/// <summary>
/// Loads the data.
/// </summary>
public void ReloadFromSource(ISystemContext context)
{
LoadConfiguration(context);
if (ArchiveItem.LastLoadTime == DateTime.MinValue || (ArchiveItem.Persistent && ArchiveItem.LastLoadTime.AddSeconds(10) < DateTime.UtcNow))
{
var reader = new DataFileReader();
reader.LoadHistoryData(context, ArchiveItem);
// set the start of the archive.
if (ArchiveItem.DataSet.Tables[0].DefaultView.Count > 0)
{
_configuration.StartOfArchive.Value = (DateTime)ArchiveItem.DataSet.Tables[0].DefaultView[0].Row[0];
_configuration.StartOfOnlineArchive.Value = _configuration.StartOfArchive.Value;
}
if (ArchiveItem.Archiving)
{
// save the pattern used to produce new data.
_pattern = new List <DataValue>();
foreach (DataRowView row in ArchiveItem.DataSet.Tables[0].DefaultView)
{
var value = (DataValue)row.Row[2];
_pattern.Add(value);
_nextSampleTime = value.SourceTimestamp.AddMilliseconds(ArchiveItem.SamplingInterval);
}
// fill in data until the present time.
_patternIndex = 0;
NewSamples(context);
}
}
}
/// <summary>
/// Loads the configuration.
/// </summary>
public void LoadConfiguration(ISystemContext context)
{
var reader = new DataFileReader();
if (reader.LoadConfiguration(context, ArchiveItem))
{
DataType = (uint)ArchiveItem.DataType;
ValueRank = ArchiveItem.ValueRank;
Historizing = ArchiveItem.Archiving;
_configuration.MinTimeInterval.Value = ArchiveItem.SamplingInterval;
_configuration.MaxTimeInterval.Value = ArchiveItem.SamplingInterval;
_configuration.Stepped.Value = ArchiveItem.Stepped;
var configuration = ArchiveItem.AggregateConfiguration;
_configuration.AggregateConfiguration.PercentDataGood.Value = configuration.PercentDataGood;
_configuration.AggregateConfiguration.PercentDataBad.Value = configuration.PercentDataBad;
_configuration.AggregateConfiguration.UseSlopedExtrapolation.Value = configuration.UseSlopedExtrapolation;
_configuration.AggregateConfiguration.TreatUncertainAsBad.Value = configuration.TreatUncertainAsBad;
}
}