iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/execution/config/metadata/CountTimeSlotListTask.java

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 * 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
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package org.apache.iotdb.db.queryengine.plan.execution.config.metadata;

import org.apache.iotdb.confignode.rpc.thrift.TCountTimeSlotListResp;
import org.apache.iotdb.db.queryengine.common.header.ColumnHeader;
import org.apache.iotdb.db.queryengine.common.header.ColumnHeaderConstant;
import org.apache.iotdb.db.queryengine.common.header.DatasetHeader;
import org.apache.iotdb.db.queryengine.common.header.DatasetHeaderFactory;
import org.apache.iotdb.db.queryengine.plan.execution.config.ConfigTaskResult;
import org.apache.iotdb.db.queryengine.plan.execution.config.IConfigTask;
import org.apache.iotdb.db.queryengine.plan.execution.config.executor.IConfigTaskExecutor;
import org.apache.iotdb.db.queryengine.plan.statement.metadata.CountTimeSlotListStatement;
import org.apache.iotdb.rpc.TSStatusCode;

import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.SettableFuture;
import org.apache.tsfile.enums.TSDataType;
import org.apache.tsfile.read.common.block.TsBlockBuilder;

import java.util.List;
import java.util.stream.Collectors;

public class CountTimeSlotListTask implements IConfigTask {

  private final CountTimeSlotListStatement countTimeSlotListStatement;

  public CountTimeSlotListTask(CountTimeSlotListStatement countTimeSlotListStatement) {
    this.countTimeSlotListStatement = countTimeSlotListStatement;
  }

  @Override
  public ListenableFuture<ConfigTaskResult> execute(IConfigTaskExecutor configTaskExecutor) {
    // If the action is executed successfully, return the Future.
    // If your operation is async, you can return the corresponding future directly.
    return configTaskExecutor.countTimeSlotList(countTimeSlotListStatement);
  }

  public static void buildTSBlock(
      TCountTimeSlotListResp countTimeSlotListResp, SettableFuture<ConfigTaskResult> future) {
    List<TSDataType> outputDataTypes =
        ColumnHeaderConstant.countTimeSlotListColumnHeaders.stream()
            .map(ColumnHeader::getColumnType)
            .collect(Collectors.toList());
    TsBlockBuilder builder = new TsBlockBuilder(outputDataTypes);
    builder.getTimeColumnBuilder().writeLong(0L);
    builder.getColumnBuilder(0).writeLong(countTimeSlotListResp.getCount());
    builder.declarePosition();
    DatasetHeader datasetHeader = DatasetHeaderFactory.getCountTimeSlotListHeader();
    future.set(new ConfigTaskResult(TSStatusCode.SUCCESS_STATUS, builder.build(), datasetHeader));
  }
}