Make SessionDestroyListener Serializable

Change-Id: I27a0a67208f7d8ef7ec580836b85172772039d25

diff --git a/server/src/com/vaadin/server/SessionDestroyListener.java b/server/src/com/vaadin/server/SessionDestroyListener.java
index dee45da3d5cf098caeaec8f1dc43ae5de84ab840..607deb8b2f44d5c17fa7db1e90bec39ffba1fa70 100644 (file)
--- a/server/src/com/vaadin/server/SessionDestroyListener.java
+++ b/server/src/com/vaadin/server/SessionDestroyListener.java
@@ -16,6 +16,8 @@
 
 package com.vaadin.server;
 
+import java.io.Serializable;
+
 /**
  * A listener that gets notified when a Vaadin service session is no longer
  * used.
@@ -25,7 +27,7 @@ package com.vaadin.server;
  * @author Vaadin Ltd
  * @since 7.0.0
  */
-public interface SessionDestroyListener {
+public interface SessionDestroyListener extends Serializable {
     /**
      * Called when a Vaadin service session is no longer used.
      *