>
 370      *  </ul>
 371      */
 372     private <IN extends OfHeader, OUT extends OfHeader> ListenableFuture<RpcResult<OUT>> sendToSwitchExpectRpcResultFuture(
 373             final IN input, final Class<OUT> responseClazz, final String failureInfo) {
 374         final RpcResponseKey key = new RpcResponseKey(input.getXid(), responseClazz.getName());
 375         final ResponseExpectedRpcListener<OUT> listener =
 376                 new ResponseExpectedRpcListener<>(input, failureInfo, responseCache, key);
 377         statisticsCounters.incrementCounter(CounterEventTypes.DS_ENTERED_OFJAVA);
 378         return enqueueMessage(listener);
 379     }
 380
 381     /**
 382      * @param resultFuture
 383      * @param failureInfo
 384      * @param errorSeverity
 385      * @param message
 386      * @return
 387      */
 388     private static SettableFuture<Boolean> handleTransportChannelFuture(
 389             final ChannelFuture resultFuture) {
 390
 391         final SettableFuture<Boolean> transportResult = SettableFuture.create();
 392
 393         resultFuture.addListener(new GenericFutureListener<io.netty.util.concurrent.Future<? super Void>>() {
 394
 395             @Override
 396             public void operationComplete(
 397                     final io.netty.util.concurrent.Future<? super Void> future)
 398                     throws Exception {
 399                 transportResult.set(future.isSuccess());
 400                 if (!future.isSuccess()) {
 401                     transportResult.setException(future.cause());
 402                 }
 403             }
 404         });
 405         return transportResult;
 406     }
 407
 408     /**
 409      * @param message
 410      * @return
 411      */
 412     private static RpcResponseKey createRpcResponseKey(final OfHeader message) {
 413         return new RpcResponseKey(message.getXid(), message.getImplementedInterface().getName());
 414     }
 415
 416     /**
 417      * @return
 418      */
 419     private ResponseExpectedRpcListener<?> findRpcResponse(final RpcResponseKey key) {
 420         return responseCache.getIfPresent(key);
 421     }
 422
 423     @Override
 424     public void setSystemListener(final SystemNotificationsListener systemListener) {
 425         this.systemListener = systemListener;
 426     }
 427
 428     @Override
 429     public void checkListeners() {
 430         final StringBuilder buffer =  new StringBuilder();
 431         if (systemListener == null) {
 432             buffer.append("SystemListener ");
 433         }
 434         if (messageListener == null) {
 435             buffer.append("MessageListener ");
 436         }
 437         if (connectionReadyListener == null) {
 438             buffer.append("ConnectionReadyListener ");
 439         }
 440
 441         Preconditions.checkState(buffer.length() == 0, "Missing listeners: %s", buffer.toString());
 442     }
 443
 444     @Override
 445     public void fireConnectionReadyNotification() {
 446         new Thread(new Runnable() {
 447             @Override
 448             public void run() {
 449                 connectionReadyListener.onConnectionReady();
 450             }
 451         }).start();
 452     }
 453
 454     @Override
 455     public void setConnectionReadyListener(
 456             final ConnectionReadyListener connectionReadyListener) {
 457         this.connectionReadyListener = connectionReadyListener;
 458     }
 459
 460     @Override
 461     public InetSocketAddress getRemoteAddress() {
 462         return (InetSocketAddress) channel.remoteAddress();
 463     }
 464
 465     /**
 466      * Used only for testing purposes
 467      * @param cache
 468      */
 469     public void setResponseCache(Cache<RpcResponseKey, ResponseExpectedRpcListener<?>> cache) {
 470         this.responseCache = cache;
 471     }
 472 }