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

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

import org.apache.iotdb.confignode.rpc.thrift.TDataNodeInfo;
import org.apache.iotdb.confignode.rpc.thrift.TShowDataNodesResp;
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.ShowDataNodesStatement;
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 org.apache.iotdb.tsfile.utils.BytesUtils;

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 ShowDataNodesTask implements IConfigTask {

  private ShowDataNodesStatement showDataNodesStatement;

  public ShowDataNodesTask() {}

  public ShowDataNodesTask(ShowDataNodesStatement showDataNodesStatement) {
    this.showDataNodesStatement = showDataNodesStatement;
  }

  @Override
  public ListenableFuture<ConfigTaskResult> execute(IConfigTaskExecutor configTaskExecutor)
      throws InterruptedException {
    return configTaskExecutor.showDataNodes(showDataNodesStatement);
  }

  public static void buildTSBlock(
      TShowDataNodesResp showDataNodesResp, SettableFuture<ConfigTaskResult> future) {
    List<TSDataType> outputDataTypes =
        ColumnHeaderConstant.showDataNodesColumnHeaders.stream()
            .map(ColumnHeader::getColumnType)
            .collect(Collectors.toList());
    TsBlockBuilder builder = new TsBlockBuilder(outputDataTypes);
    if (showDataNodesResp.getDataNodesInfoList() != null) {
      for (TDataNodeInfo dataNodeInfo : showDataNodesResp.getDataNodesInfoList()) {
        builder.getTimeColumnBuilder().writeLong(0L);
        builder.getColumnBuilder(0).writeInt(dataNodeInfo.getDataNodeId());
        builder
            .getColumnBuilder(1)
            .writeBinary(
                BytesUtils.valueOf(
                    dataNodeInfo.getStatus() == null ? "" : dataNodeInfo.getStatus()));

        builder.getColumnBuilder(2).writeBinary(BytesUtils.valueOf(dataNodeInfo.getRpcAddresss()));
        builder.getColumnBuilder(3).writeInt(dataNodeInfo.getRpcPort());
        builder.getColumnBuilder(4).writeInt(dataNodeInfo.getDataRegionNum());

        builder.getColumnBuilder(5).writeInt(dataNodeInfo.getSchemaRegionNum());
        builder.declarePosition();
      }
    }
    DatasetHeader datasetHeader = DatasetHeaderFactory.getShowDataNodesHeader();
    future.set(new ConfigTaskResult(TSStatusCode.SUCCESS_STATUS, builder.build(), datasetHeader));
  }
}