From 670bb396f9a03023b94acaec1793ea06f25ae99d Mon Sep 17 00:00:00 2001
From: Viktor Klang <viktor.klang@gmail.com>
Date: Mon, 23 Apr 2012 19:07:27 +0200
Subject: [PATCH] Adding @implicitNotFound annotation on LogSource

---
 akka-actor/src/main/scala/akka/event/Logging.scala | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/akka-actor/src/main/scala/akka/event/Logging.scala b/akka-actor/src/main/scala/akka/event/Logging.scala
index 3383ea2fee..1a2cb2c520 100644
--- a/akka-actor/src/main/scala/akka/event/Logging.scala
+++ b/akka-actor/src/main/scala/akka/event/Logging.scala
@@ -14,6 +14,7 @@ import java.util.concurrent.atomic.AtomicInteger
 import scala.util.control.NoStackTrace
 import java.util.concurrent.TimeoutException
 import akka.dispatch.Await
+import annotation.implicitNotFound
 
 /**
  * This trait brings log level handling to the EventStream: it reads the log
@@ -211,7 +212,7 @@ trait LoggingBus extends ActorEventBus {
  *
  * The default implementation of the second variant will just call the first.
  */
-trait LogSource[-T] {
+@implicitNotFound("Cannot find LogSource for ${T} please see ScalaDoc for LogSource for how to obtain or construct one.") trait LogSource[-T] {
   def genString(t: T): String
   def genString(t: T, system: ActorSystem): String = genString(t)
   def getClazz(t: T): Class[_] = t.getClass