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package kamon.trace.instrumentation
import org.aspectj.lang.annotation.{Around, Pointcut, DeclareMixin, Aspect}
import org.aspectj.lang.ProceedingJoinPoint
import org.slf4j.MDC
import kamon.trace.{TraceContext, ContextAware, Trace}
@Aspect
class ActorLoggingInstrumentation {
@DeclareMixin("akka.event.Logging.LogEvent+")
def traceContextMixin: ContextAware = new ContextAware {
def traceContext: Option[TraceContext] = Trace.context()
}
@Pointcut("execution(* akka.event.slf4j.Slf4jLogger.withMdc(..)) && args(logSource, logEvent, logStatement)")
def withMdcInvocation(logSource: String, logEvent: ContextAware, logStatement: () => _): Unit = {}
@Around("withMdcInvocation(logSource, logEvent, logStatement)")
def putTraceContextInMDC(pjp: ProceedingJoinPoint, logSource: String, logEvent: ContextAware, logStatement: () => _): Unit = {
logEvent.traceContext match {
case Some(ctx) =>
MDC.put("uow", ctx.uow)
pjp.proceed()
MDC.remove("uow")
case None => pjp.proceed()
}
}
}
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