private async Task RunBackgroundService(CancellationToken cancellationToken)
{
await Task.Yield();
try
{
await _BackgroundService.Execute(cancellationToken);
}
catch (TaskCanceledException)
{
}
catch (Exception ex)
{
_Logger.LogException(ex);
_Logger.LogError(
$"background service '{_TypeHelper.NameOf(_BackgroundService.GetType())}' threw an exception, terminating program");
// TODO: Still do this?
_ApplicationLifetimeManager.SignalGracefulTermination();
}
}
public async Task Execute(CancellationToken cancellationToken)
{
int restartCount = 0;
while (true)
{
try
{
if (restartCount > 0)
{
_Logger.LogDebug($"restart-attempt #{restartCount} for background service {_TypeHelper.NameOf(_DecoratedService.GetType())}");
}
await _DecoratedService.Execute(cancellationToken);
if (restartCount > 0)
{
_Logger.LogDebug($"background service {_TypeHelper.NameOf(_DecoratedService.GetType())} terminated normally");
}
return;
}
catch (TaskCanceledException)
{
throw;
}
catch (Exception ex)
{
_Logger.LogException(ex);
restartCount++;
TimeSpan restartDelay = GetRestartDelay(restartCount);
_Logger.LogVerbose(
$"background service {_TypeHelper.NameOf(_DecoratedService.GetType())} terminated due to an exception, restarting it in {restartDelay.Humanize()}");
await Task.Delay(restartDelay, cancellationToken).NotNull();
}
}
}