private void StartMonitoringService()
{
const string monitoringServiceName = Constants.LocalWorkerMonitoringServiceName;
var serviceState = ServicesHelper.GetServiceState(monitoringServiceName);
if (serviceState.Equals(ServiceState.Running))
{
this.Logger.Information("{Service} is running.", monitoringServiceName);
return;
}
this.Logger.Information("Attempting to start the {Service}...", monitoringServiceName);
if (serviceState.Equals(ServiceState.NotFound))
{
ServicesHelper.InstallService(monitoringServiceName, Settings.MonitoringServiceExecutablePath);
}
ServicesHelper.StartService(monitoringServiceName);
this.Logger.Information("{Service} started successfully.", monitoringServiceName);
}
private void OnTimerElapsed(object sender, ElapsedEventArgs args)
{
const string localWorkerName = Constants.LocalWorkerServiceName;
try
{
var localWorkerState = ServicesHelper.GetServiceState(localWorkerName);
switch (localWorkerState)
{
case ServiceState.NotFound:
logger.Warn($"{localWorkerName} is not found.");
InstallAndStartLocalWorker();
break;
case ServiceState.Running:
this.totalChecksCount = 0;
this.failsToStartCount = 0;
this.numberOfTotalChecksBeforeSendingEmail = NumberOfTotalChecksBeforeSendingEmail;
this.numberOfFailedStartsBeforeSendingEmail = NumberOfFailedStartsBeforeSendingEmail;
break;
case ServiceState.StartPending:
logger.Info($"{localWorkerName} is starting...");
break;
case ServiceState.ContinuePending:
logger.Warn($"{localWorkerName} is resuming...");
break;
case ServiceState.StopPending:
logger.Warn($"{localWorkerName} is stopping...");
StartLocalWorker();
break;
case ServiceState.Stopped:
logger.Warn($"{localWorkerName} is stopped.");
StartLocalWorker();
break;
case ServiceState.PausePending:
logger.Warn($"{localWorkerName} is pausing...");
StartLocalWorker();
break;
case ServiceState.Paused:
logger.Warn($"{localWorkerName} is paused.");
StartLocalWorker();
break;
case ServiceState.Unknown:
throw new ArgumentException($"{localWorkerName} is in unknown state.");
default:
throw new ArgumentOutOfRangeException(nameof(localWorkerState));
}
}
catch (Exception ex)
{
this.failsToStartCount++;
logger.Error($"An exception was thrown while attempting to start the {localWorkerName}", ex);
}
this.totalChecksCount++;
if (this.failsToStartCount <= this.numberOfFailedStartsBeforeSendingEmail &&
this.totalChecksCount <= this.numberOfTotalChecksBeforeSendingEmail)
{
return;
}
var messageTitle = $"{localWorkerName} cannot keep Running state";
var messageBody =
$"{localWorkerName} has started and stopped consecutively more than {this.totalChecksCount} times.";
if (this.failsToStartCount > this.numberOfFailedStartsBeforeSendingEmail)
{
messageTitle = $"{localWorkerName} failed to start";
messageBody = $"{localWorkerName} failed to start more than {this.failsToStartCount} times.";
}
try
{
this.emailSender.SendEmail(
this.devEmail,
messageTitle,
messageBody);
this.numberOfFailedStartsBeforeSendingEmail *= 2;
this.numberOfTotalChecksBeforeSendingEmail *= 2;
}
catch (Exception ex)
{
logger.Error($"An exception was thrown while sending email to {this.devEmail}", ex);
}
}