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/*
* =========================================================================================
* 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.spray
import akka.actor.{ ExtendedActorSystem, ExtensionIdProvider, ExtensionId }
import akka.actor
import kamon.Kamon
import kamon.http.HttpServerMetrics
import kamon.metric.Metrics
import spray.http.HttpRequest
object Spray extends ExtensionId[SprayExtension] with ExtensionIdProvider {
def lookup(): ExtensionId[_ <: actor.Extension] = Spray
def createExtension(system: ExtendedActorSystem): SprayExtension = new SprayExtension(system)
}
object ClientSegmentCollectionStrategy {
sealed trait Strategy
case object Pipelining extends Strategy
case object Internal extends Strategy
}
class SprayExtension(private val system: ExtendedActorSystem) extends Kamon.Extension {
private val config = system.settings.config.getConfig("kamon.spray")
val includeTraceToken: Boolean = config.getBoolean("automatic-trace-token-propagation")
val traceTokenHeaderName: String = config.getString("trace-token-header-name")
val httpServerMetrics = Kamon(Metrics)(system).register(HttpServerMetrics, HttpServerMetrics.Factory).get
// It's safe to assume that HttpServerMetrics will always exist because there is no particular filter for it.
val clientSegmentCollectionStrategy: ClientSegmentCollectionStrategy.Strategy =
config.getString("client.segment-collection-strategy") match {
case "pipelining" ⇒ ClientSegmentCollectionStrategy.Pipelining
case "internal" ⇒ ClientSegmentCollectionStrategy.Internal
case other ⇒ throw new IllegalArgumentException(s"Configured segment-collection-strategy [$other] is invalid, " +
s"only pipelining and internal are valid options.")
}
// Later we should expose a way for the user to customize this.
def assignHttpClientRequestName(request: HttpRequest): String = request.uri.authority.host.address
}
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