akka.util.FlightRecorderLoader.scala Maven / Gradle / Ivy
/*
* Copyright (C) 2020 Lightbend Inc.
*/
package akka.util
import akka.actor.{ ClassicActorSystemProvider, ExtendedActorSystem }
import akka.annotation.InternalApi
import scala.reflect.ClassTag
import scala.util.{ Failure, Success }
/**
* INTERNAL API
*/
@InternalApi
private[akka] object FlightRecorderLoader {
def load[T: ClassTag](casp: ClassicActorSystemProvider, fqcn: String, fallback: T): T = {
val system = casp.classicSystem.asInstanceOf[ExtendedActorSystem]
if (JavaVersion.majorVersion >= 11 && system.settings.config.getBoolean("akka.java-flight-recorder.enabled")) {
// Dynamic instantiation to not trigger class load on earlier JDKs
system.dynamicAccess.createInstanceFor[T](fqcn, Nil) match {
case Success(jfr) =>
jfr
case Failure(ex) =>
system.log.warning("Failed to load JFR flight recorder, falling back to noop. Exception: {}", ex.toString)
fallback
} // fallback if not possible to dynamically load for some reason
} else
// JFR not available on Java 8
fallback
}
}