package org.opendaylight.controller.cluster.raft.behaviors;
import akka.actor.ActorRef;
+import javax.annotation.Nullable;
import org.opendaylight.controller.cluster.raft.RaftState;
/**
* @param sender The sender of the message
* @param message A message that needs to be processed
*
- * @return The new behavior or current behavior
+ * @return The new behavior or current behavior, or null if the message was not handled.
*/
- RaftActorBehavior handleMessage(ActorRef sender, Object message);
+ @Nullable RaftActorBehavior handleMessage(ActorRef sender, Object message);
/**
*