日志只返回最新的元素

问题描述

尝试使用 Datalogger 和 Logbook 时，当我希望获得保存的读数数组时，查询设备 Logbook 时只会获得最新读数。

我正在尝试构建一个 1-Wire 阅读应用程序来测试该平台，我已经定义了一个与 /Meas/Temp 非常相似的订阅 API：

paths:
  /OneWireTemp/Subscription:
    post:
      description: |
        Subscribe to periodic temperature readings.
      responses:
        200:
          description: Operation completed successfully
        x-std-errors:
          description: See common error codes http://developer.suunto.com/api/std-errors#subscribe
        x-notification:
          schema:
            $ref: "#/deFinitions/TempMeasurement"
    delete:
      description: |
        Unsubscribe to periodic temperature readings.
      responses:
        200:
          description: Operation completed successfully
        x-std-errors:
          description: See common error codes http://developer.suunto.com/api/std-errors#unsubscribe

deFinitions:
  TempMeasurement:
    required:
      - Timestamp
      - Measurement
    properties:
      Timestamp:
        description: Relative time of temperature reading
        type: integer
        format: uint32
        x-unit: millisecond
      Measurement:
        description: Temperature reading
        type: integer
        format: int16
        x-unit: celsius

我开始在设备端登录：

bool OneWireTempService::startDataLogger() {
  WB_RES::DataEntry entry;
  // Must match the subscription API path (without the /Subscription)
  entry.path = "/OneWireTemp";

  WB_RES::DataLoggerConfig dataLoggerConfig;
  WB_RES::DataEntry entries[] = {entry};
  dataLoggerConfig.dataEntries.dataEntry =
      wb::MakeArray<WB_RES::DataEntry>(entries,1);

  wb::Result configureResult =
      asyncput(WB_RES::LOCAL::MEM_DATALOGGER_CONfig(),AsyncRequestOptions::Empty,dataLoggerConfig);

  if (!wb::RETURN_OK(configureResult)) {
    DebugLogger::error("Datalogger configuring Failed: %u",configureResult);
    return false;
  }

  wb::Result stateResult = asyncput(
      WB_RES::LOCAL::MEM_DATALOGGER_STATE(),WB_RES::DataLoggerStateValues::Type::DATALOGGER_LOGGING);

  if (!wb::RETURN_OK(stateResult)) {
    DebugLogger::error("Datalogger enabling Failed: %u",stateResult);
    return false;
  }

  return true;
}

我像这样更新订阅：

WB_RES::TempMeasurement tempMeasurement;
tempMeasurement.measurement = mTempReading;
tempMeasurement.timestamp = currentTime;

updateResource(WB_RES::LOCAL::ONEWIRETEMP(),ResponSEOptions::Empty,tempMeasurement);

现在在 Android 端，我使用 mds 库连接到设备，mds/Logbook/{Serial}/Entries 一段时间后返回一个日志：{"elements": [{"Id": 2,"ModificationTimestamp": 1613406975,"Size": null}]}。

现在查询 mds/Logbook/{Serial}/ById/2/Data 时，我只得到最新的测量值：{"OneWireTemp":{"Measurement":2536,"Timestamp":2794239193}}。读数甚至不在数组中。

解决方法

这是通过将结果包装在一个数组中来解决的，然后数据记录器似乎明白日志中可以有多个条目：

paths:
  /OneWireTemp/Subscription:
    post:
      description: |
        Subscribe to periodic temperature readings.
      responses:
        200:
          description: Operation completed successfully
        x-std-errors:
          description: See common error codes http://developer.suunto.com/api/std-errors#subscribe
        x-notification:
          schema:
            $ref: "#/definitions/OneWireTempMeasurements"
    delete:
      description: |
        Unsubscribe to periodic temperature readings.
      responses:
        200:
          description: Operation completed successfully
        x-std-errors:
          description: See common error codes http://developer.suunto.com/api/std-errors#unsubscribe

definitions:
  OneWireTempMeasurements:
    required:
      - Measurements
    properties:
      Measurements:
        description: Wrapper array
        type: array
        items:
          $ref: '#/definitions/OneWireTempMeasurement'
  OneWireTempMeasurement:
    required:
      - Timestamp
      - Measurement
    properties:
      Timestamp:
        description: Relative time of temperature reading
        type: integer
        format: uint32
        x-unit: millisecond
      Measurement:
        description: Temperature reading in celsius
        type: integer
        format: int16
        x-unit: celsius