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

Example 41 with Cluster

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

the class RecoveryIT method shouldBeConsistentAfterShutdown.

@Test
public void shouldBeConsistentAfterShutdown() throws Exception {
    // given
    Cluster cluster = clusterRule.startCluster();
    fireSomeLoadAtTheCluster(cluster);
    Set<File> storeDirs = cluster.coreMembers().stream().map(CoreClusterMember::storeDir).collect(toSet());
    assertEventually("All cores have the same data", () -> cluster.coreMembers().stream().map(this::dbRepresentation).collect(toSet()).size(), equalTo(1), 10, TimeUnit.SECONDS);
    // when
    cluster.shutdown();
    // then
    storeDirs.forEach(this::assertConsistent);
}

Example 42 with Cluster

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

the class RestartIT method shouldHaveWritableClusterAfterCompleteRestart.

@Test
public void shouldHaveWritableClusterAfterCompleteRestart() throws Exception {
    // given
    Cluster cluster = clusterRule.startCluster();
    cluster.shutdown();
    // when
    cluster.start();
    CoreClusterMember last = cluster.coreTx((db, tx) -> {
        Node node = db.createNode(label("boo"));
        node.setProperty("foobar", "baz_bat");
        tx.success();
    });
    // then
    dataMatchesEventually(last, cluster.coreMembers());
    cluster.shutdown();
}

Example 43 with Cluster

use of org.neo4j.causalclustering.discovery.Cluster 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());
        }
    }
}

Example 44 with Cluster

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

the class RestartIT method restartWhileDoingTransactions.

@Test
public void restartWhileDoingTransactions() throws Exception {
    // given
    Cluster cluster = clusterRule.startCluster();
    // when
    final GraphDatabaseService coreDB = cluster.getCoreMemberById(0).database();
    ExecutorService executor = Executors.newCachedThreadPool();
    final AtomicBoolean done = new AtomicBoolean(false);
    executor.execute(() -> {
        while (!done.get()) {
            try (Transaction tx = coreDB.beginTx()) {
                Node node = coreDB.createNode(label("boo"));
                node.setProperty("foobar", "baz_bat");
                tx.success();
            } catch (AcquireLockTimeoutException | WriteOperationsNotAllowedException e) {
            // expected sometimes
            }
        }
    });
    Thread.sleep(500);
    cluster.removeCoreMemberWithMemberId(1);
    cluster.addCoreMemberWithId(1).start();
    Thread.sleep(500);
    // then
    done.set(true);
    executor.shutdown();
}

Example 45 with Cluster

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

the class ClusterDiscoveryIT method shouldFindReadWriteAndRouteServers.

@Test
public void shouldFindReadWriteAndRouteServers() throws Exception {
    // when
    Cluster cluster = clusterRule.withSharedCoreParams(config).withNumberOfReadReplicas(1).startCluster();
    // then
    int cores = cluster.coreMembers().size();
    int readReplicas = cluster.readReplicas().size();
    int readEndPoints = expectFollowersAsReadEndPoints ? (cores - 1 + readReplicas) : readReplicas;
    for (int i = 0; i < 3; i++) {
        List<Map<String, Object>> members = getMembers(cluster.getCoreMemberById(i).database());
        assertEquals(1, members.stream().filter(x -> x.get("role").equals("WRITE")).flatMap(x -> Arrays.stream((Object[]) x.get("addresses"))).count());
        assertEquals(readEndPoints, members.stream().filter(x -> x.get("role").equals("READ")).flatMap(x -> Arrays.stream((Object[]) x.get("addresses"))).count());
        assertEquals(cores, members.stream().filter(x -> x.get("role").equals("ROUTE")).flatMap(x -> Arrays.stream((Object[]) x.get("addresses"))).count());
    }
}