ONOS-6742 Refactored OpenstackNode

- Removed gateway node uplink interface configuration steps
- Added checking group states
- Refactored interface, store, manager and handler

Change-Id: I9149edbec6481b15377848c8f24bdc5c6c73adc4
diff --git a/apps/openstacknode/src/main/java/org/onosproject/openstacknode/api/OpenstackNodeConfig.java b/apps/openstacknode/src/main/java/org/onosproject/openstacknode/api/OpenstackNodeConfig.java
new file mode 100644
index 0000000..774342a
--- /dev/null
+++ b/apps/openstacknode/src/main/java/org/onosproject/openstacknode/api/OpenstackNodeConfig.java
@@ -0,0 +1,128 @@
+/*
+ * 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.openstacknode.api;
+
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.google.common.collect.Sets;
+import org.onlab.packet.IpAddress;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.config.Config;
+import org.onosproject.openstacknode.impl.DefaultOpenstackNode;
+
+import java.util.Set;
+
+import static org.onosproject.net.config.Config.FieldPresence.MANDATORY;
+import static org.onosproject.net.config.Config.FieldPresence.OPTIONAL;
+import static org.onosproject.openstacknode.api.OpenstackNode.NodeType.GATEWAY;
+
+/**
+ * Configuration object for OpensatckNode service.
+ */
+public final class OpenstackNodeConfig extends Config<ApplicationId> {
+
+    private static final String NODES = "nodes";
+    private static final String HOST_NAME = "hostname";
+    private static final String TYPE = "type";
+    private static final String MANAGEMENT_IP = "managementIp";
+    private static final String DATA_IP = "dataIp";
+    private static final String INTEGRATION_BRIDGE = "integrationBridge";
+
+    // GATEWAY node specific fields
+    private static final String ROUTER_BRIDGE = "routerBridge";
+    private static final String VLAN_INTF_NAME = "vlanPort";
+
+    @Override
+    public boolean isValid() {
+        boolean result = hasOnlyFields(NODES);
+        if (object.get(NODES) == null || object.get(NODES).size() < 1) {
+            return true;
+        }
+
+        for (JsonNode node : object.get(NODES)) {
+            if (get(node, DATA_IP) == null && get(node, VLAN_INTF_NAME) == null) {
+                final String msg = "There is neither tunnel interface nor vlan port";
+                throw new IllegalArgumentException(msg);
+            }
+            ObjectNode osNode = (ObjectNode) node;
+            result &= hasOnlyFields(osNode,
+                    HOST_NAME,
+                    TYPE,
+                    MANAGEMENT_IP,
+                    DATA_IP,
+                    INTEGRATION_BRIDGE,
+                    ROUTER_BRIDGE,
+                    VLAN_INTF_NAME
+            );
+
+            result &= isString(osNode, HOST_NAME, MANDATORY);
+            result &= isString(osNode, TYPE, MANDATORY);
+            result &= isIpAddress(osNode, MANAGEMENT_IP, MANDATORY);
+            result &= isString(osNode, INTEGRATION_BRIDGE, MANDATORY);
+            result &= isString(osNode, VLAN_INTF_NAME, OPTIONAL);
+            result &= isIpAddress(osNode, DATA_IP, OPTIONAL);
+
+            DeviceId.deviceId(osNode.get(INTEGRATION_BRIDGE).asText());
+            OpenstackNode.NodeType.valueOf(osNode.get(TYPE).asText());
+
+            if (osNode.get(TYPE).asText().equals(GATEWAY.name())) {
+                result &= isString(osNode, ROUTER_BRIDGE, MANDATORY);
+                DeviceId.deviceId(osNode.get(ROUTER_BRIDGE).asText());
+            }
+        }
+        return result;
+    }
+
+    /**
+     * Returns the set of nodes read from network config.
+     *
+     * @return set of openstack nodes
+     */
+    public Set<OpenstackNode> openstackNodes() {
+        Set<OpenstackNode> nodes = Sets.newHashSet();
+        for (JsonNode node : object.get(NODES)) {
+            OpenstackNode.NodeType type = OpenstackNode.NodeType.valueOf(get(node, TYPE));
+            OpenstackNode.Builder nodeBuilder = DefaultOpenstackNode.builder()
+                    .intgBridge(DeviceId.deviceId(get(node, INTEGRATION_BRIDGE)))
+                    .managementIp(IpAddress.valueOf(get(node, MANAGEMENT_IP)))
+                    .type(type)
+                    .hostname(get(node, HOST_NAME))
+                    .state(NodeState.INIT);
+
+            if (get(node, DATA_IP) != null) {
+                nodeBuilder.dataIp(IpAddress.valueOf(get(node, DATA_IP)));
+            }
+            if (get(node, VLAN_INTF_NAME) != null) {
+                nodeBuilder.vlanIntf(get(node, VLAN_INTF_NAME));
+            }
+            if (type.equals(GATEWAY)) {
+                nodeBuilder.routerBridge(DeviceId.deviceId(get(node, ROUTER_BRIDGE)));
+            }
+            nodes.add(nodeBuilder.build());
+        }
+        return nodes;
+    }
+
+    private String get(JsonNode jsonNode, String path) {
+        JsonNode jNode = jsonNode.get(path);
+        if (jNode == null || jNode.isMissingNode()) {
+            return null;
+        }
+        return jNode.asText();
+    }
+}