/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.service.thrift.impl;

import org.apache.iotdb.common.rpc.thrift.TConfigNodeLocation;
import org.apache.iotdb.common.rpc.thrift.TConsensusGroupId;
import org.apache.iotdb.common.rpc.thrift.TDataNodeLocation;
import org.apache.iotdb.common.rpc.thrift.TEndPoint;
import org.apache.iotdb.common.rpc.thrift.TFlushReq;
import org.apache.iotdb.common.rpc.thrift.TSStatus;
import org.apache.iotdb.common.rpc.thrift.TSetSpaceQuotaReq;
import org.apache.iotdb.common.rpc.thrift.TSetTTLReq;
import org.apache.iotdb.common.rpc.thrift.TSetThrottleQuotaReq;
import org.apache.iotdb.common.rpc.thrift.TSettleReq;
import org.apache.iotdb.commons.cluster.NodeStatus;
import org.apache.iotdb.commons.conf.CommonConfig;
import org.apache.iotdb.commons.conf.CommonDescriptor;
import org.apache.iotdb.commons.conf.IoTDBConstant.ClientVersion;
import org.apache.iotdb.commons.consensus.ConsensusGroupId;
import org.apache.iotdb.commons.consensus.DataRegionId;
import org.apache.iotdb.commons.consensus.SchemaRegionId;
import org.apache.iotdb.commons.exception.IllegalPathException;
import org.apache.iotdb.commons.exception.MetadataException;
import org.apache.iotdb.commons.path.PartialPath;
import org.apache.iotdb.commons.path.PathDeserializeUtil;
import org.apache.iotdb.commons.path.PathPatternTree;
import org.apache.iotdb.commons.pipe.plugin.meta.PipePluginMeta;
import org.apache.iotdb.commons.pipe.task.meta.PipeMeta;
import org.apache.iotdb.commons.schema.view.viewExpression.ViewExpression;
import org.apache.iotdb.commons.service.metric.MetricService;
import org.apache.iotdb.commons.service.metric.enums.Metric;
import org.apache.iotdb.commons.service.metric.enums.Tag;
import org.apache.iotdb.commons.trigger.TriggerInformation;
import org.apache.iotdb.commons.udf.UDFInformation;
import org.apache.iotdb.commons.udf.service.UDFManagementService;
import org.apache.iotdb.consensus.common.Peer;
import org.apache.iotdb.consensus.common.response.ConsensusGenericResponse;
import org.apache.iotdb.consensus.exception.PeerNotInConsensusGroupException;
import org.apache.iotdb.db.auth.AuthorizerManager;
import org.apache.iotdb.db.client.ConfigNodeInfo;
import org.apache.iotdb.db.conf.IoTDBDescriptor;
import org.apache.iotdb.db.conf.OperationType;
import org.apache.iotdb.db.consensus.DataRegionConsensusImpl;
import org.apache.iotdb.db.consensus.SchemaRegionConsensusImpl;
import org.apache.iotdb.db.engine.StorageEngine;
import org.apache.iotdb.db.engine.settle.SettleRequestHandler;
import org.apache.iotdb.db.exception.StorageEngineException;
import org.apache.iotdb.db.metadata.cache.DataNodeDevicePathCache;
import org.apache.iotdb.db.metadata.cache.DataNodeSchemaCache;
import org.apache.iotdb.db.metadata.query.info.ITimeSeriesSchemaInfo;
import org.apache.iotdb.db.metadata.query.reader.ISchemaReader;
import org.apache.iotdb.db.metadata.schemaregion.ISchemaRegion;
import org.apache.iotdb.db.metadata.schemaregion.SchemaEngine;
import org.apache.iotdb.db.metadata.template.ClusterTemplateManager;
import org.apache.iotdb.db.metadata.template.TemplateInternalRPCUpdateType;
import org.apache.iotdb.db.mpp.common.FragmentInstanceId;
import org.apache.iotdb.db.mpp.execution.executor.RegionExecutionResult;
import org.apache.iotdb.db.mpp.execution.executor.RegionReadExecutor;
import org.apache.iotdb.db.mpp.execution.executor.RegionWriteExecutor;
import org.apache.iotdb.db.mpp.execution.fragment.FragmentInstanceFailureInfo;
import org.apache.iotdb.db.mpp.execution.fragment.FragmentInstanceInfo;
import org.apache.iotdb.db.mpp.execution.fragment.FragmentInstanceManager;
import org.apache.iotdb.db.mpp.execution.fragment.FragmentInstanceState;
import org.apache.iotdb.db.mpp.execution.operator.schema.source.ISchemaSource;
import org.apache.iotdb.db.mpp.execution.operator.schema.source.SchemaSourceFactory;
import org.apache.iotdb.db.mpp.plan.Coordinator;
import org.apache.iotdb.db.mpp.plan.analyze.ClusterPartitionFetcher;
import org.apache.iotdb.db.mpp.plan.analyze.IPartitionFetcher;
import org.apache.iotdb.db.mpp.plan.analyze.schema.ClusterSchemaFetcher;
import org.apache.iotdb.db.mpp.plan.analyze.schema.ISchemaFetcher;
import org.apache.iotdb.db.mpp.plan.execution.ExecutionResult;
import org.apache.iotdb.db.mpp.plan.execution.IQueryExecution;
import org.apache.iotdb.db.mpp.plan.expression.Expression;
import org.apache.iotdb.db.mpp.plan.expression.binary.GreaterEqualExpression;
import org.apache.iotdb.db.mpp.plan.expression.binary.LessThanExpression;
import org.apache.iotdb.db.mpp.plan.expression.binary.LogicAndExpression;
import org.apache.iotdb.db.mpp.plan.expression.leaf.ConstantOperand;
import org.apache.iotdb.db.mpp.plan.expression.leaf.TimestampOperand;
import org.apache.iotdb.db.mpp.plan.parser.StatementGenerator;
import org.apache.iotdb.db.mpp.plan.planner.plan.FragmentInstance;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.PlanNode;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.PlanNodeId;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.PlanNodeType;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.load.LoadTsFilePieceNode;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.metedata.write.ConstructSchemaBlackListNode;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.metedata.write.DeactivateTemplateNode;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.metedata.write.DeleteTimeSeriesNode;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.metedata.write.PreDeactivateTemplateNode;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.metedata.write.RollbackPreDeactivateTemplateNode;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.metedata.write.RollbackSchemaBlackListNode;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.metedata.write.view.AlterLogicalViewNode;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.metedata.write.view.ConstructLogicalViewBlackListNode;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.metedata.write.view.DeleteLogicalViewNode;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.metedata.write.view.RollbackLogicalViewBlackListNode;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.write.DeleteDataNode;
import org.apache.iotdb.db.mpp.plan.scheduler.load.LoadTsFileScheduler;
import org.apache.iotdb.db.mpp.plan.statement.component.WhereCondition;
import org.apache.iotdb.db.mpp.plan.statement.crud.QueryStatement;
import org.apache.iotdb.db.mpp.plan.statement.metadata.DeleteTimeSeriesStatement;
import org.apache.iotdb.db.pipe.agent.PipeAgent;
import org.apache.iotdb.db.query.control.SessionManager;
import org.apache.iotdb.db.query.control.clientsession.IClientSession;
import org.apache.iotdb.db.query.control.clientsession.InternalClientSession;
import org.apache.iotdb.db.quotas.DataNodeSpaceQuotaManager;
import org.apache.iotdb.db.quotas.DataNodeThrottleQuotaManager;
import org.apache.iotdb.db.service.DataNode;
import org.apache.iotdb.db.service.RegionMigrateService;
import org.apache.iotdb.db.trigger.executor.TriggerExecutor;
import org.apache.iotdb.db.trigger.executor.TriggerFireResult;
import org.apache.iotdb.db.trigger.service.TriggerManagementService;
import org.apache.iotdb.db.utils.SetThreadName;
import org.apache.iotdb.metrics.type.AutoGauge;
import org.apache.iotdb.metrics.utils.MetricLevel;
import org.apache.iotdb.mpp.rpc.thrift.IDataNodeRPCService;
import org.apache.iotdb.mpp.rpc.thrift.TActiveTriggerInstanceReq;
import org.apache.iotdb.mpp.rpc.thrift.TAlterViewReq;
import org.apache.iotdb.mpp.rpc.thrift.TCancelFragmentInstanceReq;
import org.apache.iotdb.mpp.rpc.thrift.TCancelPlanFragmentReq;
import org.apache.iotdb.mpp.rpc.thrift.TCancelQueryReq;
import org.apache.iotdb.mpp.rpc.thrift.TCancelResp;
import org.apache.iotdb.mpp.rpc.thrift.TCheckTimeSeriesExistenceReq;
import org.apache.iotdb.mpp.rpc.thrift.TCheckTimeSeriesExistenceResp;
import org.apache.iotdb.mpp.rpc.thrift.TConstructSchemaBlackListReq;
import org.apache.iotdb.mpp.rpc.thrift.TConstructSchemaBlackListWithTemplateReq;
import org.apache.iotdb.mpp.rpc.thrift.TConstructViewSchemaBlackListReq;
import org.apache.iotdb.mpp.rpc.thrift.TCountPathsUsingTemplateReq;
import org.apache.iotdb.mpp.rpc.thrift.TCountPathsUsingTemplateResp;
import org.apache.iotdb.mpp.rpc.thrift.TCreateDataRegionReq;
import org.apache.iotdb.mpp.rpc.thrift.TCreateFunctionInstanceReq;
import org.apache.iotdb.mpp.rpc.thrift.TCreatePeerReq;
import org.apache.iotdb.mpp.rpc.thrift.TCreatePipePluginInstanceReq;
import org.apache.iotdb.mpp.rpc.thrift.TCreateSchemaRegionReq;
import org.apache.iotdb.mpp.rpc.thrift.TCreateTriggerInstanceReq;
import org.apache.iotdb.mpp.rpc.thrift.TDeactivateTemplateReq;
import org.apache.iotdb.mpp.rpc.thrift.TDeleteDataForDeleteSchemaReq;
import org.apache.iotdb.mpp.rpc.thrift.TDeleteModelMetricsReq;
import org.apache.iotdb.mpp.rpc.thrift.TDeleteTimeSeriesReq;
import org.apache.iotdb.mpp.rpc.thrift.TDeleteViewSchemaReq;
import org.apache.iotdb.mpp.rpc.thrift.TDisableDataNodeReq;
import org.apache.iotdb.mpp.rpc.thrift.TDropFunctionInstanceReq;
import org.apache.iotdb.mpp.rpc.thrift.TDropPipePluginInstanceReq;
import org.apache.iotdb.mpp.rpc.thrift.TDropTriggerInstanceReq;
import org.apache.iotdb.mpp.rpc.thrift.TExecuteCQ;
import org.apache.iotdb.mpp.rpc.thrift.TFetchFragmentInstanceInfoReq;
import org.apache.iotdb.mpp.rpc.thrift.TFetchSchemaBlackListReq;
import org.apache.iotdb.mpp.rpc.thrift.TFetchSchemaBlackListResp;
import org.apache.iotdb.mpp.rpc.thrift.TFireTriggerReq;
import org.apache.iotdb.mpp.rpc.thrift.TFireTriggerResp;
import org.apache.iotdb.mpp.rpc.thrift.TFragmentInstanceInfoResp;
import org.apache.iotdb.mpp.rpc.thrift.THeartbeatReq;
import org.apache.iotdb.mpp.rpc.thrift.THeartbeatResp;
import org.apache.iotdb.mpp.rpc.thrift.TInactiveTriggerInstanceReq;
import org.apache.iotdb.mpp.rpc.thrift.TInvalidateCacheReq;
import org.apache.iotdb.mpp.rpc.thrift.TInvalidateMatchedSchemaCacheReq;
import org.apache.iotdb.mpp.rpc.thrift.TInvalidatePermissionCacheReq;
import org.apache.iotdb.mpp.rpc.thrift.TLoadCommandReq;
import org.apache.iotdb.mpp.rpc.thrift.TLoadResp;
import org.apache.iotdb.mpp.rpc.thrift.TLoadSample;
import org.apache.iotdb.mpp.rpc.thrift.TMaintainPeerReq;
import org.apache.iotdb.mpp.rpc.thrift.TPipeHeartbeatReq;
import org.apache.iotdb.mpp.rpc.thrift.TPipeHeartbeatResp;
import org.apache.iotdb.mpp.rpc.thrift.TPushPipeMetaReq;
import org.apache.iotdb.mpp.rpc.thrift.TRegionLeaderChangeReq;
import org.apache.iotdb.mpp.rpc.thrift.TRegionRouteReq;
import org.apache.iotdb.mpp.rpc.thrift.TRollbackSchemaBlackListReq;
import org.apache.iotdb.mpp.rpc.thrift.TRollbackSchemaBlackListWithTemplateReq;
import org.apache.iotdb.mpp.rpc.thrift.TRollbackViewSchemaBlackListReq;
import org.apache.iotdb.mpp.rpc.thrift.TSchemaFetchRequest;
import org.apache.iotdb.mpp.rpc.thrift.TSchemaFetchResponse;
import org.apache.iotdb.mpp.rpc.thrift.TSendBatchPlanNodeReq;
import org.apache.iotdb.mpp.rpc.thrift.TSendBatchPlanNodeResp;
import org.apache.iotdb.mpp.rpc.thrift.TSendFragmentInstanceReq;
import org.apache.iotdb.mpp.rpc.thrift.TSendFragmentInstanceResp;
import org.apache.iotdb.mpp.rpc.thrift.TSendSinglePlanNodeResp;
import org.apache.iotdb.mpp.rpc.thrift.TTsFilePieceReq;
import org.apache.iotdb.mpp.rpc.thrift.TUpdateConfigNodeGroupReq;
import org.apache.iotdb.mpp.rpc.thrift.TUpdateTemplateReq;
import org.apache.iotdb.mpp.rpc.thrift.TUpdateTriggerLocationReq;
import org.apache.iotdb.rpc.RpcUtils;
import org.apache.iotdb.rpc.TSStatusCode;
import org.apache.iotdb.trigger.api.enums.FailureStrategy;
import org.apache.iotdb.trigger.api.enums.TriggerEvent;
import org.apache.iotdb.tsfile.exception.NotImplementedException;
import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
import org.apache.iotdb.tsfile.read.common.block.TsBlock;
import org.apache.iotdb.tsfile.utils.ReadWriteIOUtils;
import org.apache.iotdb.tsfile.write.record.Tablet;

import com.google.common.collect.ImmutableList;
import org.apache.thrift.TException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.TimeZone;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.function.Function;
import java.util.stream.Collectors;

import static org.apache.iotdb.commons.conf.IoTDBConstant.MULTI_LEVEL_PATH_WILDCARD;
import static org.apache.iotdb.db.service.RegionMigrateService.REGION_MIGRATE_PROCESS;
import static org.apache.iotdb.db.utils.ErrorHandlingUtils.onQueryException;

public class DataNodeInternalRPCServiceImpl implements IDataNodeRPCService.Iface {

  private static final Logger LOGGER =
      LoggerFactory.getLogger(DataNodeInternalRPCServiceImpl.class);

  private static final SessionManager SESSION_MANAGER = SessionManager.getInstance();

  private static final Coordinator COORDINATOR = Coordinator.getInstance();

  private final IPartitionFetcher PARTITION_FETCHER;

  private final ISchemaFetcher SCHEMA_FETCHER;

  private final SchemaEngine schemaEngine = SchemaEngine.getInstance();
  private final StorageEngine storageEngine = StorageEngine.getInstance();

  private final DataNodeRegionManager regionManager = DataNodeRegionManager.getInstance();

  private final DataNodeSpaceQuotaManager spaceQuotaManager =
      DataNodeSpaceQuotaManager.getInstance();

  private final DataNodeThrottleQuotaManager throttleQuotaManager =
      DataNodeThrottleQuotaManager.getInstance();

  public DataNodeInternalRPCServiceImpl() {
    super();
    PARTITION_FETCHER = ClusterPartitionFetcher.getInstance();
    SCHEMA_FETCHER = ClusterSchemaFetcher.getInstance();
  }

  @Override
  public TSendFragmentInstanceResp sendFragmentInstance(TSendFragmentInstanceReq req) {
    LOGGER.debug("receive FragmentInstance to group[{}]", req.getConsensusGroupId());

    // deserialize ConsensusGroupId
    ConsensusGroupId groupId = null;
    if (req.consensusGroupId != null) {
      try {
        groupId = ConsensusGroupId.Factory.createFromTConsensusGroupId(req.getConsensusGroupId());
      } catch (Throwable t) {
        LOGGER.warn("Deserialize ConsensusGroupId failed. ", t);
        TSendFragmentInstanceResp resp = new TSendFragmentInstanceResp(false);
        resp.setMessage("Deserialize ConsensusGroupId failed: " + t.getMessage());
        return resp;
      }
    }

    // We deserialize here instead of the underlying state machine because parallelism is possible
    // here but not at the underlying state machine
    FragmentInstance fragmentInstance;
    try {
      fragmentInstance = FragmentInstance.deserializeFrom(req.fragmentInstance.body);
    } catch (Throwable t) {
      LOGGER.warn("Deserialize FragmentInstance failed.", t);
      TSendFragmentInstanceResp resp = new TSendFragmentInstanceResp(false);
      resp.setMessage("Deserialize FragmentInstance failed: " + t.getMessage());
      return resp;
    }

    RegionReadExecutor executor = new RegionReadExecutor();
    RegionExecutionResult executionResult =
        groupId == null
            ? executor.execute(fragmentInstance)
            : executor.execute(groupId, fragmentInstance);
    TSendFragmentInstanceResp resp = new TSendFragmentInstanceResp();
    resp.setAccepted(executionResult.isAccepted());
    resp.setMessage(executionResult.getMessage());
    // TODO
    return resp;
  }

  @Override
  public TSendBatchPlanNodeResp sendBatchPlanNode(TSendBatchPlanNodeReq req) {
    List<TSendSinglePlanNodeResp> responses =
        req.getRequests().stream()
            .map(
                request -> {
                  ConsensusGroupId groupId =
                      ConsensusGroupId.Factory.createFromTConsensusGroupId(
                          request.getConsensusGroupId());
                  PlanNode planNode = PlanNodeType.deserialize(request.planNode.body);
                  RegionWriteExecutor executor = new RegionWriteExecutor();
                  TSendSinglePlanNodeResp resp = new TSendSinglePlanNodeResp();
                  RegionExecutionResult executionResult = executor.execute(groupId, planNode);
                  resp.setAccepted(executionResult.isAccepted());
                  resp.setMessage(executionResult.getMessage());
                  resp.setStatus(executionResult.getStatus());
                  return resp;
                })
            .collect(Collectors.toList());
    return new TSendBatchPlanNodeResp(responses);
  }

  @Override
  public TFragmentInstanceInfoResp fetchFragmentInstanceInfo(TFetchFragmentInstanceInfoReq req) {
    FragmentInstanceId instanceId = FragmentInstanceId.fromThrift(req.fragmentInstanceId);
    FragmentInstanceInfo info = FragmentInstanceManager.getInstance().getInstanceInfo(instanceId);
    if (info != null) {
      TFragmentInstanceInfoResp resp = new TFragmentInstanceInfoResp(info.getState().toString());
      resp.setEndTime(info.getEndTime());
      resp.setFailedMessages(ImmutableList.of(info.getMessage()));
      try {
        List<ByteBuffer> failureInfoList = new ArrayList<>();
        for (FragmentInstanceFailureInfo failureInfo : info.getFailureInfoList()) {
          failureInfoList.add(failureInfo.serialize());
        }
        resp.setFailureInfoList(failureInfoList);
        return resp;
      } catch (IOException e) {
        return resp;
      }
    } else {
      return new TFragmentInstanceInfoResp(FragmentInstanceState.NO_SUCH_INSTANCE.toString());
    }
  }

  @Override
  public TCancelResp cancelQuery(TCancelQueryReq req) {
    try (SetThreadName threadName = new SetThreadName(req.getQueryId())) {
      List<FragmentInstanceId> taskIds =
          req.getFragmentInstanceIds().stream()
              .map(FragmentInstanceId::fromThrift)
              .collect(Collectors.toList());
      for (FragmentInstanceId taskId : taskIds) {
        FragmentInstanceManager.getInstance().cancelTask(taskId, req.hasThrowable);
      }
      return new TCancelResp(true);
    }
  }

  @Override
  public TCancelResp cancelPlanFragment(TCancelPlanFragmentReq req) {
    throw new NotImplementedException();
  }

  @Override
  public TCancelResp cancelFragmentInstance(TCancelFragmentInstanceReq req) {
    throw new NotImplementedException();
  }

  @Override
  public TSchemaFetchResponse fetchSchema(TSchemaFetchRequest req) {
    throw new UnsupportedOperationException();
  }

  @Override
  public TLoadResp sendTsFilePieceNode(TTsFilePieceReq req) throws TException {
    LOGGER.info("Receive load node from uuid {}.", req.uuid);

    ConsensusGroupId groupId =
        ConsensusGroupId.Factory.createFromTConsensusGroupId(req.consensusGroupId);
    LoadTsFilePieceNode pieceNode = (LoadTsFilePieceNode) PlanNodeType.deserialize(req.body);
    if (pieceNode == null) {
      return createTLoadResp(
          new TSStatus(TSStatusCode.DESERIALIZE_PIECE_OF_TSFILE_ERROR.getStatusCode()));
    }

    TSStatus resultStatus =
        StorageEngine.getInstance()
            .writeLoadTsFileNode((DataRegionId) groupId, pieceNode, req.uuid);

    return createTLoadResp(resultStatus);
  }

  @Override
  public TLoadResp sendLoadCommand(TLoadCommandReq req) throws TException {

    TSStatus resultStatus =
        StorageEngine.getInstance()
            .executeLoadCommand(
                LoadTsFileScheduler.LoadCommand.values()[req.commandType], req.uuid);
    return createTLoadResp(resultStatus);
  }

  private TLoadResp createTLoadResp(TSStatus resultStatus) {
    boolean isAccepted = RpcUtils.SUCCESS_STATUS.equals(resultStatus);
    TLoadResp loadResp = new TLoadResp(isAccepted);
    if (!isAccepted) {
      loadResp.setMessage(resultStatus.getMessage());
      loadResp.setStatus(resultStatus);
    }
    return loadResp;
  }

  @Override
  public TSStatus createSchemaRegion(TCreateSchemaRegionReq req) {
    return regionManager.createSchemaRegion(req.getRegionReplicaSet(), req.getStorageGroup());
  }

  @Override
  public TSStatus createDataRegion(TCreateDataRegionReq req) {
    return regionManager.createDataRegion(
        req.getRegionReplicaSet(), req.getStorageGroup(), req.getTtl());
  }

  @Override
  public TSStatus invalidatePartitionCache(TInvalidateCacheReq req) {
    ClusterPartitionFetcher.getInstance().invalidAllCache();
    return new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
  }

  @Override
  public TSStatus invalidateSchemaCache(TInvalidateCacheReq req) {
    DataNodeSchemaCache.getInstance().takeWriteLock();
    try {
      DataNodeSchemaCache.getInstance().invalidateAll();
      ClusterTemplateManager.getInstance().invalid(req.getFullPath());
      return new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
    } finally {
      DataNodeSchemaCache.getInstance().releaseWriteLock();
    }
  }

  @Override
  public TSStatus constructSchemaBlackList(TConstructSchemaBlackListReq req) throws TException {
    PathPatternTree patternTree =
        PathPatternTree.deserialize(ByteBuffer.wrap(req.getPathPatternTree()));
    AtomicInteger preDeletedNum = new AtomicInteger(0);
    TSStatus executionResult =
        executeInternalSchemaTask(
            req.getSchemaRegionIdList(),
            consensusGroupId -> {
              String storageGroup =
                  schemaEngine
                      .getSchemaRegion(new SchemaRegionId(consensusGroupId.getId()))
                      .getDatabaseFullPath();
              PathPatternTree filteredPatternTree =
                  filterPathPatternTree(patternTree, storageGroup);
              if (filteredPatternTree.isEmpty()) {
                return RpcUtils.SUCCESS_STATUS;
              }
              RegionWriteExecutor executor = new RegionWriteExecutor();
              TSStatus status =
                  executor
                      .execute(
                          new SchemaRegionId(consensusGroupId.getId()),
                          new ConstructSchemaBlackListNode(new PlanNodeId(""), filteredPatternTree))
                      .getStatus();
              if (status.code == TSStatusCode.SUCCESS_STATUS.getStatusCode()) {
                preDeletedNum.getAndAdd(Integer.parseInt(status.getMessage()));
              }
              return status;
            });
    executionResult.setMessage(String.valueOf(preDeletedNum.get()));
    return executionResult;
  }

  @Override
  public TSStatus rollbackSchemaBlackList(TRollbackSchemaBlackListReq req) throws TException {
    PathPatternTree patternTree =
        PathPatternTree.deserialize(ByteBuffer.wrap(req.getPathPatternTree()));
    return executeInternalSchemaTask(
        req.getSchemaRegionIdList(),
        consensusGroupId -> {
          String storageGroup =
              schemaEngine
                  .getSchemaRegion(new SchemaRegionId(consensusGroupId.getId()))
                  .getDatabaseFullPath();
          PathPatternTree filteredPatternTree = filterPathPatternTree(patternTree, storageGroup);
          if (filteredPatternTree.isEmpty()) {
            return RpcUtils.SUCCESS_STATUS;
          }
          RegionWriteExecutor executor = new RegionWriteExecutor();
          return executor
              .execute(
                  new SchemaRegionId(consensusGroupId.getId()),
                  new RollbackSchemaBlackListNode(new PlanNodeId(""), filteredPatternTree))
              .getStatus();
        });
  }

  @Override
  public TSStatus invalidateMatchedSchemaCache(TInvalidateMatchedSchemaCacheReq req)
      throws TException {
    DataNodeSchemaCache cache = DataNodeSchemaCache.getInstance();
    cache.takeWriteLock();
    try {
      // todo implement precise timeseries clean rather than clean all
      cache.invalidateAll();
    } finally {
      cache.releaseWriteLock();
    }
    return RpcUtils.SUCCESS_STATUS;
  }

  @Override
  public TFetchSchemaBlackListResp fetchSchemaBlackList(TFetchSchemaBlackListReq req)
      throws TException {
    PathPatternTree patternTree = PathPatternTree.deserialize(req.pathPatternTree);
    TFetchSchemaBlackListResp resp = new TFetchSchemaBlackListResp();
    PathPatternTree result = new PathPatternTree();
    for (TConsensusGroupId consensusGroupId : req.getSchemaRegionIdList()) {
      // todo implement as consensus layer read request
      try {
        ISchemaRegion schemaRegion =
            schemaEngine.getSchemaRegion(new SchemaRegionId(consensusGroupId.getId()));
        PathPatternTree filteredPatternTree =
            filterPathPatternTree(patternTree, schemaRegion.getDatabaseFullPath());
        if (filteredPatternTree.isEmpty()) {
          continue;
        }
        for (PartialPath path : schemaRegion.fetchSchemaBlackList(filteredPatternTree)) {
          result.appendFullPath(path);
        }
      } catch (MetadataException e) {
        LOGGER.warn(e.getMessage(), e);
        resp.setStatus(RpcUtils.getStatus(e.getErrorCode(), e.getMessage()));
        return resp;
      }
    }
    resp.setStatus(RpcUtils.SUCCESS_STATUS);
    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
    DataOutputStream dataOutputStream = new DataOutputStream(outputStream);
    result.constructTree();
    try {
      result.serialize(dataOutputStream);
    } catch (IOException ignored) {
      // won't reach here
    }
    resp.setPathPatternTree(outputStream.toByteArray());
    return resp;
  }

  @Override
  public TSStatus deleteDataForDeleteSchema(TDeleteDataForDeleteSchemaReq req) throws TException {
    PathPatternTree patternTree =
        PathPatternTree.deserialize(ByteBuffer.wrap(req.getPathPatternTree()));
    List<PartialPath> pathList = patternTree.getAllPathPatterns();
    return executeInternalSchemaTask(
        req.getDataRegionIdList(),
        consensusGroupId -> {
          RegionWriteExecutor executor = new RegionWriteExecutor();
          return executor
              .execute(
                  new DataRegionId(consensusGroupId.getId()),
                  new DeleteDataNode(new PlanNodeId(""), pathList, Long.MIN_VALUE, Long.MAX_VALUE))
              .getStatus();
        });
  }

  @Override
  public TSStatus deleteTimeSeries(TDeleteTimeSeriesReq req) throws TException {
    PathPatternTree patternTree =
        PathPatternTree.deserialize(ByteBuffer.wrap(req.getPathPatternTree()));
    return executeInternalSchemaTask(
        req.getSchemaRegionIdList(),
        consensusGroupId -> {
          String storageGroup =
              schemaEngine
                  .getSchemaRegion(new SchemaRegionId(consensusGroupId.getId()))
                  .getDatabaseFullPath();
          PathPatternTree filteredPatternTree = filterPathPatternTree(patternTree, storageGroup);
          if (filteredPatternTree.isEmpty()) {
            return RpcUtils.SUCCESS_STATUS;
          }
          RegionWriteExecutor executor = new RegionWriteExecutor();
          return executor
              .execute(
                  new SchemaRegionId(consensusGroupId.getId()),
                  new DeleteTimeSeriesNode(new PlanNodeId(""), filteredPatternTree))
              .getStatus();
        });
  }

  @Override
  public TSStatus constructSchemaBlackListWithTemplate(TConstructSchemaBlackListWithTemplateReq req)
      throws TException {
    AtomicInteger preDeactivateTemplateNum = new AtomicInteger(0);
    Map<PartialPath, List<Integer>> templateSetInfo =
        transformTemplateSetInfo(req.getTemplateSetInfo());
    TSStatus executionResult =
        executeInternalSchemaTask(
            req.getSchemaRegionIdList(),
            consensusGroupId -> {
              Map<PartialPath, List<Integer>> filteredTemplateSetInfo =
                  filterTemplateSetInfo(templateSetInfo, consensusGroupId);
              if (filteredTemplateSetInfo.isEmpty()) {
                return RpcUtils.SUCCESS_STATUS;
              }

              RegionWriteExecutor executor = new RegionWriteExecutor();
              TSStatus status =
                  executor
                      .execute(
                          new SchemaRegionId(consensusGroupId.getId()),
                          new PreDeactivateTemplateNode(
                              new PlanNodeId(""), filteredTemplateSetInfo))
                      .getStatus();
              if (status.code == TSStatusCode.SUCCESS_STATUS.getStatusCode()) {
                preDeactivateTemplateNum.getAndAdd(Integer.parseInt(status.getMessage()));
              }
              return status;
            });
    executionResult.setMessage(String.valueOf(preDeactivateTemplateNum.get()));
    return executionResult;
  }

  private Map<PartialPath, List<Integer>> transformTemplateSetInfo(
      Map<String, List<Integer>> rawTemplateSetInfo) {
    Map<PartialPath, List<Integer>> result = new HashMap<>();
    rawTemplateSetInfo.forEach(
        (k, v) -> {
          try {
            result.put(new PartialPath(k), v);
          } catch (IllegalPathException ignored) {
            // won't reach here
          }
        });
    return result;
  }

  private Map<PartialPath, List<Integer>> filterTemplateSetInfo(
      Map<PartialPath, List<Integer>> templateSetInfo, TConsensusGroupId consensusGroupId) {

    PartialPath storageGroupPath = getStorageGroupPath(consensusGroupId);
    PartialPath storageGroupPattern = storageGroupPath.concatNode(MULTI_LEVEL_PATH_WILDCARD);
    Map<PartialPath, List<Integer>> result = new HashMap<>();
    templateSetInfo.forEach(
        (k, v) -> {
          if (storageGroupPattern.overlapWith(k) || storageGroupPath.overlapWith(k)) {
            result.put(k, v);
          }
        });
    return result;
  }

  private PartialPath getStorageGroupPath(TConsensusGroupId consensusGroupId) {
    PartialPath storageGroupPath = null;
    try {
      storageGroupPath =
          new PartialPath(
              schemaEngine
                  .getSchemaRegion(new SchemaRegionId(consensusGroupId.getId()))
                  .getDatabaseFullPath());
    } catch (IllegalPathException ignored) {
      // won't reach here
    }
    return storageGroupPath;
  }

  @Override
  public TSStatus rollbackSchemaBlackListWithTemplate(TRollbackSchemaBlackListWithTemplateReq req)
      throws TException {
    Map<PartialPath, List<Integer>> templateSetInfo =
        transformTemplateSetInfo(req.getTemplateSetInfo());
    return executeInternalSchemaTask(
        req.getSchemaRegionIdList(),
        consensusGroupId -> {
          Map<PartialPath, List<Integer>> filteredTemplateSetInfo =
              filterTemplateSetInfo(templateSetInfo, consensusGroupId);
          if (filteredTemplateSetInfo.isEmpty()) {
            return RpcUtils.SUCCESS_STATUS;
          }

          RegionWriteExecutor executor = new RegionWriteExecutor();
          return executor
              .execute(
                  new SchemaRegionId(consensusGroupId.getId()),
                  new RollbackPreDeactivateTemplateNode(
                      new PlanNodeId(""), filteredTemplateSetInfo))
              .getStatus();
        });
  }

  @Override
  public TSStatus deactivateTemplate(TDeactivateTemplateReq req) throws TException {
    Map<PartialPath, List<Integer>> templateSetInfo =
        transformTemplateSetInfo(req.getTemplateSetInfo());
    return executeInternalSchemaTask(
        req.getSchemaRegionIdList(),
        consensusGroupId -> {
          Map<PartialPath, List<Integer>> filteredTemplateSetInfo =
              filterTemplateSetInfo(templateSetInfo, consensusGroupId);
          if (filteredTemplateSetInfo.isEmpty()) {
            return RpcUtils.SUCCESS_STATUS;
          }

          RegionWriteExecutor executor = new RegionWriteExecutor();
          return executor
              .execute(
                  new SchemaRegionId(consensusGroupId.getId()),
                  new DeactivateTemplateNode(new PlanNodeId(""), filteredTemplateSetInfo))
              .getStatus();
        });
  }

  @Override
  public TCountPathsUsingTemplateResp countPathsUsingTemplate(TCountPathsUsingTemplateReq req)
      throws TException {
    PathPatternTree patternTree = PathPatternTree.deserialize(req.patternTree);
    TCountPathsUsingTemplateResp resp = new TCountPathsUsingTemplateResp();
    AtomicLong result = new AtomicLong(0);
    resp.setStatus(
        executeInternalSchemaTask(
            req.getSchemaRegionIdList(),
            consensusGroupId -> {
              ReadWriteLock readWriteLock =
                  regionManager.getRegionLock(new SchemaRegionId(consensusGroupId.getId()));
              // count paths using template for unset template shall block all template activation
              readWriteLock.writeLock().lock();
              try {
                ISchemaRegion schemaRegion =
                    schemaEngine.getSchemaRegion(new SchemaRegionId(consensusGroupId.getId()));
                PathPatternTree filteredPatternTree =
                    filterPathPatternTree(patternTree, schemaRegion.getDatabaseFullPath());
                if (filteredPatternTree.isEmpty()) {
                  return RpcUtils.SUCCESS_STATUS;
                }
                result.getAndAdd(
                    schemaRegion.countPathsUsingTemplate(req.getTemplateId(), filteredPatternTree));
                return RpcUtils.SUCCESS_STATUS;
              } catch (MetadataException e) {
                LOGGER.warn(e.getMessage(), e);
                return RpcUtils.getStatus(e.getErrorCode(), e.getMessage());
              } finally {
                readWriteLock.writeLock().unlock();
              }
            }));
    resp.setCount(result.get());
    return resp;
  }

  @Override
  public TCheckTimeSeriesExistenceResp checkTimeSeriesExistence(TCheckTimeSeriesExistenceReq req)
      throws TException {
    PathPatternTree patternTree = PathPatternTree.deserialize(req.patternTree);
    TCheckTimeSeriesExistenceResp resp = new TCheckTimeSeriesExistenceResp();
    TSStatus status =
        executeInternalSchemaTask(
            req.getSchemaRegionIdList(),
            consensusGroupId -> {
              ReadWriteLock readWriteLock =
                  regionManager.getRegionLock(new SchemaRegionId(consensusGroupId.getId()));
              // check timeseries existence for set template shall block all timeseries creation
              readWriteLock.writeLock().lock();
              try {
                ISchemaRegion schemaRegion =
                    schemaEngine.getSchemaRegion(new SchemaRegionId(consensusGroupId.getId()));
                PathPatternTree filteredPatternTree =
                    filterPathPatternTree(patternTree, schemaRegion.getDatabaseFullPath());
                if (filteredPatternTree.isEmpty()) {
                  return RpcUtils.SUCCESS_STATUS;
                }
                for (PartialPath pattern : filteredPatternTree.getAllPathPatterns()) {
                  ISchemaSource<ITimeSeriesSchemaInfo> schemaSource =
                      SchemaSourceFactory.getTimeSeriesSchemaCountSource(
                          pattern, false, null, null);
                  try (ISchemaReader<ITimeSeriesSchemaInfo> schemaReader =
                      schemaSource.getSchemaReader(schemaRegion)) {
                    if (schemaReader.hasNext()) {
                      return RpcUtils.getStatus(TSStatusCode.TIMESERIES_ALREADY_EXIST);
                    }
                  } catch (Exception e) {
                    LOGGER.warn(e.getMessage(), e);
                    return RpcUtils.getStatus(TSStatusCode.EXECUTE_STATEMENT_ERROR, e.getMessage());
                  }
                }
                return RpcUtils.SUCCESS_STATUS;
              } finally {
                readWriteLock.writeLock().unlock();
              }
            });
    if (status.getCode() == TSStatusCode.SUCCESS_STATUS.getStatusCode()) {
      resp.setStatus(RpcUtils.SUCCESS_STATUS);
      resp.setExists(false);
    } else if (status.getCode() == TSStatusCode.MULTIPLE_ERROR.getStatusCode()) {
      boolean hasFailure = false;
      for (TSStatus subStatus : status.getSubStatus()) {
        if (subStatus.getCode() == TSStatusCode.TIMESERIES_ALREADY_EXIST.getStatusCode()) {
          resp.setExists(true);
        } else if (subStatus.getCode() != TSStatusCode.SUCCESS_STATUS.getStatusCode()) {
          hasFailure = true;
          break;
        }
      }
      if (hasFailure) {
        resp.setStatus(status);
      } else {
        resp.setStatus(RpcUtils.SUCCESS_STATUS);
      }
    } else {
      resp.setStatus(status);
    }
    return resp;
  }

  @Override
  public TSStatus constructViewSchemaBlackList(TConstructViewSchemaBlackListReq req)
      throws TException {
    PathPatternTree patternTree =
        PathPatternTree.deserialize(ByteBuffer.wrap(req.getPathPatternTree()));
    AtomicInteger preDeletedNum = new AtomicInteger(0);
    TSStatus executionResult =
        executeInternalSchemaTask(
            req.getSchemaRegionIdList(),
            consensusGroupId -> {
              String storageGroup =
                  schemaEngine
                      .getSchemaRegion(new SchemaRegionId(consensusGroupId.getId()))
                      .getDatabaseFullPath();
              PathPatternTree filteredPatternTree =
                  filterPathPatternTree(patternTree, storageGroup);
              if (filteredPatternTree.isEmpty()) {
                return RpcUtils.SUCCESS_STATUS;
              }
              RegionWriteExecutor executor = new RegionWriteExecutor();
              TSStatus status =
                  executor
                      .execute(
                          new SchemaRegionId(consensusGroupId.getId()),
                          new ConstructLogicalViewBlackListNode(
                              new PlanNodeId(""), filteredPatternTree))
                      .getStatus();
              if (status.code == TSStatusCode.SUCCESS_STATUS.getStatusCode()) {
                preDeletedNum.getAndAdd(Integer.parseInt(status.getMessage()));
              }
              return status;
            });
    executionResult.setMessage(String.valueOf(preDeletedNum.get()));
    return executionResult;
  }

  @Override
  public TSStatus rollbackViewSchemaBlackList(TRollbackViewSchemaBlackListReq req)
      throws TException {
    PathPatternTree patternTree =
        PathPatternTree.deserialize(ByteBuffer.wrap(req.getPathPatternTree()));
    return executeInternalSchemaTask(
        req.getSchemaRegionIdList(),
        consensusGroupId -> {
          String storageGroup =
              schemaEngine
                  .getSchemaRegion(new SchemaRegionId(consensusGroupId.getId()))
                  .getDatabaseFullPath();
          PathPatternTree filteredPatternTree = filterPathPatternTree(patternTree, storageGroup);
          if (filteredPatternTree.isEmpty()) {
            return RpcUtils.SUCCESS_STATUS;
          }
          RegionWriteExecutor executor = new RegionWriteExecutor();
          return executor
              .execute(
                  new SchemaRegionId(consensusGroupId.getId()),
                  new RollbackLogicalViewBlackListNode(new PlanNodeId(""), filteredPatternTree))
              .getStatus();
        });
  }

  @Override
  public TSStatus deleteViewSchema(TDeleteViewSchemaReq req) throws TException {
    PathPatternTree patternTree =
        PathPatternTree.deserialize(ByteBuffer.wrap(req.getPathPatternTree()));
    return executeInternalSchemaTask(
        req.getSchemaRegionIdList(),
        consensusGroupId -> {
          String storageGroup =
              schemaEngine
                  .getSchemaRegion(new SchemaRegionId(consensusGroupId.getId()))
                  .getDatabaseFullPath();
          PathPatternTree filteredPatternTree = filterPathPatternTree(patternTree, storageGroup);
          if (filteredPatternTree.isEmpty()) {
            return RpcUtils.SUCCESS_STATUS;
          }
          RegionWriteExecutor executor = new RegionWriteExecutor();
          return executor
              .execute(
                  new SchemaRegionId(consensusGroupId.getId()),
                  new DeleteLogicalViewNode(new PlanNodeId(""), filteredPatternTree))
              .getStatus();
        });
  }

  @Override
  public TSStatus alterView(TAlterViewReq req) throws TException {
    List<TConsensusGroupId> consensusGroupIdList = req.getSchemaRegionIdList();
    List<ByteBuffer> viewBinaryList = req.getViewBinaryList();
    Map<TConsensusGroupId, Map<PartialPath, ViewExpression>> schemaRegionRequestMap =
        new HashMap<>();
    for (int i = 0; i < consensusGroupIdList.size(); i++) {
      ByteBuffer byteBuffer = viewBinaryList.get(i);
      int size = ReadWriteIOUtils.readInt(byteBuffer);
      Map<PartialPath, ViewExpression> viewMap = new HashMap<>();
      for (int j = 0; j < size; j++) {
        viewMap.put(
            (PartialPath) PathDeserializeUtil.deserialize(byteBuffer),
            ViewExpression.deserialize(byteBuffer));
      }
      schemaRegionRequestMap.put(consensusGroupIdList.get(i), viewMap);
    }
    return executeInternalSchemaTask(
        consensusGroupIdList,
        consensusGroupId -> {
          RegionWriteExecutor executor = new RegionWriteExecutor();
          return executor
              .execute(
                  new SchemaRegionId(consensusGroupId.getId()),
                  new AlterLogicalViewNode(
                      new PlanNodeId(""), schemaRegionRequestMap.get(consensusGroupId)))
              .getStatus();
        });
  }

  @Override
  public TSStatus pushPipeMeta(TPushPipeMetaReq req) {
    final List<PipeMeta> pipeMetas = new ArrayList<>();
    for (ByteBuffer byteBuffer : req.getPipeMetas()) {
      pipeMetas.add(PipeMeta.deserialize(byteBuffer));
    }
    try {
      PipeAgent.task().handlePipeMetaChanges(pipeMetas);
      return new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
    } catch (Exception e) {
      LOGGER.error("Error occurred when pushing pipe meta", e);
      return RpcUtils.getStatus(TSStatusCode.EXECUTE_STATEMENT_ERROR, e.getMessage());
    }
  }

  @Override
  public TPipeHeartbeatResp pipeHeartbeat(TPipeHeartbeatReq req) throws TException {
    final TPipeHeartbeatResp resp = new TPipeHeartbeatResp();
    PipeAgent.task().collectPipeMetaList(req, resp);
    return resp;
  }

  private TSStatus executeInternalSchemaTask(
      List<TConsensusGroupId> consensusGroupIdList,
      Function<TConsensusGroupId, TSStatus> executeOnOneRegion) {
    List<TSStatus> statusList = new ArrayList<>();
    TSStatus status;
    boolean hasFailure = false;
    for (TConsensusGroupId consensusGroupId : consensusGroupIdList) {
      status = executeOnOneRegion.apply(consensusGroupId);
      if (status.getCode() != TSStatusCode.SUCCESS_STATUS.getStatusCode()) {
        hasFailure = true;
      }
      statusList.add(status);
    }
    if (hasFailure) {
      return RpcUtils.getStatus(statusList);
    } else {
      return RpcUtils.SUCCESS_STATUS;
    }
  }

  @Override
  public TSStatus executeCQ(TExecuteCQ req) {

    IClientSession session = new InternalClientSession(req.cqId);

    SESSION_MANAGER.registerSession(session);

    SESSION_MANAGER.supplySession(session, req.getUsername(), req.getZoneId(), ClientVersion.V_1_0);

    String executedSQL = req.queryBody;

    try {
      QueryStatement s =
          (QueryStatement) StatementGenerator.createStatement(req.queryBody, session.getZoneId());
      if (s == null) {
        return RpcUtils.getStatus(
            TSStatusCode.SQL_PARSE_ERROR, "This operation type is not supported");
      }

      // 1. add time filter in where
      Expression timeFilter =
          new LogicAndExpression(
              new GreaterEqualExpression(
                  new TimestampOperand(),
                  new ConstantOperand(TSDataType.INT64, String.valueOf(req.startTime))),
              new LessThanExpression(
                  new TimestampOperand(),
                  new ConstantOperand(TSDataType.INT64, String.valueOf(req.endTime))));
      if (s.getWhereCondition() != null) {
        s.getWhereCondition()
            .setPredicate(new LogicAndExpression(timeFilter, s.getWhereCondition().getPredicate()));
      } else {
        s.setWhereCondition(new WhereCondition(timeFilter));
      }

      // 2. add time range in group by time
      if (s.getGroupByTimeComponent() != null) {
        s.getGroupByTimeComponent().setStartTime(req.startTime);
        s.getGroupByTimeComponent().setEndTime(req.endTime);
        s.getGroupByTimeComponent().setLeftCRightO(true);
      }
      executedSQL = String.join(" ", s.constructFormattedSQL().split("\n")).replaceAll(" +", " ");

      long queryId =
          SESSION_MANAGER.requestQueryId(session, SESSION_MANAGER.requestStatementId(session));
      // create and cache dataset
      ExecutionResult result =
          COORDINATOR.execute(
              s,
              queryId,
              SESSION_MANAGER.getSessionInfo(session),
              executedSQL,
              PARTITION_FETCHER,
              SCHEMA_FETCHER,
              req.getTimeout());

      if (result.status.code != TSStatusCode.SUCCESS_STATUS.getStatusCode()
          && result.status.code != TSStatusCode.REDIRECTION_RECOMMEND.getStatusCode()) {
        return result.status;
      }

      IQueryExecution queryExecution = COORDINATOR.getQueryExecution(queryId);

      try (SetThreadName threadName = new SetThreadName(result.queryId.getId())) {
        if (queryExecution != null) {
          // consume up all the result
          while (true) {
            Optional<TsBlock> optionalTsBlock = queryExecution.getBatchResult();
            if (!optionalTsBlock.isPresent()) {
              break;
            }
          }
        }
        return result.status;
      }
    } catch (Exception e) {
      // TODO call the coordinator to release query resource
      return onQueryException(e, "\"" + executedSQL + "\". " + OperationType.EXECUTE_STATEMENT);
    } finally {
      SESSION_MANAGER.closeSession(session, COORDINATOR::cleanupQueryExecution);
      SESSION_MANAGER.removeCurrSession();
    }
  }

  @Override
  public TSStatus deleteModelMetrics(TDeleteModelMetricsReq req) throws TException {
    IClientSession session = new InternalClientSession(req.getModelId());
    SESSION_MANAGER.registerSession(session);
    SESSION_MANAGER.supplySession(
        session, "MLNode", TimeZone.getDefault().getID(), ClientVersion.V_1_0);

    try {
      DeleteTimeSeriesStatement deleteTimeSeriesStatement = StatementGenerator.createStatement(req);

      long queryId = SESSION_MANAGER.requestQueryId();
      ExecutionResult result =
          COORDINATOR.execute(
              deleteTimeSeriesStatement,
              queryId,
              SESSION_MANAGER.getSessionInfo(session),
              "",
              PARTITION_FETCHER,
              SCHEMA_FETCHER);
      return result.status;
    } catch (Exception e) {
      return onQueryException(e, OperationType.DELETE_TIMESERIES);
    } finally {
      SESSION_MANAGER.closeSession(session, COORDINATOR::cleanupQueryExecution);
      SESSION_MANAGER.removeCurrSession();
    }
  }

  @Override
  public TSStatus setSpaceQuota(TSetSpaceQuotaReq req) throws TException {
    return spaceQuotaManager.setSpaceQuota(req);
  }

  @Override
  public TSStatus setThrottleQuota(TSetThrottleQuotaReq req) throws TException {
    return throttleQuotaManager.setThrottleQuota(req);
  }

  private PathPatternTree filterPathPatternTree(PathPatternTree patternTree, String storageGroup) {
    PathPatternTree filteredPatternTree = new PathPatternTree();
    try {
      PartialPath storageGroupPattern =
          new PartialPath(storageGroup).concatNode(MULTI_LEVEL_PATH_WILDCARD);
      for (PartialPath pathPattern : patternTree.getOverlappedPathPatterns(storageGroupPattern)) {
        filteredPatternTree.appendPathPattern(pathPattern);
      }
      filteredPatternTree.constructTree();
    } catch (IllegalPathException e) {
      // won't reach here
    }
    return filteredPatternTree;
  }

  @Override
  public THeartbeatResp getDataNodeHeartBeat(THeartbeatReq req) throws TException {
    THeartbeatResp resp = new THeartbeatResp();

    // Judging leader if necessary
    if (req.isNeedJudgeLeader()) {
      resp.setJudgedLeaders(getJudgedLeaders());
    }

    // Sampling load if necessary
    if (req.isNeedSamplingLoad()) {
      TLoadSample loadSample = new TLoadSample();

      // Sample cpu load
      double cpuLoad =
          MetricService.getInstance()
              .getAutoGauge(
                  Metric.SYS_CPU_LOAD.toString(), MetricLevel.CORE, Tag.NAME.toString(), "system")
              .value();
      if (cpuLoad != 0) {
        loadSample.setCpuUsageRate(cpuLoad);
      }

      // Sample memory load
      double usedMemory = getMemory("jvm.memory.used.bytes");
      double maxMemory = getMemory("jvm.memory.max.bytes");
      if (usedMemory != 0 && maxMemory != 0) {
        loadSample.setMemoryUsageRate(usedMemory * 100 / maxMemory);
      }

      // Sample disk load
      sampleDiskLoad(loadSample);

      resp.setLoadSample(loadSample);
    }

    resp.setHeartbeatTimestamp(req.getHeartbeatTimestamp());
    resp.setStatus(CommonDescriptor.getInstance().getConfig().getNodeStatus().getStatus());
    if (CommonDescriptor.getInstance().getConfig().getStatusReason() != null) {
      resp.setStatusReason(CommonDescriptor.getInstance().getConfig().getStatusReason());
    }
    if (req.getSchemaRegionIds() != null) {
      spaceQuotaManager.updateSpaceQuotaUsage(req.getSpaceQuotaUsage());
      resp.setRegionDeviceNumMap(
          schemaEngine.countDeviceNumBySchemaRegion(req.getSchemaRegionIds()));
      resp.setRegionTimeSeriesNumMap(
          schemaEngine.countTimeSeriesNumBySchemaRegion(req.getSchemaRegionIds()));
    }
    if (req.getDataRegionIds() != null) {
      spaceQuotaManager.setDataRegionIds(req.getDataRegionIds());
      resp.setRegionDisk(spaceQuotaManager.getRegionDisk());
    }
    // Update schema quota if necessary
    SchemaEngine.getInstance().updateAndFillSchemaCountMap(req.schemaQuotaCount, resp);

    // Update pipe meta if necessary
    PipeAgent.task().collectPipeMetaList(req, resp);

    return resp;
  }

  @Override
  public TSStatus updateRegionCache(TRegionRouteReq req) throws TException {
    boolean result = ClusterPartitionFetcher.getInstance().updateRegionCache(req);
    if (result) {
      return RpcUtils.getStatus(TSStatusCode.SUCCESS_STATUS);
    } else {
      return RpcUtils.getStatus(TSStatusCode.PARTITION_CACHE_UPDATE_ERROR);
    }
  }

  private Map<TConsensusGroupId, Boolean> getJudgedLeaders() {
    Map<TConsensusGroupId, Boolean> result = new HashMap<>();
    if (DataRegionConsensusImpl.getInstance() != null) {
      DataRegionConsensusImpl.getInstance()
          .getAllConsensusGroupIds()
          .forEach(
              groupId -> {
                result.put(
                    groupId.convertToTConsensusGroupId(),
                    DataRegionConsensusImpl.getInstance().isLeader(groupId));
              });
    }

    if (SchemaRegionConsensusImpl.getInstance() != null) {
      SchemaRegionConsensusImpl.getInstance()
          .getAllConsensusGroupIds()
          .forEach(
              groupId -> {
                result.put(
                    groupId.convertToTConsensusGroupId(),
                    SchemaRegionConsensusImpl.getInstance().isLeader(groupId));
              });
    }
    return result;
  }

  private double getMemory(String gaugeName) {
    double result = 0d;
    try {
      //
      List<String> heapIds = Arrays.asList("PS Eden Space", "PS Old Eden", "Ps Survivor Space");
      List<String> noHeapIds = Arrays.asList("Code Cache", "Compressed Class Space", "Metaspace");

      for (String id : heapIds) {
        AutoGauge gauge =
            MetricService.getInstance()
                .getAutoGauge(gaugeName, MetricLevel.IMPORTANT, "id", id, "area", "heap");
        result += gauge.value();
      }
      for (String id : noHeapIds) {
        AutoGauge gauge =
            MetricService.getInstance()
                .getAutoGauge(gaugeName, MetricLevel.IMPORTANT, "id", id, "area", "noheap");
        result += gauge.value();
      }
    } catch (Exception e) {
      LOGGER.warn("Failed to get memory from metric because: ", e);
      return 0d;
    }
    return result;
  }

  private void sampleDiskLoad(TLoadSample loadSample) {
    final CommonConfig commonConfig = CommonDescriptor.getInstance().getConfig();

    double freeDisk =
        MetricService.getInstance()
            .getAutoGauge(
                Metric.SYS_DISK_FREE_SPACE.toString(),
                MetricLevel.CORE,
                Tag.NAME.toString(),
                "system")
            .value();
    double totalDisk =
        MetricService.getInstance()
            .getAutoGauge(
                Metric.SYS_DISK_TOTAL_SPACE.toString(),
                MetricLevel.CORE,
                Tag.NAME.toString(),
                "system")
            .value();

    if (freeDisk != 0 && totalDisk != 0) {
      double freeDiskRatio = freeDisk / totalDisk;
      loadSample.setFreeDiskSpace(freeDisk);
      loadSample.setDiskUsageRate(1d - freeDiskRatio);
      // Reset NodeStatus if necessary
      if (freeDiskRatio < commonConfig.getDiskSpaceWarningThreshold()) {
        LOGGER.warn(
            "The remaining disk usage ratio:{} is less than disk_spec_warning_threshold:{}, set system to readonly!",
            freeDiskRatio,
            commonConfig.getDiskSpaceWarningThreshold());
        commonConfig.setNodeStatus(NodeStatus.ReadOnly);
        commonConfig.setStatusReason(NodeStatus.DISK_FULL);
      }
    }
  }

  @Override
  public TSStatus invalidatePermissionCache(TInvalidatePermissionCacheReq req) {
    if (AuthorizerManager.getInstance().invalidateCache(req.getUsername(), req.getRoleName())) {
      return RpcUtils.getStatus(TSStatusCode.SUCCESS_STATUS);
    }
    return RpcUtils.getStatus(TSStatusCode.CLEAR_PERMISSION_CACHE_ERROR);
  }

  @Override
  public TSStatus merge() throws TException {
    try {
      storageEngine.mergeAll();
    } catch (StorageEngineException e) {
      return RpcUtils.getStatus(TSStatusCode.EXECUTE_STATEMENT_ERROR, e.getMessage());
    }
    return RpcUtils.getStatus(TSStatusCode.SUCCESS_STATUS);
  }

  @Override
  public TSStatus flush(TFlushReq req) throws TException {
    try {
      storageEngine.operateFlush(req);
    } catch (Exception e) {
      return RpcUtils.getStatus(TSStatusCode.EXECUTE_STATEMENT_ERROR, e.getMessage());
    }
    return RpcUtils.getStatus(TSStatusCode.SUCCESS_STATUS);
  }

  @Override
  public TSStatus clearCache() throws TException {
    try {
      storageEngine.clearCache();
    } catch (Exception e) {
      return RpcUtils.getStatus(TSStatusCode.EXECUTE_STATEMENT_ERROR, e.getMessage());
    }
    return RpcUtils.getStatus(TSStatusCode.SUCCESS_STATUS);
  }

  @Override
  public TSStatus settle(TSettleReq req) throws TException {
    return SettleRequestHandler.getInstance().handleSettleRequest(req);
  }

  @Override
  public TSStatus loadConfiguration() throws TException {
    try {
      IoTDBDescriptor.getInstance().loadHotModifiedProps();
    } catch (Exception e) {
      return RpcUtils.getStatus(TSStatusCode.EXECUTE_STATEMENT_ERROR, e.getMessage());
    }
    return RpcUtils.getStatus(TSStatusCode.SUCCESS_STATUS);
  }

  @Override
  public TSStatus setSystemStatus(String status) throws TException {
    try {
      final CommonConfig commonConfig = CommonDescriptor.getInstance().getConfig();
      commonConfig.setNodeStatus(NodeStatus.parse(status));
      if (commonConfig.getNodeStatus().equals(NodeStatus.Removing)) {
        PipeAgent.runtime().stop();
      }
    } catch (Exception e) {
      return RpcUtils.getStatus(TSStatusCode.EXECUTE_STATEMENT_ERROR, e.getMessage());
    }
    return RpcUtils.getStatus(TSStatusCode.SUCCESS_STATUS);
  }

  @Override
  public TSStatus killQueryInstance(String queryId) {
    Coordinator coordinator = Coordinator.getInstance();
    if (queryId == null) {
      coordinator.getAllQueryExecutions().forEach(IQueryExecution::cancel);
    } else {
      Optional<IQueryExecution> queryExecution =
          coordinator.getAllQueryExecutions().stream()
              .filter(iQueryExecution -> iQueryExecution.getQueryId().equals(queryId))
              .findAny();
      if (queryExecution.isPresent()) {
        queryExecution.get().cancel();
      } else {
        return new TSStatus(TSStatusCode.NO_SUCH_QUERY.getStatusCode()).setMessage("No such query");
      }
    }
    return new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
  }

  @Override
  public TSStatus setTTL(TSetTTLReq req) throws TException {
    return storageEngine.setTTL(req);
  }

  @Override
  public TSStatus updateConfigNodeGroup(TUpdateConfigNodeGroupReq req) {
    List<TConfigNodeLocation> configNodeLocations = req.getConfigNodeLocations();
    if (configNodeLocations != null) {
      ConfigNodeInfo.getInstance()
          .updateConfigNodeList(
              configNodeLocations
                  .parallelStream()
                  .map(TConfigNodeLocation::getInternalEndPoint)
                  .collect(Collectors.toList()));
    }
    return RpcUtils.getStatus(TSStatusCode.SUCCESS_STATUS);
  }

  @Override
  public TSStatus updateTemplate(TUpdateTemplateReq req) throws TException {
    switch (TemplateInternalRPCUpdateType.getType(req.type)) {
      case ADD_TEMPLATE_SET_INFO:
        ClusterTemplateManager.getInstance().addTemplateSetInfo(req.getTemplateInfo());
        break;
      case INVALIDATE_TEMPLATE_SET_INFO:
        ClusterTemplateManager.getInstance().invalidateTemplateSetInfo(req.getTemplateInfo());
        break;
      case ADD_TEMPLATE_PRE_SET_INFO:
        ClusterTemplateManager.getInstance().addTemplatePreSetInfo(req.getTemplateInfo());
        break;
      case COMMIT_TEMPLATE_SET_INFO:
        ClusterTemplateManager.getInstance().commitTemplatePreSetInfo(req.getTemplateInfo());
        break;
      case UPDATE_TEMPLATE_INFO:
        ClusterTemplateManager.getInstance().updateTemplateInfo(req.getTemplateInfo());
        break;
    }
    return RpcUtils.getStatus(TSStatusCode.SUCCESS_STATUS);
  }

  @Override
  public TSStatus deleteRegion(TConsensusGroupId tconsensusGroupId) {
    ConsensusGroupId consensusGroupId =
        ConsensusGroupId.Factory.createFromTConsensusGroupId(tconsensusGroupId);
    if (consensusGroupId instanceof DataRegionId) {
      ConsensusGenericResponse response =
          DataRegionConsensusImpl.getInstance().deletePeer(consensusGroupId);
      if (!response.isSuccess()
          && !(response.getException() instanceof PeerNotInConsensusGroupException)) {
        return RpcUtils.getStatus(
            TSStatusCode.DELETE_REGION_ERROR, response.getException().getMessage());
      }
      return regionManager.deleteDataRegion((DataRegionId) consensusGroupId);
    } else {
      ConsensusGenericResponse response =
          SchemaRegionConsensusImpl.getInstance().deletePeer(consensusGroupId);
      if (!response.isSuccess()
          && !(response.getException() instanceof PeerNotInConsensusGroupException)) {
        return RpcUtils.getStatus(
            TSStatusCode.DELETE_REGION_ERROR, response.getException().getMessage());
      }
      return regionManager.deleteSchemaRegion((SchemaRegionId) consensusGroupId);
    }
  }

  @Override
  public TSStatus changeRegionLeader(TRegionLeaderChangeReq req) {
    LOGGER.info("[ChangeRegionLeader] {}", req);
    TSStatus status = new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
    TConsensusGroupId tgId = req.getRegionId();
    ConsensusGroupId regionId = ConsensusGroupId.Factory.createFromTConsensusGroupId(tgId);
    TEndPoint newNode = getConsensusEndPoint(req.getNewLeaderNode(), regionId);
    Peer newLeaderPeer = new Peer(regionId, req.getNewLeaderNode().getDataNodeId(), newNode);

    if (isLeader(regionId)) {
      String msg =
          "[ChangeRegionLeader] The current DataNode: "
              + req.getNewLeaderNode().getDataNodeId()
              + " is already the leader of RegionGroup: "
              + regionId
              + ", skip leader transfer.";
      LOGGER.info(msg);
      return status.setMessage(msg);
    }

    LOGGER.info(
        "[ChangeRegionLeader] Start change the leader of RegionGroup: {} to DataNode: {}",
        regionId,
        req.getNewLeaderNode().getDataNodeId());
    return transferLeader(regionId, newLeaderPeer);
  }

  private TSStatus transferLeader(ConsensusGroupId regionId, Peer newLeaderPeer) {
    TSStatus status = new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
    ConsensusGenericResponse resp;
    if (regionId instanceof DataRegionId) {
      resp = DataRegionConsensusImpl.getInstance().transferLeader(regionId, newLeaderPeer);
    } else if (regionId instanceof SchemaRegionId) {
      resp = SchemaRegionConsensusImpl.getInstance().transferLeader(regionId, newLeaderPeer);
    } else {
      status.setCode(TSStatusCode.REGION_LEADER_CHANGE_ERROR.getStatusCode());
      status.setMessage("[ChangeRegionLeader] Error Region type: " + regionId);
      return status;
    }

    if (!resp.isSuccess()) {
      LOGGER.warn(
          "[ChangeRegionLeader] Failed to change the leader of RegionGroup: {}",
          regionId,
          resp.getException());
      status.setCode(TSStatusCode.REGION_LEADER_CHANGE_ERROR.getStatusCode());
      status.setMessage(resp.getException().getMessage());
      return status;
    }
    status.setMessage(
        "[ChangeRegionLeader] Successfully change the leader of RegionGroup: "
            + regionId
            + " to "
            + newLeaderPeer.getNodeId());
    return status;
  }

  private boolean isLeader(ConsensusGroupId regionId) {
    if (regionId instanceof DataRegionId) {
      return DataRegionConsensusImpl.getInstance().isLeader(regionId);
    }
    if (regionId instanceof SchemaRegionId) {
      return SchemaRegionConsensusImpl.getInstance().isLeader(regionId);
    }
    LOGGER.warn("region {} type is illegal", regionId);
    return false;
  }

  @Override
  public TSStatus createNewRegionPeer(TCreatePeerReq req) {
    ConsensusGroupId regionId =
        ConsensusGroupId.Factory.createFromTConsensusGroupId(req.getRegionId());
    List<Peer> peers =
        req.getRegionLocations().stream()
            .map(
                location ->
                    new Peer(
                        regionId,
                        location.getDataNodeId(),
                        getConsensusEndPoint(location, regionId)))
            .collect(Collectors.toList());
    TSStatus status = createNewRegion(regionId, req.getStorageGroup(), req.getTtl());
    if (!isSucceed(status)) {
      return status;
    }
    return createNewRegionPeer(regionId, peers);
  }

  @Override
  public TSStatus addRegionPeer(TMaintainPeerReq req) throws TException {
    TConsensusGroupId regionId = req.getRegionId();
    String selectedDataNodeIP = req.getDestNode().getInternalEndPoint().getIp();
    boolean submitSucceed = RegionMigrateService.getInstance().submitAddRegionPeerTask(req);
    TSStatus status = new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
    if (submitSucceed) {
      LOGGER.info(
          "Successfully submit addRegionPeer task for region: {}, target DataNode: {}",
          regionId,
          selectedDataNodeIP);
      return status;
    }
    status.setCode(TSStatusCode.MIGRATE_REGION_ERROR.getStatusCode());
    status.setMessage("Submit addRegionPeer task failed, region: " + regionId);
    return status;
  }

  @Override
  public TSStatus removeRegionPeer(TMaintainPeerReq req) throws TException {
    TConsensusGroupId regionId = req.getRegionId();
    String selectedDataNodeIP = req.getDestNode().getInternalEndPoint().getIp();
    boolean submitSucceed = RegionMigrateService.getInstance().submitRemoveRegionPeerTask(req);
    TSStatus status = new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
    if (submitSucceed) {
      LOGGER.info(
          "Successfully submit removeRegionPeer task for region: {}, DataNode to be removed: {}",
          regionId,
          selectedDataNodeIP);
      return status;
    }
    status.setCode(TSStatusCode.MIGRATE_REGION_ERROR.getStatusCode());
    status.setMessage("Submit removeRegionPeer task failed, region: " + regionId);
    return status;
  }

  @Override
  public TSStatus deleteOldRegionPeer(TMaintainPeerReq req) throws TException {
    TConsensusGroupId regionId = req.getRegionId();
    String selectedDataNodeIP = req.getDestNode().getInternalEndPoint().getIp();
    boolean submitSucceed = RegionMigrateService.getInstance().submitDeleteOldRegionPeerTask(req);
    TSStatus status = new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
    if (submitSucceed) {
      LOGGER.info(
          "Successfully submit deleteOldRegionPeer task for region: {}, DataNode to be removed: {}",
          regionId,
          selectedDataNodeIP);
      return status;
    }
    status.setCode(TSStatusCode.MIGRATE_REGION_ERROR.getStatusCode());
    status.setMessage("Submit deleteOldRegionPeer task failed, region: " + regionId);
    return status;
  }

  private TSStatus createNewRegion(ConsensusGroupId regionId, String storageGroup, long ttl) {
    return regionManager.createNewRegion(regionId, storageGroup, ttl);
  }

  @Override
  public TSStatus createFunction(TCreateFunctionInstanceReq req) {
    try {
      UDFInformation udfInformation = UDFInformation.deserialize(req.udfInformation);
      UDFManagementService.getInstance().register(udfInformation, req.jarFile);
      return new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
    } catch (Exception e) {
      return new TSStatus(TSStatusCode.CREATE_UDF_ON_DATANODE_ERROR.getStatusCode())
          .setMessage(e.getMessage());
    }
  }

  @Override
  public TSStatus dropFunction(TDropFunctionInstanceReq req) {
    try {
      UDFManagementService.getInstance().deregister(req.getFunctionName(), req.isNeedToDeleteJar());
      return new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
    } catch (Exception e) {
      return new TSStatus(TSStatusCode.DROP_UDF_ON_DATANODE_ERROR.getStatusCode())
          .setMessage(e.getMessage());
    }
  }

  @Override
  public TSStatus createTriggerInstance(TCreateTriggerInstanceReq req) throws TException {
    TriggerInformation triggerInformation = TriggerInformation.deserialize(req.triggerInformation);
    try {
      // register trigger information with TriggerRegistrationService
      // config nodes take responsibility for synchronization control
      TriggerManagementService.getInstance().register(triggerInformation, req.jarFile);
    } catch (Exception e) {
      LOGGER.warn(
          "Error occurred when creating trigger instance for trigger: {}. The cause is {}.",
          triggerInformation.getTriggerName(),
          e);
      return new TSStatus(TSStatusCode.CREATE_TRIGGER_INSTANCE_ERROR.getStatusCode())
          .setMessage(e.getMessage());
    }
    return new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
  }

  @Override
  public TSStatus activeTriggerInstance(TActiveTriggerInstanceReq req) throws TException {
    try {
      TriggerManagementService.getInstance().activeTrigger(req.triggerName);
    } catch (Exception e) {
      LOGGER.warn(
          "Error occurred during active trigger instance for trigger: {}. The cause is {}.",
          req.triggerName,
          e);
      return new TSStatus(TSStatusCode.ACTIVE_TRIGGER_INSTANCE_ERROR.getStatusCode())
          .setMessage(e.getMessage());
    }
    return new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
  }

  @Override
  public TSStatus inactiveTriggerInstance(TInactiveTriggerInstanceReq req) throws TException {
    try {
      TriggerManagementService.getInstance().inactiveTrigger(req.triggerName);
    } catch (Exception e) {
      LOGGER.warn(
          "Error occurred when try to inactive trigger instance for trigger: {}. The cause is {}. ",
          req.triggerName,
          e);
      return new TSStatus(TSStatusCode.EXECUTE_STATEMENT_ERROR.getStatusCode())
          .setMessage(e.getMessage());
    }

    return new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
  }

  @Override
  public TSStatus dropTriggerInstance(TDropTriggerInstanceReq req) throws TException {
    try {
      TriggerManagementService.getInstance().dropTrigger(req.triggerName, req.needToDeleteJarFile);
    } catch (Exception e) {
      LOGGER.warn(
          "Error occurred when dropping trigger instance for trigger: {}. The cause is {}.",
          req.triggerName,
          e);
      return new TSStatus(TSStatusCode.DROP_TRIGGER_INSTANCE_ERROR.getStatusCode())
          .setMessage(e.getMessage());
    }
    return new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
  }

  @Override
  public TSStatus updateTriggerLocation(TUpdateTriggerLocationReq req) throws TException {
    try {
      TriggerManagementService.getInstance()
          .updateLocationOfStatefulTrigger(req.triggerName, req.newLocation);
    } catch (Exception e) {
      LOGGER.warn(
          "Error occurred when updating Location for trigger: {}. The cause is {}.",
          req.triggerName,
          e);
      return new TSStatus(TSStatusCode.UPDATE_TRIGGER_LOCATION_ERROR.getStatusCode())
          .setMessage(e.getMessage());
    }
    return new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
  }

  @Override
  public TFireTriggerResp fireTrigger(TFireTriggerReq req) {
    String triggerName = req.getTriggerName();
    TriggerExecutor executor = TriggerManagementService.getInstance().getExecutor(triggerName);
    // no executor for given trigger name on this data node
    if (executor == null) {
      return new TFireTriggerResp(false, TriggerFireResult.FAILED_NO_TERMINATION.getId());
    }
    TriggerFireResult result = TriggerFireResult.SUCCESS;
    try {
      boolean fireResult =
          executor.fire(
              Tablet.deserialize(req.tablet), TriggerEvent.construct(req.getTriggerEvent()));
      if (!fireResult) {
        result =
            executor.getFailureStrategy().equals(FailureStrategy.PESSIMISTIC)
                ? TriggerFireResult.TERMINATION
                : TriggerFireResult.FAILED_NO_TERMINATION;
      }
    } catch (Exception e) {
      result =
          executor.getFailureStrategy().equals(FailureStrategy.PESSIMISTIC)
              ? TriggerFireResult.TERMINATION
              : TriggerFireResult.FAILED_NO_TERMINATION;
    }
    return new TFireTriggerResp(true, result.getId());
  }

  private TEndPoint getConsensusEndPoint(
      TDataNodeLocation nodeLocation, ConsensusGroupId regionId) {
    if (regionId instanceof DataRegionId) {
      return nodeLocation.getDataRegionConsensusEndPoint();
    }
    return nodeLocation.getSchemaRegionConsensusEndPoint();
  }

  @Override
  public TSStatus createPipePlugin(TCreatePipePluginInstanceReq req) {
    try {
      PipePluginMeta pipePluginMeta = PipePluginMeta.deserialize(req.pipePluginMeta);
      PipeAgent.plugin().register(pipePluginMeta, req.jarFile);
      return new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
    } catch (Exception e) {
      return new TSStatus(TSStatusCode.CREATE_PIPE_PLUGIN_ON_DATANODE_ERROR.getStatusCode())
          .setMessage(e.getMessage());
    }
  }

  @Override
  public TSStatus dropPipePlugin(TDropPipePluginInstanceReq req) {
    try {
      PipeAgent.plugin().deregister(req.getPipePluginName(), req.isNeedToDeleteJar());
      return new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
    } catch (Exception e) {
      return new TSStatus(TSStatusCode.DROP_PIPE_PLUGIN_ON_DATANODE_ERROR.getStatusCode())
          .setMessage(e.getMessage());
    }
  }

  private boolean isSucceed(TSStatus status) {
    return status.getCode() == TSStatusCode.SUCCESS_STATUS.getStatusCode();
  }

  private TSStatus createNewRegionPeer(ConsensusGroupId regionId, List<Peer> peers) {
    LOGGER.info(
        "{}, Start to createNewRegionPeer {} to region {}",
        REGION_MIGRATE_PROCESS,
        peers,
        regionId);
    TSStatus status = new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
    ConsensusGenericResponse resp;
    if (regionId instanceof DataRegionId) {
      resp = DataRegionConsensusImpl.getInstance().createPeer(regionId, peers);
    } else {
      resp = SchemaRegionConsensusImpl.getInstance().createPeer(regionId, peers);
    }
    if (!resp.isSuccess()) {
      LOGGER.warn(
          "{}, CreateNewRegionPeer error, peers: {}, regionId: {}, errorMessage",
          REGION_MIGRATE_PROCESS,
          peers,
          regionId,
          resp.getException());
      status.setCode(TSStatusCode.MIGRATE_REGION_ERROR.getStatusCode());
      status.setMessage(resp.getException().getMessage());
      return status;
    }
    LOGGER.info(
        "{}, Succeed to createNewRegionPeer {} for region {}",
        REGION_MIGRATE_PROCESS,
        peers,
        regionId);
    status.setMessage("createNewRegionPeer succeed, regionId: " + regionId);
    return status;
  }

  @Override
  public TSStatus disableDataNode(TDisableDataNodeReq req) throws TException {
    LOGGER.info("start disable data node in the request: {}", req);
    TSStatus status = new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
    status.setMessage("disable datanode succeed");
    // TODO what need to clean?
    ClusterPartitionFetcher.getInstance().invalidAllCache();
    DataNodeSchemaCache.getInstance().takeWriteLock();
    try {
      DataNodeSchemaCache.getInstance().cleanUp();
    } finally {
      DataNodeSchemaCache.getInstance().releaseWriteLock();
    }
    DataNodeDevicePathCache.getInstance().cleanUp();
    return status;
  }

  @Override
  public TSStatus stopDataNode() {
    TSStatus status = new TSStatus(TSStatusCode.SUCCESS_STATUS.getStatusCode());
    LOGGER.info("Execute stopDataNode RPC method");

    // kill the datanode process 20 seconds later
    // because datanode process cannot exit normally for the reason of InterruptedException
    new Thread(
            () -> {
              try {
                TimeUnit.SECONDS.sleep(20);
              } catch (InterruptedException e) {
                LOGGER.warn("Meets InterruptedException in stopDataNode RPC method");
              } finally {
                LOGGER.info("Executing system.exit(0) in stopDataNode RPC method after 20 seconds");
                System.exit(0);
              }
            })
        .start();

    try {
      DataNode.getInstance().stop();
      status.setMessage("stop datanode succeed");
    } catch (Exception e) {
      LOGGER.warn("Stop Data Node error", e);
      status.setCode(TSStatusCode.DATANODE_STOP_ERROR.getStatusCode());
      status.setMessage(e.getMessage());
    }
    return status;
  }

  public void handleClientExit() {}
}
