Package org.apache.helix.manager.zk

Examples of org.apache.helix.manager.zk.ZkClient

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                                  int replica,
                                  String stateModelDef,
                                  IdealStateModeProperty mode,
                                  boolean doRebalance) throws Exception
  {
    ZkClient zkClient = new ZkClient(ZkAddr);
    if (zkClient.exists("/" + clusterName))
    {
      LOG.warn("Cluster already exists:" + clusterName + ". Deleting it");
      zkClient.deleteRecursive("/" + clusterName);
    }

    ClusterSetup setupTool = new ClusterSetup(ZkAddr);
    setupTool.addCluster(clusterName, true);

    for (int i = 0; i < nodesNb; i++)
    {
      int port = startPort + i;
      setupTool.addInstanceToCluster(clusterName, participantNamePrefix + ":" + port);
    }

    for (int i = 0; i < resourceNb; i++)
    {
      String dbName = resourceNamePrefix + i;
      setupTool.addResourceToCluster(clusterName, dbName, partitionNb, stateModelDef, mode.toString());
      if (doRebalance)
      {
        setupTool.rebalanceStorageCluster(clusterName, dbName, replica);
      }
    }
    zkClient.close();
  }
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  public void testSyncZkBaseDataAccessor()
  {
    System.out.println("START TestZkBaseDataAccessor.sync at " + new Date(System.currentTimeMillis()));

    String root = "TestZkBaseDataAccessor_syn";
    ZkClient zkClient = new ZkClient(ZK_ADDR);
    zkClient.setZkSerializer(new ZNRecordSerializer());
    zkClient.deleteRecursive("/" + root);

    BaseDataAccessor<ZNRecord> accessor = new ZkBaseDataAccessor<ZNRecord>(zkClient);

    // test sync create
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_0", msgId);
      boolean success = accessor.create(path, new ZNRecord(msgId), AccessOption.PERSISTENT);
      Assert.assertTrue(success, "Should succeed in create");
    }

    // test get what we created
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_0", msgId);
      ZNRecord record = zkClient.readData(path);
      Assert.assertEquals(record.getId(), msgId, "Should get what we created");
    }

    // test sync set
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_0", msgId);
      ZNRecord newRecord = new ZNRecord(msgId);
      newRecord.setSimpleField("key1", "value1");
      boolean success = accessor.set(path, newRecord, AccessOption.PERSISTENT);
      Assert.assertTrue(success, "Should succeed in set");
    }

    // test get what we set
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_0", msgId);
      ZNRecord record = zkClient.readData(path);
      Assert.assertEquals(record.getSimpleFields().size(), 1, "Should have 1 simple field set");
      Assert.assertEquals(record.getSimpleField("key1"), "value1", "Should have value1 set");
    }
   
    // test sync update
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_0", msgId);
      ZNRecord newRecord = new ZNRecord(msgId);
      newRecord.setSimpleField("key2", "value2");
      boolean success = accessor.update(path, new ZNRecordUpdater(newRecord), AccessOption.PERSISTENT);
      Assert.assertTrue(success, "Should succeed in update");
    }

    // test get what we updated
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_0", msgId);
      ZNRecord record = zkClient.readData(path);
      Assert.assertEquals(record.getSimpleFields().size(), 2, "Should have 2 simple fields set");
      Assert.assertEquals(record.getSimpleField("key2"), "value2", "Should have value2 set");
    }
   
    // test sync get
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_0", msgId);
      ZNRecord record = accessor.get(path, null, 0);
      Assert.assertEquals(record.getSimpleFields().size(), 2, "Should have 2 simple fields set");
      Assert.assertEquals(record.getSimpleField("key1"), "value1", "Should have value1 set");
      Assert.assertEquals(record.getSimpleField("key2"), "value2", "Should have value2 set");
    }

    // test sync exist
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_0", msgId);
      boolean exists = accessor.exists(path, 0);
      Assert.assertTrue(exists, "Should exist");
    }

    // test getStat()
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_0", msgId);
      Stat stat = accessor.getStat(path, 0);
      Assert.assertNotNull(stat, "Stat should exist");
      Assert.assertEquals(stat.getVersion(), 2, "DataVersion should be 2, since we set 1 and update 1");
    }

    // test sync remove
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_0", msgId);
      boolean success = accessor.remove(path, 0);
      Assert.assertTrue(success, "Should remove");
    }
   
    // test get what we removed
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_0", msgId);
      boolean exists = zkClient.exists(path);
      Assert.assertFalse(exists, "Should be removed");
    }

    zkClient.close();
    System.out.println("END TestZkBaseDataAccessor.sync at " + new Date(System.currentTimeMillis()));
  }
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  public static void verifyState(String clusterName,
                                 String zkAddr,
                                 Map<String, Set<String>> stateMap,
                                 String state)
  {
    ZkClient zkClient = new ZkClient(zkAddr);
    zkClient.setZkSerializer(new ZNRecordSerializer());

    try
    {
      ZKHelixDataAccessor accessor =
          new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor(zkClient));
      Builder keyBuilder = accessor.keyBuilder();

      for (String resGroupPartitionKey : stateMap.keySet())
      {
        Map<String, String> retMap = getResourceAndPartitionKey(resGroupPartitionKey);
        String resGroup = retMap.get("RESOURCE");
        String partitionKey = retMap.get("PARTITION");

        ExternalView extView = accessor.getProperty(keyBuilder.externalView(resGroup));
        for (String instance : stateMap.get(resGroupPartitionKey))
        {
          String actualState = extView.getStateMap(partitionKey).get(instance);
          Assert.assertNotNull(actualState, "externalView doesn't contain state for "
              + resGroup + "/" + partitionKey + " on " + instance + " (expect " + state
              + ")");

          Assert.assertEquals(actualState, state, "externalView for " + resGroup + "/"
              + partitionKey + " on " + instance + " is " + actualState + " (expect "
              + state + ")");
        }
      }
    }
    finally
    {
      zkClient.close();
    }
  }
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  public void testAsyncZkBaseDataAccessor()
  {
    System.out.println("START TestZkBaseDataAccessor.async at " + new Date(System.currentTimeMillis()));

    String root = "TestZkBaseDataAccessor_asyn";
    ZkClient zkClient = new ZkClient(ZK_ADDR);
    zkClient.setZkSerializer(new ZNRecordSerializer());
    zkClient.deleteRecursive("/" + root);

    ZkBaseDataAccessor<ZNRecord> accessor = new ZkBaseDataAccessor<ZNRecord>(zkClient);
   
    // test async createChildren
    String parentPath = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1");
    List<ZNRecord> records = new ArrayList<ZNRecord>();
    List<String> paths = new  ArrayList<String>();
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      paths.add(PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1",msgId));
      records.add(new ZNRecord(msgId));
    }
    boolean[] success = accessor.createChildren(paths, records, AccessOption.PERSISTENT);
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      Assert.assertTrue(success[i], "Should succeed in create " + msgId);
    }

    // test get what we created
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId);
      ZNRecord record = zkClient.readData(path);
      Assert.assertEquals(record.getId(), msgId, "Should get what we created");
    }

    // test async setChildren
    parentPath = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1");
    records = new ArrayList<ZNRecord>();
    paths = new  ArrayList<String>();
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      paths.add(PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1",msgId));
      ZNRecord newRecord = new ZNRecord(msgId);
      newRecord.setSimpleField("key1", "value1");
      records.add(newRecord);
    }
    success = accessor.setChildren(paths, records, AccessOption.PERSISTENT);
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      Assert.assertTrue(success[i], "Should succeed in set " + msgId);
    }

    // test get what we set
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId);
      ZNRecord record = zkClient.readData(path);
      Assert.assertEquals(record.getSimpleFields().size(), 1, "Should have 1 simple field set");
      Assert.assertEquals(record.getSimpleField("key1"), "value1", "Should have value1 set");
    }
   
    // test async updateChildren
    parentPath = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1");
//    records = new ArrayList<ZNRecord>();
    List<DataUpdater<ZNRecord>> znrecordUpdaters = new ArrayList<DataUpdater<ZNRecord>>();
    paths = new ArrayList<String>();
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      paths.add(PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1",msgId));
      ZNRecord newRecord = new ZNRecord(msgId);
      newRecord.setSimpleField("key2", "value2");
//      records.add(newRecord);
      znrecordUpdaters.add(new ZNRecordUpdater(newRecord));
    }
    success = accessor.updateChildren(paths, znrecordUpdaters, AccessOption.PERSISTENT);
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      Assert.assertTrue(success[i], "Should succeed in update " + msgId);
    }

    // test get what we updated
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId);
      ZNRecord record = zkClient.readData(path);
      Assert.assertEquals(record.getSimpleFields().size(), 2, "Should have 2 simple fields set");
      Assert.assertEquals(record.getSimpleField("key2"), "value2", "Should have value2 set");
    }

    // test async getChildren
    parentPath = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1");
    records = accessor.getChildren(parentPath, null, 0);
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      ZNRecord record = records.get(i);
      Assert.assertEquals(record.getId(), msgId, "Should get what we updated");
      Assert.assertEquals(record.getSimpleFields().size(), 2, "Should have 2 simple fields set");
      Assert.assertEquals(record.getSimpleField("key2"), "value2", "Should have value2 set");
    }

    // test async exists
    parentPath = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1");
    paths = new ArrayList<String>();
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      paths.add(PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId));
    }
    boolean[] exists = accessor.exists(paths, 0);
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      Assert.assertTrue(exists[i], "Should exist " + msgId);
    }

    // test async getStats
    parentPath = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1");
    paths = new ArrayList<String>();
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      paths.add(PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId));
    }
    Stat[] stats = accessor.getStats(paths, 0);
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      Assert.assertNotNull(stats[i], "Stat should exist for " + msgId);
      Assert.assertEquals(stats[i].getVersion(), 2, "DataVersion should be 2, since we set 1 and update 1 for " + msgId);
    }

    // test async remove
    parentPath = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1");
    paths = new ArrayList<String>();
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      paths.add(PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId));
    }
    success = accessor.remove(paths, 0);
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      Assert.assertTrue(success[i], "Should succeed in remove " + msgId);
    }
   
    // test get what we removed
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId);
      boolean pathExists = zkClient.exists(path);
      Assert.assertFalse(pathExists, "Should be removed " + msgId);
    }

    zkClient.close();
    System.out.println("END TestZkBaseDataAccessor.async at " + new Date(System.currentTimeMillis()));
  }
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    _stateModelFty = new GenericLeaderStandbyStateModelFactory(_callback, _notificationTypes);

    StateMachineEngine stateMach = _manager.getStateMachineEngine();
    stateMach.registerStateModelFactory(LEADER_STANDBY, _stateModelFty, _resourceName);
    ZkClient zkClient = null;
    try
    {
      // manually add ideal state for participant leader using LeaderStandby
      // model

      zkClient = new ZkClient(_zkAddr, ZkClient.DEFAULT_CONNECTION_TIMEOUT);
      zkClient.setZkSerializer(new ZNRecordSerializer());
      HelixDataAccessor accessor = new ZKHelixDataAccessor(_manager.getClusterName(), new ZkBaseDataAccessor(zkClient));
      Builder keyBuilder = accessor.keyBuilder();

      IdealState idealState = new IdealState(_resourceName);
      idealState.setIdealStateMode(IdealStateModeProperty.AUTO.toString());
      idealState.setReplicas(StateModelToken.ANY_LIVEINSTANCE.toString());
      idealState.setNumPartitions(1);
      idealState.setStateModelDefRef(LEADER_STANDBY);
      idealState.setStateModelFactoryName(_resourceName);
      List<String> prefList = new ArrayList<String>(Arrays.asList(StateModelToken.ANY_LIVEINSTANCE
          .toString()));
      idealState.getRecord().setListField(_resourceName + "_0", prefList);

      List<String> idealStates = accessor.getChildNames(keyBuilder.idealStates());
      while (idealStates == null || !idealStates.contains(_resourceName))
      {
        accessor.setProperty(keyBuilder.idealStates(_resourceName), idealState);
        idealStates = accessor.getChildNames(keyBuilder.idealStates());
      }

      LOG.info("Set idealState for participantLeader:" + _resourceName + ", idealState:"
          + idealState);
    } finally
    {
      if (zkClient != null && zkClient.getConnection() != null)

      {
        zkClient.close();
      }
    }

  }
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  StringRepresentation getHostedEntitiesRepresentation(String clusterName) throws JsonGenerationException,
      JsonMappingException,
      IOException
  {
    ZkClient zkClient =
        (ZkClient) getContext().getAttributes().get(RestAdminApplication.ZKCLIENT);
    ;
    ClusterSetup setupTool = new ClusterSetup(zkClient);
    List<String> hostedEntities =
        setupTool.getClusterManagementTool().getResourcesInCluster(clusterName);
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        if (jsonParameters.getParameter(JsonParameters.IDEAL_STATE_MODE) != null)
        {
          mode = jsonParameters.getParameter(JsonParameters.IDEAL_STATE_MODE);
        }

        ZkClient zkClient =
            (ZkClient) getContext().getAttributes().get(RestAdminApplication.ZKCLIENT);
        ;
        ClusterSetup setupTool = new ClusterSetup(zkClient);
        setupTool.addResourceToCluster(clusterName,
                                       entityName,
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    String className = getShortClassName();
    System.out.println("START testZNRecordSizeLimitUseZNRecordSerializer at "
        + new Date(System.currentTimeMillis()));

    ZNRecordSerializer serializer = new ZNRecordSerializer();
    ZkClient zkClient = new ZkClient(ZK_ADDR);
    zkClient.setZkSerializer(serializer);
    String root = className;
    byte[] buf = new byte[1024];
    for (int i = 0; i < 1024; i++)
    {
      buf[i] = 'a';
    }
    String bufStr = new String(buf);

    // test zkClient
    // legal-sized data gets written to zk
    // write a znode of size less than 1m
    final ZNRecord smallRecord = new ZNRecord("normalsize");
    smallRecord.getSimpleFields().clear();
    for (int i = 0; i < 900; i++)
    {
      smallRecord.setSimpleField(i + "", bufStr);
    }

    String path1 = "/" + root + "/test1";
    zkClient.createPersistent(path1, true);
    zkClient.writeData(path1, smallRecord);

    ZNRecord record = zkClient.readData(path1);
    Assert.assertTrue(serializer.serialize(record).length > 900 * 1024);

    // oversized data doesn't create any data on zk
    // prepare a znode of size larger than 1m
    final ZNRecord largeRecord = new ZNRecord("oversize");
    largeRecord.getSimpleFields().clear();
    for (int i = 0; i < 1024; i++)
    {
      largeRecord.setSimpleField(i + "", bufStr);
    }
    String path2 = "/" + root + "/test2";
    zkClient.createPersistent(path2, true);
    try
    {
      zkClient.writeData(path2, largeRecord);
      Assert.fail("Should fail because data size is larger than 1M");
    }
    catch (HelixException e)
    {
      // OK
    }
    record = zkClient.readData(path2);
    Assert.assertNull(record);

    // oversized write doesn't overwrite existing data on zk
    record = zkClient.readData(path1);
    try
    {
      zkClient.writeData(path1, largeRecord);
      Assert.fail("Should fail because data size is larger than 1M");
    }
    catch (HelixException e)
    {
      // OK
    }
    ZNRecord recordNew = zkClient.readData(path1);
    byte[] arr = serializer.serialize(record);
    byte[] arrNew = serializer.serialize(recordNew);
    Assert.assertTrue(Arrays.equals(arr, arrNew));

    // test ZkDataAccessor
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    String className = getShortClassName();
    System.out.println("START testZNRecordSizeLimitUseZNRecordStreamingSerializer at "
        + new Date(System.currentTimeMillis()));

    ZNRecordStreamingSerializer serializer = new ZNRecordStreamingSerializer();
    ZkClient zkClient = new ZkClient(ZK_ADDR);
    zkClient.setZkSerializer(serializer);
    String root = className;
    byte[] buf = new byte[1024];
    for (int i = 0; i < 1024; i++)
    {
      buf[i] = 'a';
    }
    String bufStr = new String(buf);

    // test zkClient
    // legal-sized data gets written to zk
    // write a znode of size less than 1m
    final ZNRecord smallRecord = new ZNRecord("normalsize");
    smallRecord.getSimpleFields().clear();
    for (int i = 0; i < 900; i++)
    {
      smallRecord.setSimpleField(i + "", bufStr);
    }

    String path1 = "/" + root + "/test1";
    zkClient.createPersistent(path1, true);
    zkClient.writeData(path1, smallRecord);

    ZNRecord record = zkClient.readData(path1);
    Assert.assertTrue(serializer.serialize(record).length > 900 * 1024);

    // oversized data doesn't create any data on zk
    // prepare a znode of size larger than 1m
    final ZNRecord largeRecord = new ZNRecord("oversize");
    largeRecord.getSimpleFields().clear();
    for (int i = 0; i < 1024; i++)
    {
      largeRecord.setSimpleField(i + "", bufStr);
    }
    String path2 = "/" + root + "/test2";
    zkClient.createPersistent(path2, true);
    try
    {
      zkClient.writeData(path2, largeRecord);
      Assert.fail("Should fail because data size is larger than 1M");
    }
    catch (HelixException e)
    {
      // OK
    }
    record = zkClient.readData(path2);
    Assert.assertNull(record);

    // oversized write doesn't overwrite existing data on zk
    record = zkClient.readData(path1);
    try
    {
      zkClient.writeData(path1, largeRecord);
      Assert.fail("Should fail because data size is larger than 1M");
    }
    catch (HelixException e)
    {
      // OK
    }
    ZNRecord recordNew = zkClient.readData(path1);
    byte[] arr = serializer.serialize(record);
    byte[] arrNew = serializer.serialize(recordNew);
    Assert.assertTrue(Arrays.equals(arr, arrNew));

    // test ZkDataAccessor
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  }

  @BeforeClass()
  public void beforeClass() throws Exception
  {
    ZkClient zkClient = null;
    try
    {
      zkClient = new ZkClient(ZK_ADDR);
      zkClient.setZkSerializer(new ZNRecordSerializer());
      if (zkClient.exists("/" + clusterName))
      {
        zkClient.deleteRecursive("/" + clusterName);
      }
    }
    finally
    {
      if (zkClient != null)
      {
        zkClient.close();
      }
    }

    ClusterSetup.processCommandLineArgs(getArgs("-zkSvr",
                                                ZK_ADDR,
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