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

   1 /* Copyright (C)2013 Pantheon Technologies, s.r.o. All rights reserved. */
   2
   3 package org.opendaylight.openflowjava.protocol.impl.connection;
   4
   5 import io.netty.channel.Channel;
   6 import io.netty.channel.ChannelFuture;
   7 import io.netty.util.concurrent.GenericFutureListener;
   8
   9 import java.util.Collection;
  10 import java.util.Collections;
  11 import java.util.List;
  12 import java.util.concurrent.Future;
  13 import java.util.concurrent.TimeUnit;
  14
  15 import org.opendaylight.controller.sal.common.util.RpcErrors;
  16 import org.opendaylight.controller.sal.common.util.Rpcs;
  17 import org.opendaylight.openflowjava.protocol.api.connection.ConnectionReadyListener;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.BarrierInput;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.BarrierOutput;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.EchoInput;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.EchoOutput;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.EchoReplyInput;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.EchoRequestMessage;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.ErrorMessage;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.ExperimenterInput;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.ExperimenterMessage;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.FlowModInput;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.FlowRemovedMessage;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetAsyncInput;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetAsyncOutput;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetConfigInput;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetConfigOutput;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetFeaturesInput;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetFeaturesOutput;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetQueueConfigInput;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetQueueConfigOutput;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GroupModInput;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.HelloInput;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.HelloMessage;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.MeterModInput;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.MultipartReplyMessage;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.MultipartRequestInput;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.OfHeader;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.OpenflowProtocolListener;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessage;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketOutInput;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PortModInput;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PortStatusMessage;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.RoleRequestInput;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.RoleRequestOutput;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.SetAsyncInput;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.SetConfigInput;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.TableModInput;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.system.rev130927.DisconnectEvent;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.system.rev130927.SwitchIdleEvent;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.system.rev130927.SystemNotificationsListener;
  57 import org.opendaylight.yangtools.yang.binding.DataContainer;
  58 import org.opendaylight.yangtools.yang.binding.DataObject;
  59 import org.opendaylight.yangtools.yang.binding.Notification;
  60 import org.opendaylight.yangtools.yang.common.RpcError;
  61 import org.opendaylight.yangtools.yang.common.RpcError.ErrorSeverity;
  62 import org.opendaylight.yangtools.yang.common.RpcError.ErrorType;
  63 import org.opendaylight.yangtools.yang.common.RpcResult;
  64 import org.slf4j.Logger;
  65 import org.slf4j.LoggerFactory;
  66
  67 import com.google.common.cache.Cache;
  68 import com.google.common.cache.CacheBuilder;
  69 import com.google.common.cache.RemovalListener;
  70 import com.google.common.cache.RemovalNotification;
  71 import com.google.common.collect.Lists;
  72 import com.google.common.util.concurrent.SettableFuture;
  73
  74 /**
  75  * Handles messages (notifications + rpcs) and connections
  76  * @author mirehak
  77  * @author michal.polkorab
  78  */
  79 public class ConnectionAdapterImpl implements ConnectionFacade {
  80
  81     /** after this time, rpc future response objects will be thrown away (in minutes) */
  82     public static final int RPC_RESPONSE_EXPIRATION = 1;
  83
  84     protected static final Logger LOG = LoggerFactory
  85             .getLogger(ConnectionAdapterImpl.class);
  86
  87     private static final String APPLICATION_TAG = "OPENFLOW_LIBRARY";
  88     private static final String TAG = "OPENFLOW";
  89     private Channel channel;
  90     private OpenflowProtocolListener messageListener;
  91     /** expiring cache for future rpcResponses */
  92     protected Cache<RpcResponseKey, SettableFuture<?>> responseCache;
  93     private SystemNotificationsListener systemListener;
  94     private boolean disconnectOccured = false;
  95
  96     protected ConnectionReadyListener connectionReadyListener;
  97
  98     /**
  99      * default ctor
 100      */
 101     public ConnectionAdapterImpl() {
 102         responseCache = CacheBuilder.newBuilder()
 103                 .concurrencyLevel(1)
 104                 .expireAfterWrite(RPC_RESPONSE_EXPIRATION, TimeUnit.MINUTES)
 105                 .removalListener(new ResponseRemovalListener()).build();
 106         LOG.debug("ConnectionAdapter created");
 107     }
 108
 109     /**
 110      * @param channel the channel to be set - used for communication
 111      */
 112     public void setChannel(Channel channel) {
 113         this.channel = channel;
 114     }
 115
 116     @Override
 117     public Future<RpcResult<BarrierOutput>> barrier(BarrierInput input) {
 118         return sendToSwitchExpectRpcResultFuture(
 119                 input, BarrierOutput.class, "barrier-input sending failed");
 120     }
 121
 122     @Override
 123     public Future<RpcResult<EchoOutput>> echo(EchoInput input) {
 124         return sendToSwitchExpectRpcResultFuture(
 125                 input, EchoOutput.class, "echo-input sending failed");
 126     }
 127
 128     @Override
 129     public Future<RpcResult<Void>> echoReply(EchoReplyInput input) {
 130         return sendToSwitchFuture(input, "echo-reply sending failed");
 131     }
 132
 133     @Override
 134     public Future<RpcResult<Void>> experimenter(ExperimenterInput input) {
 135         return sendToSwitchFuture(input, "experimenter sending failed");
 136     }
 137
 138     @Override
 139     public Future<RpcResult<Void>> flowMod(FlowModInput input) {
 140         return sendToSwitchFuture(input, "flow-mod sending failed");
 141     }
 142
 143     @Override
 144     public Future<RpcResult<GetConfigOutput>> getConfig(GetConfigInput input) {
 145         return sendToSwitchExpectRpcResultFuture(
 146                 input, GetConfigOutput.class, "get-config-input sending failed");
 147     }
 148
 149     @Override
 150     public Future<RpcResult<GetFeaturesOutput>> getFeatures(
 151             GetFeaturesInput input) {
 152         return sendToSwitchExpectRpcResultFuture(
 153                 input, GetFeaturesOutput.class, "get-features-input sending failed");
 154     }
 155
 156     @Override
 157     public Future<RpcResult<GetQueueConfigOutput>> getQueueConfig(
 158             GetQueueConfigInput input) {
 159         return sendToSwitchExpectRpcResultFuture(
 160                 input, GetQueueConfigOutput.class, "get-queue-config-input sending failed");
 161     }
 162
 163     @Override
 164     public Future<RpcResult<Void>> groupMod(GroupModInput input) {
 165         return sendToSwitchFuture(input, "group-mod-input sending failed");
 166     }
 167
 168     @Override
 169     public Future<RpcResult<Void>> hello(HelloInput input) {
 170         return sendToSwitchFuture(input, "hello-input sending failed");
 171     }
 172
 173     @Override
 174     public Future<RpcResult<Void>> meterMod(MeterModInput input) {
 175         return sendToSwitchFuture(input, "meter-mod-input sending failed");
 176     }
 177
 178     @Override
 179     public Future<RpcResult<Void>> packetOut(PacketOutInput input) {
 180         return sendToSwitchFuture(input, "packet-out-input sending failed");
 181     }
 182
 183     @Override
 184     public Future<RpcResult<Void>> multipartRequest(MultipartRequestInput input) {
 185         return sendToSwitchFuture(input, "multi-part-request sending failed");
 186     }
 187
 188     @Override
 189     public Future<RpcResult<Void>> portMod(PortModInput input) {
 190         return sendToSwitchFuture(input, "port-mod-input sending failed");
 191     }
 192
 193     @Override
 194     public Future<RpcResult<RoleRequestOutput>> roleRequest(
 195             RoleRequestInput input) {
 196         return sendToSwitchExpectRpcResultFuture(
 197                 input, RoleRequestOutput.class, "role-request-config-input sending failed");
 198     }
 199
 200     @Override
 201     public Future<RpcResult<Void>> setConfig(SetConfigInput input) {
 202         return sendToSwitchFuture(input, "set-config-input sending failed");
 203     }
 204
 205     @Override
 206     public Future<RpcResult<Void>> tableMod(TableModInput input) {
 207         return sendToSwitchFuture(input, "table-mod-input sending failed");
 208     }
 209
 210     @Override
 211     public Future<RpcResult<GetAsyncOutput>> getAsync(GetAsyncInput input) {
 212         return sendToSwitchExpectRpcResultFuture(
 213                 input, GetAsyncOutput.class, "get-async-input sending failed");
 214     }
 215
 216     @Override
 217     public Future<RpcResult<Void>> setAsync(SetAsyncInput input) {
 218         return sendToSwitchFuture(input, "set-async-input sending failed");
 219     }
 220
 221     @Override
 222     public Future<Boolean> disconnect() {
 223         ChannelFuture disconnectResult = channel.disconnect();
 224         responseCache.invalidateAll();
 225         disconnectOccured = true;
 226
 227         String failureInfo = "switch disconnecting failed";
 228         ErrorSeverity errorSeverity = ErrorSeverity.ERROR;
 229         String message = "Check the switch connection";
 230         return handleTransportChannelFuture(disconnectResult, failureInfo, errorSeverity, message);
 231     }
 232
 233     @Override
 234     public boolean isAlive() {
 235         return channel.isOpen();
 236     }
 237
 238     @Override
 239     public void setMessageListener(OpenflowProtocolListener messageListener) {
 240         this.messageListener = messageListener;
 241     }
 242
 243     @Override
 244     public void consume(DataObject message) {
 245         LOG.debug("ConsumeIntern msg");
 246         if (disconnectOccured ) {
 247             return;
 248         }
 249         if (message instanceof Notification) {
 250             // System events
 251             if (message instanceof DisconnectEvent) {
 252                 systemListener.onDisconnectEvent((DisconnectEvent) message);
 253                 responseCache.invalidateAll();
 254                 disconnectOccured = true;
 255             } else if (message instanceof SwitchIdleEvent) {
 256                 systemListener.onSwitchIdleEvent((SwitchIdleEvent) message);
 257             }
 258             // OpenFlow messages
 259               else if (message instanceof EchoRequestMessage) {
 260                 messageListener.onEchoRequestMessage((EchoRequestMessage) message);
 261             } else if (message instanceof ErrorMessage) {
 262                 messageListener.onErrorMessage((ErrorMessage) message);
 263             } else if (message instanceof ExperimenterMessage) {
 264                 messageListener.onExperimenterMessage((ExperimenterMessage) message);
 265             } else if (message instanceof FlowRemovedMessage) {
 266                 messageListener.onFlowRemovedMessage((FlowRemovedMessage) message);
 267             } else if (message instanceof HelloMessage) {
 268                 LOG.info("Hello received / branch");
 269                 messageListener.onHelloMessage((HelloMessage) message);
 270             } else if (message instanceof MultipartReplyMessage) {
 271                 messageListener.onMultipartReplyMessage((MultipartReplyMessage) message);
 272             } else if (message instanceof PacketInMessage) {
 273                 messageListener.onPacketInMessage((PacketInMessage) message);
 274             } else if (message instanceof PortStatusMessage) {
 275                 messageListener.onPortStatusMessage((PortStatusMessage) message);
 276             } else {
 277                 LOG.warn("message listening not supported for type: "+message.getClass());
 278             }
 279         } else {
 280             if (message instanceof OfHeader) {
 281                 LOG.debug("OFheader msg received");
 282                 RpcResponseKey key = createRpcResponseKey((OfHeader) message);
 283                 final SettableFuture<RpcResult<?>> rpcFuture = findRpcResponse(key);
 284                 if (rpcFuture != null) {
 285                     LOG.debug("corresponding rpcFuture found");
 286                     List<RpcError> errors = Collections.emptyList();
 287                     LOG.debug("before setting rpcFuture");
 288                     rpcFuture.set(Rpcs.getRpcResult(true, message, errors));
 289                     LOG.debug("after setting rpcFuture");
 290                     responseCache.invalidate(key);
 291                 } else {
 292                     LOG.warn("received unexpected rpc response: "+key);
 293                 }
 294             } else {
 295                 LOG.warn("message listening not supported for type: "+message.getClass());
 296             }
 297         }
 298     }
 299
 300     /**
 301      * sends given message to switch, sending result will be reported via return value
 302      * @param input message to send
 303      * @param failureInfo describes, what type of message caused failure by sending
 304      * @return future object, <ul>
 305      *  <li>if send successful, {@link RpcResult} without errors and successful
 306      *  status will be returned, </li>
 307      *  <li>else {@link RpcResult} will contain errors and failed status</li>
 308      *  </ul>
 309      */
 310     private SettableFuture<RpcResult<Void>> sendToSwitchFuture(
 311             DataObject input, final String failureInfo) {
 312         LOG.debug("going to flush");
 313         ChannelFuture resultFuture = channel.writeAndFlush(input);
 314         LOG.debug("flushed");
 315
 316         ErrorSeverity errorSeverity = ErrorSeverity.ERROR;
 317         String errorMessage = "check switch connection";
 318         return handleRpcChannelFuture(resultFuture, failureInfo, errorSeverity, errorMessage);
 319     }
 320
 321     /**
 322      * sends given message to switch, sending result or switch response will be reported via return value
 323      * @param input message to send
 324      * @param responseClazz type of response
 325      * @param failureInfo describes, what type of message caused failure by sending
 326      * @return future object, <ul>
 327      *  <li>if send fails, {@link RpcResult} will contain errors and failed status </li>
 328      *  <li>else {@link RpcResult} will be stored in responseCache and wait for particular timeout
 329      *  ({@link ConnectionAdapterImpl#RPC_RESPONSE_EXPIRATION}),
 330      *  <ul><li>either switch will manage to answer
 331      *  and then corresponding response message will be set into returned future</li>
 332      *  <li>or response in cache will expire and returned future will be cancelled</li></ul>
 333      *  </li>
 334      *  </ul>
 335      */
 336     private <IN extends OfHeader, OUT extends OfHeader> SettableFuture<RpcResult<OUT>> sendToSwitchExpectRpcResultFuture(
 337             IN input, Class<OUT> responseClazz, final String failureInfo) {
 338         LOG.debug("going to flush");
 339         SettableFuture<RpcResult<OUT>> rpcResult = SettableFuture.create();
 340         RpcResponseKey key = new RpcResponseKey(input.getXid(), responseClazz.getName());
 341         responseCache.put(key, rpcResult);
 342         ChannelFuture resultFuture = channel.writeAndFlush(input);
 343         LOG.debug("flushed");
 344
 345         ErrorSeverity errorSeverity = ErrorSeverity.ERROR;
 346         String errorMessage = "check switch connection";
 347
 348         return handleRpcChannelFutureWithResponse(resultFuture, failureInfo, errorSeverity,
 349                 errorMessage, input, responseClazz, rpcResult, key);
 350     }
 351
 352     /**
 353      * @param resultFuture
 354      * @param failureInfo
 355      * @return
 356      */
 357     private SettableFuture<RpcResult<Void>> handleRpcChannelFuture(
 358             ChannelFuture resultFuture, final String failureInfo,
 359             final ErrorSeverity errorSeverity, final String errorMessage) {
 360
 361         final SettableFuture<RpcResult<Void>> rpcResult = SettableFuture.create();
 362         LOG.debug("handlerpcchannelfuture");
 363         resultFuture.addListener(new GenericFutureListener<io.netty.util.concurrent.Future<? super Void>>() {
 364
 365             @Override
 366             public void operationComplete(
 367                     io.netty.util.concurrent.Future<? super Void> future)
 368                     throws Exception {
 369                 LOG.debug("operation complete");
 370                 Collection<RpcError> errors = Collections.emptyList();
 371
 372                 if (future.cause() != null) {
 373                     LOG.debug("future.cause != null");
 374                     RpcError rpcError = buildRpcError(failureInfo,
 375                             errorSeverity, errorMessage, future.cause());
 376                     errors = Lists.newArrayList(rpcError);
 377                 }
 378
 379                 rpcResult.set(Rpcs.getRpcResult(
 380                         future.isSuccess(),
 381                         (Void) null,
 382                         errors)
 383                 );
 384             }
 385         });
 386         return rpcResult;
 387     }
 388
 389     /**
 390      * @param resultFuture
 391      * @param failureInfo
 392      * @param errorSeverity
 393      * @param errorMessage
 394      * @param input
 395      * @param responseClazz
 396      * @param key of rpcResponse
 397      * @return
 398      */
 399     private <IN extends OfHeader, OUT extends OfHeader> SettableFuture<RpcResult<OUT>> handleRpcChannelFutureWithResponse(
 400             ChannelFuture resultFuture, final String failureInfo,
 401             final ErrorSeverity errorSeverity, final String errorMessage,
 402             final IN input, Class<OUT> responseClazz, final SettableFuture<RpcResult<OUT>> rpcResult, final RpcResponseKey key) {
 403         LOG.debug("handleRpcchanfuture with response");
 404
 405         resultFuture.addListener(new GenericFutureListener<io.netty.util.concurrent.Future<? super Void>>() {
 406
 407             @Override
 408             public void operationComplete(
 409                     io.netty.util.concurrent.Future<? super Void> future)
 410                     throws Exception {
 411
 412                 LOG.debug("operation complete");
 413                 Collection<RpcError> errors = Collections.emptyList();
 414                 if (future.cause() != null) {
 415                     LOG.debug("ChannelFuture.cause != null");
 416                     RpcError rpcError = buildRpcError(failureInfo,
 417                             errorSeverity, errorMessage, future.cause());
 418                     errors = Lists.newArrayList(rpcError);
 419                     rpcResult.set(Rpcs.getRpcResult(
 420                             future.isSuccess(),
 421                             (OUT) null,
 422                             errors)
 423                             );
 424                     responseCache.invalidate(key);
 425                 } else {
 426                     LOG.debug("ChannelFuture.cause == null");
 427                     if (responseCache.getIfPresent(key) == null) {
 428                         LOG.debug("responcache: key wasn't present");
 429                     }
 430                 }
 431             }
 432         });
 433         return rpcResult;
 434     }
 435
 436     /**
 437      * @param resultFuture
 438      * @param failureInfo
 439      * @param errorSeverity
 440      * @param message
 441      * @return
 442      */
 443     private static SettableFuture<Boolean> handleTransportChannelFuture(
 444             ChannelFuture resultFuture, final String failureInfo,
 445             final ErrorSeverity errorSeverity, final String message) {
 446
 447         final SettableFuture<Boolean> transportResult = SettableFuture.create();
 448
 449         resultFuture.addListener(new GenericFutureListener<io.netty.util.concurrent.Future<? super Void>>() {
 450
 451             @Override
 452             public void operationComplete(
 453                     io.netty.util.concurrent.Future<? super Void> future)
 454                     throws Exception {
 455                 transportResult.set(future.isSuccess());
 456                 if (!future.isSuccess()) {
 457                     transportResult.setException(future.cause());
 458                 }
 459             }
 460         });
 461         return transportResult;
 462     }
 463
 464     /**
 465      * @param cause
 466      * @return
 467      */
 468     protected RpcError buildRpcError(String info, ErrorSeverity severity, String message,
 469             Throwable cause) {
 470         RpcError error = RpcErrors.getRpcError(APPLICATION_TAG, TAG, info, severity, message,
 471                 ErrorType.RPC, cause);
 472         return error;
 473     }
 474
 475     /**
 476      * @param cause
 477      * @return
 478      */
 479     protected RpcError buildTransportError(String info, ErrorSeverity severity, String message,
 480             Throwable cause) {
 481         RpcError error = RpcErrors.getRpcError(APPLICATION_TAG, TAG, info, severity, message,
 482                 ErrorType.TRANSPORT, cause);
 483         return error;
 484     }
 485
 486     /**
 487      * @param message
 488      * @return
 489      */
 490     private static RpcResponseKey createRpcResponseKey(OfHeader message) {
 491         return new RpcResponseKey(message.getXid(), message.getImplementedInterface().getName());
 492     }
 493
 494     /**
 495      * @return
 496      */
 497     @SuppressWarnings("unchecked")
 498     private SettableFuture<RpcResult<?>> findRpcResponse(RpcResponseKey key) {
 499         return (SettableFuture<RpcResult<?>>) responseCache.getIfPresent(key);
 500     }
 501
 502     @Override
 503     public void setSystemListener(SystemNotificationsListener systemListener) {
 504         this.systemListener = systemListener;
 505     }
 506
 507     @Override
 508     public void checkListeners() {
 509         StringBuffer buffer =  new StringBuffer();
 510         if (systemListener == null) {
 511             buffer.append("SystemListener ");
 512         }
 513         if (messageListener == null) {
 514             buffer.append("MessageListener ");
 515         }
 516         if (connectionReadyListener == null) {
 517             buffer.append("ConnectionReadyListener ");
 518         }
 519
 520         if (buffer.length() > 0) {
 521             throw new IllegalStateException("Missing listeners: " + buffer.toString());
 522         }
 523     }
 524
 525     static class ResponseRemovalListener implements RemovalListener<RpcResponseKey, SettableFuture<?>> {
 526         @Override
 527         public void onRemoval(
 528                 RemovalNotification<RpcResponseKey, SettableFuture<?>> notification) {
 529             SettableFuture<?> future = notification.getValue();
 530             if (!future.isDone()) {
 531                 LOG.warn("rpc response discarded: " + notification.getKey());
 532                 future.cancel(true);
 533             }
 534         }
 535     }
 536
 537     /**
 538      * Class is used ONLY for exiting msgQueue processing thread
 539      * @author michal.polkorab
 540      */
 541     static class ExitingDataObject implements DataObject {
 542         @Override
 543         public Class<? extends DataContainer> getImplementedInterface() {
 544             return null;
 545         }
 546     }
 547
 548     @Override
 549     public void fireConnectionReadyNotification() {
 550         new Thread(new Runnable() {
 551             @Override
 552             public void run() {
 553                 connectionReadyListener.onConnectionReady();
 554             }
 555         }).start();
 556     }
 557
 558
 559     @Override
 560     public void setConnectionReadyListener(
 561             ConnectionReadyListener connectionReadyListener) {
 562         this.connectionReadyListener = connectionReadyListener;
 563     }
 564
 565 }