X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-akka-raft%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Fraft%2Fclient%2Fmessages%2FShutdown.java;h=2f2ff47934ab0a4a85761c9f69fa90d98157fd7c;hb=refs%2Fchanges%2F14%2F103514%2F9;hp=930a4b0471f5152b4abe3f08b45b81198c67f675;hpb=4e000b89c3b5ac555cb1e2c39e999a8633b48a96;p=controller.git

diff --git a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/client/messages/Shutdown.java b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/client/messages/Shutdown.java
index 930a4b0471..2f2ff47934 100644
--- a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/client/messages/Shutdown.java
+++ b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/client/messages/Shutdown.java
@@ -7,14 +7,42 @@
  */
 package org.opendaylight.controller.cluster.raft.client.messages;
 
+import akka.dispatch.ControlMessage;
 import java.io.Serializable;
+import org.opendaylight.controller.cluster.raft.base.messages.EmptyExternalizableProxy;
 
 /**
  * Message sent to a raft actor to shutdown gracefully. If it's the leader it will transfer leadership to a
- * follower. As its last act, the actor self-destructs via a PoisonPill.
+ * follower. As its last act, the actor self-destructs via a PoisonPill. This message should only be used with
+ * Patterns.gracefulStop().
  *
  * @author Thomas Pantelis
  */
-public class Shutdown implements Serializable {
+public final class Shutdown implements Serializable, ControlMessage {
+    @java.io.Serial
     private static final long serialVersionUID = 1L;
+
+    public static final Shutdown INSTANCE = new Shutdown();
+
+    private Shutdown() {
+        // Hidden on purpose
+    }
+
+    @java.io.Serial
+    private Object readResolve() {
+        return INSTANCE;
+    }
+
+    @Deprecated(since = "7.0.0", forRemoval = true)
+    private static class Proxy extends EmptyExternalizableProxy {
+        @java.io.Serial
+        private static final long serialVersionUID = 1L;
+
+        // checkstyle flags the public modifier as redundant which really doesn't make sense since it clearly isn't
+        // redundant. It is explicitly needed for Java serialization to be able to create instances via reflection.
+        @SuppressWarnings("checkstyle:RedundantModifier")
+        public Proxy() {
+            super(INSTANCE);
+        }
+    }
 }