public void StatsEngineQueue_Is_Busy()
{
var dataTransportService = Mock.Create <IDataTransportService>();
var metricBuilder = WireModels.Utilities.GetSimpleMetricBuilder();
var outOfBandMetricSource = Mock.Create <IOutOfBandMetricSource>();
var agentHealthReporter = Mock.Create <IAgentHealthReporter>();
var dnsStatic = Mock.Create <IDnsStatic>();
var processStatic = Mock.Create <IProcessStatic>();
var scheduler = Mock.Create <IScheduler>();
Mock.Arrange(() => scheduler.ExecuteEvery(Arg.IsAny <Action>(), Arg.IsAny <TimeSpan>(), Arg.IsAny <TimeSpan?>()))
.DoInstead <Action, TimeSpan, TimeSpan?>((action, _, __) => _harvestAction = action);
_metricAggregator = new MetricAggregator(dataTransportService, metricBuilder, _metricNameService, new[] { outOfBandMetricSource }, processStatic, scheduler);
EventBus <AgentConnectedEvent> .Publish(new AgentConnectedEvent());
var sentMetrics = Enumerable.Empty <MetricWireModel>();
Mock.Arrange(() => dataTransportService.Send(Arg.IsAny <IEnumerable <MetricWireModel> >()))
.DoInstead <IEnumerable <MetricWireModel> >(metrics => sentMetrics = metrics);
var maxThreads = 25;
List <Thread> threads = new List <Thread>();
for (int i = 0; i < maxThreads; i++)
{
var test = new TestMetricWireModel();
test.CreateMetric(metricBuilder);
Thread thread = new Thread(() =>
{
_metricAggregator.Collect(test);
});
thread.IsBackground = true;
threads.Add(thread);
thread.Start();
}
for (int i = 0; i < maxThreads; i++)
{
threads[i].Join();
}
var queueCountBeforeHarvest = _metricAggregator.StatsEngineQueue.StatsEngineCount;
//Check if the queue got queued up when multiple threads use the queue.
if (queueCountBeforeHarvest == 1)
{
Assert.Inconclusive();
}
Assert.IsTrue(queueCountBeforeHarvest > 1);
_harvestAction();
var queueCountAfterHarvest = _metricAggregator.StatsEngineQueue.StatsEngineCount;
//Check if the queue is empty after harvest.
Assert.IsTrue(queueCountAfterHarvest == 0);
//Check the number of metrics being sent up.
Assert.IsTrue(sentMetrics.Count() == 3, "Count was " + sentMetrics.Count());
// there should be one supportability and two DotNet (one scoped and one unscoped)
string[] names = new string[] { "Supportability/MetricHarvest/transmit", "DotNet/test_metric" };
foreach (MetricWireModel current in sentMetrics)
{
Assert.IsTrue(names.Contains(current.MetricName.Name), "Name is not present: " + current.MetricName.Name);
}
}