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

Example 21 with Cluster

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

the class ClusterOverviewIT method shouldDiscoverNewCoreMembers.

@Test
public void shouldDiscoverNewCoreMembers() throws Exception {
    // given
    clusterRule.withNumberOfCoreMembers(3);
    clusterRule.withNumberOfReadReplicas(0);
    Cluster cluster = clusterRule.startCluster();
    // when
    cluster.addCoreMemberWithId(3).start();
    cluster.addCoreMemberWithId(4).start();
    Matcher<List<MemberInfo>> expected = allOf(containsMemberAddresses(cluster.coreMembers()), containsRole(LEADER, 1), containsRole(FOLLOWER, 4));
    for (int coreServerId = 0; coreServerId < 5; coreServerId++) {
        // then
        assertEventualOverview(cluster, expected, coreServerId);
    }
}

Example 22 with Cluster

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

the class ClusterOverviewIT method shouldDiscoverReadReplicasAfterRestartingCores.

@Test
public void shouldDiscoverReadReplicasAfterRestartingCores() throws Exception {
    // given
    clusterRule.withNumberOfCoreMembers(3);
    clusterRule.withNumberOfReadReplicas(3);
    // when
    Cluster cluster = clusterRule.startCluster();
    cluster.shutdownCoreMembers();
    cluster.startCoreMembers();
    Matcher<List<MemberInfo>> expected = allOf(containsAllMemberAddresses(cluster.coreMembers(), cluster.readReplicas()), containsRole(LEADER, 1), containsRole(FOLLOWER, 2), containsRole(READ_REPLICA, 3));
    for (int coreServerId = 0; coreServerId < 3; coreServerId++) {
        // then
        assertEventualOverview(cluster, expected, coreServerId);
    }
}

Example 23 with Cluster

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

the class CausalClusteringRolesIT method readReplicasShouldRefuseWrites.

@Test
public void readReplicasShouldRefuseWrites() throws Exception {
    // given
    Cluster cluster = clusterRule.startCluster();
    GraphDatabaseService db = cluster.findAnyReadReplica().database();
    Transaction tx = db.beginTx();
    // then
    exceptionMatcher.expect(WriteOperationsNotAllowedException.class);
    // when
    db.createNode();
    tx.success();
    tx.close();
}

Example 24 with Cluster

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

the class ClusterShutdownIT method shouldShutdownEvenThoughWaitingForLock.

@Test
public void shouldShutdownEvenThoughWaitingForLock() throws Exception {
    Cluster cluster = clusterRule.startCluster();
    try {
        for (int victimId = 0; victimId < cluster.numberOfCoreMembersReportedByTopology(); victimId++) {
            assertTrue(cluster.getCoreMemberById(victimId).database().isAvailable(1000));
            shouldShutdownEvenThoughWaitingForLock0(cluster, victimId, shutdownOrder);
            cluster.start();
        }
    } catch (WriteOperationsNotAllowedException e) {
    // expected
    }
}

Example 25 with Cluster

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

the class CorePruningIT method actuallyDeletesTheFiles.

@Test
public void actuallyDeletesTheFiles() throws Exception {
    // given
    Cluster cluster = clusterRule.startCluster();
    CoreClusterMember coreGraphDatabase = null;
    int txs = 10;
    for (int i = 0; i < txs; i++) {
        coreGraphDatabase = cluster.coreTx((db, tx) -> {
            createData(db, 1);
            tx.success();
        });
    }
    // when pruning kicks in then some files are actually deleted
    File raftLogDir = coreGraphDatabase.raftLogDirectory();
    int expectedNumberOfLogFilesAfterPruning = 2;
    assertEventually("raft logs eventually pruned", () -> numberOfFiles(raftLogDir), equalTo(expectedNumberOfLogFilesAfterPruning), 5, TimeUnit.SECONDS);
}