Package com.linkedin.helix

Examples of com.linkedin.helix.ZNRecord

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

      presentation =
          new StringRepresentation(ClusterRepresentationUtil.ZNRecordToJson(result),
                                   MediaType.APPLICATION_JSON);
    }
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    return presentation;
  }

  private ZNRecord readZkDataStatAndChild(String zkPath, ZkClient zkClient)
  {
    ZNRecord result = null;

    // read data and stat
    Stat stat = new Stat();
    ZNRecord data = zkClient.readDataAndStat(zkPath, stat, true);
    if (data != null)
    {
      result = data;
    }
    else
    {
      result = new ZNRecord("");
    }
    result.setSimpleField("zkPath", zkPath);
    result.setSimpleField("stat", stat.toString());
    result.setSimpleField("numChildren", "" + stat.getNumChildren());
    result.setSimpleField("ctime", "" + new Date(stat.getCtime()));
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    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>();
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      path =
          PropertyPathConfig.getPath(PropertyType.CONFIGS,
                                     clusterName,
                                     ConfigScopeProperty.CLUSTER.toString(),
                                     clusterName);
      _store.setProperty(path, new ZNRecord(clusterName));
      path =
          PropertyPathConfig.getPath(PropertyType.CONFIGS,
                                     clusterName,
                                     ConfigScopeProperty.PARTICIPANT.toString());
      _store.createPropertyNamespace(path);
      path =
          PropertyPathConfig.getPath(PropertyType.CONFIGS,
                                     clusterName,
                                     ConfigScopeProperty.RESOURCE.toString());
      _store.createPropertyNamespace(path);

      // PROPERTY STORE
      path = PropertyPathConfig.getPath(PropertyType.PROPERTYSTORE, clusterName);
      _store.createPropertyNamespace(path);

      _store.createPropertyNamespace(HelixUtil.getLiveInstancesPath(clusterName));
      _store.createPropertyNamespace(HelixUtil.getMemberInstancesPath(clusterName));
      _store.createPropertyNamespace(HelixUtil.getExternalViewPath(clusterName));
      _store.createPropertyNamespace(HelixUtil.getStateModelDefinitionPath(clusterName));

      StateModelConfigGenerator generator = new StateModelConfigGenerator();
      addStateModelDef(clusterName,
                       "MasterSlave",
                       new StateModelDefinition(generator.generateConfigForMasterSlave()));

      // controller
      _store.createPropertyNamespace(HelixUtil.getControllerPath(clusterName));
      path = PropertyPathConfig.getPath(PropertyType.HISTORY, clusterName);
      final ZNRecord emptyHistory = new ZNRecord(PropertyType.HISTORY.toString());
      final List<String> emptyList = new ArrayList<String>();
      emptyHistory.setListField(clusterName, emptyList);
      _store.setProperty(path, emptyHistory);

      path = PropertyPathConfig.getPath(PropertyType.MESSAGES_CONTROLLER, clusterName);
      _store.createPropertyNamespace(path);
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                                      + "instanceNr:" + instanceNames.size()
                                      + ", replicas:" + replicas);
    }
    else if(partitions < instanceNames.size())
    {
      ZNRecord idealState = IdealStateCalculatorByShuffling.calculateIdealState(instanceNames, partitions, replicas, resourceName, 12345, masterStateValue, slaveStateValue);
      int i = 0;
      for(String partitionId : idealState.getMapFields().keySet())
      {
        Map<String, String> partitionAssignmentMap = idealState.getMapField(partitionId);
        List<String> partitionAssignmentPriorityList = new ArrayList<String>();
        String masterInstance = "";
        for(String instanceName : partitionAssignmentMap.keySet())
        {
          if(partitionAssignmentMap.get(instanceName).equalsIgnoreCase(masterStateValue)
              && masterInstance.equals(""))
          {
            masterInstance = instanceName;
          }
          else
          {
            partitionAssignmentPriorityList.add(instanceName);
          }
        }
        Collections.shuffle(partitionAssignmentPriorityList, new Random(i++));
        partitionAssignmentPriorityList.add(0, masterInstance);
        idealState.setListField(partitionId, partitionAssignmentPriorityList);
      }
      return idealState;
    }

    Map<String, Object> result = calculateInitialIdealState(instanceNames, partitions, replicas);
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    Map<String, Map<String, List<Integer>>> nodeSlaveAssignmentMap
        = (Map<String, Map<String, List<Integer>>>)(result.get(_SlaveAssignmentMap));

    int partitions = (Integer)(result.get("partitions"));

    ZNRecord idealState = new ZNRecord(resourceName);
    idealState.setSimpleField(IdealStateProperty.NUM_PARTITIONS.toString(), String.valueOf(partitions));


    for(String instanceName : nodeMasterAssignmentMap.keySet())
    {
      for(Integer partitionId : nodeMasterAssignmentMap.get(instanceName))
      {
        String partitionName = resourceName+"_"+partitionId;
        if(!idealState.getMapFields().containsKey(partitionName))
        {
          idealState.setMapField(partitionName, new TreeMap<String, String>());
        }
        idealState.getMapField(partitionName).put(instanceName, masterStateValue);
      }
    }

    for(String instanceName : nodeSlaveAssignmentMap.keySet())
    {
      Map<String, List<Integer>> slaveAssignmentMap = nodeSlaveAssignmentMap.get(instanceName);

      for(String slaveNode: slaveAssignmentMap.keySet())
      {
        List<Integer> slaveAssignment = slaveAssignmentMap.get(slaveNode);
        for(Integer partitionId: slaveAssignment)
        {
          String partitionName = resourceName+"_"+partitionId;
          idealState.getMapField(partitionName).put(slaveNode, slaveStateValue);
        }
      }
    }
    // generate the priority list of instances per partition. Master should be at front and slave follows.

    for(String partitionId : idealState.getMapFields().keySet())
    {
      Map<String, String> partitionAssignmentMap = idealState.getMapField(partitionId);
      List<String> partitionAssignmentPriorityList = new ArrayList<String>();
      String masterInstance = "";
      for(String instanceName : partitionAssignmentMap.keySet())
      {
        if(partitionAssignmentMap.get(instanceName).equalsIgnoreCase(masterStateValue)
            && masterInstance.equals(""))
        {
          masterInstance = instanceName;
        }
        else
        {
          partitionAssignmentPriorityList.add(instanceName);
        }
      }
      Collections.shuffle(partitionAssignmentPriorityList);
      partitionAssignmentPriorityList.add(0, masterInstance);
      idealState.setListField(partitionId, partitionAssignmentPriorityList);
    }
    assert(result.containsKey("replicas"));
    idealState.setSimpleField(IdealStateProperty.REPLICAS.toString(), result.get("replicas").toString());
    return idealState;
  }
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    List<TestCommand> commandList = new ArrayList<TestCommand>();
    for (int i = 0; i < testInfo._numDb; i++)
    {
      String dbName = TEST_DB_PREFIX + i;
      ZNRecord destIS = IdealStateCalculatorForStorageNode.calculateIdealState(instanceNames,
          testInfo._numPartitionsPerDb, testInfo._replica - 1, dbName, "MASTER", "SLAVE");
      // destIS.setId(dbName);
      destIS.setSimpleField(IdealStateProperty.IDEAL_STATE_MODE.toString(),
          IdealStateModeProperty.CUSTOMIZED.toString());
      destIS.setSimpleField(IdealStateProperty.NUM_PARTITIONS.toString(),
          Integer.toString(testInfo._numPartitionsPerDb));
      destIS.setSimpleField(IdealStateProperty.STATE_MODEL_DEF_REF.toString(), STATE_MODEL);
      destIS.setSimpleField(IdealStateProperty.REPLICAS.toString(), "" + testInfo._replica);
      // String idealStatePath = "/" + clusterName + "/" +
      // PropertyType.IDEALSTATES.toString() + "/"
      // + TEST_DB_PREFIX + i;
      ZNRecord initIS = new ZNRecord(dbName); // _zkClient.<ZNRecord>
                                              // readData(idealStatePath);
      initIS.setSimpleField(IdealStateProperty.IDEAL_STATE_MODE.toString(),
          IdealStateModeProperty.CUSTOMIZED.toString());
      initIS.setSimpleField(IdealStateProperty.NUM_PARTITIONS.toString(),
          Integer.toString(testInfo._numPartitionsPerDb));
      initIS.setSimpleField(IdealStateProperty.STATE_MODEL_DEF_REF.toString(), STATE_MODEL);
      initIS.setSimpleField(IdealStateProperty.REPLICAS.toString(), "" + testInfo._replica);
      int totalStep = calcuateNumTransitions(initIS, destIS);
      // LOG.info("initIS:" + initIS);
      // LOG.info("destIS:" + destIS);
      // LOG.info("totalSteps from initIS to destIS:" + totalStep);
      // System.out.println("initIS:" + initIS);
      // System.out.println("destIS:" + destIS);

      ZNRecord nextIS;
      int step = totalStep * percentage / 100;
      System.out.println("Resource:" + dbName + ", totalSteps from initIS to destIS:" + totalStep
          + ", walk " + step + " steps(" + percentage + "%)");
      nextIS = nextIdealState(initIS, destIS, step);
      // testInfo._idealStateMap.put(dbName, nextIS);
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    IdealState idealState = _setupTool.getClusterManagementTool().getResourceIdealState(CLUSTER_NAME, TEST_DB);
    Map<String, ZNRecord> scnTableMap = new HashMap<String, ZNRecord>();
    for (int i = 0; i < NODE_NR; i++)
    {
      String instance = PARTICIPANT_PREFIX + "_" + (START_PORT + i);
      ZNRecord scnRecord = new ZNRecord("scnTable");
      scnRecord.setSimpleField("instance", instance);
      scnTableMap.put(instance, scnRecord);
    }
    String instanceDead = PARTICIPANT_PREFIX + "_" + (START_PORT + 0);
    for(int j = 0; j < _PARTITIONS; j++)
    {
      int seq = 50;
      String partition = TEST_DB + "_" + j;
      List<String> idealStatePrefList =
          idealState.getPreferenceList(partition);
      String idealStateMaster = idealStatePrefList.get(0);
      // Switch the scn order of the partitions mastered on instanceDead
      if(idealStateMaster.equals(instanceDead))
      {
        for(int x = 0; x < idealStatePrefList.size(); x++)
        {
          String instance = idealStatePrefList.get(x);
          ZNRecord scnRecord = scnTableMap.get(instance);
          if(!scnRecord.getMapFields().containsKey(partition))
          {
            scnRecord.setMapField(partition, new HashMap<String, String>());
          }
          Map<String, String> scnDetails = scnRecord.getMapField(partition);
          scnDetails.put("gen", "4");
          if(x > 0)
          {
            scnDetails.put("seq", "" + (seq - 22 + 11 *(x)));
          }
          else
          {
            scnDetails.put("seq", "100");
          }
        }
      }
    }

    for(String instanceName : scnTableMap.keySet())
    {
      Builder kb = accessor.keyBuilder();
      accessor.setProperty(kb.healthReport(instanceName, "scnTable"), new HealthStat(scnTableMap.get(instanceName)));
    }

    // kill a node, after a while the master should be the last one in the ideal state pref list
   
    _startCMResultMap.get(instanceDead)._manager.disconnect();
    _startCMResultMap.get(instanceDead)._thread.interrupt();
   
    Thread.sleep(1000);
   
    boolean verifyResult =
        ClusterStateVerifier.verifyByZkCallback(new MasterNbInExtViewVerifier(ZK_ADDR,
                                                                              CLUSTER_NAME));
    Assert.assertTrue(verifyResult);
    Builder kb = accessor.keyBuilder();
    ExternalView ev = accessor.getProperty(kb.externalView(TEST_DB));
    for(String partitionName : idealState.getPartitionSet())
    {
      List<String> prefList = idealState.getPreferenceList(partitionName);
      if(prefList.get(0).equals(instanceDead))
      {
        String last = prefList.get(prefList.size() - 1);
        Assert.assertTrue(ev.getStateMap(partitionName).get(last).equals("MASTER"));
      }
    }
   
    // Bring up the previous dead node, but as the SCN is the last for all the
    // master partitions on it, the master partitions should be still on the last if the prefList
    StartCMResult result =
        TestHelper.startDummyProcess(ZK_ADDR, CLUSTER_NAME, instanceDead);
    _startCMResultMap.put(instanceDead, result);

    Thread.sleep(1000);
    verifyResult =
        ClusterStateVerifier.verifyByZkCallback(new MasterNbInExtViewVerifier(ZK_ADDR,
                                                                              CLUSTER_NAME));
    Assert.assertTrue(verifyResult);
    for(String partitionName : idealState.getPartitionSet())
    {
      List<String> prefList = idealState.getPreferenceList(partitionName);
      if(prefList.get(0).equals(instanceDead))
      {
        String last = prefList.get(prefList.size() - 1);
        Assert.assertTrue(ev.getStateMap(partitionName).get(last).equals("MASTER"));
      }
    }
    // Reset the scn of the partitions
    for(int j = 0; j < _PARTITIONS; j++)
    {
      String partition = TEST_DB + "_" + j;
      List<String> idealStatePrefList =
          idealState.getPreferenceList(partition);
      String idealStateMaster = idealStatePrefList.get(0);
      // Switch back the scn to the same
      if(idealStateMaster.equals(instanceDead))
      {
        for(int x = 0; x < idealStatePrefList.size(); x++)
        {
          String instance = idealStatePrefList.get(x);
          ZNRecord scnRecord = scnTableMap.get(instance);
          if(!scnRecord.getMapFields().containsKey(partition))
          {
            scnRecord.setMapField(partition, new HashMap<String, String>());
          }
          Map<String, String> scnDetails = scnRecord.getMapField(partition);
          scnDetails.put("gen", "4");
          scnDetails.put("seq", "100");
        }
      }
    }
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    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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