dom/mdsal-dom-broker/src/main/java/org/opendaylight/mdsal/dom/broker/DOMRpcRouter.java

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc. 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 package org.opendaylight.mdsal.dom.broker;
   9
  10 import static com.google.common.base.Preconditions.checkArgument;
  11 import static com.google.common.base.Verify.verifyNotNull;
  12 import static java.util.Objects.requireNonNull;
  13
  14 import com.google.common.annotations.VisibleForTesting;
  15 import com.google.common.collect.ClassToInstanceMap;
  16 import com.google.common.collect.Collections2;
  17 import com.google.common.collect.ImmutableClassToInstanceMap;
  18 import com.google.common.collect.ImmutableList;
  19 import com.google.common.collect.ImmutableMap;
  20 import com.google.common.collect.ImmutableSet;
  21 import com.google.common.collect.MapDifference;
  22 import com.google.common.collect.MapDifference.ValueDifference;
  23 import com.google.common.collect.Maps;
  24 import com.google.common.collect.Sets;
  25 import com.google.common.util.concurrent.Futures;
  26 import com.google.common.util.concurrent.ListenableFuture;
  27 import com.google.common.util.concurrent.ThreadFactoryBuilder;
  28 import java.util.ArrayList;
  29 import java.util.Collection;
  30 import java.util.HashSet;
  31 import java.util.List;
  32 import java.util.Map;
  33 import java.util.Map.Entry;
  34 import java.util.Optional;
  35 import java.util.Set;
  36 import java.util.concurrent.ExecutorService;
  37 import java.util.concurrent.Executors;
  38 import java.util.concurrent.ThreadFactory;
  39 import javax.annotation.PreDestroy;
  40 import javax.inject.Inject;
  41 import javax.inject.Singleton;
  42 import org.checkerframework.checker.lock.qual.GuardedBy;
  43 import org.eclipse.jdt.annotation.NonNull;
  44 import org.eclipse.jdt.annotation.NonNullByDefault;
  45 import org.opendaylight.mdsal.dom.api.DOMActionAvailabilityExtension;
  46 import org.opendaylight.mdsal.dom.api.DOMActionAvailabilityExtension.AvailabilityListener;
  47 import org.opendaylight.mdsal.dom.api.DOMActionImplementation;
  48 import org.opendaylight.mdsal.dom.api.DOMActionInstance;
  49 import org.opendaylight.mdsal.dom.api.DOMActionNotAvailableException;
  50 import org.opendaylight.mdsal.dom.api.DOMActionProviderService;
  51 import org.opendaylight.mdsal.dom.api.DOMActionResult;
  52 import org.opendaylight.mdsal.dom.api.DOMActionService;
  53 import org.opendaylight.mdsal.dom.api.DOMActionServiceExtension;
  54 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  55 import org.opendaylight.mdsal.dom.api.DOMRpcAvailabilityListener;
  56 import org.opendaylight.mdsal.dom.api.DOMRpcIdentifier;
  57 import org.opendaylight.mdsal.dom.api.DOMRpcImplementation;
  58 import org.opendaylight.mdsal.dom.api.DOMRpcImplementationNotAvailableException;
  59 import org.opendaylight.mdsal.dom.api.DOMRpcImplementationRegistration;
  60 import org.opendaylight.mdsal.dom.api.DOMRpcProviderService;
  61 import org.opendaylight.mdsal.dom.api.DOMRpcResult;
  62 import org.opendaylight.mdsal.dom.api.DOMRpcService;
  63 import org.opendaylight.mdsal.dom.api.DOMSchemaService;
  64 import org.opendaylight.mdsal.dom.spi.AbstractDOMRpcImplementationRegistration;
  65 import org.opendaylight.yangtools.concepts.AbstractListenerRegistration;
  66 import org.opendaylight.yangtools.concepts.AbstractObjectRegistration;
  67 import org.opendaylight.yangtools.concepts.AbstractRegistration;
  68 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  69 import org.opendaylight.yangtools.concepts.ObjectRegistration;
  70 import org.opendaylight.yangtools.yang.common.QName;
  71 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  72 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  73 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  74 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodes;
  75 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  76 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContextListener;
  77 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Absolute;
  78 import org.osgi.service.component.annotations.Activate;
  79 import org.osgi.service.component.annotations.Component;
  80 import org.osgi.service.component.annotations.Deactivate;
  81 import org.osgi.service.component.annotations.Reference;
  82 import org.osgi.service.component.annotations.RequireServiceComponentRuntime;
  83 import org.slf4j.Logger;
  84 import org.slf4j.LoggerFactory;
  85
  86 @Singleton
  87 @Component(immediate = true, service = DOMRpcRouterServices.class)
  88 @RequireServiceComponentRuntime
  89 public final class DOMRpcRouter extends AbstractRegistration
  90         implements DOMRpcRouterServices, EffectiveModelContextListener {
  91     private static final Logger LOG = LoggerFactory.getLogger(DOMRpcRouter.class);
  92     private static final ThreadFactory THREAD_FACTORY = new ThreadFactoryBuilder().setNameFormat(
  93             "DOMRpcRouter-listener-%s").setDaemon(true).build();
  94
  95     private final ExecutorService listenerNotifier = Executors.newSingleThreadExecutor(THREAD_FACTORY);
  96     private final @NonNull DOMActionProviderService actionProviderService = new ActionProviderServiceFacade();
  97     private final @NonNull DOMActionService actionService = new ActionServiceFacade();
  98     private final @NonNull DOMRpcProviderService rpcProviderService = new RpcProviderServiceFacade();
  99     private final @NonNull DOMRpcService rpcService = new RpcServiceFacade();
 100
 101     @GuardedBy("this")
 102     private ImmutableList<Registration<?>> listeners = ImmutableList.of();
 103
 104     @GuardedBy("this")
 105     private ImmutableList<ActionRegistration<?>> actionListeners = ImmutableList.of();
 106
 107     private volatile DOMRpcRoutingTable routingTable = DOMRpcRoutingTable.EMPTY;
 108
 109     private volatile DOMActionRoutingTable actionRoutingTable = DOMActionRoutingTable.EMPTY;
 110
 111     private ListenerRegistration<?> listenerRegistration;
 112
 113     @Deprecated
 114     @VisibleForTesting
 115     // FIXME: 9.0.0: make this constructor package-private
 116     public DOMRpcRouter() {
 117
 118     }
 119
 120     @Inject
 121     @Activate
 122     public DOMRpcRouter(@Reference final DOMSchemaService schemaService) {
 123         listenerRegistration = schemaService.registerSchemaContextListener(this);
 124         LOG.info("DOM RPC/Action router started");
 125     }
 126
 127     @Deprecated(forRemoval = true)
 128     public static DOMRpcRouter newInstance(final DOMSchemaService schemaService) {
 129         return new DOMRpcRouter(schemaService);
 130     }
 131
 132     @PreDestroy
 133     @Deactivate
 134     public void shutdown() {
 135         close();
 136     }
 137
 138     @Override
 139     public DOMActionService getActionService() {
 140         return actionService;
 141     }
 142
 143     @Override
 144     public DOMActionProviderService getActionProviderService() {
 145         return actionProviderService;
 146     }
 147
 148     @Override
 149     public DOMRpcService getRpcService() {
 150         return rpcService;
 151     }
 152
 153     @Override
 154     public DOMRpcProviderService getRpcProviderService() {
 155         return rpcProviderService;
 156     }
 157
 158     private synchronized void removeRpcImplementation(final DOMRpcImplementation implementation,
 159             final Set<DOMRpcIdentifier> rpcs) {
 160         final DOMRpcRoutingTable oldTable = routingTable;
 161         final DOMRpcRoutingTable newTable = (DOMRpcRoutingTable) oldTable.remove(implementation, rpcs);
 162         routingTable = newTable;
 163
 164         listenerNotifier.execute(() -> notifyRemoved(newTable, implementation));
 165     }
 166
 167     private synchronized void removeRpcImplementations(final Map<DOMRpcIdentifier, DOMRpcImplementation> map) {
 168         final DOMRpcRoutingTable oldTable = routingTable;
 169         final DOMRpcRoutingTable newTable = (DOMRpcRoutingTable) oldTable.removeAll(map);
 170         routingTable = newTable;
 171
 172         listenerNotifier.execute(() -> notifyRemoved(newTable, map.values()));
 173     }
 174
 175     private synchronized void removeActionImplementation(final DOMActionImplementation implementation,
 176             final Set<DOMActionInstance> actions) {
 177         final DOMActionRoutingTable oldTable = actionRoutingTable;
 178         final DOMActionRoutingTable newTable = (DOMActionRoutingTable) oldTable.remove(implementation, actions);
 179         actionRoutingTable = newTable;
 180
 181         listenerNotifier.execute(() -> notifyActionChanged(newTable, implementation));
 182     }
 183
 184     private synchronized void removeListener(final ListenerRegistration<? extends DOMRpcAvailabilityListener> reg) {
 185         listeners = ImmutableList.copyOf(Collections2.filter(listeners, input -> !reg.equals(input)));
 186     }
 187
 188     private synchronized void removeActionListener(final ListenerRegistration<? extends AvailabilityListener> reg) {
 189         actionListeners = ImmutableList.copyOf(Collections2.filter(actionListeners, input -> !reg.equals(input)));
 190     }
 191
 192     private synchronized void notifyAdded(final DOMRpcRoutingTable newTable, final DOMRpcImplementation impl) {
 193         for (Registration<?> l : listeners) {
 194             l.addRpc(newTable, impl);
 195         }
 196     }
 197
 198     private synchronized void notifyAdded(final DOMRpcRoutingTable newTable,
 199             final Collection<? extends DOMRpcImplementation> impls) {
 200         for (Registration<?> l : listeners) {
 201             for (DOMRpcImplementation impl : impls) {
 202                 l.addRpc(newTable, impl);
 203             }
 204         }
 205     }
 206
 207     private synchronized void notifyRemoved(final DOMRpcRoutingTable newTable, final DOMRpcImplementation impl) {
 208         for (Registration<?> l : listeners) {
 209             l.removeRpc(newTable, impl);
 210         }
 211     }
 212
 213     private synchronized void notifyRemoved(final DOMRpcRoutingTable newTable,
 214             final Collection<? extends DOMRpcImplementation> impls) {
 215         for (Registration<?> l : listeners) {
 216             for (DOMRpcImplementation impl : impls) {
 217                 l.removeRpc(newTable, impl);
 218             }
 219         }
 220     }
 221
 222     private synchronized void notifyActionChanged(final DOMActionRoutingTable newTable,
 223             final DOMActionImplementation impl) {
 224         for (ActionRegistration<?> l : actionListeners) {
 225             l.actionChanged(newTable, impl);
 226         }
 227     }
 228
 229     @Override
 230     public synchronized void onModelContextUpdated(final EffectiveModelContext newModelContext) {
 231         final DOMRpcRoutingTable oldTable = routingTable;
 232         final DOMRpcRoutingTable newTable = (DOMRpcRoutingTable) oldTable.setSchemaContext(newModelContext);
 233         routingTable = newTable;
 234
 235         final DOMActionRoutingTable oldActionTable = actionRoutingTable;
 236         final DOMActionRoutingTable newActionTable =
 237                 (DOMActionRoutingTable) oldActionTable.setSchemaContext(newModelContext);
 238         actionRoutingTable = newActionTable;
 239     }
 240
 241     @Override
 242     protected void removeRegistration() {
 243         if (listenerRegistration != null) {
 244             listenerRegistration.close();
 245             listenerRegistration = null;
 246         }
 247         listenerNotifier.shutdown();
 248         LOG.info("DOM RPC/Action router stopped");
 249     }
 250
 251     @VisibleForTesting
 252     synchronized List<?> listeners() {
 253         return listeners;
 254     }
 255
 256     @VisibleForTesting
 257     synchronized List<?> actionListeners() {
 258         return actionListeners;
 259     }
 260
 261     @VisibleForTesting
 262     DOMRpcRoutingTable routingTable() {
 263         return routingTable;
 264     }
 265
 266     private static final class Registration<T extends DOMRpcAvailabilityListener>
 267         extends AbstractListenerRegistration<T> {
 268
 269         private Map<QName, Set<YangInstanceIdentifier>> prevRpcs;
 270         private DOMRpcRouter router;
 271
 272         Registration(final DOMRpcRouter router, final T listener, final Map<QName, Set<YangInstanceIdentifier>> rpcs) {
 273             super(listener);
 274             this.router = requireNonNull(router);
 275             this.prevRpcs = requireNonNull(rpcs);
 276         }
 277
 278         @Override
 279         protected void removeRegistration() {
 280             router.removeListener(this);
 281             router = null;
 282         }
 283
 284         void initialTable() {
 285             final List<DOMRpcIdentifier> added = new ArrayList<>();
 286             for (Entry<QName, Set<YangInstanceIdentifier>> e : prevRpcs.entrySet()) {
 287                 added.addAll(Collections2.transform(e.getValue(), i -> DOMRpcIdentifier.create(e.getKey(), i)));
 288             }
 289             if (!added.isEmpty()) {
 290                 getInstance().onRpcAvailable(added);
 291             }
 292         }
 293
 294         void addRpc(final DOMRpcRoutingTable newTable, final DOMRpcImplementation impl) {
 295             final T l = getInstance();
 296             if (!l.acceptsImplementation(impl)) {
 297                 return;
 298             }
 299
 300             final Map<QName, Set<YangInstanceIdentifier>> rpcs = verifyNotNull(newTable.getOperations(l));
 301             final MapDifference<QName, Set<YangInstanceIdentifier>> diff = Maps.difference(prevRpcs, rpcs);
 302
 303             final List<DOMRpcIdentifier> added = new ArrayList<>();
 304             for (Entry<QName, Set<YangInstanceIdentifier>> e : diff.entriesOnlyOnRight().entrySet()) {
 305                 added.addAll(Collections2.transform(e.getValue(), i -> DOMRpcIdentifier.create(e.getKey(), i)));
 306             }
 307             for (Entry<QName, ValueDifference<Set<YangInstanceIdentifier>>> e : diff.entriesDiffering().entrySet()) {
 308                 for (YangInstanceIdentifier i : Sets.difference(e.getValue().rightValue(), e.getValue().leftValue())) {
 309                     added.add(DOMRpcIdentifier.create(e.getKey(), i));
 310                 }
 311             }
 312
 313             prevRpcs = rpcs;
 314             if (!added.isEmpty()) {
 315                 l.onRpcAvailable(added);
 316             }
 317         }
 318
 319         void removeRpc(final DOMRpcRoutingTable newTable, final DOMRpcImplementation impl) {
 320             final T l = getInstance();
 321             if (!l.acceptsImplementation(impl)) {
 322                 return;
 323             }
 324
 325             final Map<QName, Set<YangInstanceIdentifier>> rpcs = verifyNotNull(newTable.getOperations(l));
 326             final MapDifference<QName, Set<YangInstanceIdentifier>> diff = Maps.difference(prevRpcs, rpcs);
 327
 328             final List<DOMRpcIdentifier> removed = new ArrayList<>();
 329             for (Entry<QName, Set<YangInstanceIdentifier>> e : diff.entriesOnlyOnLeft().entrySet()) {
 330                 removed.addAll(Collections2.transform(e.getValue(), i -> DOMRpcIdentifier.create(e.getKey(), i)));
 331             }
 332             for (Entry<QName, ValueDifference<Set<YangInstanceIdentifier>>> e : diff.entriesDiffering().entrySet()) {
 333                 for (YangInstanceIdentifier i : Sets.difference(e.getValue().leftValue(), e.getValue().rightValue())) {
 334                     removed.add(DOMRpcIdentifier.create(e.getKey(), i));
 335                 }
 336             }
 337
 338             prevRpcs = rpcs;
 339             if (!removed.isEmpty()) {
 340                 l.onRpcUnavailable(removed);
 341             }
 342         }
 343     }
 344
 345     private static final class ActionRegistration<T extends AvailabilityListener>
 346         extends AbstractListenerRegistration<T> {
 347
 348         private Map<Absolute, Set<DOMDataTreeIdentifier>> prevActions;
 349         private DOMRpcRouter router;
 350
 351         ActionRegistration(final DOMRpcRouter router, final T listener,
 352                 final Map<Absolute, Set<DOMDataTreeIdentifier>> actions) {
 353             super(listener);
 354             this.router = requireNonNull(router);
 355             this.prevActions = requireNonNull(actions);
 356         }
 357
 358         @Override
 359         protected void removeRegistration() {
 360             router.removeActionListener(this);
 361             router = null;
 362         }
 363
 364         void initialTable() {
 365             final List<DOMActionInstance> added = new ArrayList<>();
 366             for (Entry<Absolute, Set<DOMDataTreeIdentifier>> e : prevActions.entrySet()) {
 367                 added.addAll(Collections2.transform(e.getValue(), i -> DOMActionInstance.of(e.getKey(), i)));
 368             }
 369             if (!added.isEmpty()) {
 370                 getInstance().onActionsChanged(ImmutableSet.of(), ImmutableSet.copyOf(added));
 371             }
 372         }
 373
 374         void actionChanged(final DOMActionRoutingTable newTable, final DOMActionImplementation impl) {
 375             final T l = getInstance();
 376             if (!l.acceptsImplementation(impl)) {
 377                 return;
 378             }
 379
 380             final Map<Absolute, Set<DOMDataTreeIdentifier>> actions = verifyNotNull(newTable.getOperations(l));
 381             final MapDifference<Absolute, Set<DOMDataTreeIdentifier>> diff = Maps.difference(prevActions, actions);
 382
 383             final Set<DOMActionInstance> removed = new HashSet<>();
 384             final Set<DOMActionInstance> added = new HashSet<>();
 385
 386             for (Entry<Absolute, Set<DOMDataTreeIdentifier>> e : diff.entriesOnlyOnLeft().entrySet()) {
 387                 removed.addAll(Collections2.transform(e.getValue(), i -> DOMActionInstance.of(e.getKey(), i)));
 388             }
 389
 390             for (Entry<Absolute, Set<DOMDataTreeIdentifier>> e : diff.entriesOnlyOnRight().entrySet()) {
 391                 added.addAll(Collections2.transform(e.getValue(), i -> DOMActionInstance.of(e.getKey(), i)));
 392             }
 393
 394             for (Entry<Absolute, ValueDifference<Set<DOMDataTreeIdentifier>>> e : diff.entriesDiffering().entrySet()) {
 395                 for (DOMDataTreeIdentifier i : Sets.difference(e.getValue().leftValue(), e.getValue().rightValue())) {
 396                     removed.add(DOMActionInstance.of(e.getKey(), i));
 397                 }
 398
 399                 for (DOMDataTreeIdentifier i : Sets.difference(e.getValue().rightValue(), e.getValue().leftValue())) {
 400                     added.add(DOMActionInstance.of(e.getKey(), i));
 401                 }
 402             }
 403
 404             prevActions = actions;
 405             if (!removed.isEmpty() || !added.isEmpty()) {
 406                 l.onActionsChanged(removed, added);
 407             }
 408         }
 409     }
 410
 411     @NonNullByDefault
 412     private final class ActionAvailabilityFacade implements DOMActionAvailabilityExtension {
 413         @Override
 414         public <T extends AvailabilityListener> ListenerRegistration<T> registerAvailabilityListener(final T listener) {
 415             synchronized (DOMRpcRouter.this) {
 416                 final ActionRegistration<T> ret = new ActionRegistration<>(DOMRpcRouter.this, listener,
 417                     actionRoutingTable.getOperations(listener));
 418                 actionListeners = ImmutableList.<ActionRegistration<?>>builder()
 419                     .addAll(actionListeners)
 420                     .add(ret)
 421                     .build();
 422
 423                 listenerNotifier.execute(ret::initialTable);
 424                 return ret;
 425             }
 426         }
 427     }
 428
 429     @NonNullByDefault
 430     private final class ActionServiceFacade implements DOMActionService {
 431         private final ClassToInstanceMap<DOMActionServiceExtension> extensions = ImmutableClassToInstanceMap.of(
 432             DOMActionAvailabilityExtension.class, new ActionAvailabilityFacade());
 433
 434         @Override
 435         public ClassToInstanceMap<DOMActionServiceExtension> getExtensions() {
 436             return extensions;
 437         }
 438
 439         @Override
 440         public ListenableFuture<? extends DOMActionResult> invokeAction(final Absolute type,
 441                 final DOMDataTreeIdentifier path, final ContainerNode input) {
 442             final YangInstanceIdentifier pathRoot = path.getRootIdentifier();
 443             checkArgument(!pathRoot.isEmpty(), "Action path must not be empty");
 444
 445             final DOMActionRoutingTableEntry entry = (DOMActionRoutingTableEntry) actionRoutingTable.getEntry(type);
 446             return entry != null ? OperationInvocation.invoke(entry, type, path, requireNonNull(input))
 447                 : Futures.immediateFailedFuture(
 448                     new DOMActionNotAvailableException("No implementation of Action %s available", type));
 449         }
 450     }
 451
 452     @NonNullByDefault
 453     private final class ActionProviderServiceFacade implements DOMActionProviderService {
 454         @Override
 455         public <T extends DOMActionImplementation> ObjectRegistration<T> registerActionImplementation(
 456                 final T implementation, final Set<DOMActionInstance> instances) {
 457
 458             synchronized (DOMRpcRouter.this) {
 459                 final DOMActionRoutingTable oldTable = actionRoutingTable;
 460                 final DOMActionRoutingTable newTable = (DOMActionRoutingTable) oldTable.add(implementation, instances);
 461                 actionRoutingTable = newTable;
 462
 463                 listenerNotifier.execute(() -> notifyActionChanged(newTable, implementation));
 464             }
 465
 466             return new AbstractObjectRegistration<>(implementation) {
 467                 @Override
 468                 protected void removeRegistration() {
 469                     removeActionImplementation(getInstance(), instances);
 470                 }
 471             };
 472         }
 473     }
 474
 475     private final class RpcServiceFacade implements DOMRpcService {
 476         @Override
 477         public ListenableFuture<? extends DOMRpcResult> invokeRpc(final QName type, final NormalizedNode input) {
 478             final AbstractDOMRpcRoutingTableEntry entry = (AbstractDOMRpcRoutingTableEntry) routingTable.getEntry(type);
 479             if (entry == null) {
 480                 return Futures.immediateFailedFuture(
 481                     new DOMRpcImplementationNotAvailableException("No implementation of RPC %s available", type));
 482             }
 483
 484             return OperationInvocation.invoke(entry, requireNonNull(input));
 485         }
 486
 487         @Override
 488         public <T extends DOMRpcAvailabilityListener> ListenerRegistration<T> registerRpcListener(final T listener) {
 489             synchronized (DOMRpcRouter.this) {
 490                 final Registration<T> ret = new Registration<>(DOMRpcRouter.this, listener,
 491                     routingTable.getOperations(listener));
 492                 listeners = ImmutableList.<Registration<?>>builder().addAll(listeners).add(ret).build();
 493
 494                 listenerNotifier.execute(ret::initialTable);
 495                 return ret;
 496             }
 497         }
 498     }
 499
 500     private final class RpcProviderServiceFacade implements DOMRpcProviderService {
 501         @Override
 502         public <T extends DOMRpcImplementation> DOMRpcImplementationRegistration<T> registerRpcImplementation(
 503                 final T implementation, final DOMRpcIdentifier... rpcs) {
 504             return registerRpcImplementation(implementation, ImmutableSet.copyOf(rpcs));
 505         }
 506
 507         @Override
 508         public <T extends DOMRpcImplementation> DOMRpcImplementationRegistration<T> registerRpcImplementation(
 509                 final T implementation, final Set<DOMRpcIdentifier> rpcs) {
 510
 511             synchronized (DOMRpcRouter.this) {
 512                 final DOMRpcRoutingTable oldTable = routingTable;
 513                 final DOMRpcRoutingTable newTable = (DOMRpcRoutingTable) oldTable.add(implementation, rpcs);
 514                 routingTable = newTable;
 515
 516                 listenerNotifier.execute(() -> notifyAdded(newTable, implementation));
 517             }
 518
 519             return new AbstractDOMRpcImplementationRegistration<>(implementation) {
 520                 @Override
 521                 protected void removeRegistration() {
 522                     removeRpcImplementation(getInstance(), rpcs);
 523                 }
 524             };
 525         }
 526
 527         @Override
 528         public org.opendaylight.yangtools.concepts.Registration registerRpcImplementations(
 529                 final Map<DOMRpcIdentifier, DOMRpcImplementation> map) {
 530             final ImmutableMap<DOMRpcIdentifier, DOMRpcImplementation> defensive = ImmutableMap.copyOf(map);
 531             checkArgument(!map.isEmpty());
 532
 533             synchronized (DOMRpcRouter.this) {
 534                 final DOMRpcRoutingTable oldTable = routingTable;
 535                 final DOMRpcRoutingTable newTable = (DOMRpcRoutingTable) oldTable.addAll(defensive);
 536                 routingTable = newTable;
 537
 538                 listenerNotifier.execute(() -> notifyAdded(newTable, defensive.values()));
 539             }
 540
 541             return new AbstractRegistration() {
 542                 @Override
 543                 protected void removeRegistration() {
 544                     removeRpcImplementations(defensive);
 545                 }
 546             };
 547         }
 548     }
 549
 550     static final class OperationInvocation {
 551         private static final Logger LOG = LoggerFactory.getLogger(OperationInvocation.class);
 552
 553         static ListenableFuture<? extends DOMActionResult> invoke(final DOMActionRoutingTableEntry entry,
 554                 final Absolute type, final DOMDataTreeIdentifier path, final ContainerNode input) {
 555             List<DOMActionImplementation> impls = entry.getImplementations(path);
 556             if (impls == null) {
 557                 impls = entry.getImplementations(
 558                     new DOMDataTreeIdentifier(path.getDatastoreType(), YangInstanceIdentifier.empty()));
 559                 if (impls == null) {
 560                     return Futures.immediateFailedFuture(new DOMActionNotAvailableException(
 561                         "No implementation of Action %s available for %s", type, path));
 562                 }
 563             }
 564
 565             return impls.get(0).invokeAction(type, path, input);
 566         }
 567
 568         static ListenableFuture<? extends DOMRpcResult> invoke(final AbstractDOMRpcRoutingTableEntry entry,
 569                 final NormalizedNode input) {
 570             if (entry instanceof UnknownDOMRpcRoutingTableEntry) {
 571                 return Futures.immediateFailedFuture(
 572                     new DOMRpcImplementationNotAvailableException("%s is not resolved to an RPC", entry.getType()));
 573             } else if (entry instanceof RoutedDOMRpcRoutingTableEntry) {
 574                 return invokeRoutedRpc((RoutedDOMRpcRoutingTableEntry) entry, input);
 575             } else if (entry instanceof GlobalDOMRpcRoutingTableEntry) {
 576                 return invokeGlobalRpc((GlobalDOMRpcRoutingTableEntry) entry, input);
 577             }
 578
 579             return Futures.immediateFailedFuture(
 580                 new DOMRpcImplementationNotAvailableException("Unsupported RPC entry."));
 581         }
 582
 583         private static ListenableFuture<? extends DOMRpcResult> invokeRoutedRpc(
 584                 final RoutedDOMRpcRoutingTableEntry entry, final NormalizedNode input) {
 585             final Optional<NormalizedNode> maybeKey = NormalizedNodes.findNode(input,
 586                 entry.getRpcId().getContextReference());
 587
 588             // Routing key is present, attempt to deliver as a routed RPC
 589             if (maybeKey.isPresent()) {
 590                 final NormalizedNode key = maybeKey.get();
 591                 final Object value = key.body();
 592                 if (value instanceof YangInstanceIdentifier) {
 593                     final YangInstanceIdentifier iid = (YangInstanceIdentifier) value;
 594
 595                     // Find a DOMRpcImplementation for a specific iid
 596                     final List<DOMRpcImplementation> specificImpls = entry.getImplementations(iid);
 597                     if (specificImpls != null) {
 598                         return specificImpls.get(0)
 599                             .invokeRpc(DOMRpcIdentifier.create(entry.getType(), iid), input);
 600                     }
 601
 602                     LOG.debug("No implementation for context {} found will now look for wildcard id", iid);
 603
 604                     // Find a DOMRpcImplementation for a wild card. Usually remote-rpc-connector would register an
 605                     // implementation this way
 606                     final List<DOMRpcImplementation> mayBeRemoteImpls =
 607                         entry.getImplementations(YangInstanceIdentifier.empty());
 608
 609                     if (mayBeRemoteImpls != null) {
 610                         return mayBeRemoteImpls.get(0)
 611                             .invokeRpc(DOMRpcIdentifier.create(entry.getType(), iid), input);
 612                     }
 613
 614                 } else {
 615                     LOG.warn("Ignoring wrong context value {}", value);
 616                 }
 617             }
 618
 619             final List<DOMRpcImplementation> impls = entry.getImplementations(null);
 620             if (impls != null) {
 621                 return impls.get(0).invokeRpc(entry.getRpcId(), input);
 622             }
 623
 624             return Futures.immediateFailedFuture(
 625                 new DOMRpcImplementationNotAvailableException("No implementation of RPC %s available",
 626                     entry.getType()));
 627         }
 628
 629         private static ListenableFuture<? extends DOMRpcResult> invokeGlobalRpc(
 630                 final GlobalDOMRpcRoutingTableEntry entry, final NormalizedNode input) {
 631             return entry.getImplementations(YangInstanceIdentifier.empty()).get(0).invokeRpc(entry.getRpcId(), input);
 632         }
 633     }
 634 }