X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-distributed-datastore%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Fdatastore%2FOperationCallback.java;h=da0b62b7c398e98aa80d15a008c0a9adfd6c518d;hb=99f80f27bee37bb23e345420bf14bb7bb4793c28;hp=b9445361bb9ff43521b124c5c20c6aa6b1c06358;hpb=5cd6ac6819a1dcbab05c6ffbc3ac427ea41c658d;p=controller.git

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/OperationCallback.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/OperationCallback.java
index b9445361bb..da0b62b7c3 100644
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/OperationCallback.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/OperationCallback.java
@@ -8,8 +8,46 @@
 
 package org.opendaylight.controller.cluster.datastore;
 
-public interface OperationCallback {
+import java.util.concurrent.atomic.AtomicReference;
+
+interface OperationCallback {
+    OperationCallback NO_OP_CALLBACK = new OperationCallback() {
+        @Override
+        public void run() {
+        }
+
+        @Override
+        public void success() {
+        }
+
+        @Override
+        public void failure() {
+        }
+
+        @Override
+        public void pause() {
+        }
+
+        @Override
+        public void resume() {
+        }
+    };
+
+    class Reference extends AtomicReference<OperationCallback> {
+        private static final long serialVersionUID = 1L;
+
+        Reference(OperationCallback initialValue) {
+            super(initialValue);
+        }
+    }
+
     void run();
+
+    void pause();
+
+    void resume();
+
     void success();
+
     void failure();
 }