public OpcStatusCollection DeleteHistory(
OpcContext context,
OpcHistoryModificationInfo modificationInfo,
OpcValueCollection values)
{
var results = OpcStatusCollection.Create(OpcStatusCode.Good, values.Count);
lock (this.syncRoot) {
for (int index = 0; index < values.Count; index++)
{
var timestamp = OpcHistoryValue.Create(values[index]).Timestamp;
var result = results[index];
if (this.History.Contains(timestamp))
{
var value = this.History[timestamp];
this.History.RemoveAt(timestamp);
var modifiedValue = value.CreateModified(modificationInfo);
this.ModifiedHistory.Add(modifiedValue);
}
else
{
result.Update(OpcStatusCode.BadNoEntryExists);
}
}
}
return(results);
}
public OpcStatusCollection UpdateHistory(
OpcContext context,
OpcHistoryModificationInfo modificationInfo,
OpcValueCollection values)
{
var results = OpcStatusCollection.Create(OpcStatusCode.Good, values.Count);
lock (this.syncRoot) {
var expectedDataTypeId = this.Node.DataTypeId;
for (int index = 0; index < values.Count; index++)
{
var result = results[index];
var value = OpcHistoryValue.Create(values[index]);
if (value.DataTypeId == expectedDataTypeId)
{
if (this.History.Contains(value.Timestamp))
{
var oldValue = this.History[value.Timestamp];
this.History.Replace(value);
var modifiedValue = oldValue.CreateModified(modificationInfo);
this.ModifiedHistory.Add(modifiedValue);
result.Update(OpcStatusCode.GoodEntryReplaced);
}
else
{
this.History.Add(value);
var modifiedValue = value.CreateModified(modificationInfo);
this.ModifiedHistory.Add(modifiedValue);
result.Update(OpcStatusCode.GoodEntryInserted);
}
}
else
{
result.Update(OpcStatusCode.BadTypeMismatch);
}
}
}
return(results);
}
private void HandleNodeBeforeApplyChanges(object sender, OpcNodeChangesEventArgs e)
{
var timestamp = this.Node.Timestamp;
if (timestamp != null && e.IsChangeOf(OpcNodeChanges.Value))
{
var value = new OpcHistoryValue(this.Node.Value, timestamp.Value);
if (this.History.Contains(value.Timestamp))
{
this.History.Replace(value);
}
else
{
this.History.Add(value);
}
}
}
/// <summary>
/// Creates the different entries contained in the raw history and modified raw history
/// of the node historian used.
/// </summary>
/// <param name="historian">The <see cref="OpcNodeHistorian"/> its history
/// entries being created.</param>
private static void CreateHistoryEntries(OpcNodeHistorian historian)
{
for (int second = 0; second < 3600; second++)
{
var value = new OpcHistoryValue(
1000 + second, DateTime.UtcNow.Date.AddHours(6).AddSeconds(second));
if ((second % 30) == 0)
{
historian.ModifiedHistory.Add(value.CreateModified(
OpcHistoryModificationType.Delete, "Anonymous", value.Timestamp));
}
else
{
historian.History.Add(value);
}
}
}
private static void CreateHistoryEntries <T>(
SampleHistorian historian,
Func <int, T> nextValue)
{
for (int second = 0; second < 60; second++)
{
var timestamp = DateTime.UtcNow.Date.AddHours(6).AddSeconds(second);
var modifier = Math.Max(10, second) / 10;
var value = new OpcHistoryValue(nextValue(modifier), timestamp);
if ((second % 30) == 0)
{
historian.ModifiedHistory.Add(value.CreateModified(
OpcHistoryModificationType.Delete, "Anonymous", value.Timestamp));
}
else
{
historian.History.Add(value);
}
}
}
