private static IObservable <Counters> CreatePerformanceCountersAsync()
{
return(Observable.Create <Counters>(x =>
{
var disposable = new CompositeDisposable();
try
{
var processName = GetProcessInstanceName();
Logger.Info(
"Creating performance counter 'Working Set'");
var workingSetCounter =
new PerformanceCounter("Process",
"Working Set", processName);
disposable.Add(workingSetCounter);
Logger.Info(
"Creating performance counter '% Processor Time'");
var cpuCounter =
new PerformanceCounter("Process",
"% Processor Time", processName);
disposable.Add(cpuCounter);
using (
Duration.Measure(Logger,
"Initialising performance counters (after creation)")
)
{
workingSetCounter.NextValue();
cpuCounter.NextValue();
}
x.OnNext(new Counters(workingSetCounter,
cpuCounter));
Logger.Info("Ready");
}
catch (ArgumentException exn)
{
LogFailToCreatePerformanceCounter(x, exn);
}
catch (InvalidOperationException exn)
{
LogFailToCreatePerformanceCounter(x, exn);
}
catch (Win32Exception exn)
{
LogFailToCreatePerformanceCounter(x, exn);
}
catch (PlatformNotSupportedException exn)
{
LogFailToCreatePerformanceCounter(x, exn);
}
catch (UnauthorizedAccessException exn)
{
LogFailToCreatePerformanceCounter(x, exn);
}
return disposable;
}));
}
