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

Example 16 with Cluster

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

the class ClusterDiscoveryIT method shouldNotBeAbleToDiscoverFromReadReplicas.

@Test
public void shouldNotBeAbleToDiscoverFromReadReplicas() throws Exception {
    // given
    Cluster cluster = clusterRule.withSharedCoreParams(config).withNumberOfReadReplicas(2).startCluster();
    try {
        // when
        getMembers(cluster.getReadReplicaById(0).database());
        fail("Should not be able to discover members from read replicas");
    } catch (ProcedureException ex) {
        // then
        assertThat(ex.getMessage(), containsString("There is no procedure with the name"));
    }
}

Example 17 with Cluster

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

the class ClusterLeaderStepDownIT method leaderShouldStepDownWhenFollowersAreGone.

@Test
public void leaderShouldStepDownWhenFollowersAreGone() throws Throwable {
    // when
    Cluster cluster = clusterRule.startCluster();
    //Do some work to make sure the cluster is operating normally.
    CoreClusterMember leader = cluster.coreTx((db, tx) -> {
        Node node = db.createNode(Label.label("bam"));
        node.setProperty("bam", "bam");
        tx.success();
    });
    List<CoreClusterMember> followers = cluster.coreMembers().stream().filter(m -> m.raft().currentRole() != Role.LEADER).collect(toList());
    assertEquals(7, followers.size());
    //when
    //shutdown 4 servers, leaving 4 remaining and therefore not a quorum.
    followers.subList(0, 4).forEach(CoreClusterMember::shutdown);
    //then
    assertEventually("Leader should have stepped down.", () -> leader.raft().isLeader(), Matchers.is(false), 2, TimeUnit.MINUTES);
}

Example 18 with Cluster

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

the class ClusterMembershipChangeIT method newMemberNotInInitialMembersConfig.

@Test
@Ignore("Incomplete, HC will hang waiting for others to join.")
public void newMemberNotInInitialMembersConfig() throws Throwable {
    // when
    Cluster cluster = clusterRule.withNumberOfReadReplicas(0).startCluster();
    List<AdvertisedSocketAddress> onlyServerZero = singletonList(Cluster.socketAddressForServer(0));
    // then
    cluster.addCoreMemberWithIdAndInitialMembers(3, onlyServerZero).start();
    cluster.addCoreMemberWithIdAndInitialMembers(4, onlyServerZero).start();
    cluster.addCoreMemberWithIdAndInitialMembers(5, onlyServerZero).start();
    cluster.removeCoreMemberWithMemberId(0);
    cluster.removeCoreMemberWithMemberId(1);
    cluster.removeCoreMemberWithMemberId(2);
    cluster.shutdown();
    cluster.start();
    List<Object[]> currentMembers;
    for (CoreClusterMember member : cluster.coreMembers()) {
        currentMembers = discoverClusterMembers(member.database());
        assertThat(currentMembers, containsInAnyOrder(new Object[] { "127.0.0.1:8003" }, new Object[] { "127.0.0.1:8004" }, new Object[] { "127.0.0.1:8005" }));
    }
}

Example 19 with Cluster

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

the class ClusterOverviewIT method shouldDiscoverCoreMembers.

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

Example 20 with Cluster

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

the class ClusterOverviewIT method shouldDiscoverCoreMembersAndReadReplicas.

@Test
public void shouldDiscoverCoreMembersAndReadReplicas() throws Exception {
    // given
    clusterRule.withNumberOfCoreMembers(3);
    clusterRule.withNumberOfReadReplicas(3);
    // when
    Cluster cluster = clusterRule.startCluster();
    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);
    }
}