Add a missing space

[controller.git] / opendaylight / md-sal / sal-akka-raft / src / main / java / org / opendaylight / controller / cluster / raft / persisted / NoopPayload.java

diff --git a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/persisted/NoopPayload.java b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/persisted/NoopPayload.java
index 2393a30610be51f7bd860edc45e20fcbbd66fa31..46628c6078408445662942029b2f8df004aab2bd 100644 (file)
--- a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/persisted/NoopPayload.java
+++ b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/persisted/NoopPayload.java
@@ -7,6 +7,7 @@
  */
 package org.opendaylight.controller.cluster.raft.persisted;
 
+import akka.dispatch.ControlMessage;
 import java.io.Serializable;
 import org.opendaylight.controller.cluster.raft.protobuff.client.messages.Payload;
 
@@ -16,10 +17,21 @@ import org.opendaylight.controller.cluster.raft.protobuff.client.messages.Payloa
  *
  * @author Thomas Pantelis
  */
-public final class NoopPayload extends Payload implements Serializable {
-    private static final long serialVersionUID = 1L;
+public final class NoopPayload extends Payload implements Serializable, ControlMessage {
     public static final NoopPayload INSTANCE = new NoopPayload();
 
+    // There is no need for Externalizable
+    private static final class Proxy implements Serializable {
+        private static final long serialVersionUID = 1L;
+
+        private Object readResolve() {
+            return INSTANCE;
+        }
+    }
+
+    private static final long serialVersionUID = 1L;
+    private static final Proxy PROXY = new Proxy();
+
     private NoopPayload() {
     }
 
@@ -28,7 +40,7 @@ public final class NoopPayload extends Payload implements Serializable {
         return 0;
     }
 
-    private Object readResolve() {
-        return INSTANCE;
+    private Object writeReplace() {
+        return PROXY;
     }
 }