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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.client
import org.aspectj.lang.annotation._
import org.aspectj.lang.ProceedingJoinPoint
import spray.http.HttpRequest
import spray.http.HttpHeaders.Host
import kamon.trace._
import spray.http.HttpRequest
import kamon.trace.TraceContext
import kamon.trace.Segments.{HttpClientRequest, Start}
import kamon.trace.Trace.SegmentCompletionHandle
trait SegmentCompletionHandleAware {
var completionHandle: Option[SegmentCompletionHandle]
}
trait ContextAndSegmentCompletionAware extends ContextAware with SegmentCompletionHandleAware
@Aspect
class SprayOpenRequestContextTracing {
@DeclareMixin("spray.can.client.HttpHostConnector.RequestContext")
def mixinContextAwareToRequestContext: ContextAndSegmentCompletionAware = new ContextAndSegmentCompletionAware {
def traceContext: Option[TraceContext] = Trace.context()
var completionHandle: Option[SegmentCompletionHandle] = None
}
}
@Aspect
class SprayServerInstrumentation {
@Pointcut("execution(spray.can.client.HttpHostConnector.RequestContext.new(..)) && this(ctx) && args(request, *, *, *)")
def requestRecordInit(ctx: ContextAndSegmentCompletionAware, request: HttpRequest): Unit = {}
@After("requestRecordInit(ctx, request)")
def whenCreatedRequestRecord(ctx: ContextAndSegmentCompletionAware, request: HttpRequest): Unit = {
val completionHandle = Trace.startSegment(Segments.Start(HttpClientRequest))
// Necessary to force the initialization of TracingAwareRequestContext at the moment of creation.
ctx.traceContext
ctx.completionHandle = Some(completionHandle)
}
@Pointcut("execution(* spray.can.client.HttpHostConnectionSlot.dispatchToCommander(..)) && args(requestContext, message)")
def dispatchToCommander(requestContext: TimedContextAware, message: Any): Unit = {}
@Around("dispatchToCommander(requestContext, message)")
def aroundDispatchToCommander(pjp: ProceedingJoinPoint, requestContext: ContextAndSegmentCompletionAware, message: Any) = {
println("Completing the request with context: " + requestContext.traceContext)
requestContext.completionHandle.map(_.complete(Segments.End()))
/*Tracer.context.withValue(requestContext.traceContext) {
requestContext.traceContext.map {
tctx => //tctx.tracer ! WebExternalFinish(requestContext.timestamp)
}
pjp.proceed()
}*/
}
@Pointcut("execution(* spray.can.client.HttpHostConnector.RequestContext.copy(..)) && this(old)")
def copyingRequestContext(old: TimedContextAware): Unit = {}
@Around("copyingRequestContext(old)")
def aroundCopyingRequestContext(pjp: ProceedingJoinPoint, old: TimedContextAware) = {
println("Instrumenting the request context copy.")
/*Tracer.traceContext.withValue(old.traceContext) {
pjp.proceed()
}*/
}
}
@Aspect
class SprayRequestContextTracing {
@DeclareMixin("spray.can.client.HttpHostConnector.RequestContext")
def mixin: ContextAware = new ContextAware {
val traceContext: Option[TraceContext] = Trace.context()
}
}
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