private void StartAlgorithmProcessing()
{
try
{
AlgorithmHostingEnvironment.Start();
Framework framework = AlgorithmHostingEnvironment.Framework;
m_concentrator = framework.Concentrator;
m_subscriber = framework.Subscriber;
m_concentrator.ProcessException += ProcessExceptionHandler;
m_concentrator.FramesPerSecond = SystemSettings.FramesPerSecond;
m_concentrator.LagTime = SystemSettings.LagTime;
m_concentrator.LeadTime = SystemSettings.LeadTime;
m_concentrator.RoundToNearestTimestamp = true;
m_concentrator.Start();
m_subscriber.StatusMessage += StatusMessageHandler;
m_subscriber.ProcessException += ProcessExceptionHandler;
m_subscriber.Start();
}
catch (Exception ex)
{
HandleException(new InvalidOperationException($"Exception while creating framework for algorithm hosting environment: {ex.Message}", ex));
}
}
private void StopAlgorithmProcessing()
{
try
{
if ((object)m_subscriber != null)
{
m_subscriber.Stop();
m_subscriber.StatusMessage -= StatusMessageHandler;
m_subscriber.ProcessException -= ProcessExceptionHandler;
m_subscriber = null;
}
if ((object)m_concentrator != null)
{
m_concentrator.Stop();
m_concentrator.ProcessException -= ProcessExceptionHandler;
m_concentrator = null;
}
AlgorithmHostingEnvironment.Shutdown();
}
catch (Exception ex)
{
HandleException(new InvalidOperationException($"Exception while shutting down algorithm hosting environment: {ex.Message}", ex));
}
}
private void ServiceHelper_ServiceStarting(object sender, EventArgs <string[]> e)
{
ShutdownHandler.Initialize();
// Define a run-time log
m_runTimeLog = new RunTimeLog();
m_runTimeLog.FileName = "RunTimeLog.txt";
m_runTimeLog.ProcessException += ProcessExceptionHandler;
m_runTimeLog.Initialize();
// Create a handler for unobserved task exceptions
TaskScheduler.UnobservedTaskException += TaskScheduler_UnobservedTaskException;
// Make sure default service settings exist
ConfigurationFile configFile = ConfigurationFile.Current;
string servicePath = FilePath.GetAbsolutePath("");
string defaultLogPath = string.Format("{0}{1}Logs{1}", servicePath, Path.DirectorySeparatorChar);
// Initialize algorithm processing framework - this will define default system settings
try
{
AlgorithmHostingEnvironment.Initialize();
}
catch (Exception ex)
{
HandleException(new InvalidOperationException($"Exception while creating framework for algorithm hosting environment: {ex.Message}", ex));
}
CategorizedSettingsElementCollection systemSettings = configFile.Settings["systemSettings"];
// Makes sure exepected system settings are defined in the configuration file
systemSettings.Add("LogPath", defaultLogPath, "Defines the path used to archive log files");
systemSettings.Add("MaxLogFiles", DefaultMaxLogFiles, "Defines the maximum number of log files to keep");
systemSettings.Add("AllowRemoteRestart", DefaultAllowRemoteRestart, "Controls ability to remotely restart the host service.");
systemSettings.Add("AllowServiceMonitors", DefaultAllowServiceMonitors, "Controls ability to auto-load IServiceMonitor implementations.");
systemSettings.Add("DefaultCulture", DefaultCulture, "Default culture to use for language, country/region and calendar formats.");
systemSettings.Add("InputMapping", SystemSettings.InputMapping, "Mnput mapping used by algorithm for incoming data.");
systemSettings.Add("OutputMapping", SystemSettings.OutputMapping, "Mapping used by algorithm for outgoing data.");
systemSettings.Add("ConnectionString", SystemSettings.ConnectionString, "Connection string used by algorithm to connect to openECA data source.");
systemSettings.Add("FramesPerSecond", SystemSettings.FramesPerSecond, "Data rate, in frames per second, expected by algorithm.");
systemSettings.Add("LagTime", SystemSettings.LagTime, "Maximum past-time deviation tolerance, in seconds (can be sub-second), that the algorithm will tolerate.");
systemSettings.Add("LeadTime", SystemSettings.LeadTime, "Maximum future-time deviation tolerance, in seconds (can be sub-second), that the algorithm will tolerate.");
// Attempt to set default culture
try
{
string defaultCulture = systemSettings["DefaultCulture"].ValueAs(DefaultCulture);
CultureInfo.DefaultThreadCurrentCulture = CultureInfo.CreateSpecificCulture(defaultCulture); // Defaults for date formatting, etc.
CultureInfo.DefaultThreadCurrentUICulture = CultureInfo.CreateSpecificCulture(defaultCulture); // Culture for resource strings, etc.
}
catch (Exception ex)
{
HandleException(new InvalidOperationException($"Failed to set default culture due to exception, defaulting to \"{CultureInfo.CurrentCulture.Name.ToNonNullNorEmptyString("Undetermined")}\": {ex.Message}", ex));
}
// Retrieve application log path as defined in the config file
string logPath = FilePath.GetAbsolutePath(systemSettings["LogPath"].Value);
// Make sure log directory exists
try
{
if (!Directory.Exists(logPath))
{
Directory.CreateDirectory(logPath);
}
}
catch (Exception ex)
{
// Attempt to default back to common log file path
if (!Directory.Exists(defaultLogPath))
{
try
{
Directory.CreateDirectory(defaultLogPath);
}
catch
{
defaultLogPath = servicePath;
}
}
HandleException(new InvalidOperationException($"Failed to create logging directory \"{logPath}\" due to exception, defaulting to \"{defaultLogPath}\": {ex.Message}", ex));
logPath = defaultLogPath;
}
int maxLogFiles = systemSettings["MaxLogFiles"].ValueAs(DefaultMaxLogFiles);
try
{
Logger.FileWriter.SetPath(logPath);
Logger.FileWriter.SetLoggingFileCount(maxLogFiles);
}
catch (Exception ex)
{
HandleException(new InvalidOperationException($"Failed to set logging path \"{logPath}\" or max file count \"{maxLogFiles}\" due to exception: {ex.Message}"));
}
try
{
Directory.SetCurrentDirectory(servicePath);
}
catch (Exception ex)
{
HandleException(new InvalidOperationException($"Failed to set current directory to execution path \"{servicePath}\" due to exception: {ex.Message}"));
}
// Initialize system settings as defined in configuration file
m_allowRemoteRestart = systemSettings["AllowRemoteRestart"].ValueAs(DefaultAllowRemoteRestart);
m_allowServiceMonitors = systemSettings["AllowServiceMonitors"].ValueAs(DefaultAllowServiceMonitors);
SystemSettings.InputMapping = systemSettings["InputMapping"].ValueAs(SystemSettings.InputMapping);
SystemSettings.OutputMapping = systemSettings["OutputMapping"].ValueAs(SystemSettings.OutputMapping);
SystemSettings.ConnectionString = systemSettings["ConnectionString"].ValueAs(SystemSettings.ConnectionString);
SystemSettings.FramesPerSecond = systemSettings["FramesPerSecond"].ValueAs(SystemSettings.FramesPerSecond);
SystemSettings.LagTime = systemSettings["LagTime"].ValueAs(SystemSettings.LagTime);
SystemSettings.LeadTime = systemSettings["LeadTime"].ValueAs(SystemSettings.LeadTime);
}