Examples with LeaderLocator org.neo4j.causalclustering.core.consensus.LeaderLocator used on opensource projects

Example 1 with LeaderLocator

use of org.neo4j.causalclustering.core.consensus.LeaderLocator in project neo4j by neo4j.

the class GetServersProcedureV1RoutingTest method shouldReturnEndpointsInDifferentOrders.

@Test
public void shouldReturnEndpointsInDifferentOrders() throws Exception {
    // given
    final CoreTopologyService coreTopologyService = mock(CoreTopologyService.class);
    LeaderLocator leaderLocator = mock(LeaderLocator.class);
    when(leaderLocator.getLeader()).thenReturn(member(0));
    Map<MemberId, CoreServerInfo> coreMembers = new HashMap<>();
    coreMembers.put(member(0), adressesForCore(0));
    coreMembers.put(member(1), adressesForCore(1));
    coreMembers.put(member(2), adressesForCore(2));
    final CoreTopology clusterTopology = new CoreTopology(clusterId, false, coreMembers);
    when(coreTopologyService.coreServers()).thenReturn(clusterTopology);
    when(coreTopologyService.readReplicas()).thenReturn(new ReadReplicaTopology(emptyMap()));
    final LegacyGetServersProcedure proc = new LegacyGetServersProcedure(coreTopologyService, leaderLocator, config, getInstance());
    // when
    Object[] endpoints = getEndpoints(proc);
    //then
    Object[] endpointsInDifferentOrder = getEndpoints(proc);
    for (int i = 0; i < 100; i++) {
        if (Arrays.deepEquals(endpointsInDifferentOrder, endpoints)) {
            endpointsInDifferentOrder = getEndpoints(proc);
        } else {
            //Different order of servers, no need to retry.
            break;
        }
    }
    assertFalse(Arrays.deepEquals(endpoints, endpointsInDifferentOrder));
}

Example 2 with LeaderLocator

use of org.neo4j.causalclustering.core.consensus.LeaderLocator in project neo4j by neo4j.

the class GetServersProcedureV1Test method ttlShouldBeInSeconds.

@Test
public void ttlShouldBeInSeconds() throws Exception {
    // given
    final CoreTopologyService coreTopologyService = mock(CoreTopologyService.class);
    LeaderLocator leaderLocator = mock(LeaderLocator.class);
    final CoreTopology clusterTopology = new CoreTopology(clusterId, false, new HashMap<>());
    when(coreTopologyService.coreServers()).thenReturn(clusterTopology);
    when(coreTopologyService.readReplicas()).thenReturn(new ReadReplicaTopology(emptyMap()));
    // set the TTL in minutes
    config = config.augment(stringMap(cluster_routing_ttl.name(), "10m"));
    final LegacyGetServersProcedure proc = new LegacyGetServersProcedure(coreTopologyService, leaderLocator, config, getInstance());
    // when
    List<Object[]> results = asList(proc.apply(null, new Object[0]));
    // then
    Object[] rows = results.get(0);
    long ttlInSeconds = (long) rows[0];
    assertEquals(600, ttlInSeconds);
}

Example 3 with LeaderLocator

use of org.neo4j.causalclustering.core.consensus.LeaderLocator in project neo4j by neo4j.

the class GetServersProcedureV1Test method shouldReturnNoWriteEndpointsIfThereIsNoAddressForTheLeader.

@Test
public void shouldReturnNoWriteEndpointsIfThereIsNoAddressForTheLeader() throws Exception {
    // given
    final CoreTopologyService topologyService = mock(CoreTopologyService.class);
    Map<MemberId, CoreServerInfo> coreMembers = new HashMap<>();
    coreMembers.put(member(0), adressesForCore(0));
    when(topologyService.coreServers()).thenReturn(new CoreTopology(clusterId, false, coreMembers));
    when(topologyService.readReplicas()).thenReturn(new ReadReplicaTopology(emptyMap()));
    LeaderLocator leaderLocator = mock(LeaderLocator.class);
    when(leaderLocator.getLeader()).thenReturn(member(1));
    LegacyGetServersProcedure procedure = new LegacyGetServersProcedure(topologyService, leaderLocator, config, getInstance());
    // when
    ClusterView clusterView = run(procedure);
    // then
    ClusterView.Builder builder = new ClusterView.Builder();
    builder.readAddress(adressesForCore(0).connectors().boltAddress());
    builder.routeAddress(adressesForCore(0).connectors().boltAddress());
    assertEquals(builder.build(), clusterView);
}

Example 4 with LeaderLocator

use of org.neo4j.causalclustering.core.consensus.LeaderLocator in project neo4j by neo4j.

the class GetServersProcedureV1Test method shouldReturnNoWriteEndpointsIfThereIsNoLeader.

@Test
public void shouldReturnNoWriteEndpointsIfThereIsNoLeader() throws Exception {
    // given
    final CoreTopologyService topologyService = mock(CoreTopologyService.class);
    Map<MemberId, CoreServerInfo> coreMembers = new HashMap<>();
    coreMembers.put(member(0), adressesForCore(0));
    when(topologyService.coreServers()).thenReturn(new CoreTopology(clusterId, false, coreMembers));
    when(topologyService.readReplicas()).thenReturn(new ReadReplicaTopology(emptyMap()));
    LeaderLocator leaderLocator = mock(LeaderLocator.class);
    when(leaderLocator.getLeader()).thenThrow(new NoLeaderFoundException());
    LegacyGetServersProcedure procedure = new LegacyGetServersProcedure(topologyService, leaderLocator, config, getInstance());
    // when
    ClusterView clusterView = run(procedure);
    // then
    ClusterView.Builder builder = new ClusterView.Builder();
    builder.readAddress(adressesForCore(0).connectors().boltAddress());
    builder.routeAddress(adressesForCore(0).connectors().boltAddress());
    assertEquals(builder.build(), clusterView);
}

Example 5 with LeaderLocator

use of org.neo4j.causalclustering.core.consensus.LeaderLocator in project neo4j by neo4j.

the class ClusterOverviewProcedureTest method shouldProvideOverviewOfCoreServersAndReadReplicas.

@Test
public void shouldProvideOverviewOfCoreServersAndReadReplicas() throws Exception {
    // given
    final CoreTopologyService topologyService = mock(CoreTopologyService.class);
    Map<MemberId, CoreServerInfo> coreMembers = new HashMap<>();
    MemberId theLeader = new MemberId(UUID.randomUUID());
    MemberId follower1 = new MemberId(UUID.randomUUID());
    MemberId follower2 = new MemberId(UUID.randomUUID());
    coreMembers.put(theLeader, adressesForCore(0));
    coreMembers.put(follower1, adressesForCore(1));
    coreMembers.put(follower2, adressesForCore(2));
    Map<MemberId, ReadReplicaInfo> replicaMembers = new HashMap<>();
    MemberId replica4 = new MemberId(UUID.randomUUID());
    MemberId replica5 = new MemberId(UUID.randomUUID());
    replicaMembers.put(replica4, addressesForReadReplica(4));
    replicaMembers.put(replica5, addressesForReadReplica(5));
    when(topologyService.coreServers()).thenReturn(new CoreTopology(null, false, coreMembers));
    when(topologyService.readReplicas()).thenReturn(new ReadReplicaTopology(replicaMembers));
    LeaderLocator leaderLocator = mock(LeaderLocator.class);
    when(leaderLocator.getLeader()).thenReturn(theLeader);
    ClusterOverviewProcedure procedure = new ClusterOverviewProcedure(topologyService, leaderLocator, NullLogProvider.getInstance());
    // when
    final RawIterator<Object[], ProcedureException> members = procedure.apply(null, new Object[0]);
    assertThat(members.next(), new IsRecord(theLeader.getUuid(), 5000, Role.LEADER, asSet("core", "core0")));
    assertThat(members.next(), new IsRecord(follower1.getUuid(), 5001, Role.FOLLOWER, asSet("core", "core1")));
    assertThat(members.next(), new IsRecord(follower2.getUuid(), 5002, Role.FOLLOWER, asSet("core", "core2")));
    assertThat(members.next(), new IsRecord(replica4.getUuid(), 6004, Role.READ_REPLICA, asSet("replica", "replica4")));
    assertThat(members.next(), new IsRecord(replica5.getUuid(), 6005, Role.READ_REPLICA, asSet("replica", "replica5")));
    assertFalse(members.hasNext());
}