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

/*
 * 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.queryengine.plan.execution.config.metadata;

import org.apache.iotdb.common.rpc.thrift.TTimePartitionSlot;
import org.apache.iotdb.commons.conf.CommonDescriptor;
import org.apache.iotdb.confignode.rpc.thrift.TGetTimeSlotListResp;
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.GetTimeSlotListStatement;
import org.apache.iotdb.db.utils.DateTimeUtils;
import org.apache.iotdb.rpc.TSStatusCode;

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

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

public class GetTimeSlotListTask implements IConfigTask {

  private final GetTimeSlotListStatement getTimeSlotListStatement;

  public GetTimeSlotListTask(GetTimeSlotListStatement getTimeSlotListStatement) {
    this.getTimeSlotListStatement = getTimeSlotListStatement;
  }

  @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.getTimeSlotList(getTimeSlotListStatement);
  }

  public static void buildTSBlockRow(TsBlockBuilder builder, TTimePartitionSlot timePartitionSlot) {
    builder.getTimeColumnBuilder().writeLong(0L);
    builder
        .getColumnBuilder(0)
        .writeLong(
            timePartitionSlot.getStartTime()
                / CommonDescriptor.getInstance().getConfig().getTimePartitionInterval());
    builder
        .getColumnBuilder(1)
        .writeBinary(
            new Binary(
                DateTimeUtils.convertLongToDate(timePartitionSlot.getStartTime()),
                TSFileConfig.STRING_CHARSET));
    builder.declarePosition();
  }

  public static void buildTSBlock(
      TGetTimeSlotListResp getTimeSlotListResp, SettableFuture<ConfigTaskResult> future) {
    List<TSDataType> outputDataTypes =
        ColumnHeaderConstant.getTimeSlotListColumnHeaders.stream()
            .map(ColumnHeader::getColumnType)
            .collect(Collectors.toList());
    TsBlockBuilder builder = new TsBlockBuilder(outputDataTypes);

    getTimeSlotListResp.getTimeSlotList().forEach(e -> buildTSBlockRow(builder, e));

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