/// <summary>
/// Creates a metric telemetry associated with the PerformanceCounterData, with the respective float value.
/// </summary>
/// <param name="pc">PerformanceCounterData for which we are generating the telemetry.</param>
/// <param name="value">The metric value for the respective performance counter data.</param>
/// <returns>Metric telemetry object associated with the specific counter.</returns>
private static MetricTelemetry CreateTelemetry(PerformanceCounterData pc, double value)
{
var metricName = !string.IsNullOrWhiteSpace(pc.ReportAs)
? pc.ReportAs
: string.Format(
CultureInfo.InvariantCulture,
"{0} - {1}",
pc.PerformanceCounter.CategoryName,
pc.PerformanceCounter.CounterName);
var metricTelemetry = new MetricTelemetry()
{
Name = metricName,
Count = 1,
Sum = value,
Min = value,
Max = value,
StandardDeviation = 0,
};
metricTelemetry.Properties.Add("CounterInstanceName", pc.PerformanceCounter.InstanceName);
metricTelemetry.Properties.Add("CustomPerfCounter", "true");
return(metricTelemetry);
}
/// <summary>
/// Register a performance counter for collection.
/// </summary>
/// <param name="originalString">Original string definition of the counter.</param>
/// <param name="reportAs">Alias to report the counter as.</param>
/// <param name="categoryName">Category name.</param>
/// <param name="counterName">Counter name.</param>
/// <param name="instanceName">Instance name.</param>
/// <param name="usesInstanceNamePlaceholder">Indicates whether the counter uses a placeholder in the instance name.</param>
private void RegisterPerformanceCounter(string originalString, string reportAs, string categoryName, string counterName, string instanceName, bool usesInstanceNamePlaceholder)
{
ICounterValue performanceCounter = null;
try
{
performanceCounter = CounterFactory.GetCounter(originalString, categoryName, counterName, instanceName);
}
catch (Exception e)
{
// we want to have another crack at it if instance placeholder is used,
// notably due to the fact that CLR process ID counter only starts returning values after the first garbage collection
if (!usesInstanceNamePlaceholder)
{
throw new InvalidOperationException(
string.Format(
CultureInfo.CurrentCulture,
"Failed to register performance counter. Category: {0}, counter: {1}, instance: {2}.",
categoryName,
counterName,
instanceName),
e);
}
}
bool firstReadOk = false;
try
{
// perform the first read. For many counters the first read will always return 0
// since a single sample is not enough to calculate a value
performanceCounter.Collect();
firstReadOk = true;
}
catch (Exception e)
{
throw new InvalidOperationException(
string.Format(
CultureInfo.CurrentCulture,
"Failed to perform the first read for performance counter. Please make sure it exists. Category: {0}, counter: {1}, instance {2}",
categoryName,
counterName,
instanceName),
e);
}
finally
{
PerformanceCounterData perfData = new PerformanceCounterData(
originalString,
reportAs,
usesInstanceNamePlaceholder,
!firstReadOk,
categoryName,
counterName,
instanceName);
this.performanceCounters.Add(new Tuple <PerformanceCounterData, ICounterValue>(perfData, performanceCounter));
}
}
/// <summary>
/// Rebinds performance counters to Windows resources.
/// </summary>
public void RefreshPerformanceCounter(PerformanceCounterData pcd)
{
Tuple <PerformanceCounterData, ICounterValue> tupleToRemove = this.performanceCounters.FirstOrDefault(t => t.Item1 == pcd);
if (tupleToRemove != null)
{
this.performanceCounters.Remove(tupleToRemove);
}
try
{
this.RegisterPerformanceCounter(
pcd.OriginalString,
pcd.ReportAs,
pcd.PerformanceCounter.CategoryName,
pcd.PerformanceCounter.CounterName,
pcd.PerformanceCounter.InstanceName,
pcd.UsesInstanceNamePlaceholder);
}
catch (InvalidOperationException e)
{
PerformanceCollectorEventSource.Log.CounterRegistrationFailedEvent(
e.Message,
PerformanceCounterUtility.FormatPerformanceCounter(pcd.PerformanceCounter));
}
}
private void RefreshCounter(
PerformanceCounterData pcd,
IEnumerable <string> win32Instances,
IEnumerable <string> clrInstances)
{
string dummy;
bool usesInstanceNamePlaceholder;
var pc = this.CreateCounter(
pcd.OriginalString,
win32Instances,
clrInstances,
out usesInstanceNamePlaceholder,
out dummy);
try
{
this.collector.RefreshPerformanceCounter(pcd, pc);
PerformanceCollectorEventSource.Log.CounterRegisteredEvent(
PerformanceCounterUtility.FormatPerformanceCounter(pc));
}
catch (InvalidOperationException e)
{
PerformanceCollectorEventSource.Log.CounterRegistrationFailedEvent(
e.Message,
PerformanceCounterUtility.FormatPerformanceCounter(pc));
}
}
/// <summary>
/// Create handler for performance counter telemetry.
/// </summary>
private Action <ITelemetry> CreateHandlerForPerformanceCounterTelemetry(EventSource eventSource, MethodInfo writeGenericMethod, Type eventSourceOptionsType, PropertyInfo eventSourceOptionsKeywordsProperty)
{
var eventSourceOptions = Activator.CreateInstance(eventSourceOptionsType);
var keywords = Keywords.PerformanceCounters;
eventSourceOptionsKeywordsProperty.SetValue(eventSourceOptions, keywords);
var dummyPerfData = new PerformanceCounterData();
var writeMethod = writeGenericMethod.MakeGenericMethod(new
{
PartA_iKey = this.dummyPartAiKeyValue,
PartA_Tags = this.dummyPartATagsValue,
PartB_PerformanceCounterData = new
{
// The properties and layout should be the same as PerformanceCounterData_types.cs
dummyPerfData.ver,
dummyPerfData.categoryName,
dummyPerfData.counterName,
dummyPerfData.instanceName,
dummyPerfData.kind,
dummyPerfData.count,
dummyPerfData.min,
dummyPerfData.max,
dummyPerfData.stdDev,
dummyPerfData.value,
dummyPerfData.properties
}
}.GetType());
return((item) =>
{
if (this.EventSourceInternal.IsEnabled(EventLevel.Verbose, keywords))
{
var telemetryItem = item as PerformanceCounterTelemetry;
var data = telemetryItem.Data;
var extendedData = new
{
// The properties and layout should be the same as the anonymous type in the above MakeGenericMethod
PartA_iKey = telemetryItem.Context.InstrumentationKey,
PartA_Tags = telemetryItem.Context.Tags,
PartB_PerformanceCounterData = new
{
data.ver,
data.categoryName,
data.counterName,
data.instanceName,
data.kind,
data.count,
data.min,
data.max,
data.stdDev,
data.value,
data.properties
}
};
writeMethod.Invoke(eventSource, new object[] { PerformanceCounterTelemetry.TelemetryName, eventSourceOptions, extendedData });
}
});
}
public ViewType(IPushData view, object[] viewParams, DataType dataType, PerformanceCounterData performanceCounterData, string instanceName)
{
this.view = view;
this.viewParams = viewParams;
this.dataType = dataType;
this.performanceCounterData = performanceCounterData;
this.instanceName = instanceName;
}
private void PercentCounterHandler(object o, EventArgs e)
{
PerformanceCounterData pcd = (PerformanceCounterData)o;
pcd.percent = pcd.performanceCounter[0].NextValue();
pcd.total = Convert.ToDouble(pcd.param[0]);
pcd.load = pcd.total * pcd.percent;
pcd.available = pcd.total - pcd.load;
}
private void CurrentLoadCounterHandler(object o, EventArgs e)
{
PerformanceCounterData pcd = (PerformanceCounterData)o;
pcd.percent = 100;
pcd.total = pcd.performanceCounter[0].NextValue();
pcd.load = pcd.total;
pcd.available = 0;
}
public void SetDataToView(DataType type, IPushData view, string instanceName = "_Total", object[] viewParams = null)
{
PerformanceCounterData pcd = this.CreatePercentCounterData(type, instanceName);
if (!this.views.ContainsKey(view))
{
this.views.Add(view, new List <ViewType>());
}
this.views[view].Add(new ViewType(view, viewParams, type, pcd, instanceName));
}
/// <summary>
/// Register a performance counter for collection.
/// </summary>
private void RegisterPerformanceCounter(string originalString, string reportAs, string categoryName, string counterName, string instanceName, bool usesInstanceNamePlaceholder, bool isCustomCounter)
{
ICounterValue counter = null;
try
{
counter = this.factory.GetCounter(originalString, reportAs);
}
catch
{
PerformanceCollectorEventSource.Log.CounterNotWebAppSupported(originalString);
return;
}
bool firstReadOk = false;
try
{
// perform the first read. For many counters the first read will always return 0
// since a single sample is not enough to calculate a value
var value = counter.GetValueAndReset();
firstReadOk = true;
}
catch (Exception e)
{
throw new InvalidOperationException(
string.Format(
CultureInfo.CurrentCulture,
"Failed to perform the first read for web app performance counter. Please make sure it exists. Counter: {0}",
counterName),
e);
}
finally
{
PerformanceCounterData perfData = new PerformanceCounterData(
originalString,
reportAs,
usesInstanceNamePlaceholder,
isCustomCounter,
!firstReadOk,
categoryName,
counterName,
instanceName);
this.performanceCounters.Add(new Tuple <PerformanceCounterData, ICounterValue>(perfData, counter));
}
}
/// <summary>
/// Rebinds performance counters to Windows resources.
/// </summary>
public void RefreshPerformanceCounter(PerformanceCounterData pcd)
{
Tuple <PerformanceCounterData, ICounterValue> tupleToRemove = this.performanceCounters.FirstOrDefault(t => t.Item1 == pcd);
if (tupleToRemove != null)
{
this.performanceCounters.Remove(tupleToRemove);
}
this.RegisterPerformanceCounter(
pcd.OriginalString,
pcd.ReportAs,
pcd.PerformanceCounter.CategoryName,
pcd.PerformanceCounter.CounterName,
pcd.PerformanceCounter.InstanceName,
pcd.UsesInstanceNamePlaceholder);
}
/// <summary>
/// Register a performance counter for collection.
/// </summary>
private void RegisterPerformanceCounter(string originalString, string reportAs, string categoryName, string counterName, string instanceName, bool usesInstanceNamePlaceholder, bool isCustomCounter)
{
ICounterValue counter = null;
try
{
counter = this.factory.GetCounter(originalString, reportAs);
}
catch
{
PerformanceCollectorEventSource.Log.CounterNotWebAppSupported(originalString);
return;
}
bool firstReadOk = false;
try
{
// perform the first read. For many counters the first read will always return 0
// since a single sample is not enough to calculate a value
var value = counter.GetValueAndReset();
firstReadOk = true;
}
catch (Exception e)
{
throw new InvalidOperationException(
string.Format(
CultureInfo.CurrentCulture,
Resources.WebAppPerformanceCounterFirstReadFailed,
counterName),
e);
}
finally
{
PerformanceCounterData perfData = new PerformanceCounterData(
originalString,
reportAs,
usesInstanceNamePlaceholder,
isCustomCounter,
!firstReadOk,
categoryName,
counterName,
instanceName);
this.performanceCounters.Add(new Tuple<PerformanceCounterData, ICounterValue>(perfData, counter));
}
}
/// <summary>
/// Rebinds performance counters to Windows resources.
/// </summary>
public void RefreshPerformanceCounter(PerformanceCounterData pcd)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="PerformanceCounterTelemetry"/> class.
/// </summary>
public PerformanceCounterTelemetry()
{
this.Data = new PerformanceCounterData();
this.context = new TelemetryContext(this.Data.properties);
}
private PerformanceCounterData CreatePercentCounterData(DataType type, string instanceName)
{
string key = type.ToString() + instanceName;
switch (type)
{
case DataType.ProcessorLoadPercent:
if (!this.performanceCounters.ContainsKey(key))
{
PerformanceCounterData pcd = new PerformanceCounterData(new PerformanceCounter[] { new PerformanceCounter("Processor", "% Processor Time", instanceName) }, type, GetDataType.Percent, instanceName, new object[] { 100 });
pcd.CountHandle += this.PercentCounterHandler;
this.performanceCounters.Add(key, pcd);
return(pcd);
}
return(this.performanceCounters[key]);
case DataType.MemoryLoadPercent:
if (!this.performanceCounters.ContainsKey(key))
{
PerformanceCounterData pcd = new PerformanceCounterData(new PerformanceCounter[] { new PerformanceCounter("Memory", "Available KBytes") }, type, GetDataType.Available, instanceName, new object[] { this.systemInfo.PhysicalMemorySize });
pcd.CountHandle += this.AvaiableCounterHandler;
this.performanceCounters.Add(key, pcd);
return(pcd);
}
return(this.performanceCounters[key]);
case DataType.LogicalDiskLoadPercent:
if (!this.performanceCounters.ContainsKey(key))
{
PerformanceCounterData pcd = new PerformanceCounterData(new PerformanceCounter[] { new PerformanceCounter("LogicalDisk", "Disk Bytes/sec", instanceName) }, type, GetDataType.Percent, instanceName, new object[] { 100 });
pcd.CountHandle += this.CurrentLoadCounterHandler;
this.performanceCounters.Add(key, pcd);
return(pcd);
}
return(this.performanceCounters[key]);
case DataType.LogicalDiskReadLoadPercent:
if (!this.performanceCounters.ContainsKey(key))
{
PerformanceCounterData pcd = new PerformanceCounterData(new PerformanceCounter[] { new PerformanceCounter("LogicalDisk", "Disk Read Bytes/sec", instanceName) }, type, GetDataType.Percent, instanceName, new object[] { 100 });
pcd.CountHandle += this.CurrentLoadCounterHandler;
this.performanceCounters.Add(key, pcd);
return(pcd);
}
return(this.performanceCounters[key]);
case DataType.LogicalDiskWriteLoadPercent:
if (!this.performanceCounters.ContainsKey(key))
{
PerformanceCounterData pcd = new PerformanceCounterData(new PerformanceCounter[] { new PerformanceCounter("LogicalDisk", "Disk Write Bytes/sec", instanceName) }, type, GetDataType.Percent, instanceName, new object[] { 100 });
pcd.CountHandle += this.CurrentLoadCounterHandler;
this.performanceCounters.Add(key, pcd);
return(pcd);
}
return(this.performanceCounters[key]);
case DataType.NetworkInterfaceLoadPercent:
if (!this.performanceCounters.ContainsKey(key))
{
PerformanceCounterData pcd = new PerformanceCounterData(new PerformanceCounter[] { new PerformanceCounter("Network Interface", "Bytes Total/sec", instanceName) }, type, GetDataType.Percent, instanceName, new object[] { 100 });
pcd.CountHandle += this.CurrentLoadCounterHandler;
this.performanceCounters.Add(key, pcd);
return(pcd);
}
return(this.performanceCounters[key]);
case DataType.NetworkInterfaceReceivedLoadPercent:
if (!this.performanceCounters.ContainsKey(key))
{
PerformanceCounterData pcd = new PerformanceCounterData(new PerformanceCounter[] { new PerformanceCounter("Network Interface", "Bytes Received/sec", instanceName) }, type, GetDataType.Percent, instanceName, new object[] { 100 });
pcd.CountHandle += this.CurrentLoadCounterHandler;
this.performanceCounters.Add(key, pcd);
return(pcd);
}
return(this.performanceCounters[key]);
case DataType.NetworkInterfaceSentLoadPercent:
if (!this.performanceCounters.ContainsKey(key))
{
PerformanceCounterData pcd = new PerformanceCounterData(new PerformanceCounter[] { new PerformanceCounter("Network Interface", "Bytes Sent/sec", instanceName) }, type, GetDataType.Percent, instanceName, new object[] { 100 });
pcd.CountHandle += this.CurrentLoadCounterHandler;
this.performanceCounters.Add(key, pcd);
return(pcd);
}
return(this.performanceCounters[key]);
default:
return(null);
}
}
private PerformanceCounterData CreatePercentCounterData(DataType type,string instanceName)
{
string key = type.ToString() + instanceName;
switch (type)
{
case DataType.ProcessorLoadPercent:
if (!this.performanceCounters.ContainsKey(key))
{
PerformanceCounterData pcd = new PerformanceCounterData(new PerformanceCounter[] { new PerformanceCounter("Processor", "% Processor Time", instanceName) }, type, GetDataType.Percent, instanceName,new object[] { 100 });
pcd.CountHandle += this.PercentCounterHandler;
this.performanceCounters.Add(key, pcd);
return pcd;
}
return this.performanceCounters[key];
case DataType.MemoryLoadPercent:
if (!this.performanceCounters.ContainsKey(key))
{
PerformanceCounterData pcd = new PerformanceCounterData(new PerformanceCounter[]{new PerformanceCounter("Memory", "Available KBytes")}, type,GetDataType.Available,instanceName,new object[]{this.systemInfo.PhysicalMemorySize});
pcd.CountHandle += this.AvaiableCounterHandler;
this.performanceCounters.Add(key, pcd);
return pcd;
}
return this.performanceCounters[key];
case DataType.LogicalDiskLoadPercent:
if (!this.performanceCounters.ContainsKey(key))
{
PerformanceCounterData pcd = new PerformanceCounterData(new PerformanceCounter[] { new PerformanceCounter("LogicalDisk", "Disk Bytes/sec", instanceName) }, type, GetDataType.Percent, instanceName, new object[] { 100 });
pcd.CountHandle += this.CurrentLoadCounterHandler;
this.performanceCounters.Add(key, pcd);
return pcd;
}
return this.performanceCounters[key];
case DataType.LogicalDiskReadLoadPercent:
if (!this.performanceCounters.ContainsKey(key))
{
PerformanceCounterData pcd = new PerformanceCounterData(new PerformanceCounter[] { new PerformanceCounter("LogicalDisk", "Disk Read Bytes/sec", instanceName) }, type, GetDataType.Percent, instanceName, new object[] { 100 });
pcd.CountHandle += this.CurrentLoadCounterHandler;
this.performanceCounters.Add(key, pcd);
return pcd;
}
return this.performanceCounters[key];
case DataType.LogicalDiskWriteLoadPercent:
if (!this.performanceCounters.ContainsKey(key))
{
PerformanceCounterData pcd = new PerformanceCounterData(new PerformanceCounter[] { new PerformanceCounter("LogicalDisk", "Disk Write Bytes/sec", instanceName) }, type, GetDataType.Percent, instanceName, new object[] { 100 });
pcd.CountHandle += this.CurrentLoadCounterHandler;
this.performanceCounters.Add(key, pcd);
return pcd;
}
return this.performanceCounters[key];
case DataType.NetworkInterfaceLoadPercent:
if (!this.performanceCounters.ContainsKey(key))
{
PerformanceCounterData pcd = new PerformanceCounterData(new PerformanceCounter[] { new PerformanceCounter("Network Interface", "Bytes Total/sec", instanceName) }, type, GetDataType.Percent, instanceName, new object[] { 100 });
pcd.CountHandle += this.CurrentLoadCounterHandler;
this.performanceCounters.Add(key, pcd);
return pcd;
}
return this.performanceCounters[key];
case DataType.NetworkInterfaceReceivedLoadPercent:
if (!this.performanceCounters.ContainsKey(key))
{
PerformanceCounterData pcd = new PerformanceCounterData(new PerformanceCounter[] { new PerformanceCounter("Network Interface", "Bytes Received/sec", instanceName) }, type, GetDataType.Percent, instanceName, new object[] { 100 });
pcd.CountHandle += this.CurrentLoadCounterHandler;
this.performanceCounters.Add(key, pcd);
return pcd;
}
return this.performanceCounters[key];
case DataType.NetworkInterfaceSentLoadPercent:
if (!this.performanceCounters.ContainsKey(key))
{
PerformanceCounterData pcd = new PerformanceCounterData(new PerformanceCounter[] { new PerformanceCounter("Network Interface", "Bytes Sent/sec", instanceName) }, type, GetDataType.Percent, instanceName, new object[] { 100 });
pcd.CountHandle += this.CurrentLoadCounterHandler;
this.performanceCounters.Add(key, pcd);
return pcd;
}
return this.performanceCounters[key];
default:
return null;
}
}
public ViewType(IPushData view, object[] viewParams, DataType dataType, PerformanceCounterData performanceCounterData, string instanceName)
{
this.view = view;
this.viewParams = viewParams;
this.dataType = dataType;
this.performanceCounterData = performanceCounterData;
this.instanceName = instanceName;
}
/// <summary>
/// Initializes a new instance of the <see cref="PerformanceCounterTelemetry"/> class.
/// </summary>
public PerformanceCounterTelemetry()
{
this.Data = new PerformanceCounterData();
}
/// <summary>
/// Rebinds performance counters to Windows resources.
/// </summary>
public void RefreshPerformanceCounter(PerformanceCounterData pcd)
{
Tuple<PerformanceCounterData, ICounterValue> tupleToRemove = this.performanceCounters.FirstOrDefault(t => t.Item1 == pcd);
if (tupleToRemove != null)
{
this.performanceCounters.Remove(tupleToRemove);
}
this.RegisterPerformanceCounter(
pcd.OriginalString,
pcd.ReportAs,
pcd.CategoryName,
pcd.CounterName,
pcd.InstanceName,
pcd.UsesInstanceNamePlaceholder,
pcd.IsCustomCounter);
}
/// <summary>
/// Register a performance counter for collection.
/// </summary>
/// <param name="originalString">Original string definition of the counter.</param>
/// <param name="reportAs">Alias to report the counter as.</param>
/// <param name="categoryName">Category name.</param>
/// <param name="counterName">Counter name.</param>
/// <param name="instanceName">Instance name.</param>
/// <param name="usesInstanceNamePlaceholder">Indicates whether the counter uses a placeholder in the instance name.</param>
/// <param name="isCustomCounter">Indicates whether the counter is a custom counter.</param>
private void RegisterPerformanceCounter(string originalString, string reportAs, string categoryName, string counterName, string instanceName, bool usesInstanceNamePlaceholder, bool isCustomCounter)
{
PerformanceCounter performanceCounter = null;
try
{
performanceCounter = new PerformanceCounter(categoryName, counterName, instanceName, true);
}
catch (Exception e)
{
// we want to have another crack at it if instance placeholder is used,
// notably due to the fact that CLR process ID counter only starts returning values after the first garbage collection
if (!usesInstanceNamePlaceholder)
{
throw new InvalidOperationException(
string.Format(
CultureInfo.CurrentCulture,
Resources.PerformanceCounterRegistrationFailed,
categoryName,
counterName,
instanceName),
e);
}
}
bool firstReadOk = false;
try
{
// perform the first read. For many counters the first read will always return 0
// since a single sample is not enough to calculate a value
performanceCounter.NextValue();
firstReadOk = true;
}
catch (Exception e)
{
throw new InvalidOperationException(
string.Format(
CultureInfo.CurrentCulture,
Resources.PerformanceCounterFirstReadFailed,
categoryName,
counterName,
instanceName),
e);
}
finally
{
PerformanceCounterData perfData = new PerformanceCounterData(
originalString,
reportAs,
usesInstanceNamePlaceholder,
isCustomCounter,
!firstReadOk,
categoryName,
counterName,
instanceName);
this.performanceCounters.Add(new Tuple<PerformanceCounterData, PerformanceCounter>(perfData, performanceCounter));
}
}
/// <summary>
/// Refreshes the counter associated with a specific performance counter data.
/// </summary>
/// <param name="pcd">Target performance counter data to refresh.</param>
private void RefreshCounter(PerformanceCounterData pcd)
{
string dummy;
bool usesInstanceNamePlaceholder;
var pc = PerformanceCounterUtility.CreateAndValidateCounter(
pcd.OriginalString,
this.win32Instances,
this.clrInstances,
out usesInstanceNamePlaceholder,
out dummy);
try
{
this.RefreshPerformanceCounter(pcd);
PerformanceCollectorEventSource.Log.CounterRegisteredEvent(
PerformanceCounterUtility.FormatPerformanceCounter(pc));
}
catch (InvalidOperationException e)
{
PerformanceCollectorEventSource.Log.CounterRegistrationFailedEvent(
e.Message,
PerformanceCounterUtility.FormatPerformanceCounter(pc));
}
}
public PerformanceCounterTelemetry()
{
Data = new PerformanceCounterData();
}
/// <summary>
/// Register a performance counter for collection.
/// </summary>
/// <param name="originalString">Original string definition of the counter.</param>
/// <param name="reportAs">Alias to report the counter as.</param>
/// <param name="categoryName">Category name.</param>
/// <param name="counterName">Counter name.</param>
/// <param name="instanceName">Instance name.</param>
/// <param name="usesInstanceNamePlaceholder">Indicates whether the counter uses a placeholder in the instance name.</param>
/// <param name="isCustomCounter">Indicates whether the counter is a custom counter.</param>
private void RegisterPerformanceCounter(string originalString, string reportAs, string categoryName, string counterName, string instanceName, bool usesInstanceNamePlaceholder, bool isCustomCounter)
{
PerformanceCounter performanceCounter = null;
try
{
performanceCounter = new PerformanceCounter(categoryName, counterName, instanceName, true);
}
catch (Exception e)
{
// we want to have another crack at it if instance placeholder is used,
// notably due to the fact that CLR process ID counter only starts returning values after the first garbage collection
if (!usesInstanceNamePlaceholder)
{
throw new InvalidOperationException(
string.Format(
CultureInfo.CurrentCulture,
Resources.PerformanceCounterRegistrationFailed,
categoryName,
counterName,
instanceName),
e);
}
}
bool firstReadOk = false;
try
{
// perform the first read. For many counters the first read will always return 0
// since a single sample is not enough to calculate a value
performanceCounter.NextValue();
firstReadOk = true;
}
catch (Exception e)
{
throw new InvalidOperationException(
string.Format(
CultureInfo.CurrentCulture,
Resources.PerformanceCounterFirstReadFailed,
categoryName,
counterName,
instanceName),
e);
}
finally
{
PerformanceCounterData perfData = new PerformanceCounterData(
originalString,
reportAs,
usesInstanceNamePlaceholder,
isCustomCounter,
!firstReadOk,
categoryName,
counterName,
instanceName);
this.performanceCounters.Add(new Tuple <PerformanceCounterData, PerformanceCounter>(perfData, performanceCounter));
}
}
/// <summary>
/// Initializes a new instance of the <see cref="PerformanceCounterTelemetry"/> class.
/// </summary>
public PerformanceCounterTelemetry()
{
this.Data = new PerformanceCounterData();
this.context = new TelemetryContext(this.Data.properties);
}