ONOS-5182 Refactored SONA to cache network states

Change-Id: Ib316fa5fa5d36e9da370a1578ac55de4a8dd9b04
diff --git a/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/api/OpenstackNetworkAdminService.java b/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/api/OpenstackNetworkAdminService.java
new file mode 100644
index 0000000..5ebb559
--- /dev/null
+++ b/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/api/OpenstackNetworkAdminService.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2017-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.api;
+
+import org.openstack4j.model.network.Network;
+import org.openstack4j.model.network.Port;
+import org.openstack4j.model.network.Subnet;
+
+/**
+ * Service for administering the inventory of OpenStack network, subnet and port.
+ */
+public interface OpenstackNetworkAdminService {
+
+    /**
+     * Creates a network with the given information.
+     *
+     * @param network the new network
+     */
+    void createNetwork(Network network);
+
+    /**
+     * Updates the network with the given information.
+     *
+     * @param network the updated network
+     */
+    void updateNetwork(Network network);
+
+    /**
+     * Removes the network with the given network id.
+     *
+     * @param networkId network id
+     */
+    void removeNetwork(String networkId);
+
+    /**
+     * Creates a subnet with the given information.
+     *
+     * @param subnet the new subnet
+     */
+    void createSubnet(Subnet subnet);
+
+    /**
+     * Updates a subnet with the given information.
+     *
+     * @param subnet the updated subnet
+     */
+    void updateSubnet(Subnet subnet);
+
+    /**
+     * Removes the subnet with the given subnet id.
+     *
+     * @param subnetId subnet id
+     */
+    void removeSubnet(String subnetId);
+
+    /**
+     * Creates a port with the given information.
+     *
+     * @param port the new port
+     */
+    void createPort(Port port);
+
+    /**
+     * Updates the port with the given information.
+     *
+     * @param port the updated port
+     */
+    void updatePort(Port port);
+
+    /**
+     * Removes the port with the given port id.
+     *
+     * @param portId port id
+     */
+    void removePort(String portId);
+}