Changed so that the configured FQCN of the mailboxType must be a MailboxType, not the Mailbox. See #1458

akka-actor/src/main/scala/akka/dispatch/Mailbox.scala

@@ -37,6 +37,13 @@ object Mailbox {
 
 /**
  * Custom mailbox implementations are implemented by extending this class.
+ * E.g.
+ * <pre<code>
+ * class MyMailbox(owner: ActorContext) extends CustomMailbox(owner)
+ *   with QueueBasedMessageQueue with UnboundedMessageQueueSemantics with DefaultSystemMessageQueue {
+ *   val queue = new ConcurrentLinkedQueue[Envelope]()
+ * }
+ * </code></pre>
  */
 abstract class CustomMailbox(val actorContext: ActorContext) extends Mailbox(actorContext.asInstanceOf[ActorCell])
 
@@ -373,29 +380,3 @@ case class BoundedPriorityMailbox( final val cmp: Comparator[Envelope], final va
     }
 }
 
-/**
- * Mailbox factory that creates instantiates the implementation from a
- * fully qualified class name. The implementation class must have
- * a constructor with a [[akka.actor.ActorContext]] parameter.
- * E.g.
- * <pre<code>
- * class MyMailbox(owner: ActorContext) extends CustomMailbox(owner)
- *   with QueueBasedMessageQueue with UnboundedMessageQueueSemantics with DefaultSystemMessageQueue {
- *   val queue = new ConcurrentLinkedQueue[Envelope]()
- * }
- * </code></pre>
- */
-class CustomMailboxType(mailboxFQN: String) extends MailboxType {
-
-  override def create(receiver: ActorContext): Mailbox = {
-    val constructorSignature = Array[Class[_]](classOf[ActorContext])
-    ReflectiveAccess.createInstance[Mailbox](mailboxFQN, constructorSignature, Array[AnyRef](receiver)) match {
-      case Right(instance) ⇒ instance
-      case Left(exception) ⇒
-        throw new IllegalArgumentException("Cannot instantiate mailbox [%s] due to: %s".
-          format(mailboxFQN, exception.toString))
-    }
-  }
-
-}
-