Package org.apache.helix.api.accessor

Examples of org.apache.helix.api.accessor.ClusterAccessor

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    String methodName = TestHelper.getTestMethodName();
    String testName = className + "_" + methodName;

    System.out.println("START " + testName + " at " + new Date(System.currentTimeMillis()));

    ClusterAccessor clusterAccessor = new ClusterAccessor(_clusterId, _dataAccessor);
    Cluster cluster = clusterAccessor.readCluster();

    ResourceId resourceId = ResourceId.from("TestDB0");
    Resource resource = cluster.getResource(resourceId);
    ResourceCurrentState currentStateOutput = new ResourceCurrentState();
    ResourceAssignment semiAutoResult =
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        if (!idealStates.containsKey(resource)) {
          idealStates.put(resource, new IdealState(resource));
        }
      }

      ClusterAccessor clusterAccessor = new ClusterAccessor(ClusterId.from(clusterName), accessor);
      Cluster cluster = clusterAccessor.readCluster();
      // calculate best possible state
      BestPossibleStateOutput bestPossOutput =
          ClusterStateVerifier.calcBestPossState(cluster, resources);

      // set error states
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    addStateModels(accessor);

    // refresh the cache
    ClusterEvent event = new ClusterEvent("testEvent");
    ClusterId clusterId = new ClusterId("sampleClusterId");
    ClusterAccessor clusterAccessor = new MockClusterAccessor(clusterId, accessor);
    Cluster cluster = clusterAccessor.readCluster();
    event.addAttribute("Cluster", cluster);
    event.addAttribute(AttributeName.IDEAL_STATE_RULES.toString(),
        clusterConfiguration.getIdealStateRules());

    // run resource computation
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    addStateModels(accessor);

    // refresh the cache
    ClusterEvent event = new ClusterEvent("testEvent");
    ClusterId clusterId = new ClusterId("sampleClusterId");
    ClusterAccessor clusterAccessor = new MockClusterAccessor(clusterId, accessor);
    Cluster cluster = clusterAccessor.readCluster();
    event.addAttribute("Cluster", cluster);
    Map<String, Map<String, String>> emptyMap = Maps.newHashMap();
    event.addAttribute(AttributeName.IDEAL_STATE_RULES.toString(), emptyMap);

    // run resource computation
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    addStateModels(accessor);

    // refresh the cache
    ClusterEvent event = new ClusterEvent("testEvent");
    ClusterId clusterId = new ClusterId("sampleClusterId");
    ClusterAccessor clusterAccessor = new MockClusterAccessor(clusterId, accessor);
    Cluster cluster = clusterAccessor.readCluster();
    event.addAttribute("Cluster", cluster);
    Map<String, Map<String, String>> emptyMap = Maps.newHashMap();
    event.addAttribute(AttributeName.IDEAL_STATE_RULES.toString(), emptyMap);

    // run resource computation
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  }

  public void setNumContainers(String appName, String serviceName, int numContainers) {
    ResourceId resourceId = ResourceId.from(serviceName);

    ClusterAccessor clusterAccessor = _connection.createClusterAccessor(ClusterId.from(appName));
    Resource resource = clusterAccessor.readResource(resourceId);
    LOG.info("Current provisioner config:" + resource.getProvisionerConfig());

    ResourceConfig.Delta delta = new ResourceConfig.Delta(resourceId);
    YarnProvisionerConfig config = new YarnProvisionerConfig(resourceId);
    config.setNumContainers(numContainers);
    delta.setProvisionerConfig(config);
    delta.setIdealState(resource.getIdealState());
    ResourceConfig updatedResourceConfig = clusterAccessor.updateResource(resourceId, delta);
    LOG.info("Update provisioner config:" + updatedResourceConfig.getProvisionerConfig());

  }
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    _connection.connect();
  }

  public void stopContainer(String appName, String participantName) throws Exception {
    ClusterId clusterId = ClusterId.from(appName);
    ClusterAccessor clusterAccessor = _connection.createClusterAccessor(clusterId);
    HelixDataAccessor dataAccessor = _connection.createDataAccessor(clusterId);
    ParticipantId participantId = ParticipantId.from(participantName);
    Participant participant = clusterAccessor.readParticipant(participantId);
    if (participant != null && participant.isAlive()) {
      Message message = new Message(MessageType.SHUTDOWN, UUID.randomUUID().toString());
      message.setTgtName(participant.getId().toString());
      message.setTgtSessionId(participant.getLiveInstance().getSessionId());
      message.setMsgId(message.getId());
      dataAccessor.createProperty(
          dataAccessor.keyBuilder().message(participant.getId().toString(), message.getId()),
          message);
      do {
        participant = clusterAccessor.readParticipant(participantId);
        Thread.sleep(1000);
        LOG.info("Waiting for container:" + participantName + " to shutdown");
      } while (participant != null && participant.isAlive());
    }
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    // create connection
    HelixConnection connection = new ZkHelixConnection(_zkaddr);
    connection.connect();

    // setup cluster
    ClusterAccessor clusterAccessor = connection.createClusterAccessor(clusterId);
    clusterAccessor.dropCluster();

    StateModelDefinition stateModelDef =
        new StateModelDefinition.Builder(stateModelDefId).addState(master, 1).addState(slave, 2)
            .addState(offline, 3).addState(dropped).addTransition(offline, slave, 3)
            .addTransition(slave, offline, 4).addTransition(slave, master, 2)
            .addTransition(master, slave, 1).addTransition(offline, dropped).initialState(offline)
            .upperBound(master, 1).dynamicUpperBound(slave, "R").build();
    PartitionId partition0 = PartitionId.from(resourceId, "0");
    AutoModeISBuilder idealStateBuilder = new AutoModeISBuilder(resourceId).add(partition0);
    idealStateBuilder.setNumReplica(1).setStateModelDefId(stateModelDefId);
    idealStateBuilder.assignPreferenceList(partition0, participantId);
    IdealState idealState = idealStateBuilder.build();
    clusterAccessor.createCluster(new ClusterConfig.Builder(clusterId).addStateModelDefinition(
        stateModelDef).build());
    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();
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  String generateReport(HelixConnection connection, ClusterId clusterId) {
    if (!connection.isConnected()) {
      return "Unable to connect to cluster";
    }
    StringBuilder builder = new StringBuilder();
    ClusterAccessor clusterAccessor = connection.createClusterAccessor(clusterId);
    Cluster cluster = clusterAccessor.readCluster();
    Map<ParticipantId, Participant> participants = cluster.getParticipantMap();
    builder.append("AppName").append(TAB).append(clusterId).append(NEWLINE);
    Map<ResourceId, Resource> resources = cluster.getResourceMap();
    for (ResourceId resourceId : resources.keySet()) {
      builder.append("SERVICE").append(TAB).append(resourceId).append(NEWLINE);
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    return new ZkHelixMultiClusterController(this, clusterId, controllerId);
  }

  @Override
  public ClusterAccessor createClusterAccessor(ClusterId clusterId) {
    return new ClusterAccessor(clusterId, createDataAccessor(clusterId));
  }
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Related Classes of org.apache.helix.api.accessor.ClusterAccessor

  • org.apache.helix.api.Cluster
  • org.apache.helix.api.config.ClusterConfig
  • org.apache.helix.api.config.ContainerConfig
  • org.apache.helix.api.config.ParticipantConfig
  • org.apache.helix.api.config.ResourceConfig
  • org.apache.helix.api.config.UserConfig
  • org.apache.helix.api.Controller
  • org.apache.helix.api.id.ControllerId
  • org.apache.helix.api.id.ParticipantId
  • org.apache.helix.api.id.ResourceId
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