public async Task Track_ActiveMessages_And_DeadLetteredMessages_Metrics_Per_Subscription(int numSubscriptions)
{
// arrange
var random = new Random();
var subscriptions = Enumerable.Range(0, numSubscriptions)
.Select(n => _servicebusNamespaceServiceStub.SetupSubscription(
$"topic{n}",
$"subscription{n}",
random.Next(),
random.Next()))
.ToList();
// act
await _metricsCollector.Run(null, NullLogger.Instance);
// assert
foreach (var subscription in subscriptions)
{
_telemetryChannelMock.Verify(
c => c.Send(It.Is <MetricTelemetry>(
m => m.Name == TrackedMetrics.ActiveMessages &&
m.Properties[nameof(subscription.EntityName)] == subscription.EntityName &&
m.Sum == subscription.ActiveMessagesCount)), Times.Once);
_telemetryChannelMock.Verify(
c => c.Send(It.Is <MetricTelemetry>(
m => m.Name == TrackedMetrics.DeadLetteredMessages &&
m.Properties[nameof(subscription.EntityName)] == subscription.EntityName &&
m.Sum == subscription.DeadLetteredMessagesCount)), Times.Once);
}
_telemetryChannelMock.Verify(m => m.Flush(), Times.Once);
}
static async Task Main(string[] args)
{
var config = await Parsing.Parsing.Config.LoadConfig(Parsing.Parsing.Config.DefaultConfigFilename);
var collector = new MetricsCollector(statusUpdater:
update => System.Console.WriteLine(update)
);
await collector.Run(config);
System.Console.WriteLine("Metrics collection complete.");
}