/// <summary>
/// Finds the category for the event.
/// </summary>
private AeEventCategory FindCategory(Session session, AeEvent e)
{
AeEventCategory category = m_mapper.GetCategory(e.EventType);
NodeId subTypeId = e.EventType;
NodeId superTypeId = null;
// follow the type tree if type not recognized.
while (category == null)
{
superTypeId = session.NodeCache.FindSuperType(subTypeId);
if (!NodeId.IsNull(superTypeId))
{
category = m_mapper.GetCategory(superTypeId);
if (category != null)
{
return(category);
}
}
subTypeId = superTypeId;
}
// default to base event type.
if (category == null)
{
category = m_mapper.GetCategory(Opc.Ua.ObjectTypeIds.BaseEventType);
}
return(category);
}
/// <summary>
/// Processes an event (assigns a cookie if acknowledgment is required).
/// </summary>
public void ProcessEvent(AeEvent e)
{
if (NodeId.IsNull(e.ConditionId))
{
return;
}
lock (m_lock)
{
string conditionId = GetConditionId(e);
// assign a cookie to the condition/branch.
int cookie = 0;
if (!m_cookies.TryGetValue(conditionId, out cookie))
{
cookie = ++m_counter;
m_cookies[conditionId] = cookie;
}
// remove acked events.
if (e.AckedState)
{
m_events.Remove(cookie);
m_cookies.Remove(conditionId);
}
// save event for acking.
else
{
m_events[cookie] = e;
e.Cookie = cookie;
}
}
}
/// <summary>
/// Processes an event (assigns a cookie if acknowledgment is required).
/// </summary>
public void ProcessEvent(AeEvent e)
{
if (NodeId.IsNull(e.ConditionId))
{
return;
}
lock (m_lock)
{
string conditionId = GetConditionId(e);
// assign a cookie to the condition/branch.
int cookie = 0;
if (!m_cookies.TryGetValue(conditionId, out cookie))
{
cookie = ++m_counter;
m_cookies[conditionId] = cookie;
}
// remove acked events.
if (e.AckedState)
{
m_events.Remove(cookie);
m_cookies.Remove(conditionId);
}
// save event for acking.
else
{
m_events[cookie] = e;
e.Cookie = cookie;
}
}
}
/// <summary>
/// Combines the condition id/branch id in a unique identifier.
/// </summary>
private string GetConditionId(AeEvent e)
{
StringBuilder buffer = new StringBuilder();
buffer.Append(e.ConditionId);
if (NodeId.IsNull(e.BranchId))
{
buffer.Append(e.BranchId);
}
return(buffer.ToString());
}
/// <summary>
/// Marshals an event for return to the client.
/// </summary>
private OpcRcw.Ae.ONEVENTSTRUCT Translate(AeEvent e)
{
OpcRcw.Ae.ONEVENTSTRUCT e2 = new ONEVENTSTRUCT();
e2.wNewState = 0;
e2.wChangeMask = 0xFF;
e2.szSource = e.SourceName;
e2.wQuality = ComUtils.GetQualityCode(e.Quality);
e2.dwEventType = e.Category.EventType;
e2.dwEventCategory = (int)e.Category.LocalId;
e2.bAckRequired = 0;
e2.dwSeverity = e.Severity;
e2.ftTime = ComUtils.GetFILETIME(e.Time);
e2.szMessage = (e.Message != null) ? e.Message.Text : null;
e2.szActorID = e.AuditUserId;
e2.dwCookie = e.Cookie;
if (e.AttributeValues != null && e.AttributeValues.Length > 0)
{
e2.dwNumEventAttrs = e.AttributeValues.Length;
e2.pEventAttributes = ComUtils.GetVARIANTs(e.AttributeValues, true);
}
if ((e2.dwEventType & OpcRcw.Ae.Constants.CONDITION_EVENT) != 0)
{
e2.szConditionName = e.ConditionName;
e2.ftActiveTime = ComUtils.GetFILETIME(e.ActiveTime);
e2.bAckRequired = (e.AckedState)?0:1;
// set the condition state.
e2.wNewState = 0;
if (e.EnabledState)
{
e2.wNewState |= OpcRcw.Ae.Constants.CONDITION_ENABLED;
}
if (e.AckedState)
{
e2.wNewState |= OpcRcw.Ae.Constants.CONDITION_ACKED;
}
if (e.ActiveState)
{
e2.wNewState |= OpcRcw.Ae.Constants.CONDITION_ACTIVE;
}
// set the subcondition if available.
if (!LocalizedText.IsNullOrEmpty(e.LowState))
{
e2.szSubconditionName = e.LowState.Text;
}
if (!LocalizedText.IsNullOrEmpty(e.HighState))
{
e2.szSubconditionName = e.HighState.Text;
}
if (!LocalizedText.IsNullOrEmpty(e.LowLowState))
{
e2.szSubconditionName = e.LowLowState.Text;
}
if (!LocalizedText.IsNullOrEmpty(e.HighHighState))
{
e2.szSubconditionName = e.HighHighState.Text;
}
if (!LocalizedText.IsNullOrEmpty(e.LimitState))
{
e2.szSubconditionName = e.LimitState.Text;
}
}
if (e2.szMessage == null) e2.szMessage = String.Empty;
if (e2.szSource == null) e2.szSource = String.Empty;
if (e2.szConditionName == null) e2.szConditionName = String.Empty;
if (e2.szSubconditionName == null) e2.szSubconditionName = String.Empty;
if (e2.szActorID == null) e2.szActorID = String.Empty;
return e2;
}
/// <summary>
/// Acknowledges one or more events.
/// </summary>
public int[] AcknowledgeEvents(
Session session,
string comment,
string acknowledgerId,
AeAcknowledgeRequest[] requests)
{
if (session == null || !session.Connected)
{
throw ComUtils.CreateComException(ResultIds.E_FAIL);
}
StringBuilder buffer = new StringBuilder();
buffer.Append('[');
buffer.Append(acknowledgerId);
buffer.Append(']');
if (!String.IsNullOrEmpty(comment))
{
buffer.Append(comment);
}
// wrap the comment once.
Variant commentToWrite = new Variant(new LocalizedText(buffer.ToString()));
int[] errors = new int[requests.Length];
CallMethodRequestCollection methodsToCall = new CallMethodRequestCollection();
for (int ii = 0; ii < requests.Length; ii++)
{
int cookie = requests[ii].Cookie;
AeEvent e = null;
lock (m_lock)
{
// look up the event.
if (!m_events.TryGetValue(cookie, out e))
{
errors[ii] = ResultIds.E_INVALIDARG;
if (cookie < m_counter)
{
errors[ii] = ResultIds.S_ALREADYACKED;
}
continue;
}
if (e.SourceName != requests[ii].SourceName)
{
errors[ii] = ResultIds.E_INVALIDARG;
continue;
}
if (e.ConditionName != requests[ii].ConditionName)
{
errors[ii] = ResultIds.E_INVALIDARG;
continue;
}
if (e.ActiveTime != requests[ii].ActiveTime)
{
errors[ii] = ResultIds.E_INVALIDTIME;
continue;
}
// check that the cookie is still valid.
string conditionId = GetConditionId(e);
int expectedCookie = 0;
if (!m_cookies.TryGetValue(conditionId, out expectedCookie))
{
errors[ii] = ResultIds.S_ALREADYACKED;
continue;
}
// check cookie.
if (expectedCookie != cookie)
{
errors[ii] = ResultIds.E_INVALIDARG;
continue;
}
m_events.Remove(cookie);
}
CallMethodRequest request = new CallMethodRequest();
request.MethodId = Opc.Ua.MethodIds.AcknowledgeableConditionType_Acknowledge;
request.ObjectId = e.ConditionId;
request.InputArguments.Add(new Variant(e.EventId));
request.InputArguments.Add(commentToWrite);
request.Handle = ii;
methodsToCall.Add(request);
}
if (methodsToCall.Count > 0)
{
try
{
// call the server.
CallMethodResultCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
session.Call(
null,
methodsToCall,
out results,
out diagnosticInfos);
// verify that the server returned the correct number of results.
ClientBase.ValidateResponse(results, methodsToCall);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, methodsToCall);
// process results.
for (int ii = 0; ii < methodsToCall.Count; ii++)
{
int index = (int)methodsToCall[ii].Handle;
if (StatusCode.IsBad(results[ii].StatusCode))
{
errors[ii] = ResultIds.E_FAIL;
continue;
}
}
}
catch (Exception)
{
// report error.
for (int ii = 0; ii < methodsToCall.Count; ii++)
{
int index = (int)methodsToCall[ii].Handle;
errors[ii] = ResultIds.E_FAIL;
}
}
}
return(errors);
}
/// <summary>
/// Translates an event notification in an AE event.
/// </summary>
public AeEvent TranslateNotification(Session session, EventFieldList e)
{
AeEvent e2 = new AeEvent();
// extract the required event fields.
int index = 0;
e2.EventId = ExtractField <byte[]>(e, index++, null);
e2.EventType = ExtractField <NodeId>(e, index++, null);
e2.SourceName = ExtractField <string>(e, index++, null);
e2.Time = ExtractField <DateTime>(e, index++, DateTime.MinValue);
e2.Message = ExtractField <LocalizedText>(e, index++, null);
e2.Severity = ExtractField <ushort>(e, index++, 0);
if ((EventTypes & OpcRcw.Ae.Constants.TRACKING_EVENT) != 0)
{
e2.AuditUserId = ExtractField <string>(e, index++, null);
}
if ((EventTypes & OpcRcw.Ae.Constants.CONDITION_EVENT) != 0)
{
e2.BranchId = ExtractField <byte[]>(e, index++, null);
e2.ConditionName = ExtractField <string>(e, index++, null);
e2.Quality = ExtractField <StatusCode>(e, index++, StatusCodes.Good);
e2.Comment = ExtractField <LocalizedText>(e, index++, null);
e2.CommentUserId = ExtractField <string>(e, index++, null);
e2.EnabledState = ExtractField <bool>(e, index++, false);
e2.AckedState = ExtractField <bool>(e, index++, false);
e2.ActiveState = ExtractField <bool>(e, index++, false);
e2.ActiveTime = ExtractField <DateTime>(e, index++, DateTime.MinValue);
e2.LimitState = ExtractField <LocalizedText>(e, index++, null);
e2.HighHighState = ExtractField <LocalizedText>(e, index++, null);
e2.HighState = ExtractField <LocalizedText>(e, index++, null);
e2.LowState = ExtractField <LocalizedText>(e, index++, null);
e2.LowLowState = ExtractField <LocalizedText>(e, index++, null);
// condition id is always last.
e2.ConditionId = ExtractField <NodeId>(e, e.EventFields.Count - 1, null);
}
// find the category for the event.
e2.Category = FindCategory(session, e2);
// extract any additional attributes.
if (RequestedAttributeIds != null)
{
uint[] attributeIds = null;
if (!RequestedAttributeIds.TryGetValue(e2.Category.LocalId, out attributeIds))
{
return(e2);
}
// nothing more to do.
if (attributeIds == null || attributeIds.Length == 0)
{
return(e2);
}
// search for the requested attributes.
object[] values = new object[attributeIds.Length];
for (int ii = 0; ii < attributeIds.Length; ii++)
{
// look for matching attribute.
for (int jj = 0; jj < SelectedAttributes.Count; jj++)
{
if (jj >= e.EventFields.Count)
{
break;
}
AeEventAttribute attribute = SelectedAttributes[jj];
if (attribute == null || attribute.LocalId != attributeIds[ii])
{
continue;
}
values[ii] = GetLocalAttributeValue(e.EventFields[jj], attribute);
}
}
e2.AttributeValues = values;
}
return(e2);
}
/// <summary>
/// Combines the condition id/branch id in a unique identifier.
/// </summary>
private string GetConditionId(AeEvent e)
{
StringBuilder buffer = new StringBuilder();
buffer.Append(e.ConditionId);
if (NodeId.IsNull(e.BranchId))
{
buffer.Append(e.BranchId);
}
return buffer.ToString();
}
private void OnEventNotification(Subscription subscription, EventNotificationList notification, IList <string> stringTable)
{
try
{
// check if disposed.
if (m_disposed)
{
return;
}
// check if session still active.
Session session = m_server.Session;
if (session == null || !session.Connected)
{
return;
}
// check if events are being reported.
if (m_callback == null)
{
return;
}
lock (m_lock)
{
foreach (EventFieldList e in notification.Events)
{
// translate the notification and send the response.
AeEvent e2 = m_filter.TranslateNotification(m_server.Session, e);
if (e2 != null)
{
// check if refresh has started.
if (e2.EventType == Opc.Ua.ObjectTypeIds.RefreshStartEventType)
{
m_refreshInProgress = true;
continue;
}
// check if refresh has ended.
if (e2.EventType == Opc.Ua.ObjectTypeIds.RefreshEndEventType)
{
m_refreshInProgress = false;
// turn off publishing if the subscription is not active,
if (!Active)
{
m_subscription.SetPublishingMode(false);
List <MonitoredItem> itemsToUpdate = new List <MonitoredItem>(m_notifiers.Values);
m_subscription.SetMonitoringMode(MonitoringMode.Disabled, itemsToUpdate);
}
if (m_refreshQueue != null)
{
ThreadPool.QueueUserWorkItem(DoRefresh, m_refreshQueue);
}
continue;
}
// cache any conditions requiring acknowledgement.
m_conditionManager.ProcessEvent(e2);
// queue on refresh.
if (m_refreshInProgress)
{
if (m_refreshQueue != null)
{
m_refreshQueue.Enqueue(e2);
}
continue;
}
// queue the event.
if (Active)
{
lock (m_queue)
{
m_queue.Enqueue(e2);
}
}
}
}
}
}
catch (Exception exception)
{
Utils.Trace(exception, "Error processing event callback.");
}
}
/// <summary>
/// Marshals an event for return to the client.
/// </summary>
private OpcRcw.Ae.ONEVENTSTRUCT Translate(AeEvent e)
{
OpcRcw.Ae.ONEVENTSTRUCT e2 = new ONEVENTSTRUCT();
e2.wNewState = 0;
e2.wChangeMask = 0xFF;
e2.szSource = e.SourceName;
e2.wQuality = ComUtils.GetQualityCode(e.Quality);
e2.dwEventType = e.Category.EventType;
e2.dwEventCategory = (int)e.Category.LocalId;
e2.bAckRequired = 0;
e2.dwSeverity = e.Severity;
e2.ftTime = ComUtils.GetFILETIME(e.Time);
e2.szMessage = (e.Message != null) ? e.Message.Text : null;
e2.szActorID = e.AuditUserId;
e2.dwCookie = e.Cookie;
if (e.AttributeValues != null && e.AttributeValues.Length > 0)
{
e2.dwNumEventAttrs = e.AttributeValues.Length;
e2.pEventAttributes = ComUtils.GetVARIANTs(e.AttributeValues, true);
}
if ((e2.dwEventType & OpcRcw.Ae.Constants.CONDITION_EVENT) != 0)
{
e2.szConditionName = e.ConditionName;
e2.ftActiveTime = ComUtils.GetFILETIME(e.ActiveTime);
e2.bAckRequired = (e.AckedState)?0:1;
// set the condition state.
e2.wNewState = 0;
if (e.EnabledState)
{
e2.wNewState |= OpcRcw.Ae.Constants.CONDITION_ENABLED;
}
if (e.AckedState)
{
e2.wNewState |= OpcRcw.Ae.Constants.CONDITION_ACKED;
}
if (e.ActiveState)
{
e2.wNewState |= OpcRcw.Ae.Constants.CONDITION_ACTIVE;
}
// set the subcondition if available.
if (!LocalizedText.IsNullOrEmpty(e.LowState))
{
e2.szSubconditionName = e.LowState.Text;
}
if (!LocalizedText.IsNullOrEmpty(e.HighState))
{
e2.szSubconditionName = e.HighState.Text;
}
if (!LocalizedText.IsNullOrEmpty(e.LowLowState))
{
e2.szSubconditionName = e.LowLowState.Text;
}
if (!LocalizedText.IsNullOrEmpty(e.HighHighState))
{
e2.szSubconditionName = e.HighHighState.Text;
}
if (!LocalizedText.IsNullOrEmpty(e.LimitState))
{
e2.szSubconditionName = e.LimitState.Text;
}
}
if (e2.szMessage == null)
{
e2.szMessage = String.Empty;
}
if (e2.szSource == null)
{
e2.szSource = String.Empty;
}
if (e2.szConditionName == null)
{
e2.szConditionName = String.Empty;
}
if (e2.szSubconditionName == null)
{
e2.szSubconditionName = String.Empty;
}
if (e2.szActorID == null)
{
e2.szActorID = String.Empty;
}
return(e2);
}