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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 spray.can.server
import org.aspectj.lang.annotation._
import kamon.trace.{ Trace, ContextAware }
import spray.http.HttpRequest
import akka.actor.ActorSystem
import akka.event.Logging.Warning
import org.aspectj.lang.ProceedingJoinPoint
import spray.http.HttpRequest
import akka.event.Logging.Warning
import scala.Some
@Aspect
class ServerRequestTracing {
@DeclareMixin("spray.can.server.OpenRequestComponent.DefaultOpenRequest")
def mixinContextAwareToOpenRequest: ContextAware = ContextAware.default
@Pointcut("execution(spray.can.server.OpenRequestComponent$DefaultOpenRequest.new(..)) && this(openRequest) && args(*, request, *, *)")
def openRequestInit(openRequest: ContextAware, request: HttpRequest): Unit = {}
@After("openRequestInit(openRequest, request)")
def afterInit(openRequest: ContextAware, request: HttpRequest): Unit = {
val system: ActorSystem = openRequest.asInstanceOf[OpenRequest].context.actorContext.system
val defaultTraceName: String = request.method.value + ": " + request.uri.path
Trace.start(defaultTraceName)(system)
// Necessary to force initialization of traceContext when initiating the request.
openRequest.traceContext
}
@Pointcut("execution(* spray.can.server.ServerFrontend$$anon$2$$anon$1.spray$can$server$ServerFrontend$$anon$$anon$$openNewRequest(..))")
def openNewRequest(): Unit = {}
@After("openNewRequest()")
def afterOpenNewRequest(): Unit = {
Trace.clear
}
@Pointcut("execution(* spray.can.server.OpenRequestComponent$DefaultOpenRequest.handleResponseEndAndReturnNextOpenRequest(..)) && target(openRequest)")
def openRequestCreation(openRequest: ContextAware): Unit = {}
@After("openRequestCreation(openRequest)")
def afterFinishingRequest(openRequest: ContextAware): Unit = {
val storedContext = openRequest.traceContext
val incomingContext = Trace.finish()
for (original ← storedContext) {
incomingContext match {
case Some(incoming) if original.id != incoming.id ⇒
publishWarning(s"Different ids when trying to close a Trace, original: [$original] - incoming: [$incoming]")
case Some(_) ⇒ // nothing to do here.
case None ⇒
original.finish
publishWarning(s"Trace context not present while closing the Trace: [$original]")
}
}
def publishWarning(text: String): Unit = {
val system: ActorSystem = openRequest.asInstanceOf[OpenRequest].context.actorContext.system
system.eventStream.publish(Warning("", classOf[ServerRequestTracing], text))
}
}
}
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