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package kamon.instrumentation
import org.aspectj.lang.annotation.{DeclareMixin, After, Pointcut, Aspect}
import kamon.{TraceContext, Tracer}
import kamon.trace.UowTracing.{WebExternal, Finish, Rename}
import spray.http.HttpRequest
import spray.can.server.OpenRequestComponent
import spray.can.client.HttpHostConnector.RequestContext
import spray.http.HttpHeaders.Host
@Aspect
class SprayServerInstrumentation {
@Pointcut("execution(spray.can.server.OpenRequestComponent$DefaultOpenRequest.new(..)) && args(enclosing, request, closeAfterResponseCompletion, timestamp)")
def openRequestInit(enclosing: OpenRequestComponent, request: HttpRequest, closeAfterResponseCompletion: Boolean, timestamp: Long): Unit = {}
@After("openRequestInit(enclosing, request, closeAfterResponseCompletion, timestamp)")
def afterInit(enclosing: OpenRequestComponent, request: HttpRequest, closeAfterResponseCompletion: Boolean, timestamp: Long): Unit = {
//@After("openRequestInit()")
//def afterInit(): Unit = {
Tracer.start
//println("Created the context: " + Tracer.context() + " for the transaction: " + request.uri.path.toString())
Tracer.context().map(_.entries ! Rename(request.uri.path.toString()))
}
@Pointcut("execution(* spray.can.server.OpenRequest.handleResponseEndAndReturnNextOpenRequest(..))")
def openRequestCreation(): Unit = {}
@After("openRequestCreation()")
def afterFinishingRequest(): Unit = {
println("Finishing a request: " + Tracer.context())
Tracer.context().map(_.entries ! Finish())
}
@Pointcut("execution(spray.can.client.HttpHostConnector.RequestContext.new(..)) && this(ctx)")
def requestRecordInit(ctx: TracingAwareRequestContext): Unit = {}
@After("requestRecordInit(ctx)")
def whenCreatedRequestRecord(ctx: TracingAwareRequestContext): Unit = {
// Necessary to force the initialization of TracingAwareRequestContext at the moment of creation.
ctx.context
}
@Pointcut("execution(* spray.can.client.HttpHostConnectionSlot.dispatchToCommander(..)) && args(ctx, msg)")
def requestRecordInit2(ctx: TracingAwareRequestContext, msg: Any): Unit = {}
@After("requestRecordInit2(ctx, msg)")
def whenCreatedRequestRecord2(ctx: TracingAwareRequestContext, msg: Any): Unit = {
println("=======> Spent in WEB External: " + (System.nanoTime() - ctx.timestamp))
// TODO: REMOVE THIS:
val request = (ctx.asInstanceOf[RequestContext]).request
ctx.context.map(_.entries ! WebExternal(ctx.timestamp, System.nanoTime(), request.header[Host].map(_.host).getOrElse("UNKNOWN")))
}
}
trait TracingAwareRequestContext {
def context: Option[TraceContext]
def timestamp: Long
}
case class DefaultTracingAwareRequestContext(context: Option[TraceContext] = Tracer.context(),
timestamp: Long = System.nanoTime) extends TracingAwareRequestContext
@Aspect
class SprayRequestContextTracing {
@DeclareMixin("spray.can.client.HttpHostConnector.RequestContext")
def mixin: TracingAwareRequestContext = DefaultTracingAwareRequestContext()
}
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