/*
* =========================================================================================
* 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.{ MetricKey, EntitySnapshot, Entity }
import kamon.metric.instrument.CollectionContext
object CustomMetricExtractor extends MetricExtractor {
def extract(settings: AgentSettings, collectionContext: CollectionContext, metrics: Map[Entity, EntitySnapshot]): Map[MetricID, MetricData] = {
val (simple, complex) = metrics filter customMetric partition simpleMetrics
simple.flatMap(toNewRelicMetric(simpleName)) ++ complex.flatMap(toNewRelicMetric(complexName))
}
def simpleName(entity: Entity, metricKey: MetricKey) = s"Custom/${entity.category}/${normalize(entity.name)}"
def complexName(entity: Entity, metricKey: MetricKey) = s"${simpleName(entity, metricKey)}/${metricKey.name}"
def normalize(name: String) = name.replace('/', '#').replaceAll("""[\]\[\|\*]""", "_")
def customMetric(kv: (Entity, EntitySnapshot)): Boolean =
!MetricsSubscription.isTraceOrSegmentEntityName(kv._1.category)
def simpleMetrics(kv: (Entity, EntitySnapshot)): Boolean =
kamon.metric.SingleInstrumentEntityRecorder.AllCategories.contains(kv._1.category)
def toNewRelicMetric(name: (Entity, MetricKey) ⇒ String)(kv: (Entity, EntitySnapshot)) = {
val (entity, entitySnapshot) = kv
for {
(metricKey, instrumentSnapshot) ← entitySnapshot.metrics
nameStr = name(entity, metricKey)
} yield Metric(instrumentSnapshot, metricKey.unitOfMeasurement, nameStr, None)
}
}