/// <summary>
/// Initializes a new instance of the <see cref="PerformanceCounterManager" /> class.
/// </summary>
/// <param name="categoryInfo">The category information.</param>
/// <param name="counterDefinitions">The counter definitions.</param>
protected PerformanceCounterManager(PerformanceCounterCategoryInfo categoryInfo, CounterCreationData[] counterDefinitions)
{
var category = GetOrCreateCounterCategory(categoryInfo, counterDefinitions);
foreach (var counter in category.GetCounters())
{
counter.ReadOnly = false;
_counterMap.Add(counter.CounterName, new SafePerformanceCounter(counter));
}
}
/// <summary>
/// Gets the or create counter category.
/// </summary>
/// <param name="categoryInfo">The category information.</param>
/// <param name="counters">The counters.</param>
/// <returns>PerformanceCounterCategory.</returns>
private static PerformanceCounterCategory GetOrCreateCounterCategory(
PerformanceCounterCategoryInfo categoryInfo, CounterCreationData[] counters)
{
var creationPending = true;
var categoryExists = false;
var categoryName = categoryInfo.CategoryName;
var counterNames = new HashSet <string>(counters.Select(info => info.CounterName));
PerformanceCounterCategory category = null;
if (PerformanceCounterCategory.Exists(categoryName))
{
categoryExists = true;
category = new PerformanceCounterCategory(categoryName);
var counterList = category.GetCounters();
if (category.CategoryType == categoryInfo.CategoryType && counterList.Length == counterNames.Count)
{
creationPending = counterList.Any(x => !counterNames.Contains(x.CounterName));
}
}
if (!creationPending)
{
return(category);
}
if (categoryExists)
{
PerformanceCounterCategory.Delete(categoryName);
}
var counterCollection = new CounterCreationDataCollection(counters);
category = PerformanceCounterCategory.Create(
categoryInfo.CategoryName,
categoryInfo.CategoryHelp,
categoryInfo.CategoryType,
counterCollection);
return(category);
}