Refactoring of OpenstackSwitching and OpenstackRouting

Change-Id: Ib7caea98006274dcdfebfe27c07e3533730ab23e
diff --git a/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/OpenstackSwitchingService.java b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/OpenstackSwitchingService.java
new file mode 100644
index 0000000..9f70a00
--- /dev/null
+++ b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/OpenstackSwitchingService.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2015-2016 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.openstacknetworking;
+
+import java.util.Map;
+
+/**
+ * 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.
+     *
+     * @param uuid UUID
+     */
+    void removePort(String uuid);
+
+    /**
+     * Updates flow rules corresponding to the port information updated by Openstack.
+     *
+     * @param openstackPort OpenStack port
+     */
+    void updatePort(OpenstackPort openstackPort);
+
+    /**
+     * Stores the network information created by openstack.
+     *
+     * @param openstackNetwork network information
+     */
+    void createNetwork(OpenstackNetwork openstackNetwork);
+
+    /**
+     * Stores the subnet information created by openstack.
+     *
+     * @param openstackSubnet subnet information
+     */
+    void createSubnet(OpenstackSubnet openstackSubnet);
+
+    /**
+     * Retruns OpenstackPortInfo map.
+     *
+     * @return OpenstackPortInfo map
+     */
+    Map<String, OpenstackPortInfo> openstackPortInfo();
+
+}