diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/config/ConfigApplyDelegate.java b/incubator/api/src/main/java/org/onosproject/incubator/net/config/ConfigApplyDelegate.java
new file mode 100644
index 0000000..3d3ac6c
--- /dev/null
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/config/ConfigApplyDelegate.java
@@ -0,0 +1,30 @@
+/*
+ * 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.incubator.net.config;
+
+/**
+ * Delegate for notification when configuration changes have been applied.
+ */
+public interface ConfigApplyDelegate<S> {
+
+    /**
+     * Processes changes applied to the specified configuration.
+     *
+     * @param config changed configuration
+     */
+    void onApply(Config<S> config);
+
+}