Springboot使用influxDB时序数据库的实现

    <dependency>
        <groupId>org.influxdb</groupId>
        <artifactId>influxdb-java</artifactId>
        <version>2.15</version>
    </dependency>

spring:
  influx:
    url: *
    password: admin
    user: 123
    database: log_management

@Configuration
public class InfluxDbConfig {

    @Value("${spring.influx.url:''}")
    private String influxDBUrl;

    @Value("${spring.influx.user:''}")
    private String userName;

    @Value("${spring.influx.password:''}")
    private String password;

    @Value("${spring.influx.database:''}")
    private String database;

    @Bean
    public InfluxDbUtils influxDbUtils() {
        return new InfluxDbUtils(userName, password, influxDBUrl, database, "");
    }
}

@Data
 public class InfluxDbUtils {
    private String userName;
    private String password;
    private String url;
    public String database;
    private String retentionPolicy;
    // InfluxDB实例
    private InfluxDB influxDB;

    // 数据保存策略
    public static String policyNamePix = "logRetentionPolicy_";

    public InfluxDbUtils(String userName, String password, String url, String database,
                         String retentionPolicy) {
        this.userName = userName;
        this.password = password;
        this.url = url;
        this.database = database;
        this.retentionPolicy = retentionPolicy == null || "".equals(retentionPolicy) ? "autogen" : retentionPolicy;
        this.influxDB = influxDbBuild();
    }

    /**
     * 连接数据库 ，若不存在则创建
     *
     * @return influxDb实例
     */
    private InfluxDB influxDbBuild() {
        if (influxDB == null) {
            influxDB = InfluxDBFactory.connect(url, userName, password);
        }
        try {
            createDB(database);
            influxDB.setDatabase(database);
        } catch (Exception e) {
            log.error("create influx db failed, error: {}", e.getMessage());
        } finally {
            influxDB.setRetentionPolicy(retentionPolicy);
        }
        influxDB.setLogLevel(InfluxDB.LogLevel.BASIC);
        return influxDB;
    }
 }

@Builder
@Data
@Measurement(name = "logInfo")
public class LogInfo {

    // Column中的name为measurement中的列名
    // 此外,需要注意InfluxDB中时间戳均是以UTC时保存,在保存以及提取过程中需要注意时区转换
    @Column(name = "time")
    private String time;
    // 注解中添加tag = true,表示当前字段内容为tag内容
    @Column(name = "module", tag = true)
    private String module;
    @Column(name = "level", tag = true)
    private String level;
    @Column(name = "device_id", tag = true)
    private String deviceId;
    @Column(name = "msg")
    private String msg;
}

    LogInfo logInfo = LogInfo.builder()
        .level(jsonObject.getString("level"))
        .module(module)
        .deviceId(deviceId)
        .msg(jsonObject.getString("msg"))
        .build();
    Point point = Point.measurementByPOJO(logInfo.getClass())
        .addFieldsFromPOJO(logInfo)
        .time(jsonObject.getLong("time"), TimeUnit.MILLISECONDS)
        .build();
    // 出于业务考量,设备可以设置不同的保存策略(策略名为固定前缀+设备ID)
    influxDB.write(influxDBUtils.database, InfluxDbUtils.policyNamePix + deviceId, point);

    // InfluxDB支持分页查询,因此可以设置分页查询条件
    String pageQuery = " LIMIT " + request.getPageSize() + " OFFSET " + ((request.getPageNum() - 1) * request.getPageSize());
    // 此处查询所有内容,如果
    String queryCmd = "SELECT * FROM "
        // 查询指定设备下的日志信息
        // 要指定从 RetentionPolicyName(保存策略前缀+设备ID).measurement(logInfo) 中查询指定数据)
        + InfluxDbUtils.policyNamePix + request.getDeviceId() + "." + "logInfo"
        // 添加查询条件(注意查询条件选择tag值,选择field数值会严重拖慢查询速度)
        + queryCondition
        // 查询结果需要按照时间排序
        + " ORDER BY time DESC"
        // 添加分页查询条件
        + pageQuery;