/// <summary>
/// Starts the monitoring.
/// </summary>
/// <param name="callback">The callback to use when reporting changes.</param>
public void StartMonitoring(TagsChangedEventHandler callback)
{
lock (m_tags)
{
OnTagsChanged = callback;
}
}
/// <summary>
/// Simulates a block by updating the state of the tags belonging to the condition.
/// </summary>
/// <param name="counter">The number of simulation cycles that have elapsed.</param>
/// <param name="index">The index of the block within the system.</param>
/// <param name="generator">An object which generates random data.</param>
public void DoSimulation(long counter, int index, Opc.Ua.Test.DataGenerator generator)
{
try
{
TagsChangedEventHandler onTagsChanged = null;
List <UnderlyingSystemTag> snapshots = new List <UnderlyingSystemTag>();
// update the tags.
lock (m_tags)
{
onTagsChanged = OnTagsChanged;
// do nothing if not monitored.
if (onTagsChanged == null)
{
return;
}
for (int ii = 0; ii < m_tags.Count; ii++)
{
UnderlyingSystemTag tag = m_tags[ii];
UpdateTagValue(tag, generator);
DataValue value = new DataValue();
value.Value = tag.Value;
value.StatusCode = StatusCodes.Good;
value.SourceTimestamp = tag.Timestamp;
if (counter % (8 + (index % 4)) == 0)
{
UpdateTagMetadata(tag, generator);
}
snapshots.Add(tag.CreateSnapshot());
}
}
// report any tag changes after releasing the lock.
if (onTagsChanged != null)
{
onTagsChanged(snapshots);
}
}
catch (Exception e)
{
Utils.Trace(e, "Unexpected error running simulation for block {0}", m_name);
}
}
/// <summary>
/// Starts the monitoring.
/// </summary>
/// <param name="callback">The callback to use when reporting changes.</param>
public void StartMonitoring(TagsChangedEventHandler callback)
{
lock (m_tags)
{
OnTagsChanged = callback;
}
}
/// <summary>
/// Writes the tag value.
/// </summary>
/// <param name="tagName">Name of the tag.</param>
/// <param name="value">The value.</param>
/// <returns>The status code for the operation.</returns>
public uint WriteTagValue(string tagName, object value)
{
UnderlyingSystemTag tag = null;
TagsChangedEventHandler onTagsChanged = null;
lock (_tags) {
onTagsChanged = OnTagsChanged;
// find the tag.
tag = FindTag(tagName);
if (tag == null)
{
return(StatusCodes.BadNodeIdUnknown);
}
// cast value to correct type.
try {
switch (tag.DataType)
{
case UnderlyingSystemDataType.Integer1: {
tag.Value = (sbyte)value;
break;
}
case UnderlyingSystemDataType.Integer2: {
tag.Value = (short)value;
break;
}
case UnderlyingSystemDataType.Integer4: {
tag.Value = (int)value;
break;
}
case UnderlyingSystemDataType.Real4: {
tag.Value = (float)value;
break;
}
case UnderlyingSystemDataType.String: {
tag.Value = (string)value;
break;
}
}
}
catch {
return(StatusCodes.BadTypeMismatch);
}
// updated the timestamp.
tag.Timestamp = DateTime.UtcNow;
}
// raise notification.
if (tag != null && onTagsChanged != null)
{
onTagsChanged(new UnderlyingSystemTag[] { tag });
}
return(StatusCodes.Good);
}
