change the type of the handler function, and go down the rabbit hole a bit. Add a Procedure2[T1,T2] to the Java API, and add JavaEventHandler that gives access from java to the EventHandler, add docs for configuring the handler in declarative Supervision for Scala and Java.

akka-actor/src/main/java/akka/event/JavaEventHandler.java

@@ -0,0 +1,35 @@
+package akka.event;
+
+
+import akka.actor.ActorRef;
+
+/**
+ * Java API for Akka EventHandler
+ */
+
+public class JavaEventHandler {
+
+
+    public static void notify(Object message){
+        EventHandler$.MODULE$.notify(message);
+    }
+
+    public static void debug(ActorRef instance, Object message){
+        EventHandler$.MODULE$.debug(instance, message);
+    }
+
+    public static void info(ActorRef instance, Object message){
+        EventHandler$.MODULE$.info(instance,message);
+    }
+
+    public static void warning(ActorRef instance, Object message){
+        EventHandler$.MODULE$.warning(instance,message);
+    }
+
+    public static void error(ActorRef instance, Object message){
+        EventHandler$.MODULE$.debug(instance,message);
+    }
+
+}
+
+