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

   1 /*
   2  * Copyright (c) 2015, 2017 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.Matchers.eq;
  16 import static org.mockito.Mockito.timeout;
  17 import static org.mockito.Mockito.verify;
  18
  19 import akka.actor.ActorRef;
  20 import akka.actor.ActorSelection;
  21 import akka.actor.ActorSystem;
  22 import akka.actor.Address;
  23 import akka.actor.AddressFromURIString;
  24 import akka.cluster.Cluster;
  25 import akka.dispatch.Futures;
  26 import akka.pattern.Patterns;
  27 import akka.testkit.JavaTestKit;
  28 import com.google.common.base.Optional;
  29 import com.google.common.base.Stopwatch;
  30 import com.google.common.base.Supplier;
  31 import com.google.common.base.Throwables;
  32 import com.google.common.collect.ImmutableMap;
  33 import com.google.common.util.concurrent.ListenableFuture;
  34 import com.google.common.util.concurrent.MoreExecutors;
  35 import com.google.common.util.concurrent.Uninterruptibles;
  36 import com.typesafe.config.ConfigFactory;
  37 import java.math.BigInteger;
  38 import java.util.Arrays;
  39 import java.util.Collection;
  40 import java.util.Collections;
  41 import java.util.LinkedList;
  42 import java.util.List;
  43 import java.util.concurrent.ExecutionException;
  44 import java.util.concurrent.TimeUnit;
  45 import java.util.concurrent.atomic.AtomicLong;
  46 import org.junit.After;
  47 import org.junit.Assume;
  48 import org.junit.Before;
  49 import org.junit.Test;
  50 import org.junit.runner.RunWith;
  51 import org.junit.runners.Parameterized;
  52 import org.junit.runners.Parameterized.Parameter;
  53 import org.junit.runners.Parameterized.Parameters;
  54 import org.mockito.Mockito;
  55 import org.mockito.stubbing.Answer;
  56 import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
  57 import org.opendaylight.controller.cluster.databroker.ClientBackedDataStore;
  58 import org.opendaylight.controller.cluster.databroker.ConcurrentDOMDataBroker;
  59 import org.opendaylight.controller.cluster.datastore.DatastoreContext.Builder;
  60 import org.opendaylight.controller.cluster.datastore.exceptions.NoShardLeaderException;
  61 import org.opendaylight.controller.cluster.datastore.exceptions.ShardLeaderNotRespondingException;
  62 import org.opendaylight.controller.cluster.datastore.messages.CommitTransactionReply;
  63 import org.opendaylight.controller.cluster.datastore.messages.ForwardedReadyTransaction;
  64 import org.opendaylight.controller.cluster.datastore.messages.GetShardDataTree;
  65 import org.opendaylight.controller.cluster.datastore.messages.ReadyLocalTransaction;
  66 import org.opendaylight.controller.cluster.datastore.messages.ReadyTransactionReply;
  67 import org.opendaylight.controller.cluster.datastore.modification.MergeModification;
  68 import org.opendaylight.controller.cluster.datastore.modification.WriteModification;
  69 import org.opendaylight.controller.cluster.datastore.persisted.MetadataShardDataTreeSnapshot;
  70 import org.opendaylight.controller.cluster.datastore.persisted.ShardSnapshotState;
  71 import org.opendaylight.controller.cluster.raft.client.messages.Shutdown;
  72 import org.opendaylight.controller.cluster.raft.persisted.ApplyJournalEntries;
  73 import org.opendaylight.controller.cluster.raft.persisted.Snapshot;
  74 import org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy;
  75 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  76 import org.opendaylight.controller.cluster.raft.utils.InMemorySnapshotStore;
  77 import org.opendaylight.controller.md.cluster.datastore.model.CarsModel;
  78 import org.opendaylight.controller.md.cluster.datastore.model.PeopleModel;
  79 import org.opendaylight.controller.md.cluster.datastore.model.SchemaContextHelper;
  80 import org.opendaylight.controller.md.cluster.datastore.model.TestModel;
  81 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  82 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
  83 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
  84 import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
  85 import org.opendaylight.controller.md.sal.dom.api.DOMTransactionChain;
  86 import org.opendaylight.controller.sal.core.spi.data.DOMStore;
  87 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
  88 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
  89 import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
  90 import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionChain;
  91 import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
  92 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  93 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  94 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  95 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
  96 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  97 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
  98 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
  99 import org.opendaylight.yangtools.yang.data.api.schema.tree.TipProducingDataTree;
 100 import org.opendaylight.yangtools.yang.data.api.schema.tree.TreeType;
 101 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
 102 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.CollectionNodeBuilder;
 103 import org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableContainerNodeBuilder;
 104 import org.opendaylight.yangtools.yang.data.impl.schema.tree.InMemoryDataTreeFactory;
 105 import scala.concurrent.Await;
 106 import scala.concurrent.Future;
 107 import scala.concurrent.duration.FiniteDuration;
 108
 109 /**
 110  * End-to-end distributed data store tests that exercise remote shards and transactions.
 111  *
 112  * @author Thomas Pantelis
 113  */
 114 @RunWith(Parameterized.class)
 115 public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
 116
 117     @Parameters(name = "{0}")
 118     public static Collection<Object[]> data() {
 119         return Arrays.asList(new Object[][] {
 120                 { DistributedDataStore.class, 7}, { ClientBackedDataStore.class, 60 }
 121         });
 122     }
 123
 124     @Parameter(0)
 125     public Class<? extends AbstractDataStore> testParameter;
 126     @Parameter(1)
 127     public int commitTimeout;
 128
 129     private static final String[] CARS_AND_PEOPLE = {"cars", "people"};
 130     private static final String[] CARS = {"cars"};
 131
 132     private static final Address MEMBER_1_ADDRESS = AddressFromURIString.parse(
 133             "akka://cluster-test@127.0.0.1:2558");
 134     private static final Address MEMBER_2_ADDRESS = AddressFromURIString.parse(
 135             "akka://cluster-test@127.0.0.1:2559");
 136
 137     private static final String MODULE_SHARDS_CARS_ONLY_1_2 = "module-shards-cars-member-1-and-2.conf";
 138     private static final String MODULE_SHARDS_CARS_PEOPLE_1_2 = "module-shards-member1-and-2.conf";
 139     private static final String MODULE_SHARDS_CARS_PEOPLE_1_2_3 = "module-shards-member1-and-2-and-3.conf";
 140
 141     private ActorSystem leaderSystem;
 142     private ActorSystem followerSystem;
 143     private ActorSystem follower2System;
 144
 145     private final DatastoreContext.Builder leaderDatastoreContextBuilder =
 146             DatastoreContext.newBuilder().shardHeartbeatIntervalInMillis(100).shardElectionTimeoutFactor(2);
 147
 148     private final DatastoreContext.Builder followerDatastoreContextBuilder =
 149             DatastoreContext.newBuilder().shardHeartbeatIntervalInMillis(100).shardElectionTimeoutFactor(5)
 150                 .customRaftPolicyImplementation(DisableElectionsRaftPolicy.class.getName());
 151     private final TransactionIdentifier tx1 = nextTransactionId();
 152     private final TransactionIdentifier tx2 = nextTransactionId();
 153
 154     private AbstractDataStore followerDistributedDataStore;
 155     private AbstractDataStore leaderDistributedDataStore;
 156     private IntegrationTestKit followerTestKit;
 157     private IntegrationTestKit leaderTestKit;
 158
 159     @Before
 160     public void setUp() {
 161         InMemoryJournal.clear();
 162         InMemorySnapshotStore.clear();
 163
 164         leaderSystem = ActorSystem.create("cluster-test", ConfigFactory.load().getConfig("Member1"));
 165         Cluster.get(leaderSystem).join(MEMBER_1_ADDRESS);
 166
 167         followerSystem = ActorSystem.create("cluster-test", ConfigFactory.load().getConfig("Member2"));
 168         Cluster.get(followerSystem).join(MEMBER_1_ADDRESS);
 169
 170         follower2System = ActorSystem.create("cluster-test", ConfigFactory.load().getConfig("Member3"));
 171         Cluster.get(follower2System).join(MEMBER_1_ADDRESS);
 172     }
 173
 174     @After
 175     public void tearDown() {
 176         if (followerDistributedDataStore != null) {
 177             leaderDistributedDataStore.close();
 178         }
 179         if (leaderDistributedDataStore != null) {
 180             leaderDistributedDataStore.close();
 181         }
 182
 183         JavaTestKit.shutdownActorSystem(leaderSystem);
 184         JavaTestKit.shutdownActorSystem(followerSystem);
 185         JavaTestKit.shutdownActorSystem(follower2System);
 186
 187         InMemoryJournal.clear();
 188         InMemorySnapshotStore.clear();
 189     }
 190
 191     private void initDatastoresWithCars(final String type) throws Exception {
 192         initDatastores(type, MODULE_SHARDS_CARS_ONLY_1_2, CARS);
 193     }
 194
 195     private void initDatastoresWithCarsAndPeople(final String type) throws Exception {
 196         initDatastores(type, MODULE_SHARDS_CARS_PEOPLE_1_2, CARS_AND_PEOPLE);
 197     }
 198
 199     private void initDatastores(final String type, final String moduleShardsConfig, final String[] shards)
 200             throws Exception {
 201         leaderTestKit = new IntegrationTestKit(leaderSystem, leaderDatastoreContextBuilder, commitTimeout);
 202
 203         leaderDistributedDataStore = leaderTestKit.setupAbstractDataStore(
 204                 testParameter, type, moduleShardsConfig, false, shards);
 205
 206         followerTestKit = new IntegrationTestKit(followerSystem, followerDatastoreContextBuilder, commitTimeout);
 207         followerDistributedDataStore = followerTestKit.setupAbstractDataStore(
 208                 testParameter, type, moduleShardsConfig, false, shards);
 209
 210         leaderTestKit.waitUntilLeader(leaderDistributedDataStore.getActorContext(), shards);
 211     }
 212
 213     private static void verifyCars(final DOMStoreReadTransaction readTx, final MapEntryNode... entries)
 214             throws Exception {
 215         final Optional<NormalizedNode<?, ?>> optional = readTx.read(CarsModel.CAR_LIST_PATH).get(5, TimeUnit.SECONDS);
 216         assertEquals("isPresent", true, optional.isPresent());
 217
 218         final CollectionNodeBuilder<MapEntryNode, MapNode> listBuilder = ImmutableNodes.mapNodeBuilder(
 219                 CarsModel.CAR_QNAME);
 220         for (final NormalizedNode<?, ?> entry: entries) {
 221             listBuilder.withChild((MapEntryNode) entry);
 222         }
 223
 224         assertEquals("Car list node", listBuilder.build(), optional.get());
 225     }
 226
 227     private static void verifyNode(final DOMStoreReadTransaction readTx, final YangInstanceIdentifier path,
 228             final NormalizedNode<?, ?> expNode) throws Exception {
 229         final Optional<NormalizedNode<?, ?>> optional = readTx.read(path).get(5, TimeUnit.SECONDS);
 230         assertEquals("isPresent", true, optional.isPresent());
 231         assertEquals("Data node", expNode, optional.get());
 232     }
 233
 234     private static void verifyExists(final DOMStoreReadTransaction readTx, final YangInstanceIdentifier path)
 235             throws Exception {
 236         final Boolean exists = readTx.exists(path).get(5, TimeUnit.SECONDS);
 237         assertEquals("exists", true, exists);
 238     }
 239
 240     @Test
 241     public void testWriteTransactionWithSingleShard() throws Exception {
 242         final String testName = "testWriteTransactionWithSingleShard";
 243         initDatastoresWithCars(testName);
 244
 245         final String followerCarShardName = "member-2-shard-cars-" + testName;
 246
 247         DOMStoreWriteTransaction writeTx = followerDistributedDataStore.newWriteOnlyTransaction();
 248         assertNotNull("newWriteOnlyTransaction returned null", writeTx);
 249
 250         writeTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 251         writeTx.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());
 252
 253         final MapEntryNode car1 = CarsModel.newCarEntry("optima", BigInteger.valueOf(20000));
 254         final YangInstanceIdentifier car1Path = CarsModel.newCarPath("optima");
 255         writeTx.merge(car1Path, car1);
 256
 257         final MapEntryNode car2 = CarsModel.newCarEntry("sportage", BigInteger.valueOf(25000));
 258         final YangInstanceIdentifier car2Path = CarsModel.newCarPath("sportage");
 259         writeTx.merge(car2Path, car2);
 260
 261         followerTestKit.doCommit(writeTx.ready());
 262
 263         verifyCars(followerDistributedDataStore.newReadOnlyTransaction(), car1, car2);
 264
 265         verifyCars(leaderDistributedDataStore.newReadOnlyTransaction(), car1, car2);
 266
 267         // Test delete
 268
 269         writeTx = followerDistributedDataStore.newWriteOnlyTransaction();
 270
 271         writeTx.delete(car1Path);
 272
 273         followerTestKit.doCommit(writeTx.ready());
 274
 275         verifyExists(followerDistributedDataStore.newReadOnlyTransaction(), car2Path);
 276
 277         verifyCars(followerDistributedDataStore.newReadOnlyTransaction(), car2);
 278
 279         verifyCars(leaderDistributedDataStore.newReadOnlyTransaction(), car2);
 280
 281         // Re-instate the follower member 2 as a single-node to verify replication and recovery.
 282
 283         // The following is a bit tricky. Before we reinstate the follower we need to ensure it has persisted and
 284         // applied and all the log entries from the leader. Since we've verified the car data above we know that
 285         // all the transactions have been applied on the leader so we first read and capture its lastAppliedIndex.
 286         final AtomicLong leaderLastAppliedIndex = new AtomicLong();
 287         IntegrationTestKit.verifyShardState(leaderDistributedDataStore, CARS[0],
 288             state -> leaderLastAppliedIndex.set(state.getLastApplied()));
 289
 290         // Now we need to make sure the follower has persisted the leader's lastAppliedIndex via ApplyJournalEntries.
 291         // However we don't know exactly how many ApplyJournalEntries messages there will be as it can differ between
 292         // the tell-based and ask-based front-ends. For ask-based there will be exactly 2 ApplyJournalEntries but
 293         // tell-based persists additional payloads which could be replicated and applied in a batch resulting in
 294         // either 2 or 3 ApplyJournalEntries. To handle this we read the follower's persisted ApplyJournalEntries
 295         // until we find the one that encompasses the leader's lastAppliedIndex.
 296         Stopwatch sw = Stopwatch.createStarted();
 297         boolean done = false;
 298         while (!done) {
 299             final List<ApplyJournalEntries> entries = InMemoryJournal.get(followerCarShardName,
 300                     ApplyJournalEntries.class);
 301             for (ApplyJournalEntries aje: entries) {
 302                 if (aje.getToIndex() >= leaderLastAppliedIndex.get()) {
 303                     done = true;
 304                     break;
 305                 }
 306             }
 307
 308             assertTrue("Follower did not persist ApplyJournalEntries containing leader's lastAppliedIndex "
 309                     + leaderLastAppliedIndex + ". Entries persisted: " + entries, sw.elapsed(TimeUnit.SECONDS) <= 5);
 310
 311             Uninterruptibles.sleepUninterruptibly(50, TimeUnit.MILLISECONDS);
 312         }
 313
 314         JavaTestKit.shutdownActorSystem(leaderSystem, null, Boolean.TRUE);
 315         JavaTestKit.shutdownActorSystem(followerSystem, null, Boolean.TRUE);
 316
 317         final ActorSystem newSystem = newActorSystem("reinstated-member2", "Member2");
 318
 319         try (AbstractDataStore member2Datastore = new IntegrationTestKit(newSystem, leaderDatastoreContextBuilder,
 320                 commitTimeout)
 321                 .setupAbstractDataStore(testParameter, testName, "module-shards-member2", true, CARS)) {
 322             verifyCars(member2Datastore.newReadOnlyTransaction(), car2);
 323         }
 324     }
 325
 326     @Test
 327     public void testReadWriteTransactionWithSingleShard() throws Exception {
 328         initDatastoresWithCars("testReadWriteTransactionWithSingleShard");
 329
 330         final DOMStoreReadWriteTransaction rwTx = followerDistributedDataStore.newReadWriteTransaction();
 331         assertNotNull("newReadWriteTransaction returned null", rwTx);
 332
 333         rwTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 334         rwTx.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());
 335
 336         final MapEntryNode car1 = CarsModel.newCarEntry("optima", BigInteger.valueOf(20000));
 337         rwTx.merge(CarsModel.newCarPath("optima"), car1);
 338
 339         verifyCars(rwTx, car1);
 340
 341         final MapEntryNode car2 = CarsModel.newCarEntry("sportage", BigInteger.valueOf(25000));
 342         final YangInstanceIdentifier car2Path = CarsModel.newCarPath("sportage");
 343         rwTx.merge(car2Path, car2);
 344
 345         verifyExists(rwTx, car2Path);
 346
 347         followerTestKit.doCommit(rwTx.ready());
 348
 349         verifyCars(followerDistributedDataStore.newReadOnlyTransaction(), car1, car2);
 350     }
 351
 352     @Test
 353     public void testWriteTransactionWithMultipleShards() throws Exception {
 354         initDatastoresWithCarsAndPeople("testWriteTransactionWithMultipleShards");
 355
 356         final DOMStoreWriteTransaction writeTx = followerDistributedDataStore.newWriteOnlyTransaction();
 357         assertNotNull("newWriteOnlyTransaction returned null", writeTx);
 358
 359         final YangInstanceIdentifier carsPath = CarsModel.BASE_PATH;
 360         final NormalizedNode<?, ?> carsNode = CarsModel.emptyContainer();
 361         writeTx.write(carsPath, carsNode);
 362
 363         final YangInstanceIdentifier peoplePath = PeopleModel.BASE_PATH;
 364         final NormalizedNode<?, ?> peopleNode = PeopleModel.emptyContainer();
 365         writeTx.write(peoplePath, peopleNode);
 366
 367         followerTestKit.doCommit(writeTx.ready());
 368
 369         final DOMStoreReadTransaction readTx = followerDistributedDataStore.newReadOnlyTransaction();
 370
 371         verifyNode(readTx, carsPath, carsNode);
 372         verifyNode(readTx, peoplePath, peopleNode);
 373     }
 374
 375     @Test
 376     public void testReadWriteTransactionWithMultipleShards() throws Exception {
 377         initDatastoresWithCarsAndPeople("testReadWriteTransactionWithMultipleShards");
 378
 379         final DOMStoreReadWriteTransaction rwTx = followerDistributedDataStore.newReadWriteTransaction();
 380         assertNotNull("newReadWriteTransaction returned null", rwTx);
 381
 382         final YangInstanceIdentifier carsPath = CarsModel.BASE_PATH;
 383         final NormalizedNode<?, ?> carsNode = CarsModel.emptyContainer();
 384         rwTx.write(carsPath, carsNode);
 385
 386         final YangInstanceIdentifier peoplePath = PeopleModel.BASE_PATH;
 387         final NormalizedNode<?, ?> peopleNode = PeopleModel.emptyContainer();
 388         rwTx.write(peoplePath, peopleNode);
 389
 390         followerTestKit.doCommit(rwTx.ready());
 391
 392         final DOMStoreReadTransaction readTx = followerDistributedDataStore.newReadOnlyTransaction();
 393
 394         verifyNode(readTx, carsPath, carsNode);
 395         verifyNode(readTx, peoplePath, peopleNode);
 396     }
 397
 398     @Test
 399     public void testTransactionChainWithSingleShard() throws Exception {
 400         initDatastoresWithCars("testTransactionChainWithSingleShard");
 401
 402         final DOMStoreTransactionChain txChain = followerDistributedDataStore.createTransactionChain();
 403
 404         // Add the top-level cars container with write-only.
 405
 406         final DOMStoreWriteTransaction writeTx = txChain.newWriteOnlyTransaction();
 407         assertNotNull("newWriteOnlyTransaction returned null", writeTx);
 408
 409         writeTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 410
 411         final DOMStoreThreePhaseCommitCohort writeTxReady = writeTx.ready();
 412
 413         // Verify the top-level cars container with read-only.
 414
 415         verifyNode(txChain.newReadOnlyTransaction(), CarsModel.BASE_PATH, CarsModel.emptyContainer());
 416
 417         // Perform car operations with read-write.
 418
 419         final DOMStoreReadWriteTransaction rwTx = txChain.newReadWriteTransaction();
 420
 421         verifyNode(rwTx, CarsModel.BASE_PATH, CarsModel.emptyContainer());
 422
 423         rwTx.merge(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());
 424
 425         final MapEntryNode car1 = CarsModel.newCarEntry("optima", BigInteger.valueOf(20000));
 426         final YangInstanceIdentifier car1Path = CarsModel.newCarPath("optima");
 427         rwTx.write(car1Path, car1);
 428
 429         verifyExists(rwTx, car1Path);
 430
 431         verifyCars(rwTx, car1);
 432
 433         final MapEntryNode car2 = CarsModel.newCarEntry("sportage", BigInteger.valueOf(25000));
 434         rwTx.merge(CarsModel.newCarPath("sportage"), car2);
 435
 436         rwTx.delete(car1Path);
 437
 438         followerTestKit.doCommit(writeTxReady);
 439
 440         followerTestKit.doCommit(rwTx.ready());
 441
 442         txChain.close();
 443
 444         verifyCars(followerDistributedDataStore.newReadOnlyTransaction(), car2);
 445     }
 446
 447     @Test
 448     public void testTransactionChainWithMultipleShards() throws Exception {
 449         initDatastoresWithCarsAndPeople("testTransactionChainWithMultipleShards");
 450
 451         final DOMStoreTransactionChain txChain = followerDistributedDataStore.createTransactionChain();
 452
 453         DOMStoreWriteTransaction writeTx = txChain.newWriteOnlyTransaction();
 454         assertNotNull("newWriteOnlyTransaction returned null", writeTx);
 455
 456         writeTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 457         writeTx.write(PeopleModel.BASE_PATH, PeopleModel.emptyContainer());
 458
 459         writeTx.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());
 460         writeTx.write(PeopleModel.PERSON_LIST_PATH, PeopleModel.newPersonMapNode());
 461
 462         followerTestKit.doCommit(writeTx.ready());
 463
 464         final DOMStoreReadWriteTransaction readWriteTx = txChain.newReadWriteTransaction();
 465
 466         final MapEntryNode car = CarsModel.newCarEntry("optima", BigInteger.valueOf(20000));
 467         final YangInstanceIdentifier carPath = CarsModel.newCarPath("optima");
 468         readWriteTx.write(carPath, car);
 469
 470         final MapEntryNode person = PeopleModel.newPersonEntry("jack");
 471         final YangInstanceIdentifier personPath = PeopleModel.newPersonPath("jack");
 472         readWriteTx.merge(personPath, person);
 473
 474         Optional<NormalizedNode<?, ?>> optional = readWriteTx.read(carPath).get(5, TimeUnit.SECONDS);
 475         assertEquals("isPresent", true, optional.isPresent());
 476         assertEquals("Data node", car, optional.get());
 477
 478         optional = readWriteTx.read(personPath).get(5, TimeUnit.SECONDS);
 479         assertEquals("isPresent", true, optional.isPresent());
 480         assertEquals("Data node", person, optional.get());
 481
 482         final DOMStoreThreePhaseCommitCohort cohort2 = readWriteTx.ready();
 483
 484         writeTx = txChain.newWriteOnlyTransaction();
 485
 486         writeTx.delete(personPath);
 487
 488         final DOMStoreThreePhaseCommitCohort cohort3 = writeTx.ready();
 489
 490         followerTestKit.doCommit(cohort2);
 491         followerTestKit.doCommit(cohort3);
 492
 493         txChain.close();
 494
 495         final DOMStoreReadTransaction readTx = followerDistributedDataStore.newReadOnlyTransaction();
 496         verifyCars(readTx, car);
 497
 498         optional = readTx.read(personPath).get(5, TimeUnit.SECONDS);
 499         assertEquals("isPresent", false, optional.isPresent());
 500     }
 501
 502     @Test
 503     public void testChainedTransactionFailureWithSingleShard() throws Exception {
 504         initDatastoresWithCars("testChainedTransactionFailureWithSingleShard");
 505
 506         final ConcurrentDOMDataBroker broker = new ConcurrentDOMDataBroker(
 507                 ImmutableMap.<LogicalDatastoreType, DOMStore>builder().put(
 508                         LogicalDatastoreType.CONFIGURATION, followerDistributedDataStore).build(),
 509                         MoreExecutors.directExecutor());
 510
 511         final TransactionChainListener listener = Mockito.mock(TransactionChainListener.class);
 512         final DOMTransactionChain txChain = broker.createTransactionChain(listener);
 513
 514         final DOMDataWriteTransaction writeTx = txChain.newWriteOnlyTransaction();
 515
 516         final ContainerNode invalidData = ImmutableContainerNodeBuilder.create().withNodeIdentifier(
 517                 new YangInstanceIdentifier.NodeIdentifier(CarsModel.BASE_QNAME))
 518                     .withChild(ImmutableNodes.leafNode(TestModel.JUNK_QNAME, "junk")).build();
 519
 520         writeTx.merge(LogicalDatastoreType.CONFIGURATION, CarsModel.BASE_PATH, invalidData);
 521
 522         try {
 523             writeTx.submit().checkedGet(5, TimeUnit.SECONDS);
 524             fail("Expected TransactionCommitFailedException");
 525         } catch (final TransactionCommitFailedException e) {
 526             // Expected
 527         }
 528
 529         verify(listener, timeout(5000)).onTransactionChainFailed(eq(txChain), eq(writeTx), any(Throwable.class));
 530
 531         txChain.close();
 532         broker.close();
 533     }
 534
 535     @Test
 536     public void testChainedTransactionFailureWithMultipleShards() throws Exception {
 537         initDatastoresWithCarsAndPeople("testChainedTransactionFailureWithMultipleShards");
 538
 539         final ConcurrentDOMDataBroker broker = new ConcurrentDOMDataBroker(
 540                 ImmutableMap.<LogicalDatastoreType, DOMStore>builder().put(
 541                         LogicalDatastoreType.CONFIGURATION, followerDistributedDataStore).build(),
 542                         MoreExecutors.directExecutor());
 543
 544         final TransactionChainListener listener = Mockito.mock(TransactionChainListener.class);
 545         final DOMTransactionChain txChain = broker.createTransactionChain(listener);
 546
 547         final DOMDataWriteTransaction writeTx = txChain.newWriteOnlyTransaction();
 548
 549         writeTx.put(LogicalDatastoreType.CONFIGURATION, PeopleModel.BASE_PATH, PeopleModel.emptyContainer());
 550
 551         final ContainerNode invalidData = ImmutableContainerNodeBuilder.create().withNodeIdentifier(
 552                 new YangInstanceIdentifier.NodeIdentifier(CarsModel.BASE_QNAME))
 553                     .withChild(ImmutableNodes.leafNode(TestModel.JUNK_QNAME, "junk")).build();
 554
 555         // Note that merge will validate the data and fail but put succeeds b/c deep validation is not
 556         // done for put for performance reasons.
 557         writeTx.merge(LogicalDatastoreType.CONFIGURATION, CarsModel.BASE_PATH, invalidData);
 558
 559         try {
 560             writeTx.submit().checkedGet(5, TimeUnit.SECONDS);
 561             fail("Expected TransactionCommitFailedException");
 562         } catch (final TransactionCommitFailedException e) {
 563             // Expected
 564         }
 565
 566         verify(listener, timeout(5000)).onTransactionChainFailed(eq(txChain), eq(writeTx), any(Throwable.class));
 567
 568         txChain.close();
 569         broker.close();
 570     }
 571
 572     @Test
 573     public void testSingleShardTransactionsWithLeaderChanges() throws Exception {
 574         final String testName = "testSingleShardTransactionsWithLeaderChanges";
 575         initDatastoresWithCars(testName);
 576
 577         final String followerCarShardName = "member-2-shard-cars-" + testName;
 578         InMemoryJournal.addWriteMessagesCompleteLatch(followerCarShardName, 1, ApplyJournalEntries.class);
 579
 580         // Write top-level car container from the follower so it uses a remote Tx.
 581
 582         DOMStoreWriteTransaction writeTx = followerDistributedDataStore.newWriteOnlyTransaction();
 583
 584         writeTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 585         writeTx.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());
 586
 587         followerTestKit.doCommit(writeTx.ready());
 588
 589         InMemoryJournal.waitForWriteMessagesComplete(followerCarShardName);
 590
 591         // Switch the leader to the follower
 592
 593         sendDatastoreContextUpdate(followerDistributedDataStore, followerDatastoreContextBuilder
 594                 .shardElectionTimeoutFactor(1).customRaftPolicyImplementation(null));
 595
 596         JavaTestKit.shutdownActorSystem(leaderSystem, null, true);
 597         Cluster.get(followerSystem).leave(MEMBER_1_ADDRESS);
 598
 599         followerTestKit.waitUntilNoLeader(followerDistributedDataStore.getActorContext(), CARS);
 600
 601         leaderSystem = ActorSystem.create("cluster-test", ConfigFactory.load().getConfig("Member1"));
 602         Cluster.get(leaderSystem).join(MEMBER_2_ADDRESS);
 603
 604         final DatastoreContext.Builder newMember1Builder = DatastoreContext.newBuilder()
 605                 .shardHeartbeatIntervalInMillis(100).shardElectionTimeoutFactor(5);
 606         IntegrationTestKit newMember1TestKit = new IntegrationTestKit(leaderSystem, newMember1Builder, commitTimeout);
 607
 608         try (AbstractDataStore ds =
 609                 newMember1TestKit.setupAbstractDataStore(
 610                         testParameter, testName, MODULE_SHARDS_CARS_ONLY_1_2, false, CARS)) {
 611
 612             followerTestKit.waitUntilLeader(followerDistributedDataStore.getActorContext(), CARS);
 613
 614             // Write a car entry to the new leader - should switch to local Tx
 615
 616             writeTx = followerDistributedDataStore.newWriteOnlyTransaction();
 617
 618             MapEntryNode car1 = CarsModel.newCarEntry("optima", BigInteger.valueOf(20000));
 619             YangInstanceIdentifier car1Path = CarsModel.newCarPath("optima");
 620             writeTx.merge(car1Path, car1);
 621
 622             followerTestKit.doCommit(writeTx.ready());
 623
 624             verifyCars(followerDistributedDataStore.newReadOnlyTransaction(), car1);
 625         }
 626     }
 627
 628     @SuppressWarnings("unchecked")
 629     @Test
 630     public void testReadyLocalTransactionForwardedToLeader() throws Exception {
 631         initDatastoresWithCars("testReadyLocalTransactionForwardedToLeader");
 632         followerTestKit.waitUntilLeader(followerDistributedDataStore.getActorContext(), "cars");
 633
 634         final Optional<ActorRef> carsFollowerShard = followerDistributedDataStore.getActorContext()
 635                 .findLocalShard("cars");
 636         assertEquals("Cars follower shard found", true, carsFollowerShard.isPresent());
 637
 638         final TipProducingDataTree dataTree = InMemoryDataTreeFactory.getInstance().create(TreeType.OPERATIONAL);
 639         dataTree.setSchemaContext(SchemaContextHelper.full());
 640
 641         // Send a tx with immediate commit.
 642
 643         DataTreeModification modification = dataTree.takeSnapshot().newModification();
 644         new WriteModification(CarsModel.BASE_PATH, CarsModel.emptyContainer()).apply(modification);
 645         new MergeModification(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode()).apply(modification);
 646
 647         final MapEntryNode car1 = CarsModel.newCarEntry("optima", BigInteger.valueOf(20000));
 648         new WriteModification(CarsModel.newCarPath("optima"), car1).apply(modification);
 649         modification.ready();
 650
 651         ReadyLocalTransaction readyLocal = new ReadyLocalTransaction(tx1 , modification, true);
 652
 653         carsFollowerShard.get().tell(readyLocal, followerTestKit.getRef());
 654         Object resp = followerTestKit.expectMsgClass(Object.class);
 655         if (resp instanceof akka.actor.Status.Failure) {
 656             throw new AssertionError("Unexpected failure response", ((akka.actor.Status.Failure)resp).cause());
 657         }
 658
 659         assertEquals("Response type", CommitTransactionReply.class, resp.getClass());
 660
 661         verifyCars(leaderDistributedDataStore.newReadOnlyTransaction(), car1);
 662
 663         // Send another tx without immediate commit.
 664
 665         modification = dataTree.takeSnapshot().newModification();
 666         MapEntryNode car2 = CarsModel.newCarEntry("sportage", BigInteger.valueOf(30000));
 667         new WriteModification(CarsModel.newCarPath("sportage"), car2).apply(modification);
 668         modification.ready();
 669
 670         readyLocal = new ReadyLocalTransaction(tx2 , modification, false);
 671
 672         carsFollowerShard.get().tell(readyLocal, followerTestKit.getRef());
 673         resp = followerTestKit.expectMsgClass(Object.class);
 674         if (resp instanceof akka.actor.Status.Failure) {
 675             throw new AssertionError("Unexpected failure response", ((akka.actor.Status.Failure)resp).cause());
 676         }
 677
 678         assertEquals("Response type", ReadyTransactionReply.class, resp.getClass());
 679
 680         final ActorSelection txActor = leaderDistributedDataStore.getActorContext().actorSelection(
 681                 ((ReadyTransactionReply)resp).getCohortPath());
 682
 683         final Supplier<Short> versionSupplier = Mockito.mock(Supplier.class);
 684         Mockito.doReturn(DataStoreVersions.CURRENT_VERSION).when(versionSupplier).get();
 685         ThreePhaseCommitCohortProxy cohort = new ThreePhaseCommitCohortProxy(
 686                 leaderDistributedDataStore.getActorContext(), Arrays.asList(
 687                         new ThreePhaseCommitCohortProxy.CohortInfo(Futures.successful(txActor), versionSupplier)), tx2);
 688         cohort.canCommit().get(5, TimeUnit.SECONDS);
 689         cohort.preCommit().get(5, TimeUnit.SECONDS);
 690         cohort.commit().get(5, TimeUnit.SECONDS);
 691
 692         verifyCars(leaderDistributedDataStore.newReadOnlyTransaction(), car1, car2);
 693     }
 694
 695     @SuppressWarnings("unchecked")
 696     @Test
 697     public void testForwardedReadyTransactionForwardedToLeader() throws Exception {
 698         initDatastoresWithCars("testForwardedReadyTransactionForwardedToLeader");
 699         followerTestKit.waitUntilLeader(followerDistributedDataStore.getActorContext(), "cars");
 700
 701         final Optional<ActorRef> carsFollowerShard = followerDistributedDataStore.getActorContext()
 702                 .findLocalShard("cars");
 703         assertEquals("Cars follower shard found", true, carsFollowerShard.isPresent());
 704
 705         carsFollowerShard.get().tell(GetShardDataTree.INSTANCE, followerTestKit.getRef());
 706         final DataTree dataTree = followerTestKit.expectMsgClass(DataTree.class);
 707
 708         // Send a tx with immediate commit.
 709
 710         DataTreeModification modification = dataTree.takeSnapshot().newModification();
 711         new WriteModification(CarsModel.BASE_PATH, CarsModel.emptyContainer()).apply(modification);
 712         new MergeModification(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode()).apply(modification);
 713
 714         final MapEntryNode car1 = CarsModel.newCarEntry("optima", BigInteger.valueOf(20000));
 715         new WriteModification(CarsModel.newCarPath("optima"), car1).apply(modification);
 716
 717         ForwardedReadyTransaction forwardedReady = new ForwardedReadyTransaction(tx1,
 718                 DataStoreVersions.CURRENT_VERSION, new ReadWriteShardDataTreeTransaction(
 719                         Mockito.mock(ShardDataTreeTransactionParent.class), tx1, modification), true);
 720
 721         carsFollowerShard.get().tell(forwardedReady, followerTestKit.getRef());
 722         Object resp = followerTestKit.expectMsgClass(Object.class);
 723         if (resp instanceof akka.actor.Status.Failure) {
 724             throw new AssertionError("Unexpected failure response", ((akka.actor.Status.Failure)resp).cause());
 725         }
 726
 727         assertEquals("Response type", CommitTransactionReply.class, resp.getClass());
 728
 729         verifyCars(leaderDistributedDataStore.newReadOnlyTransaction(), car1);
 730
 731         // Send another tx without immediate commit.
 732
 733         modification = dataTree.takeSnapshot().newModification();
 734         MapEntryNode car2 = CarsModel.newCarEntry("sportage", BigInteger.valueOf(30000));
 735         new WriteModification(CarsModel.newCarPath("sportage"), car2).apply(modification);
 736
 737         forwardedReady = new ForwardedReadyTransaction(tx2,
 738                 DataStoreVersions.CURRENT_VERSION, new ReadWriteShardDataTreeTransaction(
 739                         Mockito.mock(ShardDataTreeTransactionParent.class), tx2, modification), false);
 740
 741         carsFollowerShard.get().tell(forwardedReady, followerTestKit.getRef());
 742         resp = followerTestKit.expectMsgClass(Object.class);
 743         if (resp instanceof akka.actor.Status.Failure) {
 744             throw new AssertionError("Unexpected failure response", ((akka.actor.Status.Failure)resp).cause());
 745         }
 746
 747         assertEquals("Response type", ReadyTransactionReply.class, resp.getClass());
 748
 749         ActorSelection txActor = leaderDistributedDataStore.getActorContext().actorSelection(
 750                 ((ReadyTransactionReply)resp).getCohortPath());
 751
 752         final Supplier<Short> versionSupplier = Mockito.mock(Supplier.class);
 753         Mockito.doReturn(DataStoreVersions.CURRENT_VERSION).when(versionSupplier).get();
 754         final ThreePhaseCommitCohortProxy cohort = new ThreePhaseCommitCohortProxy(
 755                 leaderDistributedDataStore.getActorContext(), Arrays.asList(
 756                         new ThreePhaseCommitCohortProxy.CohortInfo(Futures.successful(txActor), versionSupplier)), tx2);
 757         cohort.canCommit().get(5, TimeUnit.SECONDS);
 758         cohort.preCommit().get(5, TimeUnit.SECONDS);
 759         cohort.commit().get(5, TimeUnit.SECONDS);
 760
 761         verifyCars(leaderDistributedDataStore.newReadOnlyTransaction(), car1, car2);
 762     }
 763
 764     @Test
 765     public void testTransactionForwardedToLeaderAfterRetry() throws Exception {
 766         //TODO remove when test passes also for ClientBackedDataStore
 767         Assume.assumeTrue(testParameter.equals(DistributedDataStore.class));
 768         followerDatastoreContextBuilder.shardBatchedModificationCount(2);
 769         leaderDatastoreContextBuilder.shardBatchedModificationCount(2);
 770         initDatastoresWithCarsAndPeople("testTransactionForwardedToLeaderAfterRetry");
 771
 772         // Do an initial write to get the primary shard info cached.
 773
 774         final DOMStoreWriteTransaction initialWriteTx = followerDistributedDataStore.newWriteOnlyTransaction();
 775         initialWriteTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 776         initialWriteTx.write(PeopleModel.BASE_PATH, PeopleModel.emptyContainer());
 777         followerTestKit.doCommit(initialWriteTx.ready());
 778
 779         // Wait for the commit to be replicated to the follower.
 780
 781         MemberNode.verifyRaftState(followerDistributedDataStore, "cars",
 782             raftState -> assertEquals("getLastApplied", 0, raftState.getLastApplied()));
 783
 784         MemberNode.verifyRaftState(followerDistributedDataStore, "people",
 785             raftState -> assertEquals("getLastApplied", 0, raftState.getLastApplied()));
 786
 787         // Prepare, ready and canCommit a WO tx that writes to 2 shards. This will become the current tx in
 788         // the leader shard.
 789
 790         final DOMStoreWriteTransaction writeTx1 = followerDistributedDataStore.newWriteOnlyTransaction();
 791         writeTx1.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());
 792         writeTx1.write(PeopleModel.BASE_PATH, PeopleModel.emptyContainer());
 793         final DOMStoreThreePhaseCommitCohort writeTx1Cohort = writeTx1.ready();
 794         final ListenableFuture<Boolean> writeTx1CanCommit = writeTx1Cohort.canCommit();
 795         writeTx1CanCommit.get(5, TimeUnit.SECONDS);
 796
 797         // Prepare and ready another WO tx that writes to 2 shards but don't canCommit yet. This will be queued
 798         // in the leader shard.
 799
 800         final DOMStoreWriteTransaction writeTx2 = followerDistributedDataStore.newWriteOnlyTransaction();
 801         final LinkedList<MapEntryNode> cars = new LinkedList<>();
 802         int carIndex = 1;
 803         cars.add(CarsModel.newCarEntry("car" + carIndex, BigInteger.valueOf(carIndex)));
 804         writeTx2.write(CarsModel.newCarPath("car" + carIndex), cars.getLast());
 805         carIndex++;
 806         NormalizedNode<?, ?> people = PeopleModel.newPersonMapNode();
 807         writeTx2.write(PeopleModel.PERSON_LIST_PATH, people);
 808         final DOMStoreThreePhaseCommitCohort writeTx2Cohort = writeTx2.ready();
 809
 810         // Prepare another WO that writes to a single shard and thus will be directly committed on ready. This
 811         // tx writes 5 cars so 2 BatchedModidifications messages will be sent initially and cached in the
 812         // leader shard (with shardBatchedModificationCount set to 2). The 3rd BatchedModidifications will be
 813         // sent on ready.
 814
 815         final DOMStoreWriteTransaction writeTx3 = followerDistributedDataStore.newWriteOnlyTransaction();
 816         for (int i = 1; i <= 5; i++, carIndex++) {
 817             cars.add(CarsModel.newCarEntry("car" + carIndex, BigInteger.valueOf(carIndex)));
 818             writeTx3.write(CarsModel.newCarPath("car" + carIndex), cars.getLast());
 819         }
 820
 821         // Prepare another WO that writes to a single shard. This will send a single BatchedModidifications
 822         // message on ready.
 823
 824         final DOMStoreWriteTransaction writeTx4 = followerDistributedDataStore.newWriteOnlyTransaction();
 825         cars.add(CarsModel.newCarEntry("car" + carIndex, BigInteger.valueOf(carIndex)));
 826         writeTx4.write(CarsModel.newCarPath("car" + carIndex), cars.getLast());
 827         carIndex++;
 828
 829         // Prepare a RW tx that will create a tx actor and send a ForwardedReadyTransaciton message to the
 830         // leader shard on ready.
 831
 832         final DOMStoreReadWriteTransaction readWriteTx = followerDistributedDataStore.newReadWriteTransaction();
 833         cars.add(CarsModel.newCarEntry("car" + carIndex, BigInteger.valueOf(carIndex)));
 834         readWriteTx.write(CarsModel.newCarPath("car" + carIndex), cars.getLast());
 835
 836         IntegrationTestKit.verifyShardStats(leaderDistributedDataStore, "cars",
 837             stats -> assertEquals("getReadWriteTransactionCount", 1, stats.getReadWriteTransactionCount()));
 838
 839         // Disable elections on the leader so it switches to follower.
 840
 841         sendDatastoreContextUpdate(leaderDistributedDataStore, leaderDatastoreContextBuilder
 842                 .customRaftPolicyImplementation(DisableElectionsRaftPolicy.class.getName())
 843                 .shardElectionTimeoutFactor(10));
 844
 845         Cluster.get(followerSystem).leave(MEMBER_1_ADDRESS);
 846         leaderTestKit.waitUntilNoLeader(leaderDistributedDataStore.getActorContext(), "cars");
 847
 848         // Submit all tx's - the messages should get queued for retry.
 849
 850         final ListenableFuture<Boolean> writeTx2CanCommit = writeTx2Cohort.canCommit();
 851         final DOMStoreThreePhaseCommitCohort writeTx3Cohort = writeTx3.ready();
 852         final DOMStoreThreePhaseCommitCohort writeTx4Cohort = writeTx4.ready();
 853         final DOMStoreThreePhaseCommitCohort rwTxCohort = readWriteTx.ready();
 854
 855         // Enable elections on the other follower so it becomes the leader, at which point the
 856         // tx's should get forwarded from the previous leader to the new leader to complete the commits.
 857
 858         sendDatastoreContextUpdate(followerDistributedDataStore, followerDatastoreContextBuilder
 859                 .customRaftPolicyImplementation(null).shardElectionTimeoutFactor(1));
 860
 861         followerTestKit.doCommit(writeTx1CanCommit, writeTx1Cohort);
 862         followerTestKit.doCommit(writeTx2CanCommit, writeTx2Cohort);
 863         followerTestKit.doCommit(writeTx3Cohort);
 864         followerTestKit.doCommit(writeTx4Cohort);
 865         followerTestKit.doCommit(rwTxCohort);
 866
 867         DOMStoreReadTransaction readTx = leaderDistributedDataStore.newReadOnlyTransaction();
 868         verifyCars(readTx, cars.toArray(new MapEntryNode[cars.size()]));
 869         verifyNode(readTx, PeopleModel.PERSON_LIST_PATH, people);
 870     }
 871
 872     @Test
 873     public void testLeadershipTransferOnShutdown() throws Exception {
 874         //TODO remove when test passes also for ClientBackedDataStore
 875         Assume.assumeTrue(testParameter.equals(DistributedDataStore.class));
 876         leaderDatastoreContextBuilder.shardBatchedModificationCount(1);
 877         followerDatastoreContextBuilder.shardElectionTimeoutFactor(10).customRaftPolicyImplementation(null);
 878         final String testName = "testLeadershipTransferOnShutdown";
 879         initDatastores(testName, MODULE_SHARDS_CARS_PEOPLE_1_2_3, CARS_AND_PEOPLE);
 880
 881         final IntegrationTestKit follower2TestKit = new IntegrationTestKit(follower2System,
 882                 DatastoreContext.newBuilderFrom(followerDatastoreContextBuilder.build()).operationTimeoutInMillis(100),
 883                 commitTimeout);
 884         try (AbstractDataStore follower2DistributedDataStore = follower2TestKit.setupAbstractDataStore(
 885                 testParameter, testName, MODULE_SHARDS_CARS_PEOPLE_1_2_3, false)) {
 886
 887             // Create and submit a couple tx's so they're pending.
 888
 889             DOMStoreWriteTransaction writeTx = followerDistributedDataStore.newWriteOnlyTransaction();
 890             writeTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 891             writeTx.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());
 892             writeTx.write(PeopleModel.BASE_PATH, PeopleModel.emptyContainer());
 893             final DOMStoreThreePhaseCommitCohort cohort1 = writeTx.ready();
 894
 895             IntegrationTestKit.verifyShardStats(leaderDistributedDataStore, "cars",
 896                 stats -> assertEquals("getTxCohortCacheSize", 1, stats.getTxCohortCacheSize()));
 897
 898             writeTx = followerDistributedDataStore.newWriteOnlyTransaction();
 899             final MapEntryNode car = CarsModel.newCarEntry("optima", BigInteger.valueOf(20000));
 900             writeTx.write(CarsModel.newCarPath("optima"), car);
 901             final DOMStoreThreePhaseCommitCohort cohort2 = writeTx.ready();
 902
 903             IntegrationTestKit.verifyShardStats(leaderDistributedDataStore, "cars",
 904                 stats -> assertEquals("getTxCohortCacheSize", 2, stats.getTxCohortCacheSize()));
 905
 906             // Gracefully stop the leader via a Shutdown message.
 907
 908             sendDatastoreContextUpdate(leaderDistributedDataStore, leaderDatastoreContextBuilder
 909                 .shardElectionTimeoutFactor(100));
 910
 911             final FiniteDuration duration = FiniteDuration.create(5, TimeUnit.SECONDS);
 912             final Future<ActorRef> future = leaderDistributedDataStore.getActorContext().findLocalShardAsync("cars");
 913             final ActorRef leaderActor = Await.result(future, duration);
 914
 915             final Future<Boolean> stopFuture = Patterns.gracefulStop(leaderActor, duration, Shutdown.INSTANCE);
 916
 917             // Commit the 2 transactions. They should finish and succeed.
 918
 919             followerTestKit.doCommit(cohort1);
 920             followerTestKit.doCommit(cohort2);
 921
 922             // Wait for the leader actor stopped.
 923
 924             final Boolean stopped = Await.result(stopFuture, duration);
 925             assertEquals("Stopped", Boolean.TRUE, stopped);
 926
 927             // Verify leadership was transferred by reading the committed data from the other nodes.
 928
 929             verifyCars(followerDistributedDataStore.newReadOnlyTransaction(), car);
 930             verifyCars(follower2DistributedDataStore.newReadOnlyTransaction(), car);
 931         }
 932     }
 933
 934     @Test
 935     public void testTransactionWithIsolatedLeader() throws Exception {
 936         //TODO remove when test passes also for ClientBackedDataStore
 937         Assume.assumeTrue(testParameter.equals(DistributedDataStore.class));
 938         // Set the isolated leader check interval high so we can control the switch to IsolatedLeader.
 939         leaderDatastoreContextBuilder.shardIsolatedLeaderCheckIntervalInMillis(10000000);
 940         final String testName = "testTransactionWithIsolatedLeader";
 941         initDatastoresWithCars(testName);
 942
 943         // Tx that is submitted after the follower is stopped but before the leader transitions to IsolatedLeader.
 944         final DOMStoreWriteTransaction preIsolatedLeaderWriteTx = leaderDistributedDataStore.newWriteOnlyTransaction();
 945         preIsolatedLeaderWriteTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 946
 947         // Tx that is submitted after the leader transitions to IsolatedLeader.
 948         final DOMStoreWriteTransaction noShardLeaderWriteTx = leaderDistributedDataStore.newWriteOnlyTransaction();
 949         noShardLeaderWriteTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 950
 951         // Tx that is submitted after the follower is reinstated.
 952         final DOMStoreWriteTransaction successWriteTx = leaderDistributedDataStore.newWriteOnlyTransaction();
 953         successWriteTx.merge(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 954
 955         // Stop the follower
 956         followerTestKit.watch(followerDistributedDataStore.getActorContext().getShardManager());
 957         followerDistributedDataStore.close();
 958         followerTestKit.expectTerminated(followerDistributedDataStore.getActorContext().getShardManager());
 959
 960         // Submit the preIsolatedLeaderWriteTx so it's pending
 961         final DOMStoreThreePhaseCommitCohort preIsolatedLeaderTxCohort = preIsolatedLeaderWriteTx.ready();
 962
 963         // Change the isolated leader check interval low so it changes to IsolatedLeader.
 964         sendDatastoreContextUpdate(leaderDistributedDataStore, leaderDatastoreContextBuilder
 965                 .shardIsolatedLeaderCheckIntervalInMillis(200));
 966
 967         MemberNode.verifyRaftState(leaderDistributedDataStore, "cars",
 968             raftState -> assertEquals("getRaftState", "IsolatedLeader", raftState.getRaftState()));
 969
 970         try {
 971             leaderTestKit.doCommit(noShardLeaderWriteTx.ready());
 972             fail("Expected NoShardLeaderException");
 973         } catch (final ExecutionException e) {
 974             assertEquals("getCause", NoShardLeaderException.class, Throwables.getRootCause(e).getClass());
 975         }
 976
 977         sendDatastoreContextUpdate(leaderDistributedDataStore, leaderDatastoreContextBuilder
 978                 .shardElectionTimeoutFactor(100));
 979
 980         final DOMStoreThreePhaseCommitCohort successTxCohort = successWriteTx.ready();
 981
 982         followerDistributedDataStore = followerTestKit.setupAbstractDataStore(
 983                 testParameter, testName, MODULE_SHARDS_CARS_ONLY_1_2, false, CARS);
 984
 985         leaderTestKit.doCommit(preIsolatedLeaderTxCohort);
 986         leaderTestKit.doCommit(successTxCohort);
 987     }
 988
 989     @Test
 990     public void testTransactionWithShardLeaderNotResponding() throws Exception {
 991         followerDatastoreContextBuilder.shardElectionTimeoutFactor(50);
 992         initDatastoresWithCars("testTransactionWithShardLeaderNotResponding");
 993
 994         // Do an initial read to get the primary shard info cached.
 995
 996         final DOMStoreReadTransaction readTx = followerDistributedDataStore.newReadOnlyTransaction();
 997         readTx.read(CarsModel.BASE_PATH).checkedGet(5, TimeUnit.SECONDS);
 998
 999         // Shutdown the leader and try to create a new tx.
1000
1001         JavaTestKit.shutdownActorSystem(leaderSystem, null, true);
1002
1003         followerDatastoreContextBuilder.operationTimeoutInMillis(50).shardElectionTimeoutFactor(1);
1004         sendDatastoreContextUpdate(followerDistributedDataStore, followerDatastoreContextBuilder);
1005
1006         final DOMStoreReadWriteTransaction rwTx = followerDistributedDataStore.newReadWriteTransaction();
1007
1008         rwTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
1009
1010         try {
1011             followerTestKit.doCommit(rwTx.ready());
1012             fail("Exception expected");
1013         } catch (final ExecutionException e) {
1014             final String msg = "Unexpected exception: " + Throwables.getStackTraceAsString(e.getCause());
1015             assertTrue(msg, Throwables.getRootCause(e) instanceof NoShardLeaderException
1016                     || e.getCause() instanceof ShardLeaderNotRespondingException);
1017         }
1018     }
1019
1020     @Test
1021     public void testTransactionWithCreateTxFailureDueToNoLeader() throws Exception {
1022         initDatastoresWithCars("testTransactionWithCreateTxFailureDueToNoLeader");
1023
1024         // Do an initial read to get the primary shard info cached.
1025
1026         final DOMStoreReadTransaction readTx = followerDistributedDataStore.newReadOnlyTransaction();
1027         readTx.read(CarsModel.BASE_PATH).checkedGet(5, TimeUnit.SECONDS);
1028
1029         // Shutdown the leader and try to create a new tx.
1030
1031         JavaTestKit.shutdownActorSystem(leaderSystem, null, true);
1032
1033         Cluster.get(followerSystem).leave(MEMBER_1_ADDRESS);
1034
1035         Uninterruptibles.sleepUninterruptibly(100, TimeUnit.MILLISECONDS);
1036
1037         sendDatastoreContextUpdate(followerDistributedDataStore, followerDatastoreContextBuilder
1038                 .operationTimeoutInMillis(10).shardElectionTimeoutFactor(1).customRaftPolicyImplementation(null));
1039
1040         final DOMStoreReadWriteTransaction rwTx = followerDistributedDataStore.newReadWriteTransaction();
1041
1042         rwTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
1043
1044         try {
1045             followerTestKit.doCommit(rwTx.ready());
1046             fail("Exception expected");
1047         } catch (final ExecutionException e) {
1048             final String msg = "Expected instance of NoShardLeaderException, actual: \n"
1049                     + Throwables.getStackTraceAsString(e.getCause());
1050             assertTrue(msg, Throwables.getRootCause(e) instanceof NoShardLeaderException);
1051         }
1052     }
1053
1054     @Test
1055     public void testTransactionRetryWithInitialAskTimeoutExOnCreateTx() throws Exception {
1056         String testName = "testTransactionRetryWithInitialAskTimeoutExOnCreateTx";
1057         initDatastores(testName, MODULE_SHARDS_CARS_PEOPLE_1_2_3, CARS);
1058
1059         final DatastoreContext.Builder follower2DatastoreContextBuilder = DatastoreContext.newBuilder()
1060                 .shardHeartbeatIntervalInMillis(100).shardElectionTimeoutFactor(5);
1061         final IntegrationTestKit follower2TestKit = new IntegrationTestKit(
1062                 follower2System, follower2DatastoreContextBuilder, commitTimeout);
1063
1064         try (AbstractDataStore ds =
1065                 follower2TestKit.setupAbstractDataStore(
1066                         testParameter, testName, MODULE_SHARDS_CARS_PEOPLE_1_2_3, false, CARS)) {
1067
1068             followerTestKit.waitForMembersUp("member-1", "member-3");
1069             follower2TestKit.waitForMembersUp("member-1", "member-2");
1070
1071             // Do an initial read to get the primary shard info cached.
1072
1073             final DOMStoreReadTransaction readTx = followerDistributedDataStore.newReadOnlyTransaction();
1074             readTx.read(CarsModel.BASE_PATH).checkedGet(5, TimeUnit.SECONDS);
1075
1076             // Shutdown the leader and try to create a new tx.
1077
1078             JavaTestKit.shutdownActorSystem(leaderSystem, null, true);
1079
1080             Cluster.get(followerSystem).leave(MEMBER_1_ADDRESS);
1081
1082             sendDatastoreContextUpdate(followerDistributedDataStore, followerDatastoreContextBuilder
1083                 .operationTimeoutInMillis(500).shardElectionTimeoutFactor(1).customRaftPolicyImplementation(null));
1084
1085             final DOMStoreReadWriteTransaction rwTx = followerDistributedDataStore.newReadWriteTransaction();
1086
1087             rwTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
1088
1089             followerTestKit.doCommit(rwTx.ready());
1090         }
1091     }
1092
1093     @Test
1094     public void testInstallSnapshot() throws Exception {
1095         final String testName = "testInstallSnapshot";
1096         final String leaderCarShardName = "member-1-shard-cars-" + testName;
1097         final String followerCarShardName = "member-2-shard-cars-" + testName;
1098
1099         // Setup a saved snapshot on the leader. The follower will startup with no data and the leader should
1100         // install a snapshot to sync the follower.
1101
1102         TipProducingDataTree tree = InMemoryDataTreeFactory.getInstance().create(TreeType.CONFIGURATION);
1103         tree.setSchemaContext(SchemaContextHelper.full());
1104
1105         final ContainerNode carsNode = CarsModel.newCarsNode(
1106                 CarsModel.newCarsMapNode(CarsModel.newCarEntry("optima", BigInteger.valueOf(20000))));
1107         AbstractShardTest.writeToStore(tree, CarsModel.BASE_PATH, carsNode);
1108
1109         final NormalizedNode<?, ?> snapshotRoot = AbstractShardTest.readStore(tree, YangInstanceIdentifier.EMPTY);
1110         final Snapshot initialSnapshot = Snapshot.create(
1111                 new ShardSnapshotState(new MetadataShardDataTreeSnapshot(snapshotRoot)),
1112                 Collections.emptyList(), 5, 1, 5, 1, 1, null, null);
1113         InMemorySnapshotStore.addSnapshot(leaderCarShardName, initialSnapshot);
1114
1115         InMemorySnapshotStore.addSnapshotSavedLatch(leaderCarShardName);
1116         InMemorySnapshotStore.addSnapshotSavedLatch(followerCarShardName);
1117
1118         initDatastoresWithCars(testName);
1119
1120         final Optional<NormalizedNode<?, ?>> readOptional = leaderDistributedDataStore.newReadOnlyTransaction().read(
1121                 CarsModel.BASE_PATH).checkedGet(5, TimeUnit.SECONDS);
1122         assertEquals("isPresent", true, readOptional.isPresent());
1123         assertEquals("Node", carsNode, readOptional.get());
1124
1125         verifySnapshot(InMemorySnapshotStore.waitForSavedSnapshot(leaderCarShardName, Snapshot.class),
1126                 initialSnapshot, snapshotRoot);
1127
1128         verifySnapshot(InMemorySnapshotStore.waitForSavedSnapshot(followerCarShardName, Snapshot.class),
1129                 initialSnapshot, snapshotRoot);
1130     }
1131
1132     private static void verifySnapshot(final Snapshot actual, final Snapshot expected,
1133                                        final NormalizedNode<?, ?> expRoot) {
1134         assertEquals("Snapshot getLastAppliedTerm", expected.getLastAppliedTerm(), actual.getLastAppliedTerm());
1135         assertEquals("Snapshot getLastAppliedIndex", expected.getLastAppliedIndex(), actual.getLastAppliedIndex());
1136         assertEquals("Snapshot getLastTerm", expected.getLastTerm(), actual.getLastTerm());
1137         assertEquals("Snapshot getLastIndex", expected.getLastIndex(), actual.getLastIndex());
1138         assertEquals("Snapshot state type", ShardSnapshotState.class, actual.getState().getClass());
1139         MetadataShardDataTreeSnapshot shardSnapshot =
1140                 (MetadataShardDataTreeSnapshot) ((ShardSnapshotState)actual.getState()).getSnapshot();
1141         assertEquals("Snapshot root node", expRoot, shardSnapshot.getRootNode().get());
1142     }
1143
1144     private static void sendDatastoreContextUpdate(final AbstractDataStore dataStore, final Builder builder) {
1145         final Builder newBuilder = DatastoreContext.newBuilderFrom(builder.build());
1146         final DatastoreContextFactory mockContextFactory = Mockito.mock(DatastoreContextFactory.class);
1147         final Answer<DatastoreContext> answer = invocation -> newBuilder.build();
1148         Mockito.doAnswer(answer).when(mockContextFactory).getBaseDatastoreContext();
1149         Mockito.doAnswer(answer).when(mockContextFactory).getShardDatastoreContext(Mockito.anyString());
1150         dataStore.onDatastoreContextUpdated(mockContextFactory);
1151     }
1152 }