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Diffstat (limited to 'kamon-newrelic/src/main/scala/kamon/newrelic/WebTransactionMetricExtractor.scala')
-rw-r--r-- | kamon-newrelic/src/main/scala/kamon/newrelic/WebTransactionMetricExtractor.scala | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/kamon-newrelic/src/main/scala/kamon/newrelic/WebTransactionMetricExtractor.scala b/kamon-newrelic/src/main/scala/kamon/newrelic/WebTransactionMetricExtractor.scala new file mode 100644 index 00000000..cfb0e721 --- /dev/null +++ b/kamon-newrelic/src/main/scala/kamon/newrelic/WebTransactionMetricExtractor.scala @@ -0,0 +1,81 @@ +/* + * ========================================================================================= + * Copyright © 2013 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.newrelic + +import kamon.metric._ +import kamon.metric.TraceMetrics.ElapsedTime +import kamon.metric.instrument.Histogram +import kamon.trace.SegmentMetricIdentityLabel.HttpClient +import kamon.trace.SegmentMetricIdentity + +object WebTransactionMetricExtractor extends MetricExtractor { + + def extract(settings: Agent.Settings, collectionContext: CollectionContext, metrics: Map[MetricGroupIdentity, MetricGroupSnapshot]): Map[MetricID, MetricData] = { + val apdexBuilder = new ApdexBuilder("Apdex", None, settings.apdexT) + + // Trace metrics are recorded in nanoseconds. + var accumulatedHttpDispatcher: Histogram.Snapshot = Histogram.Snapshot.empty(Scale.Nano) + var accumulatedExternalServices: Histogram.Snapshot = Histogram.Snapshot.empty(Scale.Nano) + + val transactionMetrics = metrics.collect { + case (TraceMetrics(name), groupSnapshot) ⇒ + + groupSnapshot.metrics collect { + // Extract WebTransaction metrics and accumulate HttpDispatcher + case (ElapsedTime, snapshot: Histogram.Snapshot) ⇒ + accumulatedHttpDispatcher = accumulatedHttpDispatcher.merge(snapshot, collectionContext) + snapshot.recordsIterator.foreach { record ⇒ + apdexBuilder.record(Scale.convert(snapshot.scale, Scale.Unit, record.level), record.count) + } + + Metric.fromKamonMetricSnapshot(snapshot, s"WebTransaction/Custom/$name", None, Scale.Unit) + + // Extract all external services. + case (SegmentMetricIdentity(segmentName, label), snapshot: Histogram.Snapshot) if label.equals(HttpClient)⇒ + accumulatedExternalServices = accumulatedExternalServices.merge(snapshot, collectionContext) + + Metric.fromKamonMetricSnapshot(snapshot, s"External/$segmentName/all", None, Scale.Unit) + } + } + + val httpDispatcher = Metric.fromKamonMetricSnapshot(accumulatedHttpDispatcher, "HttpDispatcher", None, Scale.Unit) + val webTransaction = Metric.fromKamonMetricSnapshot(accumulatedHttpDispatcher, "WebTransaction", None, Scale.Unit) + val external = Metric.fromKamonMetricSnapshot(accumulatedExternalServices, "External", None, Scale.Unit) + val externalAllWeb = Metric.fromKamonMetricSnapshot(accumulatedExternalServices, "External/allWeb", None, Scale.Unit) + + Map(httpDispatcher, webTransaction, external, externalAllWeb, apdexBuilder.build) ++ transactionMetrics.flatten.toMap + } +} + +class ApdexBuilder(name: String, scope: Option[String], apdexT: Double) { + val frustratingThreshold = 4 * apdexT + + var satisfying = 0L + var tolerating = 0L + var frustrating = 0L + + def record(duration: Double, count: Long): Unit = + if (duration <= apdexT) + satisfying += count + else if (duration <= frustratingThreshold) + tolerating += count + else + frustrating += count + + // NewRelic reuses the same metric structure for recording the Apdex.. weird, but that's how it works. + def build: Metric = (MetricID(name, scope), MetricData(satisfying, tolerating, frustrating, apdexT, apdexT, 0)) +} |