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