Added a AtomicValue distributed primitive.
Change-Id: I00ff165cbd9c6e4f2610af9877ff262527b7b048
diff --git a/core/api/src/main/java/org/onosproject/store/service/AtomicValueEventListener.java b/core/api/src/main/java/org/onosproject/store/service/AtomicValueEventListener.java
new file mode 100644
index 0000000..b29d903
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/store/service/AtomicValueEventListener.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.store.service;
+
+/**
+ * Listener to be notified about updates to a AtomicValue.
+ */
+public interface AtomicValueEventListener<V> {
+ /**
+ * Reacts to the specified event.
+ *
+ * @param event the event
+ */
+ void event(AtomicValueEvent<V> event);
+}