public override void Sample()
{
if (_listener == null)
{
return;
}
try
{
_threadPoolProxy.GetMaxThreads(out int countWorkerThreadsMax, out int countCompletionThreadsMax);
_threadPoolProxy.GetAvailableThreads(out int countWorkerThreadsAvail, out int countCompletionThreadsAvail);
var stats = new ThreadpoolUsageStatsSample(countWorkerThreadsMax, countWorkerThreadsAvail, countCompletionThreadsMax, countCompletionThreadsAvail);
_transformer.Transform(stats);
var sample = _listener.Sample();
_transformer.Transform(sample);
}
catch (Exception ex)
{
Log.Error($"Unable to get Threadpool stats sample. No .Net Threadpool metrics will be reported. Error : {ex}");
Stop();
}
}
public void TransformSample_ThreadpoolUsageStats_CreatesCorrectMetricValues()
{
const int countWorkerThreadsRemaining = 83;
const int countWorkerThreadsInUse = 17;
const int countCompletionThreadsRemaining = 180;
const int countCompletionThreadsInUse = 20;
var generatedMetrics = new Dictionary <string, MetricDataWireModel>();
Mock.Arrange(() => _metricAggregator
.Collect(Arg.IsAny <MetricWireModel>()))
.DoInstead <MetricWireModel>(m => generatedMetrics.Add(m.MetricName.Name, m.Data));
var sample = new ThreadpoolUsageStatsSample(countWorkerThreadsRemaining + countWorkerThreadsInUse, countWorkerThreadsRemaining, countCompletionThreadsRemaining + countCompletionThreadsInUse, countCompletionThreadsRemaining);
_threadStatsTransformer.Transform(sample);
NrAssert.Multiple(
() => Assert.AreEqual(4, generatedMetrics.Count),
() => MetricTestHelpers.CompareMetric(generatedMetrics, MetricNames.GetThreadpoolUsageStatsName(ThreadType.Worker, ThreadStatus.InUse), countWorkerThreadsInUse),
() => MetricTestHelpers.CompareMetric(generatedMetrics, MetricNames.GetThreadpoolUsageStatsName(ThreadType.Worker, ThreadStatus.Available), countWorkerThreadsRemaining),
() => MetricTestHelpers.CompareMetric(generatedMetrics, MetricNames.GetThreadpoolUsageStatsName(ThreadType.Completion, ThreadStatus.InUse), countCompletionThreadsInUse),
() => MetricTestHelpers.CompareMetric(generatedMetrics, MetricNames.GetThreadpoolUsageStatsName(ThreadType.Completion, ThreadStatus.Available), countCompletionThreadsRemaining)
);
}
public void threadpool_usage_sample_generated_on_sample()
{
// Arrange
var threadpoolUsageStatsSample = null as ThreadpoolUsageStatsSample;
Mock.Arrange(() => _threadStatsSampleTransformer.Transform(Arg.IsAny <ThreadpoolUsageStatsSample>()))
.DoInstead <ThreadpoolUsageStatsSample>(sample => threadpoolUsageStatsSample = sample);
// Act
_sampleAction();
// Assert
Assert.NotNull(threadpoolUsageStatsSample);
}