/// <summary>
/// Create an alert if conditions are met.
/// </summary>
ContosoPerformanceStatus UpdateAlert(
ContosoTopologyNode node,
double value,
DateTime time,
ContosoPerformanceSetting setting,
ContosoAlertCause causeMin = ContosoAlertCause.AlertCauseValueBelowMinimum,
ContosoAlertCause causeMax = ContosoAlertCause.AlertCauseValueAboveMaximum)
{
if (value != 0 && value < setting.Minimum)
{
ContosoAlert alert = new ContosoAlert(causeMin, node.Key, time);
node.AddAlert(alert);
node.Status = ContosoPerformanceStatus.Poor;
}
else if (value != 0 && value > setting.Maximum)
{
ContosoAlert alert = new ContosoAlert(causeMax, node.Key, time);
node.AddAlert(alert);
node.Status = ContosoPerformanceStatus.Poor;
}
else
{
node.Status = ContosoPerformanceStatus.Good;
}
return(node.Status);
}
/// <summary>
/// Lookup the alert with alertId.
/// </summary>
public ContosoAlert FindAlert(long alertId)
{
List <string> allTopologyNodeKeys = GetAllChildren(TopologyRoot.Key);
allTopologyNodeKeys.Add(TopologyRoot.Key);
foreach (var key in allTopologyNodeKeys)
{
ContosoTopologyNode topologyNode = TopologyTable[key] as ContosoTopologyNode;
if (topologyNode == null)
{
Trace.TraceError($"Can not find node with key '{key}' in the topology.");
return(null);
}
// Check the node for the alert id.
ContosoAlert alert = topologyNode.FindAlert(alertId);
// Return when found.
if (alert != null)
{
return(alert);
}
}
Trace.TraceError($"Can not find alert with id '{alertId}'.");
return(null);
}
/// <summary>
/// The alert is added to the alert list of this node.
/// </summary>
public void AddAlert(ContosoAlert alert)
{
lock (_alertsLock)
{
Alerts.Add(alert);
}
}
/// <summary>
/// The all alerts, which have the same cause and are older then the given one are deleted.
/// </summary>
public bool CloseAlert(long alertId)
{
lock (_alertsLock)
{
// Verify existence of the alertId.
ContosoAlert alert = Alerts.Find(x => x.AlertId == alertId);
if (alert == null)
{
Trace.TraceError($"alertId '{alertId}' in node '{Key}' can not be found.");
return(false);
}
// Fail if the alert is not yet acknowledged.
if (alert.Status != ContosoAlertStatus.AlertStatusAcknowledged)
{
Trace.TraceError($"alert with alertId '{alertId}' in node '{Key}' can not be closed, since it is not acknowledged ('{alert.Status}')");
return(false);
}
// Close all older alerts.
List <ContosoAlert> oldAlerts = Alerts.FindAll(x => (x.Time <= alert.Time && x.Cause == alert.Cause));
foreach (var alertToRemove in oldAlerts)
{
Alerts.RemoveAll(x => x == alertToRemove);
}
}
return(true);
}
/// <summary>
/// Create alert information for the UX from the given alert.
/// </summary>
private ContosoAlertInfo CreateDashboardAlertInfo(ContosoAlert alert, long sameCauseAlertsCount, string nodeKey)
{
ContosoAlertInfo alertInfo = new ContosoAlertInfo();
ContosoTopologyNode topologyNode = TopologyTable[alert.Key] as ContosoTopologyNode;
alertInfo.AlertId = alert.AlertId;
alertInfo.CauseDescription = alert.GetAlertCauseDescription();
alertInfo.Cause = alert.Cause;
alertInfo.Occurences = sameCauseAlertsCount;
List <string> parentList = GetFullHierarchy(nodeKey);
alertInfo.TopologyDetails = new string[ContosoAlertInfo.MaxTopologyDetailsCount];
int index = 0;
if (parentList.Count == 1)
{
alertInfo.TopologyDetails[index] = topologyNode.Name;
}
else
{
parentList.Reverse();
parentList.RemoveAt(0);
foreach (var parent in parentList)
{
ContosoTopologyNode parentNode = (ContosoTopologyNode)TopologyTable[parent];
alertInfo.TopologyDetails[index++] = parentNode.Name;
}
// Check if the alert has been caused by an OPC UA node value.
if (alert.SubKey != "null")
{
OpcUaNode opcUaNode = ((Station)TopologyTable[alert.Key]).GetOpcUaNode(alert.SubKey);
alertInfo.TopologyDetails[index] = opcUaNode.SymbolicName;
}
}
alertInfo.Key = alert.Key;
alertInfo.SubKey = alert.SubKey;
alertInfo.UxTime = string.Format("{0}-{1}", alert.Time.ToString("t"), alert.Time.ToString("d"));
alertInfo.Time = alert.Time;
alertInfo.Status = alert.Status;
alertInfo.AlertActionInfo = topologyNode.CreateAlertActionInfo(alert.Cause, alert.SubKey);
return(alertInfo);
}
/// <summary>
/// Create alert information for the UX from the given alert.
/// </summary>
private ContosoAlertInfo CreateDashboardAlertInfo(ContosoAlert alert, long sameCauseAlertsCount, string nodeKey)
{
ContosoAlertInfo alertInfo = new ContosoAlertInfo();
ContosoTopologyNode topologyNode = TopologyTable[alert.Key] as ContosoTopologyNode;
alertInfo.AlertId = alert.AlertId;
alertInfo.Cause = alert.Cause;
alertInfo.Occurences = sameCauseAlertsCount;
List <string> parentList = GetFullHierarchy(nodeKey);
alertInfo.TopologyDetails = new string[ContosoAlertInfo.MaxTopologyDetailsCount];
int index = 0;
if (parentList.Count == 1)
{
alertInfo.TopologyDetails[index] = topologyNode.Name;
}
else
{
parentList.Reverse();
parentList.RemoveAt(0);
foreach (var parent in parentList)
{
ContosoTopologyNode parentNode = (ContosoTopologyNode)TopologyTable[parent];
alertInfo.TopologyDetails[index++] = parentNode.Name;
}
// Check if the alert has been caused by an OPC UA node value.
if (alert.SubKey != "null")
{
ContosoOpcUaNode contosoOpcUaNode = Startup.Topology.GetOpcUaNode(alert.Key, alert.SubKey);
alertInfo.TopologyDetails[index] = contosoOpcUaNode.SymbolicName;
alertInfo.Maximum = contosoOpcUaNode.Maximum;
alertInfo.Minimum = contosoOpcUaNode.Minimum;
}
else
{
switch (alert.Cause)
{
case ContosoAlertCause.AlertCauseOeeOverallBelowMinimum:
case ContosoAlertCause.AlertCauseOeeOverallAboveMaximum:
alertInfo.Maximum = topologyNode.OeeOverallPerformanceSetting.Maximum;
alertInfo.Minimum = topologyNode.OeeOverallPerformanceSetting.Minimum;
break;
case ContosoAlertCause.AlertCauseOeeAvailabilityBelowMinimum:
case ContosoAlertCause.AlertCauseOeeAvailabilityAboveMaximum:
alertInfo.Maximum = topologyNode.OeeAvailabilityPerformanceSetting.Maximum;
alertInfo.Minimum = topologyNode.OeeAvailabilityPerformanceSetting.Minimum;
break;
case ContosoAlertCause.AlertCauseOeePerformanceBelowMinimum:
case ContosoAlertCause.AlertCauseOeePerformanceAboveMaximum:
alertInfo.Maximum = topologyNode.OeePerformancePerformanceSetting.Maximum;
alertInfo.Minimum = topologyNode.OeePerformancePerformanceSetting.Minimum;
break;
case ContosoAlertCause.AlertCauseOeeQualityBelowMinimum:
case ContosoAlertCause.AlertCauseOeeQualityAboveMaximum:
alertInfo.Maximum = topologyNode.OeeQualityPerformanceSetting.Maximum;
alertInfo.Minimum = topologyNode.OeeQualityPerformanceSetting.Minimum;
break;
case ContosoAlertCause.AlertCauseKpi1BelowMinimum:
case ContosoAlertCause.AlertCauseKpi1AboveMaximum:
alertInfo.Maximum = topologyNode.Kpi1PerformanceSetting.Maximum;
alertInfo.Minimum = topologyNode.Kpi1PerformanceSetting.Minimum;
break;
case ContosoAlertCause.AlertCauseKpi2BelowMinimum:
case ContosoAlertCause.AlertCauseKpi2AboveMaximum:
alertInfo.Maximum = topologyNode.Kpi2PerformanceSetting.Maximum;
alertInfo.Minimum = topologyNode.Kpi2PerformanceSetting.Minimum;
break;
}
}
}
alertInfo.Key = alert.Key;
alertInfo.SubKey = alert.SubKey;
alertInfo.UxTime = string.Format("{0}-{1}", alert.Time.ToString("t"), alert.Time.ToString("d"));
alertInfo.Time = alert.Time;
alertInfo.Status = alert.Status;
alertInfo.AlertActionInfo = topologyNode.CreateAlertActionInfo(alert.Cause, alert.SubKey);
return(alertInfo);
}
/// <summary>
/// Gets alert information for the given topology node and all nodes below it.
/// Multiple alerts with the same cause are consolidated and only the time information for the newest alert is returned.
/// This information will be shown in the UX.
/// </summary>
public List <ContosoAlertInfo> GetAlerts(string key)
{
List <ContosoAlert> alertList = GetAllAlerts(key);
List <ContosoAlertInfo> dashboardAlerts = new List <ContosoAlertInfo>();
ContosoAlertCause dummyAlertCause = new ContosoAlertCause();
ContosoAlertInfo dashboardAlert = new ContosoAlertInfo();
if (alertList.Count == 0)
{
return(dashboardAlerts);
}
List <string> allNodeKey = GetAllChildren(key);
// Add key itself as well.
allNodeKey.Add(key);
foreach (var nodeKey in allNodeKey)
{
ContosoTopologyNode topologyNode = TopologyTable[nodeKey] as ContosoTopologyNode;
List <ContosoAlert> childAlerts = topologyNode.Alerts;
if (childAlerts.Count > 0)
{
if (topologyNode.GetType() == typeof(Station))
{
Station station = topologyNode as Station;
// The OPC UA nodes only generate value alerts.
foreach (var opcNode in station.NodeList)
{
foreach (ContosoAlertCause alertCause in Enum.GetValues(dummyAlertCause.GetType()))
{
if (alertCause == ContosoAlertCause.AlertCauseValueBelowMinimum ||
alertCause == ContosoAlertCause.AlertCauseValueAboveMaximum)
{
// Aggregate similar alerts.
List <ContosoAlert> sameCauseAlerts = childAlerts.FindAll(x => (x.Cause == alertCause && x.Key == nodeKey && x.SubKey == opcNode.NodeId && x.Time != DateTime.MinValue));
if (sameCauseAlerts.Count > 0)
{
// Find the newest alert.
long newestTicks = sameCauseAlerts.Max(x => x.Time.Ticks);
ContosoAlert alert = sameCauseAlerts.Find(x => x.Time.Ticks == newestTicks);
// Create alert dashboard info and add it to the dashboard alert list.
dashboardAlert = CreateDashboardAlertInfo(alert, sameCauseAlerts.Count, nodeKey);
dashboardAlerts.Add(dashboardAlert);
}
}
}
}
// For the station node we handle performance alerts.
foreach (ContosoAlertCause alertCause in Enum.GetValues(dummyAlertCause.GetType()))
{
if (alertCause == ContosoAlertCause.AlertCauseValueBelowMinimum ||
alertCause == ContosoAlertCause.AlertCauseValueAboveMaximum)
{
continue;
}
// Aggregate similar alerts.
List <ContosoAlert> sameCauseAlerts = childAlerts.FindAll(x => (x.Cause == alertCause && x.Key == nodeKey && x.Time != DateTime.MinValue));
if (sameCauseAlerts.Count > 0)
{
// Find the newest alert.
long newestTicks = sameCauseAlerts.Max(x => x.Time.Ticks);
ContosoAlert alert = sameCauseAlerts.Find(x => x.Time.Ticks == newestTicks);
// Create alert dashboard info and add it to the dashboard alert list.
dashboardAlert = CreateDashboardAlertInfo(alert, sameCauseAlerts.Count, nodeKey);
dashboardAlerts.Add(dashboardAlert);
}
}
}
else
{
foreach (ContosoAlertCause alertCause in Enum.GetValues(dummyAlertCause.GetType()))
{
// Aggregate similar alerts.
List <ContosoAlert> sameCauseAlerts = childAlerts.FindAll(x => (x.Cause == alertCause && x.Key == nodeKey && x.Time != DateTime.MinValue));
if (sameCauseAlerts.Count > 0)
{
// Find the newest alert.
long newestTicks = sameCauseAlerts.Max(x => x.Time.Ticks);
ContosoAlert alert = sameCauseAlerts.Find(x => x.Time.Ticks == newestTicks);
// Create alert dashboard info and add it to the dashboard alert list.
dashboardAlert = CreateDashboardAlertInfo(alert, sameCauseAlerts.Count, nodeKey);
dashboardAlerts.Add(dashboardAlert);
}
}
}
}
}
dashboardAlerts.Sort(delegate(ContosoAlertInfo x, ContosoAlertInfo y)
{
if (x.Time < y.Time)
{
return(1);
}
if (x.Time == y.Time)
{
return(0);
}
return(-1);
});
return(dashboardAlerts);
}