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package kamon
import com.typesafe.config.Config
import kamon.metric.PeriodSnapshot
import kamon.testkit.Reconfigure
import org.scalatest.concurrent.Eventually
import org.scalatest.{BeforeAndAfterAll, Matchers, WordSpec}
class ReporterRegistrySpec extends WordSpec with Matchers with Reconfigure with Eventually with BeforeAndAfterAll {
"The ReporterRegistry" when {
"working with metrics reporters" should {
"report all metrics if no filters are applied" in {
Kamon.counter("test.hello").increment()
Kamon.counter("test.world").increment()
Kamon.counter("other.hello").increment()
val reporter = new SeenMetricsReporter()
val subscription = Kamon.addReporter(reporter, "reporter-registry-spec")
eventually {
reporter.snapshotCount() should be >= 1
reporter.metrics() should contain allOf(
"test.hello",
"test.world",
"other.hello"
)
}
subscription.cancel()
}
"default to deny all metrics if a provided filter name doesn't exist" in {
Kamon.counter("test.hello").increment()
Kamon.counter("test.world").increment()
Kamon.counter("other.hello").increment()
val reporter = new SeenMetricsReporter()
val subscription = Kamon.addReporter(reporter, "reporter-registry-spec", "does-not-exist")
eventually {
reporter.snapshotCount() should be >= 1
reporter.metrics() shouldBe empty
}
subscription.cancel()
}
"apply existent filters" in {
Kamon.counter("test.hello").increment()
Kamon.counter("test.world").increment()
Kamon.counter("other.hello").increment()
val reporter = new SeenMetricsReporter()
val subscription = Kamon.addReporter(reporter, "reporter-registry-spec", "real-filter")
eventually {
reporter.snapshotCount() should be >= 1
reporter.metrics() should contain allOf(
"test.hello",
"test.world"
)
}
subscription.cancel()
}
}
}
override protected def beforeAll(): Unit = {
applyConfig(
"""
|kamon {
| metric.tick-interval = 10 millis
|
| util.filters {
| real-filter {
| includes = [ "test**" ]
| }
| }
|}
|
""".stripMargin
)
}
override protected def afterAll(): Unit = {
resetConfig()
}
abstract class DummyReporter extends MetricReporter {
override def start(): Unit = {}
override def stop(): Unit = {}
override def reconfigure(config: Config): Unit = {}
}
class SeenMetricsReporter extends DummyReporter {
@volatile private var count = 0
@volatile private var seenMetrics = Seq.empty[String]
override def reportPeriodSnapshot(snapshot: PeriodSnapshot): Unit = {
import snapshot.metrics._
count += 1
seenMetrics = counters.map(_.name) ++ histograms.map(_.name) ++ gauges.map(_.name) ++ rangeSamplers.map(_.name)
}
def metrics(): Seq[String] =
seenMetrics
def snapshotCount(): Int =
count
}
}
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