diff options
Diffstat (limited to 'kamon-spray/src/main/scala/spray')
-rw-r--r-- | kamon-spray/src/main/scala/spray/can/server/ServerRequestInstrumentation.scala (renamed from kamon-spray/src/main/scala/spray/can/server/ServerRequestTracing.scala) | 56 |
1 files changed, 40 insertions, 16 deletions
diff --git a/kamon-spray/src/main/scala/spray/can/server/ServerRequestTracing.scala b/kamon-spray/src/main/scala/spray/can/server/ServerRequestInstrumentation.scala index b7479d2b..244d66ed 100644 --- a/kamon-spray/src/main/scala/spray/can/server/ServerRequestTracing.scala +++ b/kamon-spray/src/main/scala/spray/can/server/ServerRequestInstrumentation.scala @@ -16,16 +16,18 @@ package spray.can.server import org.aspectj.lang.annotation._ -import kamon.trace.{ TraceRecorder, TraceContextAware } +import kamon.trace.{ TraceContext, TraceRecorder, TraceContextAware } import akka.actor.ActorSystem -import spray.http.HttpRequest +import spray.http.{ HttpResponse, HttpMessagePartWrapper, HttpRequest } import akka.event.Logging.Warning import scala.Some import kamon.Kamon import kamon.spray.Spray +import org.aspectj.lang.ProceedingJoinPoint +import spray.http.HttpHeaders.RawHeader @Aspect -class ServerRequestTracing { +class ServerRequestInstrumentation { @DeclareMixin("spray.can.server.OpenRequestComponent.DefaultOpenRequest") def mixinContextAwareToOpenRequest: TraceContextAware = TraceContextAware.default @@ -57,30 +59,52 @@ class ServerRequestTracing { TraceRecorder.clearContext } - @Pointcut("execution(* spray.can.server.OpenRequestComponent$DefaultOpenRequest.handleResponseEndAndReturnNextOpenRequest(..)) && target(openRequest)") - def openRequestCreation(openRequest: TraceContextAware): Unit = {} + @Pointcut("execution(* spray.can.server.OpenRequestComponent$DefaultOpenRequest.handleResponseEndAndReturnNextOpenRequest(..)) && target(openRequest) && args(response)") + def openRequestCreation(openRequest: TraceContextAware, response: HttpMessagePartWrapper): Unit = {} - @After("openRequestCreation(openRequest)") - def afterFinishingRequest(openRequest: TraceContextAware): Unit = { - val storedContext = openRequest.traceContext + @Around("openRequestCreation(openRequest, response)") + def afterFinishingRequest(pjp: ProceedingJoinPoint, openRequest: TraceContextAware, response: HttpMessagePartWrapper): Any = { val incomingContext = TraceRecorder.currentContext + val storedContext = openRequest.traceContext + + verifyTraceContextConsistency(incomingContext, storedContext) + val proceedResult = incomingContext match { + case None ⇒ pjp.proceed() + case Some(traceContext) ⇒ + val sprayExtension = Kamon(Spray)(traceContext.system) + + if (sprayExtension.includeTraceToken) { + val responseWithHeader = includeTraceTokenIfPossible(response, sprayExtension.traceTokenHeaderName, traceContext.token) + pjp.proceed(Array(openRequest, responseWithHeader)) + + } else pjp.proceed + } + TraceRecorder.finish() + proceedResult + } - for (original ← storedContext) { - incomingContext match { + def verifyTraceContextConsistency(incomingTraceContext: Option[TraceContext], storedTraceContext: Option[TraceContext]): Unit = { + for (original ← storedTraceContext) { + incomingTraceContext match { case Some(incoming) if original.token != incoming.token ⇒ - publishWarning(s"Different ids when trying to close a Trace, original: [$original] - incoming: [$incoming]") + publishWarning(s"Different ids when trying to close a Trace, original: [$original] - incoming: [$incoming]", incoming.system) case Some(_) ⇒ // nothing to do here. case None ⇒ - publishWarning(s"Trace context not present while closing the Trace: [$original]") + publishWarning(s"Trace context not present while closing the Trace: [$original]", original.system) } } - def publishWarning(text: String): Unit = { - val system: ActorSystem = openRequest.asInstanceOf[OpenRequest].context.actorContext.system - system.eventStream.publish(Warning("", classOf[ServerRequestTracing], text)) - } + def publishWarning(text: String, system: ActorSystem): Unit = + system.eventStream.publish(Warning("", classOf[ServerRequestInstrumentation], text)) + } + + def includeTraceTokenIfPossible(response: HttpMessagePartWrapper, traceTokenHeaderName: String, token: String): HttpMessagePartWrapper = + response match { + case response: HttpResponse ⇒ response.withHeaders(RawHeader(traceTokenHeaderName, token)) + case other ⇒ other + } } |