/// <summary>
/// Creates a new <see cref="TagValueFilterSettings"/> object.
/// </summary>
/// <param name="isEnabled">A flag indicating if the filter is enabled or not.</param>
/// <param name="limitType">The filter limit type.</param>
/// <param name="limit">The filter limit threshold.</param>
/// <param name="windowSize">The filter window size.</param>
public TagValueFilterSettings(bool isEnabled, TagValueFilterDeviationType limitType, double limit, TimeSpan windowSize)
{
IsEnabled = isEnabled;
LimitType = limitType;
Limit = limit;
WindowSize = windowSize;
}
/// <summary>
/// Loads a tag definition from the Redis database.
/// </summary>
/// <param name="historian">The Redis historian to load the tag from.</param>
/// <param name="tagId">The ID of the tag to load.</param>
/// <param name="cancellationToken">The cancellation token for the request.</param>
/// <returns>
/// A task that will return the loaded tag definition.
/// </returns>
internal static async Task <RedisTagDefinition> Load(RedisHistorian historian, string tagId, CancellationToken cancellationToken)
{
var values = await historian.Connection.GetDatabase().HashGetAllAsync(historian.GetKeyForTagDefinition(tagId)).ConfigureAwait(false);
cancellationToken.ThrowIfCancellationRequested();
string name = null;
string description = null;
string units = null;
TagDataType dataType = default(TagDataType);
string stateSet = null;
bool exceptionFilterEnabled = false;
TagValueFilterDeviationType exceptionFilterLimitType = default(TagValueFilterDeviationType);
double exceptionFilterLimit = 0;
TimeSpan exceptionFilterWindowSize = default(TimeSpan);
bool compressionFilterEnabled = false;
TagValueFilterDeviationType compressionFilterLimitType = default(TagValueFilterDeviationType);
double compressionFilterLimit = 0;
TimeSpan compressionFilterWindowSize = default(TimeSpan);
DateTime createdAt = DateTime.MinValue;
string creator = null;
DateTime modifiedAt = DateTime.MinValue;
string modifiedBy = null;
foreach (var item in values)
{
switch (item.Name.ToString())
{
case "NAME":
name = item.Value;
break;
case "DESC":
description = item.Value;
break;
case "UNITS":
units = item.Value;
break;
case "TYPE":
dataType = (TagDataType)((int)item.Value);
break;
case "SSET":
stateSet = item.Value;
break;
case "EXC_ENABLED":
exceptionFilterEnabled = Convert.ToBoolean((int)item.Value);
break;
case "EXC_LIMIT_TYPE":
exceptionFilterLimitType = (TagValueFilterDeviationType)((int)item.Value);
break;
case "EXC_LIMIT":
exceptionFilterLimit = (double)item.Value;
break;
case "EXC_WINDOW":
exceptionFilterWindowSize = TimeSpan.Parse(item.Value);
break;
case "COM_ENABLED":
compressionFilterEnabled = Convert.ToBoolean((int)item.Value);
break;
case "COM_LIMIT_TYPE":
compressionFilterLimitType = (TagValueFilterDeviationType)((int)item.Value);
break;
case "COM_LIMIT":
compressionFilterLimit = (double)item.Value;
break;
case "COM_WINDOW":
compressionFilterWindowSize = TimeSpan.Parse(item.Value);
break;
case "MD_CREATEDAT":
createdAt = new DateTime((long)item.Value, DateTimeKind.Utc);
break;
case "MD_CREATEDBY":
creator = item.Value;
break;
case "MD_MODIFIEDAT":
modifiedAt = new DateTime((long)item.Value, DateTimeKind.Utc);
break;
case "MD_MODIFIEDBY":
modifiedBy = item.Value;
break;
}
}
if (String.IsNullOrWhiteSpace(name))
{
name = tagId;
}
var settings = new TagSettings()
{
Name = name,
Description = description,
Units = units,
DataType = dataType,
StateSet = stateSet,
ExceptionFilterSettings = new TagValueFilterSettingsUpdate()
{
IsEnabled = exceptionFilterEnabled,
LimitType = exceptionFilterLimitType,
Limit = exceptionFilterLimit,
WindowSize = exceptionFilterWindowSize
},
CompressionFilterSettings = new TagValueFilterSettingsUpdate()
{
IsEnabled = compressionFilterEnabled,
LimitType = compressionFilterLimitType,
Limit = compressionFilterLimit,
WindowSize = compressionFilterWindowSize
}
};
var metadata = new TagMetadata(createdAt, creator, modifiedAt, modifiedBy);
var snapshotTask = LoadSnapshotValue(historian, tagId, cancellationToken);
var lastArchivedTask = LoadLastArchivedValue(historian, tagId, cancellationToken);
var archiveCandidateTask = LoadArchiveCandidateValue(historian, tagId, cancellationToken);
await Task.WhenAll(snapshotTask, lastArchivedTask, archiveCandidateTask).ConfigureAwait(false);
cancellationToken.ThrowIfCancellationRequested();
var initialValues = new InitialTagValues(snapshotTask.Result, lastArchivedTask.Result, archiveCandidateTask.Result.Value, archiveCandidateTask.Result.CompressionAngleMinimum, archiveCandidateTask.Result.CompressionAngleMaximum);
var result = new RedisTagDefinition(historian,
tagId,
settings,
metadata,
initialValues,
null);
return(result);
}
