/// <summary>
/// Starts the monitor thread, which is waiting for a new Alarm.
/// </summary>
/// <exception cref="System.InvalidOperationException">Service start failed because of one of the following reasons. - There are no running alarm sources. - A general exception occurred.</exception>
public void Start()
{
if (IsStarted)
{
return;
}
InitializeOperationStore();
InitializeRoutePlanProvider();
InitializeAlarmSources();
_jobManager = new JobManager();
_jobManager.Initialize();
// Initialize each alarm source and register event handler
int iInitializedSources = 0;
foreach (IAlarmSource alarmSource in _alarmSources)
{
try
{
alarmSource.Initialize();
alarmSource.NewAlarm += AlarmSource_NewAlarm;
// Create new thread
Thread ast = new Thread(AlarmSourceThreadWrapper);
// Use lower priority since we have many threads
ast.Priority = ThreadPriority.BelowNormal;
ast.Name = string.Format("AlarmWorkflow.Engine.Thread.$" + alarmSource.GetType().Name);
// Start the thread
_alarmSourcesThreads.Add(alarmSource, ast);
ast.Start(alarmSource);
iInitializedSources++;
}
catch (Exception ex)
{
Logger.Instance.LogFormat(LogType.Warning, this, "Error initializing alarm source '{0}'. It will not run.", alarmSource.GetType().FullName);
Logger.Instance.LogException(this, ex);
}
}
if (iInitializedSources > 0)
{
Logger.Instance.LogFormat(LogType.Info, this, "Started Service");
IsStarted = true;
return;
}
else
{
// Having no alarm sources is very critical - throw exception
Logger.Instance.LogFormat(LogType.Error, this, Properties.Resources.ServiceStartFailedNoAlarmSourceException);
throw new InvalidOperationException(Properties.Resources.ServiceStartFailedNoAlarmSourceException);
}
}
/// <summary>
/// Stops the engine and disposes all alarm sources and other plugins.
/// </summary>
public void Stop()
{
if (!IsStarted)
{
return;
}
Logger.Instance.LogFormat(LogType.Info, this, "Stopping Service");
// Dispose and kill all threads
foreach (IAlarmSource alarmSource in _alarmSources)
{
try
{
// Unregister from event and dispose source
alarmSource.NewAlarm -= AlarmSource_NewAlarm;
alarmSource.Dispose();
// Stop and remove the thread, if existing
if (_alarmSourcesThreads.ContainsKey(alarmSource))
{
Thread ast = _alarmSourcesThreads[alarmSource];
// Abort and ignore exception
ast.Abort();
_alarmSourcesThreads.Remove(alarmSource);
}
}
catch (Exception ex)
{
Logger.Instance.LogFormat(LogType.Warning, this, "Error disposing alarm source '{0}'.", alarmSource.GetType().FullName);
Logger.Instance.LogException(this, ex);
}
}
_jobManager.Dispose();
_jobManager = null;
// Dispose operation store
_operationStore = null;
// Dispose route plan provider
_routePlanProvider = null;
Logger.Instance.LogFormat(LogType.Info, this, "Stopped Service");
IsStarted = false;
}