diff --git a/apps/openstackswitching/src/main/java/org/onosproject/openstackswitching/OpenstackSwitchingService.java b/apps/openstackswitching/src/main/java/org/onosproject/openstackswitching/OpenstackSwitchingService.java
new file mode 100644
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+++ b/apps/openstackswitching/src/main/java/org/onosproject/openstackswitching/OpenstackSwitchingService.java
@@ -0,0 +1,49 @@
+/*
+ * 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.openstackswitching;
+
+/**
+ * It handles port management REST API from Openstack for VMs.
+ */
+public interface OpenstackSwitchingService {
+
+    /**
+     * Store the port information created by Openstack.
+     *
+     * @param openstackPort port information
+     */
+    void createPorts(OpenstackPort openstackPort);
+
+    /**
+     * Removes flow rules corresponding to the port removed by Openstack.
+     *
+     */
+    void deletePorts();
+
+    /**
+     * Updates flow rules corresponding to the port information updated by Openstack.
+     *
+     */
+    void updatePorts();
+
+    /**
+     * Store the network information created by openstack.
+     *
+     * @param openstackNetwork network information
+     */
+    void createNetwork(OpenstackNetwork openstackNetwork);
+
+}