/// <summary>
/// Calculates average performance counters.
/// </summary>
/// <param name="metricName">
/// Metric name it will be passed to Sentinel
/// </param>
/// <param name="table">
/// metric table
/// </param>
/// <param name="moduleName">
/// The key part 1. Module name + the name of metric that is collected
/// </param>
/// <param name="counterName">
/// The key part 2. Module name + the name of metric that is collected
/// </param>
/// <param name="collectedSample">
/// performance counter sample
/// </param>
/// <param name="logger">
/// Logger object
/// </param>
private void UpdateCounterSamples(string metricName, Dictionary <string, string> table, string moduleName, string counterName, PerfCounterSampleHolder collectedSample, ILog logger)
{
// As a key for CounterSamples dictionary combination of module name and metric name will be used
// (for cases different modules - the same metric name)
if (!this.counterSamples.ContainsKey(moduleName + "_" + metricName))
{
// checking whether it is first sample
logger.DebugFormat("Adding first sample of {0}", moduleName + "_" + counterName);
this.counterSamples.Add(moduleName + "_" + metricName, collectedSample); // holds last sample of relevant perf counter
}
else
{
logger.DebugFormat("We already have sample for {0}", moduleName + "_" + metricName);
PerfCounterSampleHolder currentSample = this.counterSamples[moduleName + "_" + metricName]; // the smaple was collected and previous polling
DateTime checkTime = currentSample.CollectingTime.AddSeconds(currentSample.Interval); // adding collecting period
if (checkTime < collectedSample.CollectingTime)
{
// checking if it is time to culculate the value of average perf counter
logger.Debug("It is time to calculate the new perf. counter value.");
if (currentSample.Sample.TimeStamp100nSec == collectedSample.Sample.TimeStamp100nSec)
{
// checking if not the same sample
logger.Debug("The sample is the same");
currentSample.TryToWaitDelta(); // waiting delta
this.UpdateMetricTableWithExistingValueOrNA(metricName, table, logger);
return;
}
if (!table.ContainsKey(metricName))
{
if (!this.averageValues.ContainsKey(metricName))
{
this.averageValues.Add(metricName, CounterSample.Calculate(currentSample.Sample, collectedSample.Sample).ToString(CultureInfo.InvariantCulture)); // add value
}
else
{
this.averageValues[metricName] =
CounterSample.Calculate(currentSample.Sample, collectedSample.Sample).ToString(CultureInfo.InvariantCulture); // update value
}
logger.DebugFormat("Updating value of counter {0} with new one: {1}", metricName, this.averageValues[metricName]);
table.Add(metricName, this.averageValues[metricName]); // add value to resulted table
collectedSample.CollectingTime = checkTime; // update time
logger.Debug("Updating sample");
this.counterSamples[moduleName + "_" + metricName] = collectedSample; // update sample
}
}
}
this.UpdateMetricTableWithExistingValueOrNA(metricName, table, logger);
}
/// <summary>
/// The get the performance counter value.
/// </summary>
/// <param name="moduleName">
/// Module Name
/// </param>
/// <param name="metricName">
/// The metric name.
/// </param>
/// <param name="metric">
/// The metric.
/// </param>
/// <param name="instanceName">
/// The instance Name.
/// </param>
/// <param name="category">
/// Category name
/// </param>
/// <param name="metricTable">
/// The metric table.
/// </param>
/// <param name="logger">
/// The logger.
/// </param>
private void GetThePerfCounterValue(string moduleName, string metricName, MetricInfo metric, string instanceName, PerformanceCounterCategory category, Dictionary <string, string> metricTable, ILog logger)
{
try
{
if (metric.CounterType.Equals("Average"))
{
// checking if it is perfcounter of average type
logger.DebugFormat("Performace counter {0} - {1} is average", category.CategoryName, metric.CounterName);
var val = this.performanceCounterWrapper.GetPerfCounterNextSample(category, metric.CounterName, instanceName, logger);
if (val != null)
{
// creating sample holder for perf counter
var holder = new PerfCounterSampleHolder((CounterSample)val, metric.CollectingInterval, metric.Delta);
// calculating the value of avarage perf counter
this.UpdateCounterSamples(metricName, metricTable, moduleName, metric.CounterName, holder, logger);
}
}
else
{
// it is simple perfcounter
logger.DebugFormat("Performace counter {0} - {1} is simple. Getting it's value", category.CategoryName, metric.CounterName);
var val = this.performanceCounterWrapper.GetPerfCounterValue(category, metric.CounterName, instanceName, logger);
if (val != null)
{
if (!metricTable.ContainsKey(metricName))
{
metricTable.Add(metricName, ((float)val).ToString(CultureInfo.InvariantCulture)); // adding the value to resulted table
}
}
}
}
catch (Exception exception)
{
logger.ErrorFormat("Error occured while trying to performance counter {0} status", metricName);
logger.Error(exception);
}
if (!metricTable.ContainsKey(metricName))
{
logger.ErrorFormat("Error occured while trying to collect metric {0} state", metricName);
//metricTable.Add(metricName, SNMPAgentConstants.FAILED_TO_COLLECT_STATE); // adding the value to resulted table
}
}
