/// <summary>
/// Performs collection for all registered counters.
/// </summary>
/// <param name="onReadingFailure">Invoked when an individual counter fails to be read.</param>
public IEnumerable <Tuple <PerformanceCounterData, float> > Collect(
Action <string, Exception> onReadingFailure = null)
{
return(this.performanceCounters.Where(pc => !pc.IsInBadState).SelectMany(
pc =>
{
float value;
try
{
value = CollectCounter(pc.PerformanceCounter);
}
catch (InvalidOperationException e)
{
if (onReadingFailure != null)
{
onReadingFailure(
PerformanceCounterUtility.FormatPerformanceCounter(pc.PerformanceCounter),
e);
}
return new Tuple <PerformanceCounterData, float>[] { };
}
return new[] { Tuple.Create(pc, value) };
}));
}
/// <summary>
/// Validates the counter by parsing.
/// </summary>
/// <param name="perfCounterName">Performance counter name to validate.</param>
/// <param name="win32Instances">Windows 32 instances.</param>
/// <param name="clrInstances">CLR instances.</param>
/// <param name="usesInstanceNamePlaceholder">Boolean to check if it is using an instance name place holder.</param>
/// <param name="error">Error message.</param>
/// <returns>Performance counter.</returns>
public static PerformanceCounter CreateAndValidateCounter(
string perfCounterName,
IEnumerable <string> win32Instances,
IEnumerable <string> clrInstances,
out bool usesInstanceNamePlaceholder,
out string error)
{
error = null;
try
{
return(PerformanceCounterUtility.ParsePerformanceCounter(
perfCounterName,
win32Instances,
clrInstances,
out usesInstanceNamePlaceholder));
}
catch (Exception e)
{
usesInstanceNamePlaceholder = false;
PerformanceCollectorEventSource.Log.CounterParsingFailedEvent(e.Message, perfCounterName);
error = e.Message;
return(null);
}
}
public static IPerformanceCollector GetPerformanceCollector()
{
IPerformanceCollector collector;
if (PerformanceCounterUtility.IsWebAppRunningInAzure())
{
if (PerformanceCounterUtility.IsWindows)
{
// WebApp For windows
collector = (IPerformanceCollector) new WebAppPerformanceCollector();
PerformanceCollectorEventSource.Log.InitializedWithCollector(collector.GetType().Name);
}
else
{
// We are in WebApp, but not Windows. Use XPlatformPerfCollector.
collector = (IPerformanceCollector) new PerformanceCollectorXPlatform();
PerformanceCollectorEventSource.Log.InitializedWithCollector(collector.GetType().Name);
}
}
else if (PerformanceCounterUtility.IsWindows)
{
// The original Windows PerformanceCounter collector which is also
// supported in NetStandard2.0 in Windows.
collector = (IPerformanceCollector) new StandardPerformanceCollector();
PerformanceCollectorEventSource.Log.InitializedWithCollector(collector.GetType().Name);
}
else
{
// This is NetStandard2.0 and non-windows. Use XPlatformPerfCollector
collector = (IPerformanceCollector) new PerformanceCollectorXPlatform();
PerformanceCollectorEventSource.Log.InitializedWithCollector(collector.GetType().Name);
}
return(collector);
}
/// <summary>
/// Collects a value for a single counter.
/// </summary>
private static float CollectCounter(PerformanceCounter pc)
{
try
{
return(pc.NextValue());
}
catch (Exception e)
{
throw new InvalidOperationException(
string.Format(
CultureInfo.CurrentCulture,
Resources.PerformanceCounterReadFailed,
PerformanceCounterUtility.FormatPerformanceCounter(pc)),
e);
}
}
public static IPerformanceCollector GetPerformanceCollector()
{
IPerformanceCollector collector;
if (PerformanceCounterUtility.IsWebAppRunningInAzure())
{
collector = (IPerformanceCollector) new WebAppPerfCollector.WebAppPerformanceCollector();
PerformanceCollectorEventSource.Log.InitializedWithCollector(collector.GetType().Name);
}
else
{
collector = (IPerformanceCollector) new StandardPerformanceCollector();
PerformanceCollectorEventSource.Log.InitializedWithCollector(collector.GetType().Name);
}
return(collector);
}
public static IPerformanceCollector GetPerformanceCollector()
{
IPerformanceCollector collector;
// NetStandard1.6 has perf counter only on web apps.
if (PerformanceCounterUtility.IsWebAppRunningInAzure())
{
collector = (IPerformanceCollector) new WebAppPerformanceCollector();
PerformanceCollectorEventSource.Log.InitializedWithCollector(collector.GetType().Name);
}
else
{
// This will be the Stub collector which won't do anything.
collector = (IPerformanceCollector) new StandardPerformanceCollectorStub();
PerformanceCollectorEventSource.Log.InitializedWithCollector(collector.GetType().Name);
}
return(collector);
}