Package com.linkedin.helix.manager.zk

Examples of com.linkedin.helix.manager.zk.ZkClient

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  {
//    Logger.getRootLogger().setLevel(Level.INFO);
    System.out.println("START " + CLASS_NAME + " at "
        + new Date(System.currentTimeMillis()));

    _zkClient = new ZkClient(ZK_ADDR);
    _zkClient.setZkSerializer(new ZNRecordSerializer());
    String namespace = "/" + CLUSTER_NAME;
    if (_zkClient.exists(namespace))
    {
      _zkClient.deleteRecursive(namespace);
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  StringRepresentation getControllerRepresentation(String clusterName) throws JsonGenerationException,
      JsonMappingException,
      IOException
  {
    Builder keyBuilder = new PropertyKey.Builder(clusterName);
    ZkClient zkClient =
        (ZkClient) getContext().getAttributes().get(RestAdminApplication.ZKCLIENT);

    ZKHelixDataAccessor accessor =
        new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor<ZNRecord>(zkClient));
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  public void acceptRepresentation(Representation entity)
  {
    try
    {
      String clusterName = (String) getRequest().getAttributes().get("clusterName");
      ZkClient zkClient =
          (ZkClient) getContext().getAttributes().get(RestAdminApplication.ZKCLIENT);
      ClusterSetup setupTool = new ClusterSetup(zkClient);

      JsonParameters jsonParameters = new JsonParameters(entity);
      String command = jsonParameters.getCommand();
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    return presentation;
  }

  StringRepresentation getInstanceErrorsRepresentation( String clusterName, String instanceName) throws JsonGenerationException, JsonMappingException, IOException
  {
    ZkClient zkClient = (ZkClient)getContext().getAttributes().get(RestAdminApplication.ZKCLIENT);
    String instanceSessionId = ClusterRepresentationUtil.getInstanceSessionId(zkClient, clusterName, instanceName);
   
    String message = ClusterRepresentationUtil.getInstancePropertyNameListAsString(zkClient, clusterName, instanceName, PropertyType.CURRENTSTATES, instanceSessionId, MediaType.APPLICATION_JSON);

    StringRepresentation representation = new StringRepresentation(message, MediaType.APPLICATION_JSON);
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    AssertJUnit.assertTrue(_zkServer != null);

    // System.out.println("Number of open zkClient before ZkUnitTests: "
    // + ZkClient.getNumberOfConnections());

    _gZkClient = new ZkClient(ZK_ADDR);
    _gZkClient.setZkSerializer(new ZNRecordSerializer());
  }
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    try
    {
      JsonParameters jsonParameters = new JsonParameters(entity);
      String command = jsonParameters.getCommand();

      ZkClient zkClient =
          (ZkClient) getContext().getAttributes().get(RestAdminApplication.ZKCLIENT);
     
      if (command.equalsIgnoreCase(JsonParameters.ZK_DELETE_CHILDREN))
      {
        List<String> childNames = zkClient.getChildren(zkPath);
        if (childNames != null)
        {
          for (String childName : childNames)
          {
            String childPath = zkPath.equals("/")? "/" + childName : zkPath + "/" + childName;
            zkClient.deleteRecursive(childPath);
          }
        }
      }
      else
      {
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    StringRepresentation presentation = null;
    String zkPath = getZKPath();

    try
    {
      ZkClient zkClient =
          (ZkClient) getContext().getAttributes().get(RestAdminApplication.ZKCLIENT);
      ZNRecord result = readZkDataStatAndChild(zkPath, zkClient);

      presentation =
          new StringRepresentation(ClusterRepresentationUtil.ZNRecordToJson(result),
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  public void removeRepresentations()
  {
    String zkPath = getZKPath();
    try
    {
      ZkClient zkClient =
          (ZkClient) getContext().getAttributes().get(RestAdminApplication.ZKCLIENT);
      zkClient.deleteRecursive(zkPath);
     
      getResponse().setStatus(Status.SUCCESS_OK);
    }
    catch (Exception e)
    {
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                                                             String instanceName,
                                                             String resourceGroup) throws JsonGenerationException,
      JsonMappingException,
      IOException
  {
    ZkClient zkClient = (ZkClient)getContext().getAttributes().get(RestAdminApplication.ZKCLIENT);
 
    String instanceSessionId =
        ClusterRepresentationUtil.getInstanceSessionId(zkClient,
                                                       clusterName,
                                                       instanceName);
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  public static ZkClient getZkClient(String zkServer)
  {
    // happy path that we cache the zkclient and it's still connected
    if (_zkClientMap.containsKey(zkServer))
    {
      ZkClient zkClient = _zkClientMap.get(zkServer);
      if (zkClient.getConnection().getZookeeperState() == States.CONNECTED)
      {
        return zkClient;
      }
    }

    synchronized (_zkClientMap)
    {
      // if we cache a stale zkclient, purge it
      if (_zkClientMap.containsKey(zkServer))
      {
        ZkClient zkClient = _zkClientMap.get(zkServer);
        if (zkClient.getConnection().getZookeeperState() != States.CONNECTED)
        {
          _zkClientMap.remove(zkServer);
        }
      }

      // get a new zkclient
      if (!_zkClientMap.containsKey(zkServer))
      {
        ZkClient zkClient = new ZkClient(zkServer, DEFAULT_SESSION_TIMEOUT,
            ZkClient.DEFAULT_CONNECTION_TIMEOUT, new ZNRecordSerializer());

        _zkClientMap.put(zkServer, zkClient);
      }
      return _zkClientMap.get(zkServer);
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Related Classes of com.linkedin.helix.manager.zk.ZkClient

  • com.linkedin.helix.controller.restlet.ZKPropertyTransferServer
  • com.linkedin.helix.controller.TestControllerRebalancingTimer
  • com.linkedin.helix.controller.TestControllerRebalancingTimerPeriod
  • com.linkedin.helix.examples.IdealStateExample
  • com.linkedin.helix.healthcheck.TestAddDropAlert
  • com.linkedin.helix.healthcheck.TestExpandAlert
  • com.linkedin.helix.healthcheck.TestSimpleAlert
  • com.linkedin.helix.healthcheck.TestSimpleWildcardAlert
  • com.linkedin.helix.healthcheck.TestStalenessAlert
  • com.linkedin.helix.healthcheck.TestWildcardAlert
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