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

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

import org.apache.iotdb.common.rpc.thrift.TSeriesPartitionSlot;
import org.apache.iotdb.confignode.rpc.thrift.TGetSeriesSlotListResp;
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.GetSeriesSlotListStatement;
import org.apache.iotdb.rpc.TSStatusCode;
import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
import org.apache.iotdb.tsfile.read.common.block.TsBlockBuilder;

import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.SettableFuture;

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

public class GetSeriesSlotListTask implements IConfigTask {

  private final GetSeriesSlotListStatement getSeriesSlotListStatement;

  public GetSeriesSlotListTask(GetSeriesSlotListStatement getSeriesSlotListStatement) {
    this.getSeriesSlotListStatement = getSeriesSlotListStatement;
  }

  @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.getSeriesSlotList(getSeriesSlotListStatement);
  }

  public static void buildTsBlock(
      TsBlockBuilder builder, TSeriesPartitionSlot tSeriesPartitionSlot) {
    builder.getTimeColumnBuilder().writeLong(0L);
    builder.getColumnBuilder(0).writeInt(tSeriesPartitionSlot.getSlotId());
    builder.declarePosition();
  }

  public static void buildTsBlock(
      TGetSeriesSlotListResp getSeriesSlotListResp, SettableFuture<ConfigTaskResult> future) {
    List<TSDataType> outputDataTypes =
        ColumnHeaderConstant.getSeriesSlotListColumnHeaders.stream()
            .map(ColumnHeader::getColumnType)
            .collect(Collectors.toList());
    TsBlockBuilder builder = new TsBlockBuilder(outputDataTypes);

    getSeriesSlotListResp.getSeriesSlotList().forEach(e -> buildTsBlock(builder, e));

    DatasetHeader datasetHeader = DatasetHeaderFactory.getGetSeriesSlotListHeader();
    future.set(new ConfigTaskResult(TSStatusCode.SUCCESS_STATUS, builder.build(), datasetHeader));
  }
}