opendaylight/md-sal/sal-distributed-datastore/src/test/java/org/opendaylight/controller/cluster/datastore/ShardDataTreeTest.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
   9 package org.opendaylight.controller.cluster.datastore;
  10
  11 import static org.junit.Assert.assertEquals;
  12 import static org.junit.Assert.assertNotNull;
  13 import static org.junit.Assert.assertTrue;
  14 import static org.junit.Assert.fail;
  15 import static org.mockito.Matchers.any;
  16 import static org.mockito.Matchers.anyBoolean;
  17 import static org.mockito.Matchers.eq;
  18 import static org.mockito.Mockito.atLeastOnce;
  19 import static org.mockito.Mockito.doNothing;
  20 import static org.mockito.Mockito.doReturn;
  21 import static org.mockito.Mockito.inOrder;
  22 import static org.mockito.Mockito.mock;
  23 import static org.mockito.Mockito.never;
  24 import static org.mockito.Mockito.reset;
  25 import static org.mockito.Mockito.verify;
  26 import static org.mockito.Mockito.verifyNoMoreInteractions;
  27 import static org.opendaylight.controller.cluster.datastore.ShardDataTreeMocking.coordinatedCanCommit;
  28 import static org.opendaylight.controller.cluster.datastore.ShardDataTreeMocking.coordinatedCommit;
  29 import static org.opendaylight.controller.cluster.datastore.ShardDataTreeMocking.coordinatedPreCommit;
  30 import static org.opendaylight.controller.cluster.datastore.ShardDataTreeMocking.immediate3PhaseCommit;
  31 import static org.opendaylight.controller.cluster.datastore.ShardDataTreeMocking.immediateCanCommit;
  32 import static org.opendaylight.controller.cluster.datastore.ShardDataTreeMocking.immediateCommit;
  33 import static org.opendaylight.controller.cluster.datastore.ShardDataTreeMocking.immediatePayloadReplication;
  34 import static org.opendaylight.controller.cluster.datastore.ShardDataTreeMocking.immediatePreCommit;
  35
  36 import com.google.common.base.Ticker;
  37 import com.google.common.collect.Maps;
  38 import com.google.common.primitives.UnsignedLong;
  39 import com.google.common.util.concurrent.FutureCallback;
  40 import java.math.BigInteger;
  41 import java.util.ArrayList;
  42 import java.util.Collection;
  43 import java.util.List;
  44 import java.util.Map;
  45 import java.util.Optional;
  46 import java.util.function.Consumer;
  47 import org.junit.Before;
  48 import org.junit.Test;
  49 import org.mockito.ArgumentCaptor;
  50 import org.mockito.InOrder;
  51 import org.mockito.Mockito;
  52 import org.opendaylight.controller.cluster.datastore.jmx.mbeans.shard.ShardStats;
  53 import org.opendaylight.controller.cluster.datastore.persisted.CommitTransactionPayload;
  54 import org.opendaylight.controller.md.cluster.datastore.model.CarsModel;
  55 import org.opendaylight.controller.md.cluster.datastore.model.PeopleModel;
  56 import org.opendaylight.controller.md.cluster.datastore.model.SchemaContextHelper;
  57 import org.opendaylight.mdsal.dom.api.DOMDataTreeChangeListener;
  58 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  59 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  60 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  61 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
  62 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidates;
  63 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
  64 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshot;
  65 import org.opendaylight.yangtools.yang.data.api.schema.tree.ModificationType;
  66 import org.opendaylight.yangtools.yang.data.api.schema.tree.TreeType;
  67 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  68
  69 public class ShardDataTreeTest extends AbstractTest {
  70
  71     private final Shard mockShard = Mockito.mock(Shard.class);
  72     private ShardDataTree shardDataTree;
  73     private SchemaContext fullSchema;
  74
  75     @Before
  76     public void setUp() {
  77         doReturn(Ticker.systemTicker()).when(mockShard).ticker();
  78         doReturn(Mockito.mock(ShardStats.class)).when(mockShard).getShardMBean();
  79
  80         fullSchema = SchemaContextHelper.full();
  81
  82         shardDataTree = new ShardDataTree(mockShard, fullSchema, TreeType.OPERATIONAL);
  83     }
  84
  85     @Test
  86     public void testWrite() {
  87         modify(false, true, true);
  88     }
  89
  90     @Test
  91     public void testMerge() {
  92         modify(true, true, true);
  93     }
  94
  95     private void modify(final boolean merge, final boolean expectedCarsPresent, final boolean expectedPeoplePresent) {
  96         immediatePayloadReplication(shardDataTree, mockShard);
  97
  98         assertEquals(fullSchema, shardDataTree.getSchemaContext());
  99
 100         final ReadWriteShardDataTreeTransaction transaction =
 101                 shardDataTree.newReadWriteTransaction(nextTransactionId());
 102
 103         final DataTreeModification snapshot = transaction.getSnapshot();
 104
 105         assertNotNull(snapshot);
 106
 107         if (merge) {
 108             snapshot.merge(CarsModel.BASE_PATH, CarsModel.create());
 109             snapshot.merge(PeopleModel.BASE_PATH, PeopleModel.create());
 110         } else {
 111             snapshot.write(CarsModel.BASE_PATH, CarsModel.create());
 112             snapshot.write(PeopleModel.BASE_PATH, PeopleModel.create());
 113         }
 114
 115         final ShardDataTreeCohort cohort = shardDataTree.finishTransaction(transaction, Optional.empty());
 116
 117         immediateCanCommit(cohort);
 118         immediatePreCommit(cohort);
 119         immediateCommit(cohort);
 120
 121         final ReadOnlyShardDataTreeTransaction readOnlyShardDataTreeTransaction =
 122                 shardDataTree.newReadOnlyTransaction(nextTransactionId());
 123
 124         final DataTreeSnapshot snapshot1 = readOnlyShardDataTreeTransaction.getSnapshot();
 125
 126         final Optional<NormalizedNode<?, ?>> optional = snapshot1.readNode(CarsModel.BASE_PATH);
 127
 128         assertEquals(expectedCarsPresent, optional.isPresent());
 129
 130         final Optional<NormalizedNode<?, ?>> optional1 = snapshot1.readNode(PeopleModel.BASE_PATH);
 131
 132         assertEquals(expectedPeoplePresent, optional1.isPresent());
 133     }
 134
 135     @Test
 136     public void bug4359AddRemoveCarOnce() {
 137         immediatePayloadReplication(shardDataTree, mockShard);
 138
 139         final List<DataTreeCandidate> candidates = new ArrayList<>();
 140         candidates.add(addCar(shardDataTree));
 141         candidates.add(removeCar(shardDataTree));
 142
 143         final NormalizedNode<?, ?> expected = getCars(shardDataTree);
 144
 145         applyCandidates(shardDataTree, candidates);
 146
 147         final NormalizedNode<?, ?> actual = getCars(shardDataTree);
 148
 149         assertEquals(expected, actual);
 150     }
 151
 152     @Test
 153     public void bug4359AddRemoveCarTwice() {
 154         immediatePayloadReplication(shardDataTree, mockShard);
 155
 156         final List<DataTreeCandidate> candidates = new ArrayList<>();
 157         candidates.add(addCar(shardDataTree));
 158         candidates.add(removeCar(shardDataTree));
 159         candidates.add(addCar(shardDataTree));
 160         candidates.add(removeCar(shardDataTree));
 161
 162         final NormalizedNode<?, ?> expected = getCars(shardDataTree);
 163
 164         applyCandidates(shardDataTree, candidates);
 165
 166         final NormalizedNode<?, ?> actual = getCars(shardDataTree);
 167
 168         assertEquals(expected, actual);
 169     }
 170
 171     @Test
 172     public void testListenerNotifiedOnApplySnapshot() throws Exception {
 173         immediatePayloadReplication(shardDataTree, mockShard);
 174
 175         DOMDataTreeChangeListener listener = mock(DOMDataTreeChangeListener.class);
 176         shardDataTree.registerTreeChangeListener(CarsModel.CAR_LIST_PATH.node(CarsModel.CAR_QNAME), listener,
 177             com.google.common.base.Optional.absent(), noop -> { });
 178
 179         addCar(shardDataTree, "optima");
 180
 181         verifyOnDataTreeChanged(listener, dtc -> {
 182             assertEquals("getModificationType", ModificationType.WRITE, dtc.getRootNode().getModificationType());
 183             assertEquals("getRootPath", CarsModel.newCarPath("optima"), dtc.getRootPath());
 184         });
 185
 186         addCar(shardDataTree, "sportage");
 187
 188         verifyOnDataTreeChanged(listener, dtc -> {
 189             assertEquals("getModificationType", ModificationType.WRITE, dtc.getRootNode().getModificationType());
 190             assertEquals("getRootPath", CarsModel.newCarPath("sportage"), dtc.getRootPath());
 191         });
 192
 193         ShardDataTree newDataTree = new ShardDataTree(mockShard, fullSchema, TreeType.OPERATIONAL);
 194         immediatePayloadReplication(newDataTree, mockShard);
 195         addCar(newDataTree, "optima");
 196         addCar(newDataTree, "murano");
 197
 198         shardDataTree.applySnapshot(newDataTree.takeStateSnapshot());
 199
 200         Map<YangInstanceIdentifier, ModificationType> expChanges = Maps.newHashMap();
 201         expChanges.put(CarsModel.newCarPath("optima"), ModificationType.WRITE);
 202         expChanges.put(CarsModel.newCarPath("murano"), ModificationType.WRITE);
 203         expChanges.put(CarsModel.newCarPath("sportage"), ModificationType.DELETE);
 204         verifyOnDataTreeChanged(listener, dtc -> {
 205             ModificationType expType = expChanges.remove(dtc.getRootPath());
 206             assertNotNull("Got unexpected change for " + dtc.getRootPath(), expType);
 207             assertEquals("getModificationType", expType, dtc.getRootNode().getModificationType());
 208         });
 209
 210         if (!expChanges.isEmpty()) {
 211             fail("Missing change notifications: " + expChanges);
 212         }
 213     }
 214
 215     @Test
 216     public void testPipelinedTransactionsWithCoordinatedCommits() throws Exception {
 217         final ShardDataTreeCohort cohort1 = newShardDataTreeCohort(snapshot ->
 218             snapshot.write(CarsModel.BASE_PATH, CarsModel.emptyContainer()));
 219
 220         final ShardDataTreeCohort cohort2 = newShardDataTreeCohort(snapshot ->
 221             snapshot.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode()));
 222
 223         NormalizedNode<?, ?> peopleNode = PeopleModel.create();
 224         final ShardDataTreeCohort cohort3 = newShardDataTreeCohort(snapshot ->
 225             snapshot.write(PeopleModel.BASE_PATH, peopleNode));
 226
 227         YangInstanceIdentifier carPath = CarsModel.newCarPath("optima");
 228         MapEntryNode carNode = CarsModel.newCarEntry("optima", new BigInteger("100"));
 229         final ShardDataTreeCohort cohort4 = newShardDataTreeCohort(snapshot -> snapshot.write(carPath, carNode));
 230
 231         immediateCanCommit(cohort1);
 232         final FutureCallback<Void> canCommitCallback2 = coordinatedCanCommit(cohort2);
 233         final FutureCallback<Void> canCommitCallback3 = coordinatedCanCommit(cohort3);
 234         final FutureCallback<Void> canCommitCallback4 = coordinatedCanCommit(cohort4);
 235
 236         final FutureCallback<DataTreeCandidate> preCommitCallback1 = coordinatedPreCommit(cohort1);
 237         verify(preCommitCallback1).onSuccess(cohort1.getCandidate());
 238         verify(canCommitCallback2).onSuccess(null);
 239
 240         final FutureCallback<DataTreeCandidate> preCommitCallback2 = coordinatedPreCommit(cohort2);
 241         verify(preCommitCallback2).onSuccess(cohort2.getCandidate());
 242         verify(canCommitCallback3).onSuccess(null);
 243
 244         final FutureCallback<DataTreeCandidate> preCommitCallback3 = coordinatedPreCommit(cohort3);
 245         verify(preCommitCallback3).onSuccess(cohort3.getCandidate());
 246         verify(canCommitCallback4).onSuccess(null);
 247
 248         final FutureCallback<DataTreeCandidate> preCommitCallback4 = coordinatedPreCommit(cohort4);
 249         verify(preCommitCallback4).onSuccess(cohort4.getCandidate());
 250
 251         final FutureCallback<UnsignedLong> commitCallback2 = coordinatedCommit(cohort2);
 252         verify(mockShard, never()).persistPayload(eq(cohort1.getIdentifier()), any(CommitTransactionPayload.class),
 253                 anyBoolean());
 254         verifyNoMoreInteractions(commitCallback2);
 255
 256         final FutureCallback<UnsignedLong> commitCallback4 = coordinatedCommit(cohort4);
 257         verify(mockShard, never()).persistPayload(eq(cohort4.getIdentifier()), any(CommitTransactionPayload.class),
 258                 anyBoolean());
 259         verifyNoMoreInteractions(commitCallback4);
 260
 261         final FutureCallback<UnsignedLong> commitCallback1 = coordinatedCommit(cohort1);
 262         InOrder inOrder = inOrder(mockShard);
 263         inOrder.verify(mockShard).persistPayload(eq(cohort1.getIdentifier()), any(CommitTransactionPayload.class),
 264                 eq(true));
 265         inOrder.verify(mockShard).persistPayload(eq(cohort2.getIdentifier()), any(CommitTransactionPayload.class),
 266                 eq(false));
 267         verifyNoMoreInteractions(commitCallback1);
 268         verifyNoMoreInteractions(commitCallback2);
 269
 270         final FutureCallback<UnsignedLong> commitCallback3 = coordinatedCommit(cohort3);
 271         inOrder = inOrder(mockShard);
 272         inOrder.verify(mockShard).persistPayload(eq(cohort3.getIdentifier()), any(CommitTransactionPayload.class),
 273                 eq(true));
 274         inOrder.verify(mockShard).persistPayload(eq(cohort4.getIdentifier()), any(CommitTransactionPayload.class),
 275                 eq(false));
 276         verifyNoMoreInteractions(commitCallback3);
 277         verifyNoMoreInteractions(commitCallback4);
 278
 279         final ShardDataTreeCohort cohort5 = newShardDataTreeCohort(snapshot ->
 280             snapshot.merge(CarsModel.BASE_PATH, CarsModel.emptyContainer()));
 281         final FutureCallback<Void> canCommitCallback5 = coordinatedCanCommit(cohort5);
 282
 283         // The payload instance doesn't matter - it just needs to be of type CommitTransactionPayload.
 284         CommitTransactionPayload mockPayload = CommitTransactionPayload.create(nextTransactionId(),
 285                 cohort1.getCandidate());
 286         shardDataTree.applyReplicatedPayload(cohort1.getIdentifier(), mockPayload);
 287         shardDataTree.applyReplicatedPayload(cohort2.getIdentifier(), mockPayload);
 288         shardDataTree.applyReplicatedPayload(cohort3.getIdentifier(), mockPayload);
 289         shardDataTree.applyReplicatedPayload(cohort4.getIdentifier(), mockPayload);
 290
 291         inOrder = inOrder(commitCallback1, commitCallback2, commitCallback3, commitCallback4);
 292         inOrder.verify(commitCallback1).onSuccess(any(UnsignedLong.class));
 293         inOrder.verify(commitCallback2).onSuccess(any(UnsignedLong.class));
 294         inOrder.verify(commitCallback3).onSuccess(any(UnsignedLong.class));
 295         inOrder.verify(commitCallback4).onSuccess(any(UnsignedLong.class));
 296
 297         verify(canCommitCallback5).onSuccess(null);
 298
 299         final DataTreeSnapshot snapshot =
 300                 shardDataTree.newReadOnlyTransaction(nextTransactionId()).getSnapshot();
 301         Optional<NormalizedNode<?, ?>> optional = snapshot.readNode(carPath);
 302         assertTrue("Car node present", optional.isPresent());
 303         assertEquals("Car node", carNode, optional.get());
 304
 305         optional = snapshot.readNode(PeopleModel.BASE_PATH);
 306         assertTrue("People node present", optional.isPresent());
 307         assertEquals("People node", peopleNode, optional.get());
 308     }
 309
 310     @Test
 311     public void testPipelinedTransactionsWithImmediateCommits() throws Exception {
 312         final ShardDataTreeCohort cohort1 = newShardDataTreeCohort(snapshot ->
 313             snapshot.write(CarsModel.BASE_PATH, CarsModel.emptyContainer()));
 314
 315         final ShardDataTreeCohort cohort2 = newShardDataTreeCohort(snapshot ->
 316             snapshot.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode()));
 317
 318         YangInstanceIdentifier carPath = CarsModel.newCarPath("optima");
 319         MapEntryNode carNode = CarsModel.newCarEntry("optima", new BigInteger("100"));
 320         final ShardDataTreeCohort cohort3 = newShardDataTreeCohort(snapshot -> snapshot.write(carPath, carNode));
 321
 322         final FutureCallback<UnsignedLong> commitCallback2 = immediate3PhaseCommit(cohort2);
 323         final FutureCallback<UnsignedLong> commitCallback3 = immediate3PhaseCommit(cohort3);
 324         final FutureCallback<UnsignedLong> commitCallback1 = immediate3PhaseCommit(cohort1);
 325
 326         InOrder inOrder = inOrder(mockShard);
 327         inOrder.verify(mockShard).persistPayload(eq(cohort1.getIdentifier()), any(CommitTransactionPayload.class),
 328                 eq(true));
 329         inOrder.verify(mockShard).persistPayload(eq(cohort2.getIdentifier()), any(CommitTransactionPayload.class),
 330                 eq(true));
 331         inOrder.verify(mockShard).persistPayload(eq(cohort3.getIdentifier()), any(CommitTransactionPayload.class),
 332                 eq(false));
 333
 334         // The payload instance doesn't matter - it just needs to be of type CommitTransactionPayload.
 335         CommitTransactionPayload mockPayload = CommitTransactionPayload.create(nextTransactionId(),
 336                 cohort1.getCandidate());
 337         shardDataTree.applyReplicatedPayload(cohort1.getIdentifier(), mockPayload);
 338         shardDataTree.applyReplicatedPayload(cohort2.getIdentifier(), mockPayload);
 339         shardDataTree.applyReplicatedPayload(cohort3.getIdentifier(), mockPayload);
 340
 341         inOrder = inOrder(commitCallback1, commitCallback2, commitCallback3);
 342         inOrder.verify(commitCallback1).onSuccess(any(UnsignedLong.class));
 343         inOrder.verify(commitCallback2).onSuccess(any(UnsignedLong.class));
 344         inOrder.verify(commitCallback3).onSuccess(any(UnsignedLong.class));
 345
 346         final DataTreeSnapshot snapshot =
 347                 shardDataTree.newReadOnlyTransaction(nextTransactionId()).getSnapshot();
 348         Optional<NormalizedNode<?, ?>> optional = snapshot.readNode(carPath);
 349         assertTrue("Car node present", optional.isPresent());
 350         assertEquals("Car node", carNode, optional.get());
 351     }
 352
 353     @Test
 354     public void testPipelinedTransactionsWithImmediateReplication() {
 355         immediatePayloadReplication(shardDataTree, mockShard);
 356
 357         final ShardDataTreeCohort cohort1 = newShardDataTreeCohort(snapshot ->
 358             snapshot.write(CarsModel.BASE_PATH, CarsModel.emptyContainer()));
 359
 360         final ShardDataTreeCohort cohort2 = newShardDataTreeCohort(snapshot ->
 361             snapshot.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode()));
 362
 363         YangInstanceIdentifier carPath = CarsModel.newCarPath("optima");
 364         MapEntryNode carNode = CarsModel.newCarEntry("optima", new BigInteger("100"));
 365         final ShardDataTreeCohort cohort3 = newShardDataTreeCohort(snapshot -> snapshot.write(carPath, carNode));
 366
 367         final FutureCallback<UnsignedLong> commitCallback1 = immediate3PhaseCommit(cohort1);
 368         final FutureCallback<UnsignedLong> commitCallback2 = immediate3PhaseCommit(cohort2);
 369         final FutureCallback<UnsignedLong> commitCallback3 = immediate3PhaseCommit(cohort3);
 370
 371         InOrder inOrder = inOrder(commitCallback1, commitCallback2, commitCallback3);
 372         inOrder.verify(commitCallback1).onSuccess(any(UnsignedLong.class));
 373         inOrder.verify(commitCallback2).onSuccess(any(UnsignedLong.class));
 374         inOrder.verify(commitCallback3).onSuccess(any(UnsignedLong.class));
 375
 376         final DataTreeSnapshot snapshot = shardDataTree.newReadOnlyTransaction(nextTransactionId()).getSnapshot();
 377         Optional<NormalizedNode<?, ?>> optional = snapshot.readNode(CarsModel.BASE_PATH);
 378         assertTrue("Car node present", optional.isPresent());
 379     }
 380
 381     @SuppressWarnings("unchecked")
 382     @Test
 383     public void testAbortWithPendingCommits() throws Exception {
 384         final ShardDataTreeCohort cohort1 = newShardDataTreeCohort(snapshot ->
 385             snapshot.write(CarsModel.BASE_PATH, CarsModel.emptyContainer()));
 386
 387         final ShardDataTreeCohort cohort2 = newShardDataTreeCohort(snapshot ->
 388             snapshot.write(PeopleModel.BASE_PATH, PeopleModel.create()));
 389
 390         final ShardDataTreeCohort cohort3 = newShardDataTreeCohort(snapshot ->
 391             snapshot.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode()));
 392
 393         YangInstanceIdentifier carPath = CarsModel.newCarPath("optima");
 394         MapEntryNode carNode = CarsModel.newCarEntry("optima", new BigInteger("100"));
 395         final ShardDataTreeCohort cohort4 = newShardDataTreeCohort(snapshot -> snapshot.write(carPath, carNode));
 396
 397         coordinatedCanCommit(cohort2);
 398         immediateCanCommit(cohort1);
 399         coordinatedCanCommit(cohort3);
 400         coordinatedCanCommit(cohort4);
 401
 402         coordinatedPreCommit(cohort1);
 403         coordinatedPreCommit(cohort2);
 404         coordinatedPreCommit(cohort3);
 405
 406         FutureCallback<Void> mockAbortCallback = mock(FutureCallback.class);
 407         doNothing().when(mockAbortCallback).onSuccess(null);
 408         cohort2.abort(mockAbortCallback);
 409         verify(mockAbortCallback).onSuccess(null);
 410
 411         coordinatedPreCommit(cohort4);
 412         coordinatedCommit(cohort1);
 413         coordinatedCommit(cohort3);
 414         coordinatedCommit(cohort4);
 415
 416         InOrder inOrder = inOrder(mockShard);
 417         inOrder.verify(mockShard).persistPayload(eq(cohort1.getIdentifier()), any(CommitTransactionPayload.class),
 418                 eq(false));
 419         inOrder.verify(mockShard).persistPayload(eq(cohort3.getIdentifier()), any(CommitTransactionPayload.class),
 420                 eq(false));
 421         inOrder.verify(mockShard).persistPayload(eq(cohort4.getIdentifier()), any(CommitTransactionPayload.class),
 422                 eq(false));
 423
 424         // The payload instance doesn't matter - it just needs to be of type CommitTransactionPayload.
 425         CommitTransactionPayload mockPayload = CommitTransactionPayload.create(nextTransactionId(),
 426                 cohort1.getCandidate());
 427         shardDataTree.applyReplicatedPayload(cohort1.getIdentifier(), mockPayload);
 428         shardDataTree.applyReplicatedPayload(cohort3.getIdentifier(), mockPayload);
 429         shardDataTree.applyReplicatedPayload(cohort4.getIdentifier(), mockPayload);
 430
 431         final DataTreeSnapshot snapshot =
 432                 shardDataTree.newReadOnlyTransaction(nextTransactionId()).getSnapshot();
 433         Optional<NormalizedNode<?, ?>> optional = snapshot.readNode(carPath);
 434         assertTrue("Car node present", optional.isPresent());
 435         assertEquals("Car node", carNode, optional.get());
 436     }
 437
 438     @SuppressWarnings("unchecked")
 439     @Test
 440     public void testAbortWithFailedRebase() {
 441         immediatePayloadReplication(shardDataTree, mockShard);
 442
 443         final ShardDataTreeCohort cohort1 = newShardDataTreeCohort(snapshot ->
 444             snapshot.write(CarsModel.BASE_PATH, CarsModel.emptyContainer()));
 445
 446         final ShardDataTreeCohort cohort2 = newShardDataTreeCohort(snapshot ->
 447             snapshot.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode()));
 448
 449         NormalizedNode<?, ?> peopleNode = PeopleModel.create();
 450         final ShardDataTreeCohort cohort3 = newShardDataTreeCohort(snapshot ->
 451             snapshot.write(PeopleModel.BASE_PATH, peopleNode));
 452
 453         immediateCanCommit(cohort1);
 454         FutureCallback<Void> canCommitCallback2 = coordinatedCanCommit(cohort2);
 455
 456         coordinatedPreCommit(cohort1);
 457         verify(canCommitCallback2).onSuccess(null);
 458
 459         FutureCallback<Void> mockAbortCallback = mock(FutureCallback.class);
 460         doNothing().when(mockAbortCallback).onSuccess(null);
 461         cohort1.abort(mockAbortCallback);
 462         verify(mockAbortCallback).onSuccess(null);
 463
 464         FutureCallback<DataTreeCandidate> preCommitCallback2 = coordinatedPreCommit(cohort2);
 465         verify(preCommitCallback2).onFailure(any(Throwable.class));
 466
 467         immediateCanCommit(cohort3);
 468         immediatePreCommit(cohort3);
 469         immediateCommit(cohort3);
 470
 471         final DataTreeSnapshot snapshot =
 472                 shardDataTree.newReadOnlyTransaction(nextTransactionId()).getSnapshot();
 473         Optional<NormalizedNode<?, ?>> optional = snapshot.readNode(PeopleModel.BASE_PATH);
 474         assertTrue("People node present", optional.isPresent());
 475         assertEquals("People node", peopleNode, optional.get());
 476     }
 477
 478     private ShardDataTreeCohort newShardDataTreeCohort(final DataTreeOperation operation) {
 479         final ReadWriteShardDataTreeTransaction transaction =
 480                 shardDataTree.newReadWriteTransaction(nextTransactionId());
 481         final DataTreeModification snapshot = transaction.getSnapshot();
 482         operation.execute(snapshot);
 483         return shardDataTree.finishTransaction(transaction, Optional.empty());
 484     }
 485
 486     @SuppressWarnings({ "rawtypes", "unchecked" })
 487     private static void verifyOnDataTreeChanged(final DOMDataTreeChangeListener listener,
 488             final Consumer<DataTreeCandidate> callback) {
 489         ArgumentCaptor<Collection> changes = ArgumentCaptor.forClass(Collection.class);
 490         verify(listener, atLeastOnce()).onDataTreeChanged(changes.capture());
 491         for (Collection list : changes.getAllValues()) {
 492             for (Object dtc : list) {
 493                 callback.accept((DataTreeCandidate)dtc);
 494             }
 495         }
 496
 497         reset(listener);
 498     }
 499
 500     private static NormalizedNode<?, ?> getCars(final ShardDataTree shardDataTree) {
 501         final ReadOnlyShardDataTreeTransaction readOnlyShardDataTreeTransaction =
 502                 shardDataTree.newReadOnlyTransaction(nextTransactionId());
 503         final DataTreeSnapshot snapshot1 = readOnlyShardDataTreeTransaction.getSnapshot();
 504
 505         final Optional<NormalizedNode<?, ?>> optional = snapshot1.readNode(CarsModel.BASE_PATH);
 506
 507         assertTrue(optional.isPresent());
 508
 509         return optional.get();
 510     }
 511
 512     private static DataTreeCandidate addCar(final ShardDataTree shardDataTree) {
 513         return addCar(shardDataTree, "altima");
 514     }
 515
 516     private static DataTreeCandidate addCar(final ShardDataTree shardDataTree, final String name) {
 517         return doTransaction(shardDataTree, snapshot -> {
 518             snapshot.merge(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 519             snapshot.merge(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());
 520             snapshot.write(CarsModel.newCarPath(name), CarsModel.newCarEntry(name, new BigInteger("100")));
 521         });
 522     }
 523
 524     private static DataTreeCandidate removeCar(final ShardDataTree shardDataTree) {
 525         return doTransaction(shardDataTree, snapshot -> snapshot.delete(CarsModel.newCarPath("altima")));
 526     }
 527
 528     @FunctionalInterface
 529     private interface DataTreeOperation {
 530         void execute(DataTreeModification snapshot);
 531     }
 532
 533     private static DataTreeCandidate doTransaction(final ShardDataTree shardDataTree,
 534             final DataTreeOperation operation) {
 535         final ReadWriteShardDataTreeTransaction transaction =
 536                 shardDataTree.newReadWriteTransaction(nextTransactionId());
 537         final DataTreeModification snapshot = transaction.getSnapshot();
 538         operation.execute(snapshot);
 539         final ShardDataTreeCohort cohort = shardDataTree.finishTransaction(transaction, Optional.empty());
 540
 541         immediateCanCommit(cohort);
 542         immediatePreCommit(cohort);
 543         final DataTreeCandidate candidate = cohort.getCandidate();
 544         immediateCommit(cohort);
 545
 546         return candidate;
 547     }
 548
 549     private static DataTreeCandidate applyCandidates(final ShardDataTree shardDataTree,
 550             final List<DataTreeCandidate> candidates) {
 551         final ReadWriteShardDataTreeTransaction transaction =
 552                 shardDataTree.newReadWriteTransaction(nextTransactionId());
 553         final DataTreeModification snapshot = transaction.getSnapshot();
 554         for (final DataTreeCandidate candidateTip : candidates) {
 555             DataTreeCandidates.applyToModification(snapshot, candidateTip);
 556         }
 557         final ShardDataTreeCohort cohort = shardDataTree.finishTransaction(transaction, Optional.empty());
 558
 559         immediateCanCommit(cohort);
 560         immediatePreCommit(cohort);
 561         final DataTreeCandidate candidate = cohort.getCandidate();
 562         immediateCommit(cohort);
 563
 564         return candidate;
 565     }
 566 }