/// <summary>
/// Find the timestamp of the most recent record for each device.
/// </summary>
/// <returns>The high water mark.</returns>
private DateTime getWeatherHighWaterMark()
{
Utils.Log("Getting high water mark for weather...");
var mostRecent = ElasticUtils.getHighWaterMark <WeatherReading>(EsClient, settings.weatherUnderground.IndexName, null);
if (mostRecent != null)
{
return(mostRecent.timestamp.AddSeconds(1));
}
return(new DateTime(2014, 1, 1, 0, 0, 0, DateTimeKind.Utc));
}
/// <summary>
/// Find the timestamp of the most recent record for each device.
/// </summary>
/// <returns>The high water mark.</returns>
/// <param name="uuid">Device UUID</param>
private DateTime getDeviceHighWaterMark(string uuid)
{
var query = new TermQuery {
Field = "device.uuid.keyword", Value = uuid
};
Utils.Log("Getting high water mark for {0}...", uuid);
var mostRecent = ElasticUtils.getHighWaterMark <SensorReading>(EsClient, settings.indexname, query);
if (mostRecent != null)
{
if (mostRecent.device.uuid != uuid)
{
throw new ArgumentException("High watermark returned for incorrect UUID!");
}
return(mostRecent.timestamp.AddSeconds(1));
}
return(new DateTime(2017, 1, 1, 0, 0, 0, DateTimeKind.Utc));
}
