一.简介：

本文将完成一个真实业务中的设备上报数据的一个例子，完整的展示后台服务接收到设备上报的数据后，将数据添加到时序数据库，并且将数据查询出来的一个例子。本文所有代码已经上传GitHub：https://github.com/Tom-shushu/work-study 下的 iotdb-demo 下。

IoTDB 是针对时间序列数据收集、存储与分析一体化的数据管理引擎。它具有体量轻、性能高、易使用的特点，完美对接 Hadoop 与 Spark 生态，适用于工业物联网应用中海量时间序列数据高速写入和复杂分析查询的需求。

我的理解：它就是一个树形结构的数据库可以很灵活的查询各个级下面的数据，因为它特殊的数据结构也使得它的查询效率会更高一些。

二.Docker安装IotDB:

1.拉取镜像（使用0.13,在使用的过程中0.14在查询时出现了问题）

docker pull apache/iotdb:0.13.1-node

2.创建数据文件和日志的 docker 挂载目录 (docker volume)

docker volume create mydata
docker volume create mylogs

3.直接运行镜像

docker run --name iotdb  -p 6667:6667 -v mydata:/iotdb/data -v mylogs:/iotdb/logs -d apache/iotdb:0.13.1-node /iotdb/bin/start-server.sh

4.进入镜像并且登录IotDB

docker exec  -it iotdb  /bin/bash
/iotdb/sbin/start-cli.sh -h localhost -p 6667 -u root -pw root

这样就算安装完成，然后打开服务器6667安全组

三.IotDB与SpringBoot集成

1.引入必要的依赖

　　　　<dependency>
            <groupId>org.apache.iotdb</groupId>
            <artifactId>iotdb-session</artifactId>
            <version>0.14.0-preview1</version>
        </dependency>

        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.6.3</version>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.83</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

2.编写配置类并且封装对应的方法 IotDBSessionConfig

package com.zhouhong.iotdbdemo.config;

import lombok.extern.log4j.Log4j2;
import org.apache.iotdb.rpc.IoTDBConnectionException;
import org.apache.iotdb.rpc.StatementExecutionException;
import org.apache.iotdb.session.Session;
import org.apache.iotdb.session.SessionDataSet;
import org.apache.iotdb.session.util.Version;
import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
import org.apache.iotdb.tsfile.write.record.Tablet;
import org.apache.iotdb.tsfile.write.schema.MeasurementSchema;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;

import java.rmi.ServerException;
import java.util.ArrayList;
import java.util.List;

/**
 * description: iotdb 配置工具类（常用部分，如需要可以自行扩展）
 * 注意：可以不需要创建分组，插入时默认前两个节点名称为分组名称 比如： root.a1eaKSRpRty.CA3013A303A25467 或者
 * root.a1eaKSRpRty.CA3013A303A25467.heart  他们的分组都为 root.a1eaKSRpRty
 * author: zhouhong
 */
@Log4j2
@Component
@Configuration
public class IotDBSessionConfig {

    private static Session session;
    private static final String LOCAL_HOST = "XXX.XX.XXX.XX";
    @Bean
    public Session getSession() throws IoTDBConnectionException, StatementExecutionException {
        if (session == null) {
            log.info("正在连接iotdb.......");
            session = new Session.Builder().host(LOCAL_HOST).port(6667).username("root").password("root").version(Version.V_0_13).build();
            session.open(false);
            session.setFetchSize(100);
            log.info("iotdb连接成功~");
            // 设置时区
            session.setTimeZone("+08:00");
        }
        return session;
    }

    /**
     * description: 带有数据类型的添加操作 - insertRecord没有指定类型
     * author: zhouhong
     * @param  * @param deviceId:节点路径如：root.a1eaKSRpRty.CA3013A303A25467
     *                  time:时间戳
     *                  measurementsList：物理量 即：属性
     *                  type：数据类型： BOOLEAN((byte)0), INT32((byte)1),INT64((byte)2),FLOAT((byte)3),DOUBLE((byte)4),TEXT((byte)5),VECTOR((byte)6);
     *                  valuesList：属性值 --- 属性必须与属性值一一对应
     * @return
     */
    public void insertRecordType(String deviceId, Long time,List<String>  measurementsList, TSDataType type,List<Object> valuesList) throws StatementExecutionException, IoTDBConnectionException, ServerException {
        if (measurementsList.size() != valuesList.size()) {
            throw new ServerException("measurementsList 与 valuesList 值不对应");
        }
        List<TSDataType> types = new ArrayList<>();
        measurementsList.forEach(item -> {
            types.add(type);
        });
        session.insertRecord(deviceId, time, measurementsList, types, valuesList);
    }
    /**
     * description: 带有数据类型的添加操作 - insertRecord没有指定类型
     * author: zhouhong
     * @param  deviceId:节点路径如：root.a1eaKSRpRty.CA3013A303A25467
     * @param  time:时间戳
     * @param  measurementsList：物理量 即：属性
     * @param  valuesList：属性值 --- 属性必须与属性值一一对应
     * @return
     */
    public void insertRecord(String deviceId, Long time,List<String>  measurementsList, List<String> valuesList) throws StatementExecutionException, IoTDBConnectionException, ServerException {
        if (measurementsList.size() == valuesList.size()) {
            session.insertRecord(deviceId, time, measurementsList, valuesList);
        } else {
            log.error("measurementsList 与 valuesList 值不对应");
        }
    }
    /**
     * description: 批量插入
     * author: zhouhong
     */
    public void insertRecords(List<String> deviceIdList, List<Long> timeList, List<List<String>> measurementsList, List<List<String>> valuesList) throws StatementExecutionException, IoTDBConnectionException, ServerException {
        if (measurementsList.size() == valuesList.size()) {
            session.insertRecords(deviceIdList, timeList, measurementsList, valuesList);
        } else {
            log.error("measurementsList 与 valuesList 值不对应");
        }
    }

    /**
     * description: 插入操作
     * author: zhouhong
     * @param  deviceId:节点路径如：root.a1eaKSRpRty.CA3013A303A25467
     *  @param  time:时间戳
     *  @param  schemaList: 属性值 + 数据类型 例子： List<MeasurementSchema> schemaList = new ArrayList<>();  schemaList.add(new MeasurementSchema("breath", TSDataType.INT64));
     *  @param  maxRowNumber：
     * @return
     */
    public void insertTablet(String deviceId,  Long time,List<MeasurementSchema> schemaList, List<Object> valueList,int maxRowNumber) throws StatementExecutionException, IoTDBConnectionException {

        Tablet tablet = new Tablet(deviceId, schemaList, maxRowNumber);
        // 向iotdb里面添加数据
        int rowIndex = tablet.rowSize++;
        tablet.addTimestamp(rowIndex, time);
        for (int i = 0; i < valueList.size(); i++) {
            tablet.addValue(schemaList.get(i).getMeasurementId(), rowIndex, valueList.get(i));
        }
        if (tablet.rowSize == tablet.getMaxRowNumber()) {
            session.insertTablet(tablet, true);
            tablet.reset();
        }
        if (tablet.rowSize != 0) {
            session.insertTablet(tablet);
            tablet.reset();
        }
    }

    /**
     * description: 根据SQL查询
     * author: zhouhong
     */
    public SessionDataSet query(String sql) throws StatementExecutionException, IoTDBConnectionException {
        return session.executeQueryStatement(sql);
    }

    /**
     * description: 删除分组 如 root.a1eaKSRpRty
     * author: zhouhong
     * @param  groupName：分组名称
     * @return
     */
    public void deleteStorageGroup(String groupName) throws StatementExecutionException, IoTDBConnectionException {
        session.deleteStorageGroup(groupName);
    }

    /**
     * description: 根据Timeseries删除  如：root.a1eaKSRpRty.CA3013A303A25467.breath  （个人理解：为具体的物理量）
     * author: zhouhong
     */
    public void deleteTimeseries(String timeseries) throws StatementExecutionException, IoTDBConnectionException {
        session.deleteTimeseries(timeseries);
    }
    /**
     * description: 根据Timeseries批量删除
     * author: zhouhong
     */
    public void deleteTimeserieList(List<String> timeseriesList) throws StatementExecutionException, IoTDBConnectionException {
        session.deleteTimeseries(timeseriesList);
    }

    /**
     * description: 根据分组批量删除
     * author: zhouhong
     */
    public void deleteStorageGroupList(List<String> storageGroupList) throws StatementExecutionException, IoTDBConnectionException {
        session.deleteStorageGroups(storageGroupList);
    }

    /**
     * description: 根据路径和结束时间删除 结束时间之前的所有数据
     * author: zhouhong
     */
    public void deleteDataByPathAndEndTime(String path, Long endTime) throws StatementExecutionException, IoTDBConnectionException {
        session.deleteData(path, endTime);
    }
    /**
     * description: 根据路径集合和结束时间批量删除 结束时间之前的所有数据
     * author: zhouhong
     */
    public void deleteDataByPathListAndEndTime(List<String> pathList, Long endTime) throws StatementExecutionException, IoTDBConnectionException {
        session.deleteData(pathList, endTime);
    }
    /**
     * description: 根据路径集合和时间段批量删除
     * author: zhouhong
     */
    public void deleteDataByPathListAndTime(List<String> pathList, Long startTime,Long endTime) throws StatementExecutionException, IoTDBConnectionException {
        session.deleteData(pathList, startTime, endTime);
    }

}

3.入参

package com.zhouhong.iotdbdemo.model.param;

import lombok.Data;
/**
 * description: 入参
 * date: 2022/8/15 21:53
 * author: zhouhong
 */
@Data
public class IotDbParam {
    /***
     * 产品PK
     */
    private  String  pk;
    /***
     * 设备号
     */
    private  String  sn;
    /***
     * 时间
     */
    private Long time;
    /***
     * 实时呼吸
     */
    private String breath;
    /***
     * 实时心率
     */
    private String heart;
    /***
     * 查询开始时间
     */
    private String startTime;
    /***
     * 查询结束时间
     */
    private String endTime;

}

4.返回参数

package com.zhouhong.iotdbdemo.model.result;

import lombok.Data;

/**
 * description: 返回结果
 * date: 2022/8/15 21:56
 * author: zhouhong
 */
@Data
public class IotDbResult {
    /***
     * 时间
     */
    private String time;
    /***
     * 产品PK
     */
    private  String  pk;
    /***
     * 设备号
     */
    private  String  sn;
    /***
     * 实时呼吸
     */
    private String breath;
    /***
     * 实时心率
     */
    private String heart;

}

5.使用

package com.zhouhong.iotdbdemo.server.impl;

import com.zhouhong.iotdbdemo.config.IotDBSessionConfig;
import com.zhouhong.iotdbdemo.model.param.IotDbParam;
import com.zhouhong.iotdbdemo.model.result.IotDbResult;
import com.zhouhong.iotdbdemo.server.IotDbServer;
import lombok.extern.log4j.Log4j2;
import org.apache.iotdb.rpc.IoTDBConnectionException;
import org.apache.iotdb.rpc.StatementExecutionException;
import org.apache.iotdb.session.SessionDataSet;
import org.apache.iotdb.tsfile.read.common.Field;
import org.apache.iotdb.tsfile.read.common.RowRecord;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.rmi.ServerException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * description: iot服务实现类
 * date: 2022/8/15 9:43
 * author: zhouhong
 */

@Log4j2
@Service
public class IotDbServerImpl implements IotDbServer {

    @Resource
    private IotDBSessionConfig iotDBSessionConfig;

    @Override
    public void insertData(IotDbParam iotDbParam) throws StatementExecutionException, ServerException, IoTDBConnectionException {
        // iotDbParam: 模拟设备上报消息
        // bizkey: 业务唯一key  PK :产品唯一编码   SN:设备唯一编码
        String deviceId = "root.bizkey."+ iotDbParam.getPk() + "." + iotDbParam.getSn();
        // 将设备上报的数据存入数据库(时序数据库)
        List<String> measurementsList = new ArrayList<>();
        measurementsList.add("heart");
        measurementsList.add("breath");
        List<String> valuesList = new ArrayList<>();
        valuesList.add(String.valueOf(iotDbParam.getHeart()));
        valuesList.add(String.valueOf(iotDbParam.getBreath()));
        iotDBSessionConfig.insertRecord(deviceId, iotDbParam.getTime(), measurementsList, valuesList);
    }

    @Override
    public List<IotDbResult> queryDataFromIotDb(IotDbParam iotDbParam) throws Exception {
        List<IotDbResult> iotDbResultList = new ArrayList<>();

        if (null != iotDbParam.getPk() && null != iotDbParam.getSn()) {
            String sql = "select * from root.bizkey."+ iotDbParam.getPk() +"." + iotDbParam.getSn() + " where time >= "
                    + iotDbParam.getStartTime() + " and time < " + iotDbParam.getEndTime();
            SessionDataSet sessionDataSet = iotDBSessionConfig.query(sql);
            List<String> columnNames = sessionDataSet.getColumnNames();
            List<String> titleList = new ArrayList<>();
            // 排除Time字段 -- 方便后面后面拼装数据
            for (int i = 1; i < columnNames.size(); i++) {
                String[] temp = columnNames.get(i).split("\\.");
                titleList.add(temp[temp.length - 1]);
            }
            // 封装处理数据
            packagingData(iotDbParam, iotDbResultList, sessionDataSet, titleList);
        } else {
            log.info("PK或者SN不能为空！！");
        }
        return iotDbResultList;
    }
    /**
     * 封装处理数据
     * @param iotDbParam
     * @param iotDbResultList
     * @param sessionDataSet
     * @param titleList
     * @throws StatementExecutionException
     * @throws IoTDBConnectionException
     */
    private void packagingData(IotDbParam iotDbParam, List<IotDbResult> iotDbResultList, SessionDataSet sessionDataSet, List<String> titleList)
            throws StatementExecutionException, IoTDBConnectionException {
        int fetchSize = sessionDataSet.getFetchSize();
        if (fetchSize > 0) {
            while (sessionDataSet.hasNext()) {
                IotDbResult iotDbResult = new IotDbResult();
                RowRecord next = sessionDataSet.next();
                List<Field> fields = next.getFields();
                String timeString = new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(next.getTimestamp());
                iotDbResult.setTime(timeString);
                Map<String, String> map = new HashMap<>();

                for (int i = 0; i < fields.size(); i++) {
                    Field field = fields.get(i);
                    // 这里的需要按照类型获取
                    map.put(titleList.get(i), field.getObjectValue(field.getDataType()).toString());
                }
                iotDbResult.setTime(timeString);
                iotDbResult.setPk(iotDbParam.getPk());
                iotDbResult.setSn(iotDbParam.getSn());
                iotDbResult.setHeart(map.get("heart"));
                iotDbResult.setBreath(map.get("breath"));
                iotDbResultList.add(iotDbResult);
            }
        }
    }
}

6.控制层

package com.zhouhong.iotdbdemo.controller;

import com.zhouhong.iotdbdemo.config.IotDBSessionConfig;
import com.zhouhong.iotdbdemo.model.param.IotDbParam;
import com.zhouhong.iotdbdemo.response.ResponseData;
import com.zhouhong.iotdbdemo.server.IotDbServer;
import lombok.extern.log4j.Log4j2;
import org.apache.iotdb.rpc.IoTDBConnectionException;
import org.apache.iotdb.rpc.StatementExecutionException;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import java.rmi.ServerException;

/**
 * description: iotdb 控制层
 * date: 2022/8/15 21:50
 * author: zhouhong
 */
@Log4j2
@RestController
public class IotDbController {

    @Resource
    private IotDbServer iotDbServer;
    @Resource
    private IotDBSessionConfig iotDBSessionConfig;

    /**
     * 插入数据
     * @param iotDbParam
     */
    @PostMapping("/api/device/insert")
    public ResponseData insert(@RequestBody IotDbParam iotDbParam) throws StatementExecutionException, ServerException, IoTDBConnectionException {
        iotDbServer.insertData(iotDbParam);
        return ResponseData.success();
    }

    /**
     * 插入数据
     * @param iotDbParam
     */
    @PostMapping("/api/device/queryData")
    public ResponseData queryDataFromIotDb(@RequestBody IotDbParam iotDbParam) throws Exception {
        return ResponseData.success(iotDbServer.queryDataFromIotDb(iotDbParam));
    }

    /**
     * 删除分组
     * @return
     */
    @PostMapping("/api/device/deleteGroup")
    public ResponseData deleteGroup() throws StatementExecutionException, IoTDBConnectionException {
        iotDBSessionConfig.deleteStorageGroup("root.a1eaKSRpRty");
        iotDBSessionConfig.deleteStorageGroup("root.smartretirement");
        return ResponseData.success();
    }

}

四.PostMan测试

1.添加一条记录

接口：localhost:8080/api/device/insert

入参：

{
    "time":1660573444672,
    "pk":"a1TTQK9TbKT",
    "sn":"SN202208120945QGJLD",
    "breath":"17",
    "heart":"68"
}

 

 

 查看IotDB数据

 

 

 2.根据SQL查询时间区间记录(其他查询以此类推)

接口：localhost:8080/api/device/queryData

入参：

{
    "pk":"a1TTQK9TbKT",
    "sn":"SN202208120945QGJLD",
    "startTime":"2022-08-14 00:00:00",
    "endTime":"2022-08-16 00:00:00"
}

结果：

{
    "success": true,
    "code": 200,
    "message": "请求成功",
    "localizedMsg": "请求成功",
    "data": [
        {
            "time": "2022-08-15 22:24:04",
            "pk": "a1TTQK9TbKT",
            "sn": "SN202208120945QGJLD",
            "breath": "19.0",
            "heart": "75.0"
        },
        {
            "time": "2022-08-15 22:24:04",
            "pk": "a1TTQK9TbKT",
            "sn": "SN202208120945QGJLD",
            "breath": "20.0",
            "heart": "78.0"
        },
        {
            "time": "2022-08-15 22:24:04",
            "pk": "a1TTQK9TbKT",
            "sn": "SN202208120945QGJLD",
            "breath": "17.0",
            "heart": "68.0"
        }
    ]
}

IotDB还支持分页、聚合等等其他操作，详细信息可以参考 https://iotdb.apache.org/zh/UserGuide/Master/Query-Data/Overview.html