Examples with ReadReplica org.neo4j.causalclustering.discovery.ReadReplica used on opensource projects

Example 6 with ReadReplica

use of org.neo4j.causalclustering.discovery.ReadReplica in project neo4j by neo4j.

the class ReadReplicaReplicationIT method allServersBecomeAvailable.

@Test
public void allServersBecomeAvailable() throws Exception {
    // given
    Cluster cluster = clusterRule.startCluster();
    // then
    for (final ReadReplica readReplica : cluster.readReplicas()) {
        ThrowingSupplier<Boolean, Exception> availability = () -> readReplica.database().isAvailable(0);
        assertEventually("read replica becomes available", availability, is(true), 10, SECONDS);
    }
}

Example 7 with ReadReplica

use of org.neo4j.causalclustering.discovery.ReadReplica in project neo4j by neo4j.

the class ReadReplicaReplicationIT method shouldBeAbleToPullTxAfterHavingDownloadedANewStoreAfterPruning.

@Test
public void shouldBeAbleToPullTxAfterHavingDownloadedANewStoreAfterPruning() throws Exception {
    // given
    Map<String, String> params = stringMap(GraphDatabaseSettings.keep_logical_logs.name(), "keep_none", GraphDatabaseSettings.logical_log_rotation_threshold.name(), "1M", GraphDatabaseSettings.check_point_interval_time.name(), "100ms");
    Cluster cluster = clusterRule.withSharedCoreParams(params).startCluster();
    cluster.coreTx((db, tx) -> {
        createData(db, 10);
        tx.success();
    });
    awaitEx(() -> readReplicasUpToDateAsTheLeader(cluster.awaitLeader(), cluster.readReplicas()), 1, TimeUnit.MINUTES);
    ReadReplica readReplica = cluster.getReadReplicaById(0);
    long highestReadReplicaLogVersion = physicalLogFiles(readReplica).getHighestLogVersion();
    readReplica.shutdown();
    CoreClusterMember core;
    do {
        core = cluster.coreTx((db, tx) -> {
            createData(db, 1_000);
            tx.success();
        });
    } while (physicalLogFiles(core).getLowestLogVersion() <= highestReadReplicaLogVersion);
    readReplica.start();
    awaitEx(() -> readReplicasUpToDateAsTheLeader(cluster.awaitLeader(), cluster.readReplicas()), 1, TimeUnit.MINUTES);
    // when
    cluster.coreTx((db, tx) -> {
        createData(db, 10);
        tx.success();
    });
    // then
    assertEventually("The read replica has the same data as the core members", () -> DbRepresentation.of(readReplica.database()), equalTo(DbRepresentation.of(cluster.awaitLeader().database())), 10, TimeUnit.SECONDS);
}

Example 8 with ReadReplica

use of org.neo4j.causalclustering.discovery.ReadReplica in project neo4j by neo4j.

the class ReadReplicaStoreCopyIT method shouldNotBePossibleToStartTransactionsWhenReadReplicaCopiesStore.

@Test(timeout = 120_000)
public void shouldNotBePossibleToStartTransactionsWhenReadReplicaCopiesStore() throws Throwable {
    Cluster cluster = clusterRule.startCluster();
    ReadReplica readReplica = cluster.findAnyReadReplica();
    readReplica.txPollingClient().stop();
    writeSomeDataAndForceLogRotations(cluster);
    Semaphore storeCopyBlockingSemaphore = addStoreCopyBlockingMonitor(readReplica);
    try {
        readReplica.txPollingClient().start();
        waitForStoreCopyToStartAndBlock(storeCopyBlockingSemaphore);
        ReadReplicaGraphDatabase replicaGraphDatabase = readReplica.database();
        try {
            replicaGraphDatabase.beginTx();
            fail("Exception expected");
        } catch (Exception e) {
            assertThat(e, instanceOf(TransactionFailureException.class));
            assertThat(e.getMessage(), containsString("Database is stopped to copy store"));
        }
    } finally {
        // release all waiters of the semaphore
        storeCopyBlockingSemaphore.release(Integer.MAX_VALUE);
    }
}

Example 9 with ReadReplica

use of org.neo4j.causalclustering.discovery.ReadReplica in project neo4j by neo4j.

the class ClusterFormationIT method shouldSupportBuiltInProcedures.

@Test
public void shouldSupportBuiltInProcedures() throws Exception {
    cluster.addReadReplicaWithId(0).start();
    Stream.concat(cluster.readReplicas().stream().map(ReadReplica::database), cluster.coreMembers().stream().map(CoreClusterMember::database)).forEach(gdb -> {
        {
            Result result = gdb.execute("CALL dbms.procedures()");
            assertTrue(result.hasNext());
            result.close();
        }
        try (InternalTransaction tx = gdb.beginTransaction(KernelTransaction.Type.explicit, EnterpriseSecurityContext.AUTH_DISABLED)) {
            Result result = gdb.execute(tx, "CALL dbms.listQueries()", Collections.emptyMap());
            assertTrue(result.hasNext());
            result.close();
            tx.success();
        }
    });
}

Example 10 with ReadReplica

use of org.neo4j.causalclustering.discovery.ReadReplica in project neo4j by neo4j.

the class CausalClusteringProceduresIT method readReplicaProceduresShouldBeAvailable.

@Test
public void readReplicaProceduresShouldBeAvailable() throws Exception {
    // given
    String[] readReplicaProcs = new String[] { // Server role
    "dbms.cluster.role", // Kernel built procedures
    "dbms.procedures", // Built in procedure from enterprise
    "dbms.listQueries" };
    // when
    for (String procedure : readReplicaProcs) {
        Optional<ReadReplica> firstReadReplica = cluster.readReplicas().stream().findFirst();
        assert firstReadReplica.isPresent();
        ReadReplicaGraphDatabase database = firstReadReplica.get().database();
        InternalTransaction tx = database.beginTransaction(KernelTransaction.Type.explicit, AUTH_DISABLED);
        Result readReplicaResult = database.execute("CALL " + procedure + "()");
        // then
        assertTrue("read replica with procedure " + procedure, readReplicaResult.hasNext());
        readReplicaResult.close();
        tx.close();
    }
}