/// <summary>
/// Values of existing CONDITION events are updated the forwarded to TheGlobal for further processing
/// per subscription per server instance
/// </summary>
/// <param name="EventNotification"></param>
/// <param name="areas"></param>
/// <param name="newCond"></param>
private void ProcessCondition(EventNotification EventNotification, string[] areas, OPCCondition newCond)
{
try
{
newCond.ClearChangeMask();
newCond.SetMessage(EventNotification.Message);
newCond.SetSeverity(EventNotification.Severity);
newCond.SetSubconditionName(EventNotification.SubConditionName);
newCond.SetActive((EventNotification.NewState & OpcRcw.Ae.Constants.CONDITION_ACTIVE) != 0);
// The UA server generates unique identifiers in the form of guids. how to map these to COM-style cookies?
// For now, just increment a static DWORD counter from the OPCCondition constructor and assign
//newCond.Cookie = EventNotification.Cookie;
newCond.SetTime(EventNotification.ActiveTime);
newCond.EventId = EventNotification.EventId;
newCond.EventCategory = EventNotification.EventCategory;
newCond.SetQuality((short)EventNotification.Quality);
newCond.ActorID = EventNotification.EventType == OpcRcw.Ae.Constants.TRACKING_EVENT ? EventNotification.ActorID : "";
newCond.SetEnable((EventNotification.NewState & OpcRcw.Ae.Constants.CONDITION_ENABLED) != 0);
newCond.SetIsAcked((EventNotification.NewState & OpcRcw.Ae.Constants.CONDITION_ACKED) != 0);
newCond.SetAckRequired(EventNotification.AckRequired);
newCond.ConditionId = EventNotification.ConditionId;
newCond.AcknowledgeMethod = EventNotification.AcknowledgeMethod;
OPCSubcondition subCond = new OPCSubcondition(newCond.SubconditionName, newCond.Message, "", newCond.Severity);
newCond.push_back_subcondition(subCond);
for (int i = 0; i < areas.Length; i++)
{
newCond.push_back_area(areas[i]);
}
// Insert standard attribute "AckComment"
newCond.push_back_attrval(Global.TheGlobal.StdAttrIds[0], newCond.AckComment);
// Insert standard attribute "Areas"
newCond.push_back_attrval(Global.TheGlobal.StdAttrIds[1], areas);
foreach (KeyValuePair <int, object> kvp in EventNotification.EventAttributes)
{
newCond.push_back_attrval(kvp.Key, kvp.Value);
}
if (newCond.IsEnabled())
{
lock (Global.TheGlobal)
{
Global.TheGlobal.NotifyClients(EventNotification.SourceID, EventNotification.ConditionName, newCond);
}
}
}
catch (Exception e)
{
Utils.Trace(e, "Unexpected error in ProcessCondition");
}
// Utils.Trace("ProcessCondition - END Source: {0}, condition: {1}, conditionstate: {2}",
// EventNotification.SourceID, EventNotification.ConditionName, newCond.NewState);
}
/// <summary>
/// Force a refresh for all active conditions and inactive, unacknowledged conditions whose event notifications match the filter of the event subscription.
/// </summary>
/// <param name="dwConnection">The OLE Connection number returned from IConnectionPoint::Advise. This is passed to help the server determine which OPC event sink to call when the request completes.</param>
public void Refresh(int dwConnection)
{
try
{
if (m_RefreshID != 0 || m_RefreshQ.Count != 0)
{
throw ComUtils.CreateComException("Refresh", ResultIds.E_BUSY);
}
m_RefreshID = dwConnection;
// Foe each source walk through all associated conditions. If the condition is "refreshable", i.e. Active or
// inactive/unacknowledged, then create an event and push it on to the subscription's refresh queue
SourceMap sourceMap = SourceMap.TheSourceMap;
foreach (KeyValuePair <string, ConditionMap> kvp in sourceMap)
{
string sourceName = kvp.Key;
ConditionMap conditionMap = kvp.Value;
foreach (KeyValuePair <string, OPCCondition> kvpCond in conditionMap)
{
string conditionName = kvpCond.Key;
OPCCondition cond = kvpCond.Value;
if (cond.IsEnabled() && (cond.IsActive() || !cond.IsAcked()))
{
OnEventClass OEClass = new OnEventClass(sourceName, conditionName, cond);
if (MatchesFilter(OEClass))
{
m_RefreshQ.Enqueue(OEClass);
}
}
}
}
if (m_RefreshQ.Count > 0)
{
ThreadPool.QueueUserWorkItem(new WaitCallback(ThreadWork), null);
}
else
{
CancelRefresh(dwConnection);
}
}
catch (Exception e)
{
Utils.Trace(e, "Unexpected error in Refresh");
throw ComUtils.CreateComException(e);
}
}
