Package org.apache.helix.api.id

Examples of org.apache.helix.api.id.ControllerId

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    // read all the participants
    Map<ParticipantId, Participant> participantMap = readParticipants();

    // read the controllers
    Map<ControllerId, Controller> controllerMap = new HashMap<ControllerId, Controller>();
    ControllerId leaderId = null;
    if (leader != null) {
      leaderId = ControllerId.from(leader.getId());
      controllerMap.put(leaderId, new Controller(leaderId, leader, true));
    }
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    System.out.println("START " + clusterName + " at " + new Date(System.currentTimeMillis()));

    String zkAddr = ZK_ADDR;
    ClusterId clusterId = ClusterId.from(clusterName);
    ControllerId controllerId = ControllerId.from("controller");
    final ParticipantId participantId = ParticipantId.from("participant1");

    ResourceId resourceId = ResourceId.from("testDB");
    State master = State.from("MASTER");
    State slave = State.from("SLAVE");
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   * @return Controller snapshot, or null
   */
  public Controller readLeader() {
    LiveInstance leader = _accessor.getProperty(_keyBuilder.controllerLeader());
    if (leader != null) {
      ControllerId leaderId = ControllerId.from(leader.getId());
      return new Controller(leaderId, leader, true);
    }
    return null;
  }
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    // start auto-controller
    ClusterId clusterId = ClusterId.from(clusterName);
    final HelixAutoController[] controllers = new HelixAutoController[n];
    for (int i = 0; i < n; i++) {
      int port = 12918 + i;
      ControllerId controllerId = ControllerId.from("localhost_" + port);
      controllers[i] = connection.createAutoController(clusterId, controllerId);
      controllers[i].startAsync();
    }

    // check live-instance znode for localhost_12918/12919 exists
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    HelixConnection connection = new ZkHelixConnection(ZK_ADDR);
    connection.connect();

    // start controller
    ClusterId clusterId = ClusterId.from(clusterName);
    ControllerId controllerId = ControllerId.from("controller");
    HelixController controller = connection.createController(clusterId, controllerId);
    controller.startAsync();

    // check leader znode exists
    HelixDataAccessor accessor = connection.createDataAccessor(clusterId);
    PropertyKey.Builder keyBuilder = accessor.keyBuilder();
    LiveInstance leader = accessor.getProperty(keyBuilder.controllerLeader());
    Assert.assertNotNull(leader);
    Assert.assertEquals(leader.getInstanceName(), controllerId.stringify());

    // stop participant
    controller.stopAsync();

    // check leader znode is gone
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    HelixConnection connection = new ZkHelixConnection(ZK_ADDR);
    connection.connect();

    // start controller
    ClusterId clusterId = ClusterId.from(clusterName);
    final ControllerId controllerId = ControllerId.from("controller");

    // start controller
    HelixController controller = connection.createController(clusterId, controllerId);
    controller.startAsync();

    // check live-instance znode for localhost_12918 exists
    final HelixDataAccessor accessor =
        new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor<ZNRecord>(_gZkClient));
    final PropertyKey.Builder keyBuilder = accessor.keyBuilder();
    LiveInstance leader = accessor.getProperty(keyBuilder.controllerLeader());
    Assert.assertNotNull(leader);
    Assert.assertEquals(leader.getInstanceName(), controllerId.stringify());

    // remove leader znode externally
    accessor.removeProperty(keyBuilder.controllerLeader());

    // verify leader is re-elected
    boolean result = TestHelper.verify(new TestHelper.Verifier() {

      @Override
      public boolean verify() throws Exception {
        LiveInstance leader = accessor.getProperty(keyBuilder.controllerLeader());
        if (leader == null) {
          return false;
        }

        return leader.getInstanceName().equals(controllerId.stringify());
      }
    }, 3 * 1000);

    Assert.assertTrue(result, "Fail to re-elect a new leader");

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Related Classes of org.apache.helix.api.id.ControllerId

  • org.apache.helix.api.accessor.ClusterAccessor
  • org.apache.helix.api.accessor.ControllerAccessor
  • org.apache.helix.examples.LogicalModelExample
  • org.apache.helix.integration.TestHelixConnection
  • org.apache.helix.integration.TestLocalContainerProvider
  • org.apache.helix.manager.zk.TestZkHelixAutoController
  • org.apache.helix.manager.zk.TestZkHelixController
  • org.apache.helix.manager.zk.TestZkHelixMultiClusterController
  • org.apache.helix.provisioning.yarn.AppMasterLauncher
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