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/* =========================================================================================
* Copyright © 2013-2017 the kamon project <http://kamon.io/>
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the
* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language governing permissions
* and limitations under the License.
* =========================================================================================
*/
package kamon.trace
import kamon.Kamon.buildSpan
import kamon.testkit.{MetricInspection, Reconfigure}
import org.scalatest.{Matchers, WordSpecLike}
class SpanMetrics extends WordSpecLike with Matchers with MetricInspection with Reconfigure {
sampleAlways()
"Span Metrics" should {
"be recorded for successful execution" in {
val operation = "span-success"
val operationTag = "operation" -> operation
buildSpan(operation)
.start()
.finish()
val histogram = Span.Metrics.ProcessingTime.refine(Map(operationTag, noErrorTag))
histogram.distribution().count shouldBe 1
val errorHistogram = Span.Metrics.ProcessingTime.refine(Map(operationTag, errorTag))
errorHistogram.distribution().count shouldBe 0
}
"record correctly error latency and count" in {
val operation = "span-failure"
val operationTag = "operation" -> operation
buildSpan(operation)
.start()
.addTag("error", true)
.finish()
val histogram = Span.Metrics.ProcessingTime.refine(Map(operationTag, noErrorTag))
histogram.distribution().count shouldBe 0
val errorHistogram = Span.Metrics.ProcessingTime.refine(Map(operationTag, errorTag))
errorHistogram.distribution().count shouldBe 1
}
"add a parentOperation tag to the metrics if span metrics scoping is enabled" in {
val parent = buildSpan("parent").start()
val parentOperationTag = "parentOperation" -> "parent"
val operation = "span-with-parent"
val operationTag = "operation" -> operation
buildSpan(operation)
.asChildOf(parent)
.start()
.addTag("error", false)
.finish()
buildSpan(operation)
.asChildOf(parent)
.start()
.addTag("error", true)
.finish()
val histogram = Span.Metrics.ProcessingTime.refine(Map(operationTag, noErrorTag, parentOperationTag))
histogram.distribution().count shouldBe 1
val errorHistogram = Span.Metrics.ProcessingTime.refine(Map(operationTag, errorTag, parentOperationTag))
errorHistogram.distribution().count shouldBe 1
}
"not add any parentOperation tag to the metrics if span metrics scoping is disabled" in withoutSpanScopingEnabled {
val parent = buildSpan("parent").start()
val parentOperationTag = "parentOperation" -> "parent"
val operation = "span-with-parent"
val operationTag = "operation" -> operation
buildSpan(operation)
.asChildOf(parent)
.start()
.addTag("error", false)
.finish()
buildSpan(operation)
.asChildOf(parent)
.start()
.addTag("error", true)
.finish()
val histogram = Span.Metrics.ProcessingTime.refine(Map(operationTag, noErrorTag, parentOperationTag))
histogram.distribution().count shouldBe 0
val errorHistogram = Span.Metrics.ProcessingTime.refine(Map(operationTag, errorTag, parentOperationTag))
errorHistogram.distribution().count shouldBe 0
}
}
val errorTag = "error" -> "true"
val noErrorTag = "error" -> "false"
private def withoutSpanScopingEnabled[T](f: => T): T = {
disableSpanMetricScoping()
val evaluated = f
enableSpanMetricScoping()
evaluated
}
}
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