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package kamon.instrumentation
import org.aspectj.lang.annotation.{DeclareMixin, After, Pointcut, Aspect}
import kamon.{TraceContext, Tracer}
import kamon.trace.UowTracing.{Finish, Rename}
import spray.http.HttpRequest
import spray.can.server.{OpenRequest, OpenRequestComponent}
import kamon.trace.context.TracingAwareContext
//import spray.can.client.HttpHostConnector.RequestContext
trait ContextAware {
def traceContext: Option[TraceContext]
}
@Aspect
class SprayOpenRequestContextTracing {
@DeclareMixin("spray.can.server.OpenRequestComponent.DefaultOpenRequest")
def mixinContextAwareToOpenRequest: ContextAware = new ContextAware {
val traceContext: Option[TraceContext] = Tracer.traceContext.value
}
}
@Aspect
class SprayServerInstrumentation {
@Pointcut("execution(spray.can.server.OpenRequestComponent$DefaultOpenRequest.new(..)) && this(openRequest) && args(enclosing, request, closeAfterResponseCompletion, timestamp)")
def openRequestInit(openRequest: OpenRequest, enclosing: OpenRequestComponent, request: HttpRequest, closeAfterResponseCompletion: Boolean, timestamp: Long): Unit = {}
@After("openRequestInit(openRequest, enclosing, request, closeAfterResponseCompletion, timestamp)")
def afterInit(openRequest: OpenRequest, enclosing: OpenRequestComponent, request: HttpRequest, closeAfterResponseCompletion: Boolean, timestamp: Long): Unit = {
Tracer.start
val discard = openRequest.asInstanceOf[ContextAware].traceContext
Tracer.context().map(_.tracer ! Rename(request.uri.path.toString()))
}
@Pointcut("execution(* spray.can.server.OpenRequestComponent$DefaultOpenRequest.handleResponseEndAndReturnNextOpenRequest(..)) && target(openRequest)")
def openRequestCreation(openRequest: OpenRequest): Unit = {}
@After("openRequestCreation(openRequest)")
def afterFinishingRequest(openRequest: OpenRequest): Unit = {
val original = openRequest.asInstanceOf[ContextAware].traceContext
Tracer.context().map(_.tracer ! Finish())
if(Tracer.context() != original) {
println(s"OMG DIFFERENT Original: [${original}] - Came in: [${Tracer.context}]")
}
}
@Pointcut("execution(spray.can.client.HttpHostConnector.RequestContext.new(..)) && this(ctx)")
def requestRecordInit(ctx: TracingAwareContext): Unit = {}
@After("requestRecordInit(ctx)")
def whenCreatedRequestRecord(ctx: TracingAwareContext): Unit = {
// Necessary to force the initialization of TracingAwareRequestContext at the moment of creation.
ctx.traceContext
}
}
case class DefaultTracingAwareRequestContext(traceContext: Option[TraceContext] = Tracer.context(), timestamp: Long = System.nanoTime) extends TracingAwareContext
@Aspect
class SprayRequestContextTracing {
@DeclareMixin("spray.can.client.HttpHostConnector.RequestContext")
def mixin: TracingAwareContext = DefaultTracingAwareRequestContext()
}
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