Package org.apache.helix

Examples of org.apache.helix.HelixController

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          StateModelDefId.from("OnlineOffline"), new TestHelixConnection.MockStateModelFactory());
      participants[i].start();
    }

    // Start the controller
    HelixController controller =
        connection.createController(ClusterId.from(clusterName), ControllerId.from("controller"));
    controller.start();
    Thread.sleep(500);

    // Verify balanced cluster
    boolean result =
        ClusterStateVerifier.verifyByZkCallback(new BestPossAndExtViewZkVerifier(_zkaddr,
            clusterName));
    Assert.assertTrue(result);

    // Drop a partition from the first participant
    HelixAdmin admin = connection.createClusterManagementTool();
    IdealState idealState = admin.getResourceIdealState(clusterName, RESOURCE_NAME);
    Map<ParticipantId, State> participantStateMap =
        idealState.getParticipantStateMap(PartitionId.from(RESOURCE_NAME + "_0"));
    participantStateMap.remove(ParticipantId.from("localhost_12918"));
    idealState.setParticipantStateMap(PartitionId.from(RESOURCE_NAME + "_0"), participantStateMap);
    admin.setResourceIdealState(clusterName, RESOURCE_NAME, idealState);
    Thread.sleep(1000);

    // Verify balanced cluster
    result =
        ClusterStateVerifier.verifyByZkCallback(new BestPossAndExtViewZkVerifier(_zkaddr,
            clusterName));
    Assert.assertTrue(result);

    // Drop a partition from the second participant
    participantStateMap = idealState.getParticipantStateMap(PartitionId.from(RESOURCE_NAME + "_1"));
    participantStateMap.remove(ParticipantId.from("localhost_12919"));
    idealState.setParticipantStateMap(PartitionId.from(RESOURCE_NAME + "_1"), participantStateMap);
    admin.setResourceIdealState(clusterName, RESOURCE_NAME, idealState);
    Thread.sleep(1000);

    // Verify balanced cluster
    result =
        ClusterStateVerifier.verifyByZkCallback(new BestPossAndExtViewZkVerifier(_zkaddr,
            clusterName));
    Assert.assertTrue(result);

    // Clean up
    controller.stop();
    for (HelixParticipant participant : participants) {
      participant.stop();
    }
    admin.dropCluster(clusterName);
    System.out.println("END " + clusterName + " at " + new Date(System.currentTimeMillis()));
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    // update the participant
    updateParticipant(participant, clusterId, connection);

    // start the controller
    ControllerId controllerId = ControllerId.from("exampleController");
    HelixController helixController = connection.createController(clusterId, controllerId);
    helixController.start();

    // start the specified participant
    HelixParticipant helixParticipant = connection.createParticipant(clusterId, participant.getId());
    helixParticipant.getStateMachineEngine().registerStateModelFactory(lockUnlock.getStateModelDefId(),
        new LockUnlockFactory());
    helixParticipant.start();

    // start another participant via auto join
    HelixParticipant autoJoinParticipant =
        connection.createParticipant(clusterId, ParticipantId.from("localhost_12120"));
    autoJoinParticipant.getStateMachineEngine().registerStateModelFactory(lockUnlock.getStateModelDefId(),
        new LockUnlockFactory());
    autoJoinParticipant.start();

    Thread.sleep(5000);
    printExternalView(connection, clusterId, resource.getId());

    // stop the participants
    helixParticipant.stop();
    autoJoinParticipant.stop();

    // stop the controller
    helixController.stop();

    // drop the cluster
    dropCluster(clusterId, connection);
    connection.disconnect();
  }
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    connection.connect();

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

    // 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.stop();

    // check leader znode is gone
    Assert.assertNull(accessor.getProperty(keyBuilder.controllerLeader()));

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

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

    // check live-instance znode for localhost_12918 exists
    final HelixDataAccessor accessor =
        new ZKHelixDataAccessor(clusterName, _baseAccessor);
    final PropertyKey.Builder keyBuilder = accessor.keyBuilder();
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    clusterAccessor.addResource(new ResourceConfig.Builder(resourceId).idealState(idealState)
        .build());
    clusterAccessor.addParticipant(new ParticipantConfig.Builder(participantId).build());

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

    // start participant
    HelixParticipant participant = connection.createParticipant(clusterId, participantId);
    participant.getStateMachineEngine().registerStateModelFactory(
        StateModelDefId.from("MasterSlave"), new MockStateModelFactory());

    participant.start();
    Thread.sleep(1000);

    // verify
    final HelixDataAccessor accessor = connection.createDataAccessor(clusterId);
    final PropertyKey.Builder keyBuilder = accessor.keyBuilder();
    boolean success = TestHelper.verify(new TestHelper.Verifier() {

      @Override
      public boolean verify() throws Exception {
        ExternalView externalView = accessor.getProperty(keyBuilder.externalView("testDB"));
        Map<ParticipantId, State> stateMap = externalView.getStateMap(PartitionId.from("testDB_0"));

        if (stateMap == null || !stateMap.containsKey(participantId)) {
          return false;
        }

        return stateMap.get(participantId).equals(State.from("MASTER"));
      }
    }, 10 * 1000);

    Assert.assertTrue(success);

    // clean up
    controller.stop();
    participant.stop();
    connection.disconnect();

    System.out.println("END " + clusterName + " at " + new Date(System.currentTimeMillis()));
  }
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  @Override
  public boolean isLeader() {
    boolean isLeader = false;
    switch (_role.getType()) {
    case CONTROLLER: {
      HelixController controller = (HelixController) _role;
      isLeader = controller.isLeader();
      break;
    }
    case CONTROLLER_PARTICIPANT: {
      HelixMultiClusterController multiClusterController = (HelixMultiClusterController) _role;
      isLeader = multiClusterController.isLeader();
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              .build();
      clusterAccessor.addResource(resourceConfig);
    }
    // start controller
    ControllerId controllerId = ControllerId.from("controller1");
    HelixController controller = connection.createController(clusterId, controllerId);
    controller.start();

    // Start any pre-specified jobs
    List<TaskConfig> taskConfigs = applicationSpec.getTaskConfigs();
    if (taskConfigs != null) {
      YarnConfiguration conf = new YarnConfiguration();
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    clusterAccessor.addResource(new ResourceConfig.Builder(ResourceId.from(resourceName))
        .provisionerConfig(provisionerConfig).idealState(idealStateBuilder.build()).build());

    // start controller
    ControllerId controllerId = ControllerId.from("controller1");
    HelixController controller = connection.createController(clusterId, controllerId);
    controller.start();

    latch.await(30000, TimeUnit.MILLISECONDS);

    // clean up
    controller.stop();
    connection.disconnect();

    Assert.assertEquals(allocated, MAX_PARTICIPANTS);
    Assert.assertEquals(started, MAX_PARTICIPANTS);
    Assert.assertEquals(stopped, MAX_PARTICIPANTS);
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    // update the participant
    updateParticipant(participant, clusterId, connection);

    // start the controller
    ControllerId controllerId = ControllerId.from("exampleController");
    HelixController helixController = connection.createController(clusterId, controllerId);
    helixController.startAsync();

    // start the specified participant
    HelixParticipant helixParticipant =
        connection.createParticipant(clusterId, participant.getId());
    helixParticipant.getStateMachineEngine().registerStateModelFactory(
        lockUnlock.getStateModelDefId(), new LockUnlockFactory());
    helixParticipant.startAsync();

    // start another participant via auto join
    HelixParticipant autoJoinParticipant =
        connection.createParticipant(clusterId, ParticipantId.from("localhost_12120"));
    autoJoinParticipant.getStateMachineEngine().registerStateModelFactory(
        lockUnlock.getStateModelDefId(), new LockUnlockFactory());
    autoJoinParticipant.startAsync();

    Thread.sleep(5000);
    printExternalView(connection, clusterId, resource.getId());

    // stop the participants
    helixParticipant.stopAsync();
    autoJoinParticipant.stopAsync();

    // stop the controller
    helixController.stopAsync();

    // drop the cluster
    dropCluster(clusterId, connection);
    connection.disconnect();
  }
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  @Override
  public boolean isLeader() {
    boolean isLeader = false;
    switch (_role.getType()) {
    case CONTROLLER:
      HelixController controller = (HelixController) _role;
      isLeader = controller.isLeader();
      break;
    case CONTROLLER_PARTICIPANT:
      HelixAutoController autoController = (HelixAutoController) _role;
      isLeader = autoController.isLeader();
      break;
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Related Classes of org.apache.helix.HelixController

  • org.apache.helix.examples.LogicalModelExample
  • org.apache.helix.integration.TestHelixConnection
  • org.apache.helix.integration.TestLocalContainerProvider
  • org.apache.helix.integration.TestSharedConnection
  • org.apache.helix.manager.zk.HelixConnectionAdaptor
  • org.apache.helix.manager.zk.TestZkHelixController
  • org.apache.helix.manager.zk.ZKHelixManager
  • org.apache.helix.provisioning.yarn.AppMasterLauncher
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