/// <summary>
/// Creates a new instance of the <see cref="SerializableAlarm"/> class.
/// </summary>
/// <param name="sourceAlarm"><see cref="Alarm"/> from which <see cref="SerializableAlarm"/> is to be initialized.</param>
public SerializableAlarm(Alarm sourceAlarm)
{
ID = sourceAlarm.ID;
TagName = sourceAlarm.TagName;
Severity = (int)sourceAlarm.Severity;
State = sourceAlarm.State;
SignalID = sourceAlarm.SignalID.ToString();
TimeRaised = ((DateTime)sourceAlarm.Cause.Timestamp).ToString("MM/dd/yyyy HH:mm:ss");
ValueAtTimeRaised = sourceAlarm.Cause.AdjustedValue;
Description = sourceAlarm.Description;
Operation = (int)sourceAlarm.Operation;
SetPoint = sourceAlarm.SetPoint ?? default(double);
Tolerance = sourceAlarm.Tolerance ?? default(double);
Delay = sourceAlarm.Delay ?? default(double);
Hysteresis = sourceAlarm.Hysteresis ?? default(double);
}
// Writes an entry to the alarm log when the alarm state changes.
private void LogStateChange(Guid signalID, Alarm oldState, Alarm newState, DateTime timestamp, double value)
{
int? oldStateID;
int? newStateID;
if (m_useAlarmLog)
{
oldStateID = ((object)oldState != null) ? oldState.ID : (int?)null;
newStateID = ((object)newState != null) ? newState.ID : (int?)null;
StateChange stateChange = new StateChange()
{
SignalID = signalID,
OldStateID = oldStateID,
NewStateID = newStateID,
Timestamp = timestamp,
Value = value
};
m_stateChanges.Enqueue(new StateChange[] { stateChange });
m_alarmLogOperation.RunOnceAsync();
}
}
// Creates an alarm event from the given alarm and measurement.
private IMeasurement CreateAlarmEvent(Ticks timestamp, Alarm alarm)
{
IMeasurement alarmEvent = new Measurement()
{
Timestamp = timestamp,
Value = (int)alarm.State
};
if ((object)alarm.AssociatedMeasurementID != null)
{
Guid alarmEventID = alarm.AssociatedMeasurementID.GetValueOrDefault();
alarmEvent.Key = MeasurementKey.LookUpBySignalID(alarmEventID);
}
return alarmEvent;
}
// Returns true if a change to the alarm's configuration also changed the alarm's behavior.
private bool BehaviorChanged(Alarm existingAlarm, Alarm definedAlarm)
{
return (object)definedAlarm == null ||
(existingAlarm.SignalID != definedAlarm.SignalID) ||
(existingAlarm.AssociatedMeasurementID != definedAlarm.AssociatedMeasurementID) ||
(existingAlarm.Operation != definedAlarm.Operation) ||
(existingAlarm.SetPoint != definedAlarm.SetPoint) ||
(existingAlarm.Tolerance != definedAlarm.Tolerance) ||
(existingAlarm.Delay != definedAlarm.Delay) ||
(existingAlarm.Hysteresis != definedAlarm.Hysteresis);
}
/// <summary>
/// Increments the counter for the given alarm.
/// </summary>
/// <param name="alarm">The alarm that was raised.</param>
public void IncrementCounter(Alarm alarm)
{
m_countBySeverity.AddOrUpdate((int)alarm.Severity, severity => 1L, (severity, count) => count + 1L);
}