+ Object resp = followerTestKit.expectMsgClass(Object.class);
+ if(resp instanceof akka.actor.Status.Failure) {
+ throw new AssertionError("Unexpected failure response", ((akka.actor.Status.Failure)resp).cause());
+ }
+
+ assertEquals("Response type", CommitTransactionReply.class, resp.getClass());
+
+ verifyCars(leaderDistributedDataStore.newReadOnlyTransaction(), car1);
+
+ // Send another tx without immediate commit.
+
+ modification = dataTree.takeSnapshot().newModification();
+ MapEntryNode car2 = CarsModel.newCarEntry("sportage", BigInteger.valueOf(30000));
+ new WriteModification(CarsModel.newCarPath("sportage"), car2).apply(modification);
+ modification.ready();
+
+ readyLocal = new ReadyLocalTransaction("tx-2" , modification, false);
+
+ carsFollowerShard.get().tell(readyLocal, followerTestKit.getRef());
+ resp = followerTestKit.expectMsgClass(Object.class);
+ if(resp instanceof akka.actor.Status.Failure) {
+ throw new AssertionError("Unexpected failure response", ((akka.actor.Status.Failure)resp).cause());
+ }
+
+ assertEquals("Response type", ReadyTransactionReply.class, resp.getClass());
+
+ ActorSelection txActor = leaderDistributedDataStore.getActorContext().actorSelection(
+ ((ReadyTransactionReply)resp).getCohortPath());
+
+ Supplier<Short> versionSupplier = Mockito.mock(Supplier.class);
+ Mockito.doReturn(DataStoreVersions.CURRENT_VERSION).when(versionSupplier).get();
+ ThreePhaseCommitCohortProxy cohort = new ThreePhaseCommitCohortProxy(
+ leaderDistributedDataStore.getActorContext(), Arrays.asList(
+ new ThreePhaseCommitCohortProxy.CohortInfo(Futures.successful(txActor), versionSupplier)), "tx-2");
+ cohort.canCommit().get(5, TimeUnit.SECONDS);
+ cohort.preCommit().get(5, TimeUnit.SECONDS);
+ cohort.commit().get(5, TimeUnit.SECONDS);
+
+ verifyCars(leaderDistributedDataStore.newReadOnlyTransaction(), car1, car2);
+ }
+
+ @SuppressWarnings("unchecked")
+ @Test
+ public void testForwardedReadyTransactionForwardedToLeader() throws Exception {
+ initDatastoresWithCars("testForwardedReadyTransactionForwardedToLeader");
+ followerTestKit.waitUntilLeader(followerDistributedDataStore.getActorContext(), "cars");
+
+ Optional<ActorRef> carsFollowerShard = followerDistributedDataStore.getActorContext().findLocalShard("cars");
+ assertEquals("Cars follower shard found", true, carsFollowerShard.isPresent());
+
+ carsFollowerShard.get().tell(GetShardDataTree.INSTANCE, followerTestKit.getRef());
+ DataTree dataTree = followerTestKit.expectMsgClass(DataTree.class);
+
+ // Send a tx with immediate commit.
+
+ DataTreeModification modification = dataTree.takeSnapshot().newModification();
+ new WriteModification(CarsModel.BASE_PATH, CarsModel.emptyContainer()).apply(modification);
+ new MergeModification(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode()).apply(modification);
+
+ MapEntryNode car1 = CarsModel.newCarEntry("optima", BigInteger.valueOf(20000));
+ new WriteModification(CarsModel.newCarPath("optima"), car1).apply(modification);
+
+ ForwardedReadyTransaction forwardedReady = new ForwardedReadyTransaction("tx-1",
+ DataStoreVersions.CURRENT_VERSION, new ReadWriteShardDataTreeTransaction(
+ Mockito.mock(ShardDataTreeTransactionParent.class), "tx-1", modification), true);
+
+ carsFollowerShard.get().tell(forwardedReady, followerTestKit.getRef());
+ Object resp = followerTestKit.expectMsgClass(Object.class);
+ if(resp instanceof akka.actor.Status.Failure) {
+ throw new AssertionError("Unexpected failure response", ((akka.actor.Status.Failure)resp).cause());
+ }
+
+ assertEquals("Response type", CommitTransactionReply.class, resp.getClass());
+
+ verifyCars(leaderDistributedDataStore.newReadOnlyTransaction(), car1);
+
+ // Send another tx without immediate commit.
+
+ modification = dataTree.takeSnapshot().newModification();
+ MapEntryNode car2 = CarsModel.newCarEntry("sportage", BigInteger.valueOf(30000));
+ new WriteModification(CarsModel.newCarPath("sportage"), car2).apply(modification);
+
+ forwardedReady = new ForwardedReadyTransaction("tx-2",
+ DataStoreVersions.CURRENT_VERSION, new ReadWriteShardDataTreeTransaction(
+ Mockito.mock(ShardDataTreeTransactionParent.class), "tx-2", modification), false);
+
+ carsFollowerShard.get().tell(forwardedReady, followerTestKit.getRef());
+ resp = followerTestKit.expectMsgClass(Object.class);
+ if(resp instanceof akka.actor.Status.Failure) {
+ throw new AssertionError("Unexpected failure response", ((akka.actor.Status.Failure)resp).cause());
+ }
+
+ assertEquals("Response type", ReadyTransactionReply.class, resp.getClass());
+
+ ActorSelection txActor = leaderDistributedDataStore.getActorContext().actorSelection(
+ ((ReadyTransactionReply)resp).getCohortPath());
+
+ Supplier<Short> versionSupplier = Mockito.mock(Supplier.class);
+ Mockito.doReturn(DataStoreVersions.CURRENT_VERSION).when(versionSupplier).get();
+ ThreePhaseCommitCohortProxy cohort = new ThreePhaseCommitCohortProxy(
+ leaderDistributedDataStore.getActorContext(), Arrays.asList(
+ new ThreePhaseCommitCohortProxy.CohortInfo(Futures.successful(txActor), versionSupplier)), "tx-2");
+ cohort.canCommit().get(5, TimeUnit.SECONDS);
+ cohort.preCommit().get(5, TimeUnit.SECONDS);
+ cohort.commit().get(5, TimeUnit.SECONDS);
+
+ verifyCars(leaderDistributedDataStore.newReadOnlyTransaction(), car1, car2);
+ }
+
+ @Test
+ public void testTransactionForwardedToLeaderAfterRetry() throws Exception {
+ followerDatastoreContextBuilder.shardBatchedModificationCount(2);
+ leaderDatastoreContextBuilder.shardBatchedModificationCount(2);
+ initDatastoresWithCarsAndPeople("testTransactionForwardedToLeaderAfterRetry");
+
+ // Do an initial write to get the primary shard info cached.
+
+ DOMStoreWriteTransaction initialWriteTx = followerDistributedDataStore.newWriteOnlyTransaction();
+ initialWriteTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
+ initialWriteTx.write(PeopleModel.BASE_PATH, PeopleModel.emptyContainer());
+ followerTestKit.doCommit(initialWriteTx.ready());
+
+ // Wait for the commit to be replicated to the follower.
+
+ MemberNode.verifyRaftState(followerDistributedDataStore, "cars", new RaftStateVerifier() {
+ @Override
+ public void verify(OnDemandRaftState raftState) {
+ assertEquals("getLastApplied", 0, raftState.getLastApplied());
+ }
+ });
+
+ // Prepare, ready and canCommit a WO tx that writes to 2 shards. This will become the current tx in
+ // the leader shard.
+
+ DOMStoreWriteTransaction writeTx1 = followerDistributedDataStore.newWriteOnlyTransaction();
+ writeTx1.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());
+ writeTx1.write(PeopleModel.BASE_PATH, PeopleModel.emptyContainer());
+ DOMStoreThreePhaseCommitCohort writeTx1Cohort = writeTx1.ready();
+ ListenableFuture<Boolean> writeTx1CanCommit = writeTx1Cohort.canCommit();
+ writeTx1CanCommit.get(5, TimeUnit.SECONDS);
+
+ // Prepare and ready another WO tx that writes to 2 shards but don't canCommit yet. This will be queued
+ // in the leader shard.
+
+ DOMStoreWriteTransaction writeTx2 = followerDistributedDataStore.newWriteOnlyTransaction();
+ LinkedList<MapEntryNode> cars = new LinkedList<>();
+ int carIndex = 1;
+ cars.add(CarsModel.newCarEntry("car" + carIndex, BigInteger.valueOf(carIndex)));
+ writeTx2.write(CarsModel.newCarPath("car" + carIndex), cars.getLast());
+ carIndex++;
+ NormalizedNode<?, ?> people = PeopleModel.newPersonMapNode();
+ writeTx2.write(PeopleModel.PERSON_LIST_PATH, people);
+ DOMStoreThreePhaseCommitCohort writeTx2Cohort = writeTx2.ready();
+
+ // Prepare another WO that writes to a single shard and thus will be directly committed on ready. This
+ // tx writes 5 cars so 2 BatchedModidifications messages will be sent initially and cached in the
+ // leader shard (with shardBatchedModificationCount set to 2). The 3rd BatchedModidifications will be
+ // sent on ready.
+
+ DOMStoreWriteTransaction writeTx3 = followerDistributedDataStore.newWriteOnlyTransaction();
+ for(int i = 1; i <= 5; i++, carIndex++) {
+ cars.add(CarsModel.newCarEntry("car" + carIndex, BigInteger.valueOf(carIndex)));
+ writeTx3.write(CarsModel.newCarPath("car" + carIndex), cars.getLast());
+ }
+
+ // Prepare another WO that writes to a single shard. This will send a single BatchedModidifications
+ // message on ready.
+
+ DOMStoreWriteTransaction writeTx4 = followerDistributedDataStore.newWriteOnlyTransaction();
+ cars.add(CarsModel.newCarEntry("car" + carIndex, BigInteger.valueOf(carIndex)));
+ writeTx4.write(CarsModel.newCarPath("car" + carIndex), cars.getLast());
+ carIndex++;
+
+ // Prepare a RW tx that will create a tx actor and send a ForwardedReadyTransaciton message to the
+ // leader shard on ready.
+
+ DOMStoreReadWriteTransaction readWriteTx = followerDistributedDataStore.newReadWriteTransaction();
+ cars.add(CarsModel.newCarEntry("car" + carIndex, BigInteger.valueOf(carIndex)));
+ readWriteTx.write(CarsModel.newCarPath("car" + carIndex), cars.getLast());
+
+ IntegrationTestKit.verifyShardStats(leaderDistributedDataStore, "cars", new ShardStatsVerifier() {
+ @Override
+ public void verify(ShardStats stats) {
+ assertEquals("getReadWriteTransactionCount", 1, stats.getReadWriteTransactionCount());
+ }
+ });
+
+ // Disable elections on the leader so it switches to follower.
+
+ sendDatastoreContextUpdate(leaderDistributedDataStore, leaderDatastoreContextBuilder.
+ customRaftPolicyImplementation(DisableElectionsRaftPolicy.class.getName()).
+ shardElectionTimeoutFactor(10));
+
+ leaderTestKit.waitUntilNoLeader(leaderDistributedDataStore.getActorContext(), "cars");
+
+ // Submit all tx's - the messages should get queued for retry.
+
+ ListenableFuture<Boolean> writeTx2CanCommit = writeTx2Cohort.canCommit();
+ DOMStoreThreePhaseCommitCohort writeTx3Cohort = writeTx3.ready();
+ DOMStoreThreePhaseCommitCohort writeTx4Cohort = writeTx4.ready();
+ DOMStoreThreePhaseCommitCohort rwTxCohort = readWriteTx.ready();
+
+ // Enable elections on the other follower so it becomes the leader, at which point the
+ // tx's should get forwarded from the previous leader to the new leader to complete the commits.
+
+ sendDatastoreContextUpdate(followerDistributedDataStore, followerDatastoreContextBuilder.
+ customRaftPolicyImplementation(null).shardElectionTimeoutFactor(1));
+
+ followerTestKit.doCommit(writeTx1CanCommit, writeTx1Cohort);
+ followerTestKit.doCommit(writeTx2CanCommit, writeTx2Cohort);
+ followerTestKit.doCommit(writeTx3Cohort);
+ followerTestKit.doCommit(writeTx4Cohort);
+ followerTestKit.doCommit(rwTxCohort);
+
+ DOMStoreReadTransaction readTx = leaderDistributedDataStore.newReadOnlyTransaction();
+ verifyCars(readTx, cars.toArray(new MapEntryNode[cars.size()]));
+ verifyNode(readTx, PeopleModel.PERSON_LIST_PATH, people);
+ }
+
+ @Test
+ public void testLeadershipTransferOnShutdown() throws Exception {
+ leaderDatastoreContextBuilder.shardBatchedModificationCount(1);
+ followerDatastoreContextBuilder.shardElectionTimeoutFactor(10).customRaftPolicyImplementation(null);
+ String testName = "testLeadershipTransferOnShutdown";
+ initDatastores(testName, MODULE_SHARDS_CARS_PEOPLE_1_2_3, CARS_AND_PEOPLE);
+
+ IntegrationTestKit follower2TestKit = new IntegrationTestKit(follower2System, followerDatastoreContextBuilder);
+ try (DistributedDataStore follower2DistributedDataStore = follower2TestKit.setupDistributedDataStore(testName,
+ MODULE_SHARDS_CARS_PEOPLE_1_2_3, false)) {
+
+ // Create and submit a couple tx's so they're pending.
+
+ DOMStoreWriteTransaction writeTx = followerDistributedDataStore.newWriteOnlyTransaction();
+ writeTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
+ writeTx.write(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());
+ writeTx.write(PeopleModel.BASE_PATH, PeopleModel.emptyContainer());
+ DOMStoreThreePhaseCommitCohort cohort1 = writeTx.ready();
+
+ IntegrationTestKit.verifyShardStats(leaderDistributedDataStore, "cars", new ShardStatsVerifier() {
+ @Override
+ public void verify(ShardStats stats) {
+ assertEquals("getTxCohortCacheSize", 1, stats.getTxCohortCacheSize());
+ }
+ });
+
+ writeTx = followerDistributedDataStore.newWriteOnlyTransaction();
+ MapEntryNode car = CarsModel.newCarEntry("optima", BigInteger.valueOf(20000));
+ writeTx.write(CarsModel.newCarPath("optima"), car);
+ DOMStoreThreePhaseCommitCohort cohort2 = writeTx.ready();
+
+ IntegrationTestKit.verifyShardStats(leaderDistributedDataStore, "cars", new ShardStatsVerifier() {
+ @Override
+ public void verify(ShardStats stats) {
+ assertEquals("getTxCohortCacheSize", 2, stats.getTxCohortCacheSize());
+ }
+ });
+
+ // Gracefully stop the leader via a Shutdown message.
+
+ sendDatastoreContextUpdate(leaderDistributedDataStore, leaderDatastoreContextBuilder.
+ shardElectionTimeoutFactor(100));
+
+ FiniteDuration duration = FiniteDuration.create(5, TimeUnit.SECONDS);
+ Future<ActorRef> future = leaderDistributedDataStore.getActorContext().findLocalShardAsync("cars");
+ ActorRef leaderActor = Await.result(future, duration);
+
+ Future<Boolean> stopFuture = Patterns.gracefulStop(leaderActor, duration, Shutdown.INSTANCE);
+
+ // Commit the 2 transactions. They should finish and succeed.
+
+ followerTestKit.doCommit(cohort1);
+ followerTestKit.doCommit(cohort2);
+
+ // Wait for the leader actor stopped.
+
+ Boolean stopped = Await.result(stopFuture, duration);
+ assertEquals("Stopped", Boolean.TRUE, stopped);
+
+ // Verify leadership was transferred by reading the committed data from the other nodes.
+
+ verifyCars(followerDistributedDataStore.newReadOnlyTransaction(), car);
+ verifyCars(follower2DistributedDataStore.newReadOnlyTransaction(), car);
+ }
+ }
+
+ @Test
+ public void testTransactionWithIsolatedLeader() throws Throwable {
+ leaderDatastoreContextBuilder.shardIsolatedLeaderCheckIntervalInMillis(200);
+ String testName = "testTransactionWithIsolatedLeader";
+ initDatastoresWithCars(testName);
+
+ DOMStoreWriteTransaction failWriteTx = leaderDistributedDataStore.newWriteOnlyTransaction();
+ failWriteTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
+
+ DOMStoreWriteTransaction successWriteTx = leaderDistributedDataStore.newWriteOnlyTransaction();
+ successWriteTx.merge(CarsModel.BASE_PATH, CarsModel.emptyContainer());
+
+ followerTestKit.watch(followerDistributedDataStore.getActorContext().getShardManager());
+ followerDistributedDataStore.close();
+ followerTestKit.expectTerminated(followerDistributedDataStore.getActorContext().getShardManager());
+
+ MemberNode.verifyRaftState(leaderDistributedDataStore, "cars", new RaftStateVerifier() {
+ @Override
+ public void verify(OnDemandRaftState raftState) {
+ assertEquals("getRaftState", "IsolatedLeader", raftState.getRaftState());
+ }
+ });
+
+ try {
+ leaderTestKit.doCommit(failWriteTx.ready());
+ fail("Expected NoShardLeaderException");
+ } catch (ExecutionException e) {
+ assertEquals("getCause", NoShardLeaderException.class, e.getCause().getClass());
+ }
+
+ sendDatastoreContextUpdate(leaderDistributedDataStore, leaderDatastoreContextBuilder.
+ shardElectionTimeoutFactor(100));
+
+ DOMStoreThreePhaseCommitCohort writeTxCohort = successWriteTx.ready();
+
+ followerDistributedDataStore = followerTestKit.setupDistributedDataStore(testName,
+ MODULE_SHARDS_CARS_ONLY_1_2, false, CARS);
+
+ leaderTestKit.doCommit(writeTxCohort);
+ }
+
+ @Test(expected=AskTimeoutException.class)
+ public void testTransactionWithShardLeaderNotResponding() throws Throwable {
+ initDatastoresWithCars("testTransactionWithShardLeaderNotResponding");
+
+ // Do an initial read to get the primary shard info cached.
+
+ DOMStoreReadTransaction readTx = followerDistributedDataStore.newReadOnlyTransaction();
+ readTx.read(CarsModel.BASE_PATH).checkedGet(5, TimeUnit.SECONDS);
+
+ // Shutdown the leader and try to create a new tx.
+
+ JavaTestKit.shutdownActorSystem(leaderSystem, null, true);
+
+ followerDatastoreContextBuilder.operationTimeoutInMillis(50).shardElectionTimeoutFactor(1);
+ sendDatastoreContextUpdate(followerDistributedDataStore, followerDatastoreContextBuilder);
+
+ DOMStoreReadWriteTransaction rwTx = followerDistributedDataStore.newReadWriteTransaction();
+
+ rwTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
+
+ try {
+ followerTestKit.doCommit(rwTx.ready());
+ } catch (ExecutionException e) {
+ assertTrue("Expected ShardLeaderNotRespondingException cause. Actual: " + e.getCause(),
+ e.getCause() instanceof ShardLeaderNotRespondingException);
+ assertNotNull("Expected a nested cause", e.getCause().getCause());
+ throw e.getCause().getCause();
+ }
+ }
+
+ @Test(expected=NoShardLeaderException.class)
+ public void testTransactionWithCreateTxFailureDueToNoLeader() throws Throwable {
+ initDatastoresWithCars("testTransactionWithCreateTxFailureDueToNoLeader");
+
+ // Do an initial read to get the primary shard info cached.
+
+ DOMStoreReadTransaction readTx = followerDistributedDataStore.newReadOnlyTransaction();
+ readTx.read(CarsModel.BASE_PATH).checkedGet(5, TimeUnit.SECONDS);
+
+ // Shutdown the leader and try to create a new tx.
+
+ JavaTestKit.shutdownActorSystem(leaderSystem, null, true);
+
+ Uninterruptibles.sleepUninterruptibly(100, TimeUnit.MILLISECONDS);
+
+ sendDatastoreContextUpdate(followerDistributedDataStore, followerDatastoreContextBuilder.
+ operationTimeoutInMillis(10).shardElectionTimeoutFactor(1).customRaftPolicyImplementation(null));
+
+ DOMStoreReadWriteTransaction rwTx = followerDistributedDataStore.newReadWriteTransaction();
+
+ rwTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
+
+ try {
+ followerTestKit.doCommit(rwTx.ready());
+ } catch (ExecutionException e) {
+ throw e.getCause();
+ }
+ }
+
+ @Test
+ public void testTransactionRetryWithInitialAskTimeoutExOnCreateTx() throws Exception {
+ String testName = "testTransactionRetryWithInitialAskTimeoutExOnCreateTx";
+ initDatastores(testName, MODULE_SHARDS_CARS_PEOPLE_1_2_3, CARS);
+
+ DatastoreContext.Builder follower2DatastoreContextBuilder = DatastoreContext.newBuilder().
+ shardHeartbeatIntervalInMillis(100).shardElectionTimeoutFactor(5);
+ IntegrationTestKit follower2TestKit = new IntegrationTestKit(follower2System, follower2DatastoreContextBuilder);
+
+ try (DistributedDataStore ds =
+ follower2TestKit.setupDistributedDataStore(testName, MODULE_SHARDS_CARS_PEOPLE_1_2_3, false, CARS)) {
+
+ followerTestKit.waitForMembersUp("member-1", "member-3");
+ follower2TestKit.waitForMembersUp("member-1", "member-2");
+
+ // Do an initial read to get the primary shard info cached.
+
+ DOMStoreReadTransaction readTx = followerDistributedDataStore.newReadOnlyTransaction();
+ readTx.read(CarsModel.BASE_PATH).checkedGet(5, TimeUnit.SECONDS);
+
+ // Shutdown the leader and try to create a new tx.
+
+ JavaTestKit.shutdownActorSystem(leaderSystem, null, true);
+
+ sendDatastoreContextUpdate(followerDistributedDataStore, followerDatastoreContextBuilder.
+ operationTimeoutInMillis(500).shardElectionTimeoutFactor(1).customRaftPolicyImplementation(null));
+
+ DOMStoreReadWriteTransaction rwTx = followerDistributedDataStore.newReadWriteTransaction();
+
+ rwTx.write(CarsModel.BASE_PATH, CarsModel.emptyContainer());
+
+ followerTestKit.doCommit(rwTx.ready());
+ }
+ }