opendaylight/md-sal/sal-distributed-datastore/src/test/java/org/opendaylight/controller/cluster/datastore/AbstractShardTest.java

   1 /*
   2  * Copyright (c) 2015 Brocade Communications 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.controller.cluster.datastore;
   9
  10 import static org.junit.Assert.assertEquals;
  11 import static org.junit.Assert.assertNotNull;
  12 import static org.junit.Assert.assertTrue;
  13 import static org.junit.Assert.fail;
  14 import static org.mockito.Matchers.any;
  15 import static org.mockito.Mockito.doAnswer;
  16 import static org.mockito.Mockito.doReturn;
  17 import static org.mockito.Mockito.mock;
  18 import static org.opendaylight.controller.cluster.datastore.DataStoreVersions.CURRENT_VERSION;
  19 import static org.opendaylight.controller.cluster.datastore.ShardDataTreeMocking.immediateCanCommit;
  20 import static org.opendaylight.controller.cluster.datastore.ShardDataTreeMocking.immediateCommit;
  21 import static org.opendaylight.controller.cluster.datastore.ShardDataTreeMocking.immediatePreCommit;
  22 import static org.opendaylight.controller.cluster.datastore.ShardDataTreeMocking.successfulCanCommit;
  23 import static org.opendaylight.controller.cluster.datastore.ShardDataTreeMocking.successfulCommit;
  24 import static org.opendaylight.controller.cluster.datastore.ShardDataTreeMocking.successfulPreCommit;
  25 import akka.actor.ActorRef;
  26 import akka.actor.PoisonPill;
  27 import akka.actor.Props;
  28 import akka.dispatch.Dispatchers;
  29 import akka.japi.Creator;
  30 import akka.pattern.Patterns;
  31 import akka.testkit.TestActorRef;
  32 import akka.util.Timeout;
  33 import com.google.common.base.Optional;
  34 import com.google.common.primitives.UnsignedLong;
  35 import com.google.common.util.concurrent.FutureCallback;
  36 import com.google.common.util.concurrent.ListenableFuture;
  37 import com.google.common.util.concurrent.Uninterruptibles;
  38 import java.io.IOException;
  39 import java.util.Collections;
  40 import java.util.HashMap;
  41 import java.util.Map;
  42 import java.util.Set;
  43 import java.util.concurrent.CountDownLatch;
  44 import java.util.concurrent.ExecutionException;
  45 import java.util.concurrent.TimeUnit;
  46 import java.util.concurrent.TimeoutException;
  47 import java.util.concurrent.atomic.AtomicInteger;
  48 import org.junit.After;
  49 import org.junit.Assert;
  50 import org.junit.Before;
  51 import org.opendaylight.controller.cluster.access.concepts.MemberName;
  52 import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
  53 import org.opendaylight.controller.cluster.datastore.DatastoreContext.Builder;
  54 import org.opendaylight.controller.cluster.datastore.identifiers.ShardIdentifier;
  55 import org.opendaylight.controller.cluster.datastore.messages.BatchedModifications;
  56 import org.opendaylight.controller.cluster.datastore.messages.ForwardedReadyTransaction;
  57 import org.opendaylight.controller.cluster.datastore.modification.MutableCompositeModification;
  58 import org.opendaylight.controller.cluster.datastore.modification.WriteModification;
  59 import org.opendaylight.controller.cluster.datastore.persisted.CommitTransactionPayload;
  60 import org.opendaylight.controller.cluster.datastore.persisted.PreBoronShardDataTreeSnapshot;
  61 import org.opendaylight.controller.cluster.raft.ReplicatedLogEntry;
  62 import org.opendaylight.controller.cluster.raft.Snapshot;
  63 import org.opendaylight.controller.cluster.raft.TestActorFactory;
  64 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  65 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  66 import org.opendaylight.controller.md.cluster.datastore.model.CarsModel;
  67 import org.opendaylight.controller.md.cluster.datastore.model.TestModel;
  68 import org.opendaylight.yangtools.concepts.Identifier;
  69 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  70 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  71 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
  72 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  73 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  74 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
  75 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
  76 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
  77 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateTip;
  78 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
  79 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataValidationFailedException;
  80 import org.opendaylight.yangtools.yang.data.api.schema.tree.ModificationType;
  81 import org.opendaylight.yangtools.yang.data.api.schema.tree.TipProducingDataTree;
  82 import org.opendaylight.yangtools.yang.data.api.schema.tree.TreeType;
  83 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
  84 import org.opendaylight.yangtools.yang.data.impl.schema.tree.InMemoryDataTreeFactory;
  85 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  86 import scala.concurrent.Await;
  87 import scala.concurrent.Future;
  88 import scala.concurrent.duration.Duration;
  89
  90 /**
  91  * Abstract base for shard unit tests.
  92  *
  93  * @author Thomas Pantelis
  94  */
  95 public abstract class AbstractShardTest extends AbstractActorTest{
  96     protected static final SchemaContext SCHEMA_CONTEXT = TestModel.createTestContext();
  97
  98     private static final AtomicInteger NEXT_SHARD_NUM = new AtomicInteger();
  99
 100     protected final ShardIdentifier shardID = ShardIdentifier.create("inventory", MemberName.forName("member-1"),
 101         "config" + NEXT_SHARD_NUM.getAndIncrement());
 102
 103     protected final Builder dataStoreContextBuilder = DatastoreContext.newBuilder().
 104             shardJournalRecoveryLogBatchSize(3).shardSnapshotBatchCount(5000).
 105             shardHeartbeatIntervalInMillis(100);
 106
 107     protected final TestActorFactory actorFactory = new TestActorFactory(getSystem());
 108
 109     @Before
 110     public void setUp() {
 111         InMemorySnapshotStore.clear();
 112         InMemoryJournal.clear();
 113     }
 114
 115     @After
 116     public void tearDown() {
 117         InMemorySnapshotStore.clear();
 118         InMemoryJournal.clear();
 119         actorFactory.close();
 120     }
 121
 122     protected DatastoreContext newDatastoreContext() {
 123         return dataStoreContextBuilder.build();
 124     }
 125
 126     protected Props newShardProps() {
 127         return newShardBuilder().props();
 128     }
 129
 130     protected Shard.Builder newShardBuilder() {
 131         return Shard.builder().id(shardID).datastoreContext(newDatastoreContext()).schemaContext(SCHEMA_CONTEXT);
 132     }
 133
 134     protected void testRecovery(final Set<Integer> listEntryKeys) throws Exception {
 135         // Create the actor and wait for recovery complete.
 136
 137         final int nListEntries = listEntryKeys.size();
 138
 139         final CountDownLatch recoveryComplete = new CountDownLatch(1);
 140
 141         @SuppressWarnings("serial")
 142         final Creator<Shard> creator = new Creator<Shard>() {
 143             @Override
 144             public Shard create() throws Exception {
 145                 return new Shard(newShardBuilder()) {
 146                     @Override
 147                     protected void onRecoveryComplete() {
 148                         try {
 149                             super.onRecoveryComplete();
 150                         } finally {
 151                             recoveryComplete.countDown();
 152                         }
 153                     }
 154                 };
 155             }
 156         };
 157
 158         final TestActorRef<Shard> shard = TestActorRef.create(getSystem(),
 159                 Props.create(new DelegatingShardCreator(creator)).withDispatcher(Dispatchers.DefaultDispatcherId()), "testRecovery");
 160
 161         assertEquals("Recovery complete", true, recoveryComplete.await(5, TimeUnit.SECONDS));
 162
 163         // Verify data in the data store.
 164
 165         final NormalizedNode<?, ?> outerList = readStore(shard, TestModel.OUTER_LIST_PATH);
 166         assertNotNull(TestModel.OUTER_LIST_QNAME.getLocalName() + " not found", outerList);
 167         assertTrue(TestModel.OUTER_LIST_QNAME.getLocalName() + " value is not Iterable",
 168                 outerList.getValue() instanceof Iterable);
 169         for(final Object entry: (Iterable<?>) outerList.getValue()) {
 170             assertTrue(TestModel.OUTER_LIST_QNAME.getLocalName() + " entry is not MapEntryNode",
 171                     entry instanceof MapEntryNode);
 172             final MapEntryNode mapEntry = (MapEntryNode)entry;
 173             final Optional<DataContainerChild<? extends PathArgument, ?>> idLeaf =
 174                     mapEntry.getChild(new YangInstanceIdentifier.NodeIdentifier(TestModel.ID_QNAME));
 175             assertTrue("Missing leaf " + TestModel.ID_QNAME.getLocalName(), idLeaf.isPresent());
 176             final Object value = idLeaf.get().getValue();
 177             assertTrue("Unexpected value for leaf "+ TestModel.ID_QNAME.getLocalName() + ": " + value,
 178                     listEntryKeys.remove(value));
 179         }
 180
 181         if(!listEntryKeys.isEmpty()) {
 182             fail("Missing " + TestModel.OUTER_LIST_QNAME.getLocalName() + " entries with keys: " +
 183                     listEntryKeys);
 184         }
 185
 186         assertEquals("Last log index", nListEntries,
 187                 shard.underlyingActor().getShardMBean().getLastLogIndex());
 188         assertEquals("Commit index", nListEntries,
 189                 shard.underlyingActor().getShardMBean().getCommitIndex());
 190         assertEquals("Last applied", nListEntries,
 191                 shard.underlyingActor().getShardMBean().getLastApplied());
 192
 193         shard.tell(PoisonPill.getInstance(), ActorRef.noSender());
 194     }
 195
 196     protected void verifyLastApplied(final TestActorRef<Shard> shard, final long expectedValue) {
 197         long lastApplied = -1;
 198         for(int i = 0; i < 20 * 5; i++) {
 199             lastApplied = shard.underlyingActor().getShardMBean().getLastApplied();
 200             if(lastApplied == expectedValue) {
 201                 return;
 202             }
 203             Uninterruptibles.sleepUninterruptibly(50, TimeUnit.MILLISECONDS);
 204         }
 205
 206         Assert.fail(String.format("Expected last applied: %d, Actual: %d", expectedValue, lastApplied));
 207     }
 208
 209     protected TipProducingDataTree createDelegatingMockDataTree() throws Exception {
 210         TipProducingDataTree actual = InMemoryDataTreeFactory.getInstance().create(TreeType.CONFIGURATION);
 211         final TipProducingDataTree mock = mock(TipProducingDataTree.class);
 212
 213         doAnswer(invocation -> {
 214             actual.validate(invocation.getArgumentAt(0, DataTreeModification.class));
 215             return null;
 216         }).when(mock).validate(any(DataTreeModification.class));
 217
 218         doAnswer(invocation -> {
 219             return actual.prepare(invocation.getArgumentAt(0, DataTreeModification.class));
 220         }).when(mock).prepare(any(DataTreeModification.class));
 221
 222         doAnswer(invocation -> {
 223             actual.commit(invocation.getArgumentAt(0, DataTreeCandidate.class));
 224             return null;
 225         }).when(mock).commit(any(DataTreeCandidate.class));
 226
 227         doAnswer(invocation -> {
 228             actual.setSchemaContext(invocation.getArgumentAt(0, SchemaContext.class));
 229             return null;
 230         }).when(mock).setSchemaContext(any(SchemaContext.class));
 231
 232         doAnswer(invocation -> {
 233             return actual.takeSnapshot();
 234         }).when(mock).takeSnapshot();
 235
 236         doAnswer(invocation -> {
 237             return actual.getRootPath();
 238         }).when(mock).getRootPath();
 239
 240         return mock;
 241     }
 242
 243     protected ShardDataTreeCohort mockShardDataTreeCohort() {
 244         ShardDataTreeCohort cohort = mock(ShardDataTreeCohort.class);
 245         DataTreeCandidate candidate = mockCandidate("candidate");
 246         successfulCanCommit(cohort);
 247         successfulPreCommit(cohort, candidate);
 248         successfulCommit(cohort);
 249         doReturn(candidate).when(cohort).getCandidate();
 250         return cohort;
 251     }
 252
 253     protected Map<TransactionIdentifier, CapturingShardDataTreeCohort> setupCohortDecorator(final Shard shard,
 254             final TransactionIdentifier... transactionIDs) {
 255         final Map<TransactionIdentifier, CapturingShardDataTreeCohort> cohortMap = new HashMap<>();
 256         for(TransactionIdentifier id: transactionIDs) {
 257             cohortMap.put(id, new CapturingShardDataTreeCohort());
 258         }
 259
 260         shard.getCommitCoordinator().setCohortDecorator(new ShardCommitCoordinator.CohortDecorator() {
 261             @Override
 262             public ShardDataTreeCohort decorate(final Identifier transactionID, final ShardDataTreeCohort actual) {
 263                 CapturingShardDataTreeCohort cohort = cohortMap.get(transactionID);
 264                 cohort.setDelegate(actual);
 265                 return cohort;
 266             }
 267         });
 268
 269         return cohortMap;
 270     }
 271
 272     protected BatchedModifications prepareBatchedModifications(final TransactionIdentifier transactionID,
 273                                                                final MutableCompositeModification modification) {
 274         return prepareBatchedModifications(transactionID, modification, false);
 275     }
 276
 277     protected static BatchedModifications prepareBatchedModifications(final TransactionIdentifier transactionID,
 278                                                              final MutableCompositeModification modification,
 279                                                              final boolean doCommitOnReady) {
 280         final BatchedModifications batchedModifications = new BatchedModifications(transactionID, CURRENT_VERSION);
 281         batchedModifications.addModification(modification);
 282         batchedModifications.setReady(true);
 283         batchedModifications.setDoCommitOnReady(doCommitOnReady);
 284         batchedModifications.setTotalMessagesSent(1);
 285         return batchedModifications;
 286     }
 287
 288     protected static BatchedModifications prepareBatchedModifications(final TransactionIdentifier transactionID,
 289             final YangInstanceIdentifier path, final NormalizedNode<?, ?> data, final boolean doCommitOnReady) {
 290         final MutableCompositeModification modification = new MutableCompositeModification();
 291         modification.addModification(new WriteModification(path, data));
 292         return prepareBatchedModifications(transactionID, modification, doCommitOnReady);
 293     }
 294
 295     protected static ForwardedReadyTransaction prepareForwardedReadyTransaction(final TestActorRef<Shard> shard,
 296             final TransactionIdentifier transactionID, final YangInstanceIdentifier path,
 297             final NormalizedNode<?, ?> data, final boolean doCommitOnReady) {
 298         ReadWriteShardDataTreeTransaction rwTx = shard.underlyingActor().getDataStore().
 299                 newReadWriteTransaction(transactionID);
 300         rwTx.getSnapshot().write(path, data);
 301         return new ForwardedReadyTransaction(transactionID, CURRENT_VERSION, rwTx, doCommitOnReady);
 302     }
 303
 304     public static NormalizedNode<?,?> readStore(final TestActorRef<? extends Shard> shard, final YangInstanceIdentifier id)
 305             throws ExecutionException, InterruptedException {
 306         return shard.underlyingActor().getDataStore().readNode(id).orNull();
 307     }
 308
 309     public static NormalizedNode<?,?> readStore(final DataTree store, final YangInstanceIdentifier id) {
 310         return store.takeSnapshot().readNode(id).orNull();
 311     }
 312
 313     public void writeToStore(final TestActorRef<Shard> shard, final YangInstanceIdentifier id,
 314             final NormalizedNode<?,?> node) throws InterruptedException, ExecutionException {
 315         Future<Object> future = Patterns.ask(shard, newBatchedModifications(nextTransactionId(), id, node, true, true, 1),
 316                 new Timeout(5, TimeUnit.SECONDS));
 317         try {
 318             Await.ready(future, Duration.create(5, TimeUnit.SECONDS));
 319         } catch(TimeoutException e) {
 320             throw new ExecutionException(e);
 321         }
 322     }
 323
 324     public static void writeToStore(final ShardDataTree store, final YangInstanceIdentifier id,
 325             final NormalizedNode<?,?> node) throws InterruptedException, ExecutionException {
 326         final ReadWriteShardDataTreeTransaction transaction = store.newReadWriteTransaction(nextTransactionId());
 327
 328         transaction.getSnapshot().write(id, node);
 329         final ShardDataTreeCohort cohort = transaction.ready();
 330         immediateCanCommit(cohort);
 331         immediatePreCommit(cohort);
 332         immediateCommit(cohort);
 333     }
 334
 335     public void mergeToStore(final ShardDataTree store, final YangInstanceIdentifier id,
 336             final NormalizedNode<?,?> node) throws InterruptedException, ExecutionException {
 337         final ReadWriteShardDataTreeTransaction transaction = store.newReadWriteTransaction(nextTransactionId());
 338
 339         transaction.getSnapshot().merge(id, node);
 340         final ShardDataTreeCohort cohort = transaction.ready();
 341         immediateCanCommit(cohort);
 342         immediatePreCommit(cohort);
 343         immediateCommit(cohort);
 344     }
 345
 346     public static void writeToStore(final DataTree store, final YangInstanceIdentifier id,
 347             final NormalizedNode<?,?> node) throws DataValidationFailedException {
 348         final DataTreeModification transaction = store.takeSnapshot().newModification();
 349
 350         transaction.write(id, node);
 351         transaction.ready();
 352         store.validate(transaction);
 353         final DataTreeCandidate candidate = store.prepare(transaction);
 354         store.commit(candidate);
 355     }
 356
 357     DataTree setupInMemorySnapshotStore() throws DataValidationFailedException {
 358         final DataTree testStore = InMemoryDataTreeFactory.getInstance().create(TreeType.OPERATIONAL);
 359         testStore.setSchemaContext(SCHEMA_CONTEXT);
 360
 361         writeToStore(testStore, TestModel.TEST_PATH, ImmutableNodes.containerNode(TestModel.TEST_QNAME));
 362
 363         final NormalizedNode<?, ?> root = readStore(testStore, YangInstanceIdentifier.EMPTY);
 364
 365         InMemorySnapshotStore.addSnapshot(shardID.toString(), Snapshot.create(
 366                 new PreBoronShardDataTreeSnapshot(root).serialize(),
 367                 Collections.<ReplicatedLogEntry>emptyList(), 0, 1, -1, -1));
 368         return testStore;
 369     }
 370
 371     static CommitTransactionPayload payloadForModification(final DataTree source, final DataTreeModification mod,
 372             final TransactionIdentifier transactionId) throws DataValidationFailedException, IOException {
 373         source.validate(mod);
 374         final DataTreeCandidate candidate = source.prepare(mod);
 375         source.commit(candidate);
 376         return CommitTransactionPayload.create(transactionId, candidate);
 377     }
 378
 379     static BatchedModifications newBatchedModifications(final TransactionIdentifier transactionID,
 380             final YangInstanceIdentifier path, final NormalizedNode<?, ?> data, final boolean ready, final boolean doCommitOnReady,
 381             final int messagesSent) {
 382         final BatchedModifications batched = new BatchedModifications(transactionID, CURRENT_VERSION);
 383         batched.addModification(new WriteModification(path, data));
 384         batched.setReady(ready);
 385         batched.setDoCommitOnReady(doCommitOnReady);
 386         batched.setTotalMessagesSent(messagesSent);
 387         return batched;
 388     }
 389
 390     @SuppressWarnings("unchecked")
 391     static void verifyOuterListEntry(final TestActorRef<Shard> shard, final Object expIDValue) throws Exception {
 392         final NormalizedNode<?, ?> outerList = readStore(shard, TestModel.OUTER_LIST_PATH);
 393         assertNotNull(TestModel.OUTER_LIST_QNAME.getLocalName() + " not found", outerList);
 394         assertTrue(TestModel.OUTER_LIST_QNAME.getLocalName() + " value is not Iterable",
 395                 outerList.getValue() instanceof Iterable);
 396         final Object entry = ((Iterable<Object>)outerList.getValue()).iterator().next();
 397         assertTrue(TestModel.OUTER_LIST_QNAME.getLocalName() + " entry is not MapEntryNode",
 398                 entry instanceof MapEntryNode);
 399         final MapEntryNode mapEntry = (MapEntryNode)entry;
 400         final Optional<DataContainerChild<? extends PathArgument, ?>> idLeaf =
 401                 mapEntry.getChild(new YangInstanceIdentifier.NodeIdentifier(TestModel.ID_QNAME));
 402         assertTrue("Missing leaf " + TestModel.ID_QNAME.getLocalName(), idLeaf.isPresent());
 403         assertEquals(TestModel.ID_QNAME.getLocalName() + " value", expIDValue, idLeaf.get().getValue());
 404     }
 405
 406     public static DataTreeCandidateTip mockCandidate(final String name) {
 407         final DataTreeCandidateTip mockCandidate = mock(DataTreeCandidateTip.class, name);
 408         final DataTreeCandidateNode mockCandidateNode = mock(DataTreeCandidateNode.class, name + "-node");
 409         doReturn(ModificationType.WRITE).when(mockCandidateNode).getModificationType();
 410         doReturn(Optional.of(ImmutableNodes.containerNode(CarsModel.CARS_QNAME))).when(mockCandidateNode).getDataAfter();
 411         doReturn(CarsModel.BASE_PATH).when(mockCandidate).getRootPath();
 412         doReturn(mockCandidateNode).when(mockCandidate).getRootNode();
 413         return mockCandidate;
 414     }
 415
 416     static DataTreeCandidateTip mockUnmodifiedCandidate(final String name) {
 417         final DataTreeCandidateTip mockCandidate = mock(DataTreeCandidateTip.class, name);
 418         final DataTreeCandidateNode mockCandidateNode = mock(DataTreeCandidateNode.class, name + "-node");
 419         doReturn(ModificationType.UNMODIFIED).when(mockCandidateNode).getModificationType();
 420         doReturn(YangInstanceIdentifier.EMPTY).when(mockCandidate).getRootPath();
 421         doReturn(mockCandidateNode).when(mockCandidate).getRootNode();
 422         return mockCandidate;
 423     }
 424
 425     static void commitTransaction(final DataTree store, final DataTreeModification modification) throws DataValidationFailedException {
 426         modification.ready();
 427         store.validate(modification);
 428         store.commit(store.prepare(modification));
 429     }
 430
 431     @SuppressWarnings("serial")
 432     public static final class DelegatingShardCreator implements Creator<Shard> {
 433         private final Creator<Shard> delegate;
 434
 435         DelegatingShardCreator(final Creator<Shard> delegate) {
 436             this.delegate = delegate;
 437         }
 438
 439         @Override
 440         public Shard create() throws Exception {
 441             return delegate.create();
 442         }
 443     }
 444
 445     public static class CapturingShardDataTreeCohort extends ShardDataTreeCohort {
 446         private volatile ShardDataTreeCohort delegate;
 447         private FutureCallback<Void> canCommit;
 448         private FutureCallback<DataTreeCandidate> preCommit;
 449         private FutureCallback<UnsignedLong> commit;
 450
 451         public void setDelegate(ShardDataTreeCohort delegate) {
 452             this.delegate = delegate;
 453         }
 454
 455         public FutureCallback<Void> getCanCommit() {
 456             assertNotNull("canCommit was not invoked", canCommit);
 457             return canCommit;
 458         }
 459
 460         public FutureCallback<DataTreeCandidate> getPreCommit() {
 461             assertNotNull("preCommit was not invoked", preCommit);
 462             return preCommit;
 463         }
 464
 465         public FutureCallback<UnsignedLong> getCommit() {
 466             assertNotNull("commit was not invoked", commit);
 467             return commit;
 468         }
 469
 470         @Override
 471         public TransactionIdentifier getIdentifier() {
 472             return delegate.getIdentifier();
 473         }
 474
 475         @Override
 476         DataTreeCandidateTip getCandidate() {
 477             return delegate.getCandidate();
 478         }
 479
 480         @Override
 481         DataTreeModification getDataTreeModification() {
 482             return delegate.getDataTreeModification();
 483         }
 484
 485         @Override
 486         public void canCommit(FutureCallback<Void> callback) {
 487             canCommit = mockFutureCallback(callback);
 488             delegate.canCommit(canCommit);
 489         }
 490
 491         @Override
 492         public void preCommit(FutureCallback<DataTreeCandidate> callback) {
 493             preCommit = mockFutureCallback(callback);
 494             delegate.preCommit(preCommit);
 495         }
 496
 497         @Override
 498         public void commit(FutureCallback<UnsignedLong> callback) {
 499             commit = mockFutureCallback(callback);
 500             delegate.commit(commit);
 501         }
 502
 503         @SuppressWarnings("unchecked")
 504         private <T> FutureCallback<T> mockFutureCallback(final FutureCallback<T> actual ) {
 505             FutureCallback<T> mock = mock(FutureCallback.class);
 506             doAnswer(invocation -> {
 507                 actual.onFailure(invocation.getArgumentAt(0, Throwable.class));
 508                 return null;
 509             }).when(mock).onFailure(any(Throwable.class));
 510
 511             doAnswer(invocation -> {
 512                 actual.onSuccess((T) invocation.getArgumentAt(0, Throwable.class));
 513                 return null;
 514             }).when(mock).onSuccess((T) any(Object.class));
 515
 516             return mock;
 517         }
 518
 519         @Override
 520         public ListenableFuture<Void> abort() {
 521             return delegate.abort();
 522         }
 523
 524         @Override
 525         public boolean isFailed() {
 526             return delegate.isFailed();
 527         }
 528
 529         @Override
 530         public State getState() {
 531             return delegate.getState();
 532         }
 533     }
 534 }