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

   1 /*
   2  * Copyright (c) 2015 Brocade Communications Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.cluster.datastore;
   9
  10 import static org.junit.Assert.assertEquals;
  11 import static org.junit.Assert.assertNotNull;
  12 import static org.junit.Assert.assertTrue;
  13 import static org.junit.Assert.fail;
  14 import static org.mockito.Matchers.any;
  15 import static org.mockito.Matchers.eq;
  16 import static org.mockito.Mockito.timeout;
  17 import static org.mockito.Mockito.verify;
  18 import akka.actor.ActorRef;
  19 import akka.actor.ActorSelection;
  20 import akka.actor.ActorSystem;
  21 import akka.actor.Address;
  22 import akka.actor.AddressFromURIString;
  23 import akka.cluster.Cluster;
  24 import akka.dispatch.Futures;
  25 import akka.pattern.AskTimeoutException;
  26 import akka.pattern.Patterns;
  27 import akka.testkit.JavaTestKit;
  28 import com.google.common.base.Optional;
  29 import com.google.common.base.Supplier;
  30 import com.google.common.collect.ImmutableMap;
  31 import com.google.common.util.concurrent.ListenableFuture;
  32 import com.google.common.util.concurrent.MoreExecutors;
  33 import com.google.common.util.concurrent.Uninterruptibles;
  34 import com.typesafe.config.ConfigFactory;
  35 import java.math.BigInteger;
  36 import java.util.Arrays;
  37 import java.util.LinkedList;
  38 import java.util.concurrent.ExecutionException;
  39 import java.util.concurrent.TimeUnit;
  40 import org.junit.After;
  41 import org.junit.Before;
  42 import org.junit.Test;
  43 import org.mockito.Mockito;
  44 import org.mockito.invocation.InvocationOnMock;
  45 import org.mockito.stubbing.Answer;
  46 import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
  47 import org.opendaylight.controller.cluster.databroker.ConcurrentDOMDataBroker;
  48 import org.opendaylight.controller.cluster.datastore.DatastoreContext.Builder;
  49 import org.opendaylight.controller.cluster.datastore.IntegrationTestKit.ShardStatsVerifier;
  50 import org.opendaylight.controller.cluster.datastore.MemberNode.RaftStateVerifier;
  51 import org.opendaylight.controller.cluster.datastore.exceptions.NoShardLeaderException;
  52 import org.opendaylight.controller.cluster.datastore.exceptions.ShardLeaderNotRespondingException;
  53 import org.opendaylight.controller.cluster.datastore.jmx.mbeans.shard.ShardStats;
  54 import org.opendaylight.controller.cluster.datastore.messages.CommitTransactionReply;
  55 import org.opendaylight.controller.cluster.datastore.messages.ForwardedReadyTransaction;
  56 import org.opendaylight.controller.cluster.datastore.messages.GetShardDataTree;
  57 import org.opendaylight.controller.cluster.datastore.messages.ReadyLocalTransaction;
  58 import org.opendaylight.controller.cluster.datastore.messages.ReadyTransactionReply;
  59 import org.opendaylight.controller.cluster.datastore.modification.MergeModification;
  60 import org.opendaylight.controller.cluster.datastore.modification.WriteModification;
  61 import org.opendaylight.controller.cluster.raft.client.messages.OnDemandRaftState;
  62 import org.opendaylight.controller.cluster.raft.client.messages.Shutdown;
  63 import org.opendaylight.controller.cluster.raft.persisted.ApplyJournalEntries;
  64 import org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy;
  65 import org.opendaylight.controller.cluster.raft.utils.InMemoryJournal;
  66 import org.opendaylight.controller.md.cluster.datastore.model.CarsModel;
  67 import org.opendaylight.controller.md.cluster.datastore.model.PeopleModel;
  68 import org.opendaylight.controller.md.cluster.datastore.model.SchemaContextHelper;
  69 import org.opendaylight.controller.md.cluster.datastore.model.TestModel;
  70 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  71 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
  72 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
  73 import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
  74 import org.opendaylight.controller.md.sal.dom.api.DOMTransactionChain;
  75 import org.opendaylight.controller.sal.core.spi.data.DOMStore;
  76 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
  77 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
  78 import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
  79 import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionChain;
  80 import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
  81 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  82 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  83 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  84 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
  85 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  86 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
  87 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
  88 import org.opendaylight.yangtools.yang.data.api.schema.tree.TipProducingDataTree;
  89 import org.opendaylight.yangtools.yang.data.api.schema.tree.TreeType;
  90 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
  91 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.CollectionNodeBuilder;
  92 import org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableContainerNodeBuilder;
  93 import org.opendaylight.yangtools.yang.data.impl.schema.tree.InMemoryDataTreeFactory;
  94 import scala.concurrent.Await;
  95 import scala.concurrent.Future;
  96 import scala.concurrent.duration.FiniteDuration;
  97
  98 /**
  99  * End-to-end distributed data store tests that exercise remote shards and transactions.
 100  *
 101  * @author Thomas Pantelis
 102  */
 103 public class DistributedDataStoreRemotingIntegrationTest extends AbstractTest {
 104
 105     private static final String[] CARS_AND_PEOPLE = {"cars", "people"};
 106     private static final String[] CARS = {"cars"};
 107
 108     private static final Address MEMBER_1_ADDRESS = AddressFromURIString.parse("akka.tcp://cluster-test@127.0.0.1:2558");
 109     private static final Address MEMBER_2_ADDRESS = AddressFromURIString.parse("akka.tcp://cluster-test@127.0.0.1:2559");
 110
 111     private static final String MODULE_SHARDS_CARS_ONLY_1_2 = "module-shards-cars-member-1-and-2.conf";
 112     private static final String MODULE_SHARDS_CARS_PEOPLE_1_2 = "module-shards-member1-and-2.conf";
 113     private static final String MODULE_SHARDS_CARS_PEOPLE_1_2_3 = "module-shards-member1-and-2-and-3.conf";
 114
 115     private ActorSystem leaderSystem;
 116     private ActorSystem followerSystem;
 117     private ActorSystem follower2System;
 118
 119     private final DatastoreContext.Builder leaderDatastoreContextBuilder =
 120             DatastoreContext.newBuilder().shardHeartbeatIntervalInMillis(100).shardElectionTimeoutFactor(2);
 121
 122     private final DatastoreContext.Builder followerDatastoreContextBuilder =
 123             DatastoreContext.newBuilder().shardHeartbeatIntervalInMillis(100).shardElectionTimeoutFactor(5).
 124                 customRaftPolicyImplementation(DisableElectionsRaftPolicy.class.getName());
 125     private final TransactionIdentifier tx1 = nextTransactionId();
 126     private final TransactionIdentifier tx2 = nextTransactionId();
 127
 128     private DistributedDataStore followerDistributedDataStore;
 129     private DistributedDataStore leaderDistributedDataStore;
 130     private IntegrationTestKit followerTestKit;
 131     private IntegrationTestKit leaderTestKit;
 132
 133     @Before
 134     public void setUp() {
 135         leaderSystem = ActorSystem.create("cluster-test", ConfigFactory.load().getConfig("Member1"));
 136         Cluster.get(leaderSystem).join(MEMBER_1_ADDRESS);
 137
 138         followerSystem = ActorSystem.create("cluster-test", ConfigFactory.load().getConfig("Member2"));
 139         Cluster.get(followerSystem).join(MEMBER_1_ADDRESS);
 140
 141         follower2System = ActorSystem.create("cluster-test", ConfigFactory.load().getConfig("Member3"));
 142         Cluster.get(follower2System).join(MEMBER_1_ADDRESS);
 143     }
 144
 145     @After
 146     public void tearDown() {
 147         if (followerDistributedDataStore != null) {
 148             leaderDistributedDataStore.close();
 149         }
 150         if (leaderDistributedDataStore != null) {
 151             leaderDistributedDataStore.close();
 152         }
 153
 154         JavaTestKit.shutdownActorSystem(leaderSystem);
 155         JavaTestKit.shutdownActorSystem(followerSystem);
 156         JavaTestKit.shutdownActorSystem(follower2System);
 157     }
 158
 159     private void initDatastoresWithCars(String type) {
 160         initDatastores(type, MODULE_SHARDS_CARS_ONLY_1_2, CARS);
 161     }
 162
 163     private void initDatastoresWithCarsAndPeople(String type) {
 164         initDatastores(type, MODULE_SHARDS_CARS_PEOPLE_1_2, CARS_AND_PEOPLE);
 165     }
 166
 167     private void initDatastores(String type, String moduleShardsConfig, String[] shards) {
 168         leaderTestKit = new IntegrationTestKit(leaderSystem, leaderDatastoreContextBuilder);
 169
 170         leaderDistributedDataStore = leaderTestKit.setupDistributedDataStore(type, moduleShardsConfig, false, shards);
 171
 172         followerTestKit = new IntegrationTestKit(followerSystem, followerDatastoreContextBuilder);
 173         followerDistributedDataStore = followerTestKit.setupDistributedDataStore(type, moduleShardsConfig, false, shards);
 174
 175         leaderTestKit.waitUntilLeader(leaderDistributedDataStore.getActorContext(), shards);
 176     }
 177
 178     private static void verifyCars(DOMStoreReadTransaction readTx, MapEntryNode... entries) throws Exception {
 179         Optional<NormalizedNode<?, ?>> optional = readTx.read(CarsModel.CAR_LIST_PATH).get(5, TimeUnit.SECONDS);
 180         assertEquals("isPresent", true, optional.isPresent());
 181
 182         CollectionNodeBuilder<MapEntryNode, MapNode> listBuilder = ImmutableNodes.mapNodeBuilder(CarsModel.CAR_QNAME);
 183         for(NormalizedNode<?, ?> entry: entries) {
 184             listBuilder.withChild((MapEntryNode) entry);
 185         }
 186
 187         assertEquals("Car list node", listBuilder.build(), optional.get());
 188     }
 189
 190     private static void verifyNode(DOMStoreReadTransaction readTx, YangInstanceIdentifier path, NormalizedNode<?, ?> expNode)
 191             throws Exception {
 192         Optional<NormalizedNode<?, ?>> optional = readTx.read(path).get(5, TimeUnit.SECONDS);
 193         assertEquals("isPresent", true, optional.isPresent());
 194         assertEquals("Data node", expNode, optional.get());
 195     }
 196
 197     private static void verifyExists(DOMStoreReadTransaction readTx, YangInstanceIdentifier path) throws Exception {
 198         Boolean exists = readTx.exists(path).get(5, TimeUnit.SECONDS);
 199         assertEquals("exists", true, exists);
 200     }
 201
 202     @Test
 203     public void testWriteTransactionWithSingleShard() throws Exception {
 204         String testName = "testWriteTransactionWithSingleShard";
 205         initDatastoresWithCars(testName);
 206
 207         String followerCarShardName = "member-2-shard-cars-" + testName;
 208         InMemoryJournal.addWriteMessagesCompleteLatch(followerCarShardName, 2, ApplyJournalEntries.class );
 209
 210         DOMStoreWriteTransaction writeTx = followerDistributedDataStore.newWriteOnlyTransaction();
 211         assertNotNull("newWriteOnlyTransaction returned null", writeTx);
 212
 213         writeTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 214         writeTx.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());
 215
 216         MapEntryNode car1 = CarsModel.newCarEntry("optima", BigInteger.valueOf(20000));
 217         YangInstanceIdentifier car1Path = CarsModel.newCarPath("optima");
 218         writeTx.merge(car1Path, car1);
 219
 220         MapEntryNode car2 = CarsModel.newCarEntry("sportage", BigInteger.valueOf(25000));
 221         YangInstanceIdentifier car2Path = CarsModel.newCarPath("sportage");
 222         writeTx.merge(car2Path, car2);
 223
 224         followerTestKit.doCommit(writeTx.ready());
 225
 226         verifyCars(followerDistributedDataStore.newReadOnlyTransaction(), car1, car2);
 227
 228         verifyCars(leaderDistributedDataStore.newReadOnlyTransaction(), car1, car2);
 229
 230         // Test delete
 231
 232         writeTx = followerDistributedDataStore.newWriteOnlyTransaction();
 233
 234         writeTx.delete(car1Path);
 235
 236         followerTestKit.doCommit(writeTx.ready());
 237
 238         verifyExists(followerDistributedDataStore.newReadOnlyTransaction(), car2Path);
 239
 240         verifyCars(followerDistributedDataStore.newReadOnlyTransaction(), car2);
 241
 242         verifyCars(leaderDistributedDataStore.newReadOnlyTransaction(), car2);
 243
 244         // Re-instate the follower member 2 as a single-node to verify replication and recovery.
 245
 246         InMemoryJournal.waitForWriteMessagesComplete(followerCarShardName);
 247
 248         JavaTestKit.shutdownActorSystem(leaderSystem, null, true);
 249         JavaTestKit.shutdownActorSystem(followerSystem, null, true);
 250
 251         ActorSystem newSystem = ActorSystem.create("reinstated-member2", ConfigFactory.load().getConfig("Member2"));
 252
 253         try (DistributedDataStore member2Datastore = new IntegrationTestKit(newSystem, leaderDatastoreContextBuilder).
 254                 setupDistributedDataStore(testName, "module-shards-member2", true, CARS_AND_PEOPLE)) {
 255             verifyCars(member2Datastore.newReadOnlyTransaction(), car2);
 256         }
 257
 258         JavaTestKit.shutdownActorSystem(newSystem);
 259     }
 260
 261     @Test
 262     public void testReadWriteTransactionWithSingleShard() throws Exception {
 263         initDatastoresWithCars("testReadWriteTransactionWithSingleShard");
 264
 265         DOMStoreReadWriteTransaction rwTx = followerDistributedDataStore.newReadWriteTransaction();
 266         assertNotNull("newReadWriteTransaction returned null", rwTx);
 267
 268         rwTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 269         rwTx.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());
 270
 271         MapEntryNode car1 = CarsModel.newCarEntry("optima", BigInteger.valueOf(20000));
 272         rwTx.merge(CarsModel.newCarPath("optima"), car1);
 273
 274         verifyCars(rwTx, car1);
 275
 276         MapEntryNode car2 = CarsModel.newCarEntry("sportage", BigInteger.valueOf(25000));
 277         YangInstanceIdentifier car2Path = CarsModel.newCarPath("sportage");
 278         rwTx.merge(car2Path, car2);
 279
 280         verifyExists(rwTx, car2Path);
 281
 282         followerTestKit.doCommit(rwTx.ready());
 283
 284         verifyCars(followerDistributedDataStore.newReadOnlyTransaction(), car1, car2);
 285     }
 286
 287     @Test
 288     public void testWriteTransactionWithMultipleShards() throws Exception {
 289         initDatastoresWithCarsAndPeople("testWriteTransactionWithMultipleShards");
 290
 291         DOMStoreWriteTransaction writeTx = followerDistributedDataStore.newWriteOnlyTransaction();
 292         assertNotNull("newWriteOnlyTransaction returned null", writeTx);
 293
 294         YangInstanceIdentifier carsPath = CarsModel.BASE_PATH;
 295         NormalizedNode<?, ?> carsNode = CarsModel.emptyContainer();
 296         writeTx.write(carsPath, carsNode);
 297
 298         YangInstanceIdentifier peoplePath = PeopleModel.BASE_PATH;
 299         NormalizedNode<?, ?> peopleNode = PeopleModel.emptyContainer();
 300         writeTx.write(peoplePath, peopleNode);
 301
 302         followerTestKit.doCommit(writeTx.ready());
 303
 304         DOMStoreReadTransaction readTx = followerDistributedDataStore.newReadOnlyTransaction();
 305
 306         verifyNode(readTx, carsPath, carsNode);
 307         verifyNode(readTx, peoplePath, peopleNode);
 308     }
 309
 310     @Test
 311     public void testReadWriteTransactionWithMultipleShards() throws Exception {
 312         initDatastoresWithCarsAndPeople("testReadWriteTransactionWithMultipleShards");
 313
 314         DOMStoreReadWriteTransaction rwTx = followerDistributedDataStore.newReadWriteTransaction();
 315         assertNotNull("newReadWriteTransaction returned null", rwTx);
 316
 317         YangInstanceIdentifier carsPath = CarsModel.BASE_PATH;
 318         NormalizedNode<?, ?> carsNode = CarsModel.emptyContainer();
 319         rwTx.write(carsPath, carsNode);
 320
 321         YangInstanceIdentifier peoplePath = PeopleModel.BASE_PATH;
 322         NormalizedNode<?, ?> peopleNode = PeopleModel.emptyContainer();
 323         rwTx.write(peoplePath, peopleNode);
 324
 325         followerTestKit.doCommit(rwTx.ready());
 326
 327         DOMStoreReadTransaction readTx = followerDistributedDataStore.newReadOnlyTransaction();
 328
 329         verifyNode(readTx, carsPath, carsNode);
 330         verifyNode(readTx, peoplePath, peopleNode);
 331     }
 332
 333     @Test
 334     public void testTransactionChainWithSingleShard() throws Exception {
 335         initDatastoresWithCars("testTransactionChainWithSingleShard");
 336
 337         DOMStoreTransactionChain txChain = followerDistributedDataStore.createTransactionChain();
 338
 339         // Add the top-level cars container with write-only.
 340
 341         DOMStoreWriteTransaction writeTx = txChain.newWriteOnlyTransaction();
 342         assertNotNull("newWriteOnlyTransaction returned null", writeTx);
 343
 344         writeTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 345
 346         writeTx.ready();
 347
 348         // Verify the top-level cars container with read-only.
 349
 350         verifyNode(txChain.newReadOnlyTransaction(), CarsModel.BASE_PATH, CarsModel.emptyContainer());
 351
 352         // Perform car operations with read-write.
 353
 354         DOMStoreReadWriteTransaction rwTx = txChain.newReadWriteTransaction();
 355
 356         verifyNode(rwTx, CarsModel.BASE_PATH, CarsModel.emptyContainer());
 357
 358         rwTx.merge(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());
 359
 360         MapEntryNode car1 = CarsModel.newCarEntry("optima", BigInteger.valueOf(20000));
 361         YangInstanceIdentifier car1Path = CarsModel.newCarPath("optima");
 362         rwTx.write(car1Path, car1);
 363
 364         verifyExists(rwTx, car1Path);
 365
 366         verifyCars(rwTx, car1);
 367
 368         MapEntryNode car2 = CarsModel.newCarEntry("sportage", BigInteger.valueOf(25000));
 369         rwTx.merge(CarsModel.newCarPath("sportage"), car2);
 370
 371         rwTx.delete(car1Path);
 372
 373         followerTestKit.doCommit(rwTx.ready());
 374
 375         txChain.close();
 376
 377         verifyCars(followerDistributedDataStore.newReadOnlyTransaction(), car2);
 378     }
 379
 380     @Test
 381     public void testTransactionChainWithMultipleShards() throws Exception{
 382         initDatastoresWithCarsAndPeople("testTransactionChainWithMultipleShards");
 383
 384         DOMStoreTransactionChain txChain = followerDistributedDataStore.createTransactionChain();
 385
 386         DOMStoreWriteTransaction writeTx = txChain.newWriteOnlyTransaction();
 387         assertNotNull("newWriteOnlyTransaction returned null", writeTx);
 388
 389         writeTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 390         writeTx.write(PeopleModel.BASE_PATH, PeopleModel.emptyContainer());
 391
 392         writeTx.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());
 393         writeTx.write(PeopleModel.PERSON_LIST_PATH, PeopleModel.newPersonMapNode());
 394
 395         followerTestKit.doCommit(writeTx.ready());
 396
 397         DOMStoreReadWriteTransaction readWriteTx = txChain.newReadWriteTransaction();
 398
 399         MapEntryNode car = CarsModel.newCarEntry("optima", BigInteger.valueOf(20000));
 400         YangInstanceIdentifier carPath = CarsModel.newCarPath("optima");
 401         readWriteTx.write(carPath, car);
 402
 403         MapEntryNode person = PeopleModel.newPersonEntry("jack");
 404         YangInstanceIdentifier personPath = PeopleModel.newPersonPath("jack");
 405         readWriteTx.merge(personPath, person);
 406
 407         Optional<NormalizedNode<?, ?>> optional = readWriteTx.read(carPath).get(5, TimeUnit.SECONDS);
 408         assertEquals("isPresent", true, optional.isPresent());
 409         assertEquals("Data node", car, optional.get());
 410
 411         optional = readWriteTx.read(personPath).get(5, TimeUnit.SECONDS);
 412         assertEquals("isPresent", true, optional.isPresent());
 413         assertEquals("Data node", person, optional.get());
 414
 415         DOMStoreThreePhaseCommitCohort cohort2 = readWriteTx.ready();
 416
 417         writeTx = txChain.newWriteOnlyTransaction();
 418
 419         writeTx.delete(personPath);
 420
 421         DOMStoreThreePhaseCommitCohort cohort3 = writeTx.ready();
 422
 423         followerTestKit.doCommit(cohort2);
 424         followerTestKit.doCommit(cohort3);
 425
 426         txChain.close();
 427
 428         DOMStoreReadTransaction readTx = followerDistributedDataStore.newReadOnlyTransaction();
 429         verifyCars(readTx, car);
 430
 431         optional = readTx.read(personPath).get(5, TimeUnit.SECONDS);
 432         assertEquals("isPresent", false, optional.isPresent());
 433     }
 434
 435     @Test
 436     public void testChainedTransactionFailureWithSingleShard() throws Exception {
 437         initDatastoresWithCars("testChainedTransactionFailureWithSingleShard");
 438
 439         ConcurrentDOMDataBroker broker = new ConcurrentDOMDataBroker(
 440                 ImmutableMap.<LogicalDatastoreType, DOMStore>builder().put(
 441                         LogicalDatastoreType.CONFIGURATION, followerDistributedDataStore).build(),
 442                         MoreExecutors.directExecutor());
 443
 444         TransactionChainListener listener = Mockito.mock(TransactionChainListener.class);
 445         DOMTransactionChain txChain = broker.createTransactionChain(listener);
 446
 447         DOMDataWriteTransaction writeTx = txChain.newWriteOnlyTransaction();
 448
 449         ContainerNode invalidData = ImmutableContainerNodeBuilder.create().withNodeIdentifier(
 450                 new YangInstanceIdentifier.NodeIdentifier(CarsModel.BASE_QNAME)).
 451                     withChild(ImmutableNodes.leafNode(TestModel.JUNK_QNAME, "junk")).build();
 452
 453         writeTx.merge(LogicalDatastoreType.CONFIGURATION, CarsModel.BASE_PATH, invalidData);
 454
 455         try {
 456             writeTx.submit().checkedGet(5, TimeUnit.SECONDS);
 457             fail("Expected TransactionCommitFailedException");
 458         } catch (TransactionCommitFailedException e) {
 459             // Expected
 460         }
 461
 462         verify(listener, timeout(5000)).onTransactionChainFailed(eq(txChain), eq(writeTx), any(Throwable.class));
 463
 464         txChain.close();
 465         broker.close();
 466     }
 467
 468     @Test
 469     public void testChainedTransactionFailureWithMultipleShards() throws Exception {
 470         initDatastoresWithCarsAndPeople("testChainedTransactionFailureWithMultipleShards");
 471
 472         ConcurrentDOMDataBroker broker = new ConcurrentDOMDataBroker(
 473                 ImmutableMap.<LogicalDatastoreType, DOMStore>builder().put(
 474                         LogicalDatastoreType.CONFIGURATION, followerDistributedDataStore).build(),
 475                         MoreExecutors.directExecutor());
 476
 477         TransactionChainListener listener = Mockito.mock(TransactionChainListener.class);
 478         DOMTransactionChain txChain = broker.createTransactionChain(listener);
 479
 480         DOMDataWriteTransaction writeTx = txChain.newWriteOnlyTransaction();
 481
 482         writeTx.put(LogicalDatastoreType.CONFIGURATION, PeopleModel.BASE_PATH, PeopleModel.emptyContainer());
 483
 484         ContainerNode invalidData = ImmutableContainerNodeBuilder.create().withNodeIdentifier(
 485                 new YangInstanceIdentifier.NodeIdentifier(CarsModel.BASE_QNAME)).
 486                     withChild(ImmutableNodes.leafNode(TestModel.JUNK_QNAME, "junk")).build();
 487
 488         // Note that merge will validate the data and fail but put succeeds b/c deep validation is not
 489         // done for put for performance reasons.
 490         writeTx.merge(LogicalDatastoreType.CONFIGURATION, CarsModel.BASE_PATH, invalidData);
 491
 492         try {
 493             writeTx.submit().checkedGet(5, TimeUnit.SECONDS);
 494             fail("Expected TransactionCommitFailedException");
 495         } catch (TransactionCommitFailedException e) {
 496             // Expected
 497         }
 498
 499         verify(listener, timeout(5000)).onTransactionChainFailed(eq(txChain), eq(writeTx), any(Throwable.class));
 500
 501         txChain.close();
 502         broker.close();
 503     }
 504
 505     @Test
 506     public void testSingleShardTransactionsWithLeaderChanges() throws Exception {
 507         String testName = "testSingleShardTransactionsWithLeaderChanges";
 508         initDatastoresWithCars(testName);
 509
 510         String followerCarShardName = "member-2-shard-cars-" + testName;
 511         InMemoryJournal.addWriteMessagesCompleteLatch(followerCarShardName, 1, ApplyJournalEntries.class );
 512
 513         // Write top-level car container from the follower so it uses a remote Tx.
 514
 515         DOMStoreWriteTransaction writeTx = followerDistributedDataStore.newWriteOnlyTransaction();
 516
 517         writeTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 518         writeTx.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());
 519
 520         followerTestKit.doCommit(writeTx.ready());
 521
 522         InMemoryJournal.waitForWriteMessagesComplete(followerCarShardName);
 523
 524         // Switch the leader to the follower
 525
 526         sendDatastoreContextUpdate(followerDistributedDataStore, followerDatastoreContextBuilder.
 527                 shardElectionTimeoutFactor(1).customRaftPolicyImplementation(null));
 528
 529         JavaTestKit.shutdownActorSystem(leaderSystem, null, true);
 530         Cluster.get(followerSystem).leave(MEMBER_1_ADDRESS);
 531
 532         followerTestKit.waitUntilNoLeader(followerDistributedDataStore.getActorContext(), CARS);
 533
 534         leaderSystem = ActorSystem.create("cluster-test", ConfigFactory.load().getConfig("Member1"));
 535         Cluster.get(leaderSystem).join(MEMBER_2_ADDRESS);
 536
 537         DatastoreContext.Builder newMember1Builder = DatastoreContext.newBuilder().
 538                 shardHeartbeatIntervalInMillis(100).shardElectionTimeoutFactor(5);
 539         IntegrationTestKit newMember1TestKit = new IntegrationTestKit(leaderSystem, newMember1Builder);
 540
 541         try (DistributedDataStore ds =
 542                 newMember1TestKit.setupDistributedDataStore(testName, MODULE_SHARDS_CARS_ONLY_1_2, false, CARS)) {
 543
 544             followerTestKit.waitUntilLeader(followerDistributedDataStore.getActorContext(), CARS);
 545
 546             // Write a car entry to the new leader - should switch to local Tx
 547
 548             writeTx = followerDistributedDataStore.newWriteOnlyTransaction();
 549
 550             MapEntryNode car1 = CarsModel.newCarEntry("optima", BigInteger.valueOf(20000));
 551             YangInstanceIdentifier car1Path = CarsModel.newCarPath("optima");
 552             writeTx.merge(car1Path, car1);
 553
 554             followerTestKit.doCommit(writeTx.ready());
 555
 556             verifyCars(followerDistributedDataStore.newReadOnlyTransaction(), car1);
 557         }
 558     }
 559
 560     @SuppressWarnings("unchecked")
 561     @Test
 562     public void testReadyLocalTransactionForwardedToLeader() throws Exception {
 563         initDatastoresWithCars("testReadyLocalTransactionForwardedToLeader");
 564         followerTestKit.waitUntilLeader(followerDistributedDataStore.getActorContext(), "cars");
 565
 566         Optional<ActorRef> carsFollowerShard = followerDistributedDataStore.getActorContext().findLocalShard("cars");
 567         assertEquals("Cars follower shard found", true, carsFollowerShard.isPresent());
 568
 569         TipProducingDataTree dataTree = InMemoryDataTreeFactory.getInstance().create(TreeType.OPERATIONAL);
 570         dataTree.setSchemaContext(SchemaContextHelper.full());
 571
 572         // Send a tx with immediate commit.
 573
 574         DataTreeModification modification = dataTree.takeSnapshot().newModification();
 575         new WriteModification(CarsModel.BASE_PATH, CarsModel.emptyContainer()).apply(modification);
 576         new MergeModification(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode()).apply(modification);
 577
 578         MapEntryNode car1 = CarsModel.newCarEntry("optima", BigInteger.valueOf(20000));
 579         new WriteModification(CarsModel.newCarPath("optima"), car1).apply(modification);
 580         modification.ready();
 581
 582         ReadyLocalTransaction readyLocal = new ReadyLocalTransaction(tx1 , modification, true);
 583
 584         carsFollowerShard.get().tell(readyLocal, followerTestKit.getRef());
 585         Object resp = followerTestKit.expectMsgClass(Object.class);
 586         if(resp instanceof akka.actor.Status.Failure) {
 587             throw new AssertionError("Unexpected failure response", ((akka.actor.Status.Failure)resp).cause());
 588         }
 589
 590         assertEquals("Response type", CommitTransactionReply.class, resp.getClass());
 591
 592         verifyCars(leaderDistributedDataStore.newReadOnlyTransaction(), car1);
 593
 594         // Send another tx without immediate commit.
 595
 596         modification = dataTree.takeSnapshot().newModification();
 597         MapEntryNode car2 = CarsModel.newCarEntry("sportage", BigInteger.valueOf(30000));
 598         new WriteModification(CarsModel.newCarPath("sportage"), car2).apply(modification);
 599         modification.ready();
 600
 601         readyLocal = new ReadyLocalTransaction(tx2 , modification, false);
 602
 603         carsFollowerShard.get().tell(readyLocal, followerTestKit.getRef());
 604         resp = followerTestKit.expectMsgClass(Object.class);
 605         if(resp instanceof akka.actor.Status.Failure) {
 606             throw new AssertionError("Unexpected failure response", ((akka.actor.Status.Failure)resp).cause());
 607         }
 608
 609         assertEquals("Response type", ReadyTransactionReply.class, resp.getClass());
 610
 611         ActorSelection txActor = leaderDistributedDataStore.getActorContext().actorSelection(
 612                 ((ReadyTransactionReply)resp).getCohortPath());
 613
 614         Supplier<Short> versionSupplier = Mockito.mock(Supplier.class);
 615         Mockito.doReturn(DataStoreVersions.CURRENT_VERSION).when(versionSupplier).get();
 616         ThreePhaseCommitCohortProxy cohort = new ThreePhaseCommitCohortProxy(
 617                 leaderDistributedDataStore.getActorContext(), Arrays.asList(
 618                         new ThreePhaseCommitCohortProxy.CohortInfo(Futures.successful(txActor), versionSupplier)), tx2);
 619         cohort.canCommit().get(5, TimeUnit.SECONDS);
 620         cohort.preCommit().get(5, TimeUnit.SECONDS);
 621         cohort.commit().get(5, TimeUnit.SECONDS);
 622
 623         verifyCars(leaderDistributedDataStore.newReadOnlyTransaction(), car1, car2);
 624     }
 625
 626     @SuppressWarnings("unchecked")
 627     @Test
 628     public void testForwardedReadyTransactionForwardedToLeader() throws Exception {
 629         initDatastoresWithCars("testForwardedReadyTransactionForwardedToLeader");
 630         followerTestKit.waitUntilLeader(followerDistributedDataStore.getActorContext(), "cars");
 631
 632         Optional<ActorRef> carsFollowerShard = followerDistributedDataStore.getActorContext().findLocalShard("cars");
 633         assertEquals("Cars follower shard found", true, carsFollowerShard.isPresent());
 634
 635         carsFollowerShard.get().tell(GetShardDataTree.INSTANCE, followerTestKit.getRef());
 636         DataTree dataTree = followerTestKit.expectMsgClass(DataTree.class);
 637
 638         // Send a tx with immediate commit.
 639
 640         DataTreeModification modification = dataTree.takeSnapshot().newModification();
 641         new WriteModification(CarsModel.BASE_PATH, CarsModel.emptyContainer()).apply(modification);
 642         new MergeModification(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode()).apply(modification);
 643
 644         MapEntryNode car1 = CarsModel.newCarEntry("optima", BigInteger.valueOf(20000));
 645         new WriteModification(CarsModel.newCarPath("optima"), car1).apply(modification);
 646
 647         ForwardedReadyTransaction forwardedReady = new ForwardedReadyTransaction(tx1,
 648                 DataStoreVersions.CURRENT_VERSION, new ReadWriteShardDataTreeTransaction(
 649                         Mockito.mock(ShardDataTreeTransactionParent.class), tx1, modification), true);
 650
 651         carsFollowerShard.get().tell(forwardedReady, followerTestKit.getRef());
 652         Object resp = followerTestKit.expectMsgClass(Object.class);
 653         if(resp instanceof akka.actor.Status.Failure) {
 654             throw new AssertionError("Unexpected failure response", ((akka.actor.Status.Failure)resp).cause());
 655         }
 656
 657         assertEquals("Response type", CommitTransactionReply.class, resp.getClass());
 658
 659         verifyCars(leaderDistributedDataStore.newReadOnlyTransaction(), car1);
 660
 661         // Send another tx without immediate commit.
 662
 663         modification = dataTree.takeSnapshot().newModification();
 664         MapEntryNode car2 = CarsModel.newCarEntry("sportage", BigInteger.valueOf(30000));
 665         new WriteModification(CarsModel.newCarPath("sportage"), car2).apply(modification);
 666
 667         forwardedReady = new ForwardedReadyTransaction(tx2,
 668                 DataStoreVersions.CURRENT_VERSION, new ReadWriteShardDataTreeTransaction(
 669                         Mockito.mock(ShardDataTreeTransactionParent.class), tx2, modification), false);
 670
 671         carsFollowerShard.get().tell(forwardedReady, followerTestKit.getRef());
 672         resp = followerTestKit.expectMsgClass(Object.class);
 673         if(resp instanceof akka.actor.Status.Failure) {
 674             throw new AssertionError("Unexpected failure response", ((akka.actor.Status.Failure)resp).cause());
 675         }
 676
 677         assertEquals("Response type", ReadyTransactionReply.class, resp.getClass());
 678
 679         ActorSelection txActor = leaderDistributedDataStore.getActorContext().actorSelection(
 680                 ((ReadyTransactionReply)resp).getCohortPath());
 681
 682         Supplier<Short> versionSupplier = Mockito.mock(Supplier.class);
 683         Mockito.doReturn(DataStoreVersions.CURRENT_VERSION).when(versionSupplier).get();
 684         ThreePhaseCommitCohortProxy cohort = new ThreePhaseCommitCohortProxy(
 685                 leaderDistributedDataStore.getActorContext(), Arrays.asList(
 686                         new ThreePhaseCommitCohortProxy.CohortInfo(Futures.successful(txActor), versionSupplier)), tx2);
 687         cohort.canCommit().get(5, TimeUnit.SECONDS);
 688         cohort.preCommit().get(5, TimeUnit.SECONDS);
 689         cohort.commit().get(5, TimeUnit.SECONDS);
 690
 691         verifyCars(leaderDistributedDataStore.newReadOnlyTransaction(), car1, car2);
 692     }
 693
 694     @Test
 695     public void testTransactionForwardedToLeaderAfterRetry() throws Exception {
 696         followerDatastoreContextBuilder.shardBatchedModificationCount(2);
 697         leaderDatastoreContextBuilder.shardBatchedModificationCount(2);
 698         initDatastoresWithCarsAndPeople("testTransactionForwardedToLeaderAfterRetry");
 699
 700         // Do an initial write to get the primary shard info cached.
 701
 702         DOMStoreWriteTransaction initialWriteTx = followerDistributedDataStore.newWriteOnlyTransaction();
 703         initialWriteTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 704         initialWriteTx.write(PeopleModel.BASE_PATH, PeopleModel.emptyContainer());
 705         followerTestKit.doCommit(initialWriteTx.ready());
 706
 707         // Wait for the commit to be replicated to the follower.
 708
 709         MemberNode.verifyRaftState(followerDistributedDataStore, "cars", new RaftStateVerifier() {
 710             @Override
 711             public void verify(OnDemandRaftState raftState) {
 712                 assertEquals("getLastApplied", 0, raftState.getLastApplied());
 713             }
 714         });
 715
 716         MemberNode.verifyRaftState(followerDistributedDataStore, "people", new RaftStateVerifier() {
 717             @Override
 718             public void verify(OnDemandRaftState raftState) {
 719                 assertEquals("getLastApplied", 0, raftState.getLastApplied());
 720             }
 721         });
 722
 723         // Prepare, ready and canCommit a WO tx that writes to 2 shards. This will become the current tx in
 724         // the leader shard.
 725
 726         DOMStoreWriteTransaction writeTx1 = followerDistributedDataStore.newWriteOnlyTransaction();
 727         writeTx1.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());
 728         writeTx1.write(PeopleModel.BASE_PATH, PeopleModel.emptyContainer());
 729         DOMStoreThreePhaseCommitCohort writeTx1Cohort = writeTx1.ready();
 730         ListenableFuture<Boolean> writeTx1CanCommit = writeTx1Cohort.canCommit();
 731         writeTx1CanCommit.get(5, TimeUnit.SECONDS);
 732
 733         // Prepare and ready another WO tx that writes to 2 shards but don't canCommit yet. This will be queued
 734         // in the leader shard.
 735
 736         DOMStoreWriteTransaction writeTx2 = followerDistributedDataStore.newWriteOnlyTransaction();
 737         LinkedList<MapEntryNode> cars = new LinkedList<>();
 738         int carIndex = 1;
 739         cars.add(CarsModel.newCarEntry("car" + carIndex, BigInteger.valueOf(carIndex)));
 740         writeTx2.write(CarsModel.newCarPath("car" + carIndex), cars.getLast());
 741         carIndex++;
 742         NormalizedNode<?, ?> people = PeopleModel.newPersonMapNode();
 743         writeTx2.write(PeopleModel.PERSON_LIST_PATH, people);
 744         DOMStoreThreePhaseCommitCohort writeTx2Cohort = writeTx2.ready();
 745
 746         // Prepare another WO that writes to a single shard and thus will be directly committed on ready. This
 747         // tx writes 5 cars so 2 BatchedModidifications messages will be sent initially and cached in the
 748         // leader shard (with shardBatchedModificationCount set to 2). The 3rd BatchedModidifications will be
 749         // sent on ready.
 750
 751         DOMStoreWriteTransaction writeTx3 = followerDistributedDataStore.newWriteOnlyTransaction();
 752         for(int i = 1; i <= 5; i++, carIndex++) {
 753             cars.add(CarsModel.newCarEntry("car" + carIndex, BigInteger.valueOf(carIndex)));
 754             writeTx3.write(CarsModel.newCarPath("car" + carIndex), cars.getLast());
 755         }
 756
 757         // Prepare another WO that writes to a single shard. This will send a single BatchedModidifications
 758         // message on ready.
 759
 760         DOMStoreWriteTransaction writeTx4 = followerDistributedDataStore.newWriteOnlyTransaction();
 761         cars.add(CarsModel.newCarEntry("car" + carIndex, BigInteger.valueOf(carIndex)));
 762         writeTx4.write(CarsModel.newCarPath("car" + carIndex), cars.getLast());
 763         carIndex++;
 764
 765         // Prepare a RW tx that will create a tx actor and send a ForwardedReadyTransaciton message to the
 766         // leader shard on ready.
 767
 768         DOMStoreReadWriteTransaction readWriteTx = followerDistributedDataStore.newReadWriteTransaction();
 769         cars.add(CarsModel.newCarEntry("car" + carIndex, BigInteger.valueOf(carIndex)));
 770         readWriteTx.write(CarsModel.newCarPath("car" + carIndex), cars.getLast());
 771
 772         IntegrationTestKit.verifyShardStats(leaderDistributedDataStore, "cars", new ShardStatsVerifier() {
 773             @Override
 774             public void verify(ShardStats stats) {
 775                 assertEquals("getReadWriteTransactionCount", 1, stats.getReadWriteTransactionCount());
 776             }
 777         });
 778
 779         // Disable elections on the leader so it switches to follower.
 780
 781         sendDatastoreContextUpdate(leaderDistributedDataStore, leaderDatastoreContextBuilder.
 782                 customRaftPolicyImplementation(DisableElectionsRaftPolicy.class.getName()).
 783                 shardElectionTimeoutFactor(10));
 784
 785         Cluster.get(followerSystem).leave(MEMBER_1_ADDRESS);
 786         leaderTestKit.waitUntilNoLeader(leaderDistributedDataStore.getActorContext(), "cars");
 787
 788         // Submit all tx's - the messages should get queued for retry.
 789
 790         ListenableFuture<Boolean> writeTx2CanCommit = writeTx2Cohort.canCommit();
 791         DOMStoreThreePhaseCommitCohort writeTx3Cohort = writeTx3.ready();
 792         DOMStoreThreePhaseCommitCohort writeTx4Cohort = writeTx4.ready();
 793         DOMStoreThreePhaseCommitCohort rwTxCohort = readWriteTx.ready();
 794
 795         // Enable elections on the other follower so it becomes the leader, at which point the
 796         // tx's should get forwarded from the previous leader to the new leader to complete the commits.
 797
 798         sendDatastoreContextUpdate(followerDistributedDataStore, followerDatastoreContextBuilder.
 799                 customRaftPolicyImplementation(null).shardElectionTimeoutFactor(1));
 800
 801         followerTestKit.doCommit(writeTx1CanCommit, writeTx1Cohort);
 802         followerTestKit.doCommit(writeTx2CanCommit, writeTx2Cohort);
 803         followerTestKit.doCommit(writeTx3Cohort);
 804         followerTestKit.doCommit(writeTx4Cohort);
 805         followerTestKit.doCommit(rwTxCohort);
 806
 807         DOMStoreReadTransaction readTx = leaderDistributedDataStore.newReadOnlyTransaction();
 808         verifyCars(readTx, cars.toArray(new MapEntryNode[cars.size()]));
 809         verifyNode(readTx, PeopleModel.PERSON_LIST_PATH, people);
 810     }
 811
 812     @Test
 813     public void testLeadershipTransferOnShutdown() throws Exception {
 814         leaderDatastoreContextBuilder.shardBatchedModificationCount(1);
 815         followerDatastoreContextBuilder.shardElectionTimeoutFactor(10).customRaftPolicyImplementation(null);
 816         String testName = "testLeadershipTransferOnShutdown";
 817         initDatastores(testName, MODULE_SHARDS_CARS_PEOPLE_1_2_3, CARS_AND_PEOPLE);
 818
 819         IntegrationTestKit follower2TestKit = new IntegrationTestKit(follower2System, followerDatastoreContextBuilder);
 820         try (DistributedDataStore follower2DistributedDataStore = follower2TestKit.setupDistributedDataStore(testName,
 821                 MODULE_SHARDS_CARS_PEOPLE_1_2_3, false)) {
 822
 823             // Create and submit a couple tx's so they're pending.
 824
 825             DOMStoreWriteTransaction writeTx = followerDistributedDataStore.newWriteOnlyTransaction();
 826             writeTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 827             writeTx.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());
 828             writeTx.write(PeopleModel.BASE_PATH, PeopleModel.emptyContainer());
 829             DOMStoreThreePhaseCommitCohort cohort1 = writeTx.ready();
 830
 831             IntegrationTestKit.verifyShardStats(leaderDistributedDataStore, "cars", new ShardStatsVerifier() {
 832                 @Override
 833                 public void verify(ShardStats stats) {
 834                     assertEquals("getTxCohortCacheSize", 1, stats.getTxCohortCacheSize());
 835                 }
 836             });
 837
 838             writeTx = followerDistributedDataStore.newWriteOnlyTransaction();
 839             MapEntryNode car = CarsModel.newCarEntry("optima", BigInteger.valueOf(20000));
 840             writeTx.write(CarsModel.newCarPath("optima"), car);
 841             DOMStoreThreePhaseCommitCohort cohort2 = writeTx.ready();
 842
 843             IntegrationTestKit.verifyShardStats(leaderDistributedDataStore, "cars", new ShardStatsVerifier() {
 844                 @Override
 845                 public void verify(ShardStats stats) {
 846                     assertEquals("getTxCohortCacheSize", 2, stats.getTxCohortCacheSize());
 847                 }
 848             });
 849
 850             // Gracefully stop the leader via a Shutdown message.
 851
 852             sendDatastoreContextUpdate(leaderDistributedDataStore, leaderDatastoreContextBuilder.
 853                 shardElectionTimeoutFactor(100));
 854
 855             FiniteDuration duration = FiniteDuration.create(5, TimeUnit.SECONDS);
 856             Future<ActorRef> future = leaderDistributedDataStore.getActorContext().findLocalShardAsync("cars");
 857             ActorRef leaderActor = Await.result(future, duration);
 858
 859             Future<Boolean> stopFuture = Patterns.gracefulStop(leaderActor, duration, Shutdown.INSTANCE);
 860
 861             // Commit the 2 transactions. They should finish and succeed.
 862
 863             followerTestKit.doCommit(cohort1);
 864             followerTestKit.doCommit(cohort2);
 865
 866             // Wait for the leader actor stopped.
 867
 868             Boolean stopped = Await.result(stopFuture, duration);
 869             assertEquals("Stopped", Boolean.TRUE, stopped);
 870
 871             // Verify leadership was transferred by reading the committed data from the other nodes.
 872
 873             verifyCars(followerDistributedDataStore.newReadOnlyTransaction(), car);
 874             verifyCars(follower2DistributedDataStore.newReadOnlyTransaction(), car);
 875         }
 876     }
 877
 878     @Test
 879     public void testTransactionWithIsolatedLeader() throws Throwable {
 880         leaderDatastoreContextBuilder.shardIsolatedLeaderCheckIntervalInMillis(200);
 881         String testName = "testTransactionWithIsolatedLeader";
 882         initDatastoresWithCars(testName);
 883
 884         DOMStoreWriteTransaction failWriteTx = leaderDistributedDataStore.newWriteOnlyTransaction();
 885         failWriteTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 886
 887         DOMStoreWriteTransaction successWriteTx = leaderDistributedDataStore.newWriteOnlyTransaction();
 888         successWriteTx.merge(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 889
 890         followerTestKit.watch(followerDistributedDataStore.getActorContext().getShardManager());
 891         followerDistributedDataStore.close();
 892         followerTestKit.expectTerminated(followerDistributedDataStore.getActorContext().getShardManager());
 893
 894         MemberNode.verifyRaftState(leaderDistributedDataStore, "cars", new RaftStateVerifier() {
 895             @Override
 896             public void verify(OnDemandRaftState raftState) {
 897                 assertEquals("getRaftState", "IsolatedLeader", raftState.getRaftState());
 898             }
 899         });
 900
 901         try {
 902             leaderTestKit.doCommit(failWriteTx.ready());
 903             fail("Expected NoShardLeaderException");
 904         } catch (ExecutionException e) {
 905             assertEquals("getCause", NoShardLeaderException.class, e.getCause().getClass());
 906         }
 907
 908         sendDatastoreContextUpdate(leaderDistributedDataStore, leaderDatastoreContextBuilder.
 909                 shardElectionTimeoutFactor(100));
 910
 911         DOMStoreThreePhaseCommitCohort writeTxCohort = successWriteTx.ready();
 912
 913         followerDistributedDataStore = followerTestKit.setupDistributedDataStore(testName,
 914                 MODULE_SHARDS_CARS_ONLY_1_2, false, CARS);
 915
 916         leaderTestKit.doCommit(writeTxCohort);
 917     }
 918
 919     @Test(expected=AskTimeoutException.class)
 920     public void testTransactionWithShardLeaderNotResponding() throws Throwable {
 921         initDatastoresWithCars("testTransactionWithShardLeaderNotResponding");
 922
 923         // Do an initial read to get the primary shard info cached.
 924
 925         DOMStoreReadTransaction readTx = followerDistributedDataStore.newReadOnlyTransaction();
 926         readTx.read(CarsModel.BASE_PATH).checkedGet(5, TimeUnit.SECONDS);
 927
 928         // Shutdown the leader and try to create a new tx.
 929
 930         JavaTestKit.shutdownActorSystem(leaderSystem, null, true);
 931
 932         followerDatastoreContextBuilder.operationTimeoutInMillis(50).shardElectionTimeoutFactor(1);
 933         sendDatastoreContextUpdate(followerDistributedDataStore, followerDatastoreContextBuilder);
 934
 935         DOMStoreReadWriteTransaction rwTx = followerDistributedDataStore.newReadWriteTransaction();
 936
 937         rwTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 938
 939         try {
 940             followerTestKit.doCommit(rwTx.ready());
 941         } catch (ExecutionException e) {
 942             assertTrue("Expected ShardLeaderNotRespondingException cause. Actual: " + e.getCause(),
 943                     e.getCause() instanceof ShardLeaderNotRespondingException);
 944             assertNotNull("Expected a nested cause", e.getCause().getCause());
 945             throw e.getCause().getCause();
 946         }
 947     }
 948
 949     @Test(expected=NoShardLeaderException.class)
 950     public void testTransactionWithCreateTxFailureDueToNoLeader() throws Throwable {
 951         initDatastoresWithCars("testTransactionWithCreateTxFailureDueToNoLeader");
 952
 953         // Do an initial read to get the primary shard info cached.
 954
 955         DOMStoreReadTransaction readTx = followerDistributedDataStore.newReadOnlyTransaction();
 956         readTx.read(CarsModel.BASE_PATH).checkedGet(5, TimeUnit.SECONDS);
 957
 958         // Shutdown the leader and try to create a new tx.
 959
 960         JavaTestKit.shutdownActorSystem(leaderSystem, null, true);
 961
 962         Cluster.get(followerSystem).leave(MEMBER_1_ADDRESS);
 963
 964         Uninterruptibles.sleepUninterruptibly(100, TimeUnit.MILLISECONDS);
 965
 966         sendDatastoreContextUpdate(followerDistributedDataStore, followerDatastoreContextBuilder.
 967                 operationTimeoutInMillis(10).shardElectionTimeoutFactor(1).customRaftPolicyImplementation(null));
 968
 969         DOMStoreReadWriteTransaction rwTx = followerDistributedDataStore.newReadWriteTransaction();
 970
 971         rwTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
 972
 973         try {
 974             followerTestKit.doCommit(rwTx.ready());
 975         } catch (ExecutionException e) {
 976             throw e.getCause();
 977         }
 978     }
 979
 980     @Test
 981     public void testTransactionRetryWithInitialAskTimeoutExOnCreateTx() throws Exception {
 982         String testName = "testTransactionRetryWithInitialAskTimeoutExOnCreateTx";
 983         initDatastores(testName, MODULE_SHARDS_CARS_PEOPLE_1_2_3, CARS);
 984
 985         DatastoreContext.Builder follower2DatastoreContextBuilder = DatastoreContext.newBuilder().
 986                 shardHeartbeatIntervalInMillis(100).shardElectionTimeoutFactor(5);
 987         IntegrationTestKit follower2TestKit = new IntegrationTestKit(follower2System, follower2DatastoreContextBuilder);
 988
 989         try (DistributedDataStore ds =
 990                 follower2TestKit.setupDistributedDataStore(testName, MODULE_SHARDS_CARS_PEOPLE_1_2_3, false, CARS)) {
 991
 992             followerTestKit.waitForMembersUp("member-1", "member-3");
 993             follower2TestKit.waitForMembersUp("member-1", "member-2");
 994
 995             // Do an initial read to get the primary shard info cached.
 996
 997             DOMStoreReadTransaction readTx = followerDistributedDataStore.newReadOnlyTransaction();
 998             readTx.read(CarsModel.BASE_PATH).checkedGet(5, TimeUnit.SECONDS);
 999
1000             // Shutdown the leader and try to create a new tx.
1001
1002             JavaTestKit.shutdownActorSystem(leaderSystem, null, true);
1003
1004             Cluster.get(followerSystem).leave(MEMBER_1_ADDRESS);
1005
1006             sendDatastoreContextUpdate(followerDistributedDataStore, followerDatastoreContextBuilder.
1007                 operationTimeoutInMillis(500).shardElectionTimeoutFactor(1).customRaftPolicyImplementation(null));
1008
1009             DOMStoreReadWriteTransaction rwTx = followerDistributedDataStore.newReadWriteTransaction();
1010
1011             rwTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
1012
1013             followerTestKit.doCommit(rwTx.ready());
1014         }
1015     }
1016
1017     private static void sendDatastoreContextUpdate(DistributedDataStore dataStore, final Builder builder) {
1018         final Builder newBuilder = DatastoreContext.newBuilderFrom(builder.build());
1019         DatastoreContextFactory mockContextFactory = Mockito.mock(DatastoreContextFactory.class);
1020         Answer<DatastoreContext> answer = new Answer<DatastoreContext>() {
1021             @Override
1022             public DatastoreContext answer(InvocationOnMock invocation) {
1023                 return newBuilder.build();
1024             }
1025         };
1026         Mockito.doAnswer(answer).when(mockContextFactory).getBaseDatastoreContext();
1027         Mockito.doAnswer(answer).when(mockContextFactory).getShardDatastoreContext(Mockito.anyString());
1028         dataStore.onDatastoreContextUpdated(mockContextFactory);
1029     }
1030 }