protected override void Run(CancellationToken token)
{
using (var watcher = new FileWatcher(File.FullName))
{
Configuration = GetConfiguration();
var observable = Observable.FromEventPattern(
handler => watcher.Changed += handler,
handler => watcher.Changed -= handler
)
.Throttle(TimeSpan.FromMilliseconds(200))
.Subscribe(e =>
{
Debug.WriteLine("Configuration file changed");
HandleUpdate();
});
watcher.Removed += (sender, e) =>
{
Debug.WriteLine("Configuration file removed");
Service.Shutdown();
};
//wait until cancelled
token.WaitHandle.WaitOne();
Debug.WriteLine("Shutting down configuration watcher");
observable.Dispose();
}
}
private void Wrap(CancellationToken token)
{
try
{
Debug.WriteLine("Attempting to run worker...");
Run(token);
Debug.WriteLine("Running worker finished normally...");
}
//catch operation cancellation
catch (AggregateException exception)
when(exception.InnerException is OperationCanceledException)
{
Debug.WriteLine("Worker cancelled");
}
//catch operation cancellation
catch (OperationCanceledException)
{
Debug.WriteLine("Worker cancelled");
}
//catch aggregate exception
catch (AggregateException exception)
{
Debug.WriteLine("Uncaught worker exceptions:");
foreach (var innerException in exception.Flatten().InnerExceptions)
{
Debug.WriteLine(innerException.Message);
}
Service.Shutdown();
}
//catch unhandled exceptions
catch (Exception exception)
{
Debug.WriteLine("Uncaught worker exception: `{0}`", exception.Message);
Service.Shutdown();
}
Debug.WriteLine("Running worker finished...");
Stop();
}