Merge branch 'wip/improve-metric-recorders-infrastructure'

Conflicts:
	kamon-system-metrics/src/main/scala/kamon/system/SystemMetricsCollector.scala

1 files changed, 22 insertions, 0 deletions

diff --git a/kamon-core/src/main/scala/kamon/util/FastDispatch.scala b/kamon-core/src/main/scala/kamon/util/FastDispatch.scala
new file mode 100644
index 00000000..8f23164a
--- /dev/null
+++ b/kamon-core/src/main/scala/kamon/util/FastDispatch.scala
@@ -0,0 +1,22 @@
+package kamon.util
+
+import akka.actor.ActorRef
+
+import scala.concurrent.{ ExecutionContext, Future }
+
+/**
+ *  Extension for Future[ActorRef]. Try to dispatch a message to a Future[ActorRef] in the same thread if it has already
+ *  completed or do the regular scheduling otherwise. Specially useful when using the ModuleSupervisor extension to
+ *  create actors.
+ */
+object FastDispatch {
+  implicit class Syntax(val target: Future[ActorRef]) extends AnyVal {
+
+    def fastDispatch(message: Any)(implicit ec: ExecutionContext): Unit =
+      if (target.isCompleted)
+        target.value.get.map(_ ! message)
+      else
+        target.map(_ ! message)
+  }
+
+}