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

Example 16 with ReadReplica

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

the class ReadReplicaStoreCopyIT method addStoreCopyBlockingMonitor.

private static Semaphore addStoreCopyBlockingMonitor(ReadReplica readReplica) {
    DependencyResolver dependencyResolver = readReplica.database().getDependencyResolver();
    Monitors monitors = dependencyResolver.resolveDependency(Monitors.class);
    Semaphore semaphore = new Semaphore(0);
    monitors.addMonitorListener((FileCopyMonitor) file -> {
        try {
            semaphore.acquire();
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            throw new RuntimeException(e);
        }
    });
    return semaphore;
}

Example 17 with ReadReplica

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

the class ReadReplicaToReadReplicaCatchupIT method checkDataHasReplicatedToReadReplicas.

static void checkDataHasReplicatedToReadReplicas(Cluster cluster, long numberOfNodes) throws Exception {
    for (final ReadReplica server : cluster.readReplicas()) {
        GraphDatabaseService readReplica = server.database();
        try (Transaction tx = readReplica.beginTx()) {
            ThrowingSupplier<Long, Exception> nodeCount = () -> count(readReplica.getAllNodes());
            assertEventually("node to appear on read replica", nodeCount, is(numberOfNodes), 1, MINUTES);
            for (Node node : readReplica.getAllNodes()) {
                assertThat(node.getProperty("foobar").toString(), startsWith("baz_bat"));
            }
            tx.success();
        }
    }
}

Example 18 with ReadReplica

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

the class ReadReplicaToReadReplicaCatchupIT method shouldCatchUpFromCoresWhenPreferredReadReplicasAreUnavailable.

@Test
public void shouldCatchUpFromCoresWhenPreferredReadReplicasAreUnavailable() throws Throwable {
    // given
    Cluster cluster = clusterRule.startCluster();
    int numberOfNodes = 1;
    int firstReadReplicaLocalMemberId = 101;
    cluster.coreTx((db, tx) -> {
        db.schema().constraintFor(label("Foo")).assertPropertyIsUnique("foobar").create();
        tx.success();
    });
    createLabelledNodesWithProperty(cluster, numberOfNodes, label("Foo"), () -> Pair.of("foobar", String.format("baz_bat%s", UUID.randomUUID())));
    ReadReplica firstReadReplica = cluster.addReadReplicaWithIdAndMonitors(firstReadReplicaLocalMemberId, new Monitors());
    firstReadReplica.start();
    checkDataHasReplicatedToReadReplicas(cluster, numberOfNodes);
    upstreamFactory.setCurrent(firstReadReplica);
    ReadReplica secondReadReplica = cluster.addReadReplicaWithId(202);
    secondReadReplica.setUpstreamDatabaseSelectionStrategy("specific");
    secondReadReplica.start();
    checkDataHasReplicatedToReadReplicas(cluster, numberOfNodes);
    firstReadReplica.shutdown();
    upstreamFactory.reset();
    cluster.removeReadReplicaWithMemberId(firstReadReplicaLocalMemberId);
    // when
    // More transactions into core
    createLabelledNodesWithProperty(cluster, numberOfNodes, label("Foo"), () -> Pair.of("foobar", String.format("baz_bat%s", UUID.randomUUID())));
    // then
    // reached second read replica from cores
    checkDataHasReplicatedToReadReplicas(cluster, numberOfNodes * 2);
}

Example 19 with ReadReplica

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

the class ReadReplicaToReadReplicaCatchupIT method shouldEventuallyPullTransactionAcrossReadReplicas.

@Test
public void shouldEventuallyPullTransactionAcrossReadReplicas() throws Throwable {
    // given
    Cluster cluster = clusterRule.startCluster();
    int numberOfNodesToCreate = 100;
    cluster.coreTx((db, tx) -> {
        db.schema().constraintFor(label("Foo")).assertPropertyIsUnique("foobar").create();
        tx.success();
    });
    createLabelledNodesWithProperty(cluster, numberOfNodesToCreate, label("Foo"), () -> Pair.of("foobar", String.format("baz_bat%s", UUID.randomUUID())));
    ReadReplica firstReadReplica = cluster.addReadReplicaWithIdAndMonitors(101, new Monitors());
    firstReadReplica.start();
    checkDataHasReplicatedToReadReplicas(cluster, numberOfNodesToCreate);
    for (CoreClusterMember coreClusterMember : cluster.coreMembers()) {
        coreClusterMember.stopCatchupServer();
    }
    // when
    upstreamFactory.setCurrent(firstReadReplica);
    ReadReplica secondReadReplica = cluster.addReadReplicaWithId(202);
    secondReadReplica.setUpstreamDatabaseSelectionStrategy("specific");
    secondReadReplica.start();
    // then
    checkDataHasReplicatedToReadReplicas(cluster, numberOfNodesToCreate);
}

Example 20 with ReadReplica

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

the class RestartIT method readReplicaTest.

@Test
public void readReplicaTest() throws Exception {
    // given
    Cluster cluster = clusterRule.withNumberOfCoreMembers(2).withNumberOfReadReplicas(1).startCluster();
    // when
    final GraphDatabaseService coreDB = cluster.awaitLeader(5, TimeUnit.SECONDS).database();
    try (Transaction tx = coreDB.beginTx()) {
        Node node = coreDB.createNode(label("boo"));
        node.setProperty("foobar", "baz_bat");
        tx.success();
    }
    cluster.addCoreMemberWithId(2).start();
    cluster.shutdown();
    try (FileSystemAbstraction fileSystem = new DefaultFileSystemAbstraction()) {
        for (CoreClusterMember core : cluster.coreMembers()) {
            ConsistencyCheckService.Result result = new ConsistencyCheckService().runFullConsistencyCheck(core.storeDir(), Config.embeddedDefaults(), ProgressMonitorFactory.NONE, NullLogProvider.getInstance(), fileSystem, false, new CheckConsistencyConfig(true, true, true, false));
            assertTrue("Inconsistent: " + core, result.isSuccessful());
        }
        for (ReadReplica readReplica : cluster.readReplicas()) {
            ConsistencyCheckService.Result result = new ConsistencyCheckService().runFullConsistencyCheck(readReplica.storeDir(), Config.embeddedDefaults(), ProgressMonitorFactory.NONE, NullLogProvider.getInstance(), fileSystem, false, new CheckConsistencyConfig(true, true, true, false));
            assertTrue("Inconsistent: " + readReplica, result.isSuccessful());
        }
    }
}