Refactored OpenstackRouting to support multiple gateway nodes

Change-Id: I6870ca9a4fd6f6b1cf2d2be72f52ef87827e1d2c
diff --git a/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/OpenstackFloatingIpService.java b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/OpenstackFloatingIpService.java
new file mode 100644
index 0000000..5f9f6b3
--- /dev/null
+++ b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/OpenstackFloatingIpService.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2016-present 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 org.onosproject.openstackinterface.OpenstackFloatingIP;
+
+/**
+ * Handles floating IP update requests from OpenStack.
+ */
+public interface OpenstackFloatingIpService {
+
+    enum Action {
+        ASSOCIATE,
+        DISSASSOCIATE
+    }
+
+    /**
+     * Handles floating IP create request from OpenStack.
+     *
+     * @param floatingIp floating IP information
+     */
+    void createFloatingIp(OpenstackFloatingIP floatingIp);
+
+    /**
+     * Handles floating IP update request from OpenStack.
+     *
+     * @param floatingIp floating IP information
+     */
+    void updateFloatingIp(OpenstackFloatingIP floatingIp);
+
+    /**
+     * Handles floating IP remove request from OpenStack.
+     *
+     * @param floatingIpId floating ip identifier
+     */
+    void deleteFloatingIp(String floatingIpId);
+}