You can call the UpdateTimeseriesMeta operation to update the metadata of multiple time series at the same time.

Prerequisites

  • Time series data is written to the time series table. For more information, see Write time series data.
  • The TimeseriesClient is initialized. For more information, see Initialization.

Parameters

The timeseriesMeta parameter specifies the metadata of a time series. Each timeseriesMeta parameter consists of the timeseriesKey and attributes parameters. The following table describes the parameters.

Parameter Description
timeseriesKey The identifier of the time series.
attributes The properties of the time series. The value is a key-value pair of the string type.

Example

Update the properties of the time series that meet the specified conditions in a time series table named test_timeseries_table. 

private static void updateTimeseriesMeta(TimeseriesClient client) {
    List<TimeseriesMeta> timeseriesMetaList = new ArrayList<TimeseriesMeta>();
    for (int i = 0; i < 10; i++) {
        Map<String, String> tags = new HashMap<String, String>();
        tags.put("region", "hangzhou");
        tags.put("os", "Ubuntu16.04");
        // Construct TimeseriesKey. 
        TimeseriesKey timeseriesKey = new TimeseriesKey("cpu", "host_" + i, tags);
        TimeseriesMeta meta = new TimeseriesMeta(timeseriesKey);
        // Specify the properties of the time series. 
        Map<String, String> attrs = new HashMap<String, String>();
        attrs.put("status", "online");
        meta.setAttributes(attrs);
        timeseriesMetaList.add(meta);
    }
    String tableName = "test_timeseries_table";
    UpdateTimeseriesMetaRequest updateTimeseriesMetaRequest = new UpdateTimeseriesMetaRequest(tableName);
    updateTimeseriesMetaRequest.setMetas(timeseriesMetaList);
    UpdateTimeseriesMetaResponse updateTimeseriesMetaResponse = client.updateTimeseriesMeta(updateTimeseriesMetaRequest);
    // Check whether the properties of the time series are updated. 
    if (!updateTimeseriesMetaResponse.isAllSuccess()) {
        for (UpdateTimeseriesMetaResponse.FailedRowResult failedRowResult : updateTimeseriesMetaResponse.getFailedRows()) {
            System.out.println(failedRowResult.getIndex());
            System.out.println(failedRowResult.getError());
        }
    }
}