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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.trace
import akka.actor.{ExtendedActorSystem, ActorSystem}
import akka.dispatch.AbstractNodeQueue
import kamon.Kamon
import kamon.metrics.{TraceMetrics, Metrics}
import java.util.concurrent.atomic.AtomicLong
sealed trait TracingLevelOfDetail
case object OnlyMetrics extends TracingLevelOfDetail
case object SimpleTrace extends TracingLevelOfDetail
case object FullTrace extends TracingLevelOfDetail
trait TraceContext {
def token: String
def name: String
def rename(newName: String): Unit
def levelOfDetail: TracingLevelOfDetail
def startSegment
def finish(metadata: Map[String, String])
}
trait TraceContextAware {
def captureMark: Long
def traceContext: Option[TraceContext]
}
object TraceContextAware {
def default: TraceContextAware = new TraceContextAware {
val captureMark = System.nanoTime()
val traceContext = TraceRecorder.currentContext
}
}
object TraceContext {
}
class SimpleMetricCollectionContext(val token: String, @volatile private var _name: String, val system: ActorSystem,
metadata: Map[String, String]) extends TraceContext {
val levelOfDetail = OnlyMetrics
@volatile private var _isOpen = true
val startMark = System.nanoTime()
def name: String = _name
def rename(newName: String): Unit = _name = newName
def isOpen(): Boolean = _isOpen
def finish(metadata: Map[String, String]): Unit = {
val finishMark = System.nanoTime()
// Store all metrics!
val metricsExtension = Kamon(Metrics)(system)
val metricRecorder = metricsExtension.register(name, TraceMetrics)
metricRecorder.map { traceMetrics =>
traceMetrics.elapsedTime.record(finishMark - startMark)
}
}
override def startSegment: Unit = ???
}
private[kamon] class SegmentRecordingQueue extends AbstractNodeQueue[String]
class TraceRecorder(system: ExtendedActorSystem) {
}
object TraceRecorder {
private val tokenCounter = new AtomicLong
private val traceContextStorage = new ThreadLocal[Option[TraceContext]] {
override def initialValue(): Option[TraceContext] = None
}
private def newTraceContext(name: String, token: Option[String], metadata: Map[String, String], system: ActorSystem): TraceContext = ???
def setContext(context: Option[TraceContext]): Unit = traceContextStorage.set(context)
def clearContext: Unit = traceContextStorage.set(None)
def currentContext: Option[TraceContext] = traceContextStorage.get()
def start(name: String, token: Option[String] = None, metadata: Map[String, String] = Map.empty)(implicit system: ActorSystem) = {
val ctx = newTraceContext(name, token, metadata, system)
traceContextStorage.set(Some(ctx))
}
def withContext[T](context: Option[TraceContext])(thunk: => T): T = {
val oldContext = currentContext
setContext(context)
try thunk finally setContext(oldContext)
}
def finish(metadata: Map[String, String] = Map.empty): Unit = currentContext.map(_.finish(metadata))
}
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