/// <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);
}
}
/// <summary>
/// If the event type is CONDITION_EVENT then update any existing record of the condition and adjust
/// state and change mask.
/// </summary>
/// <param name="EventNotification"></param>
/// <param name="areas"></param>
public void ProcessEventNotificationList(EventNotification EventNotification, string[] areas)
{
SourceMap sourceMap = SourceMap.TheSourceMap;
try
{
lock (sourceMap)
{
OPCCondition cond;
if (EventNotification.EventType == OpcRcw.Ae.Constants.CONDITION_EVENT)
{
ConditionMap conditionMap;
if (sourceMap.TryGetValue(EventNotification.SourceID, out conditionMap) == false)
{
conditionMap = new ConditionMap();
sourceMap.Add(EventNotification.SourceID, conditionMap);
}
if (conditionMap.TryGetValue(EventNotification.ConditionName, out cond) == false)
{
cond = new OPCCondition();
cond.EventType = EventNotification.EventType;
conditionMap.Add(EventNotification.ConditionName, cond);
}
ProcessCondition(EventNotification, areas, cond);
// When the condition has transitioned to Acked (if ack required) and inactive or disabled
// then remove it from the condition source/condition database
if ((!cond.IsActive() || !cond.IsEnabled()) && (cond.IsAcked() || !cond.AckRequired))
{
conditionMap.Remove(EventNotification.ConditionName);
}
}
else // a tracking or simple event
{
cond = new OPCCondition();
cond.EventType = EventNotification.EventType;
ProcessCondition(EventNotification, areas, cond);
}
}
}
catch (Exception e)
{
Utils.Trace(e, "Unexpected error in ProcessEventNotificationList");
}
}
