[ONOS-3688] Implement application for Openstack Node bootstrap
- Using OVSDB connnection, it makes bridge and vxlan tunnel for Openstack Nodes.
- Reading nodes information from network config supported

Change-Id: I1c0483b146ace19cd77ac91141182ee9200a9432
diff --git a/apps/openstacknode/src/main/java/org/onosproject/openstacknode/OpenstackNodeConfig.java b/apps/openstacknode/src/main/java/org/onosproject/openstacknode/OpenstackNodeConfig.java
new file mode 100644
index 0000000..ffd45ca
--- /dev/null
+++ b/apps/openstacknode/src/main/java/org/onosproject/openstacknode/OpenstackNodeConfig.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright 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.openstacknode;
+
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.google.common.collect.Sets;
+import org.onlab.packet.Ip4Address;
+import org.onlab.packet.MacAddress;
+import org.onlab.packet.TpPort;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.net.DeviceId;
+import org.slf4j.Logger;
+import java.util.Set;
+import org.onosproject.net.config.Config;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Configuration object for OpensatckNode service.
+ */
+public class OpenstackNodeConfig extends Config<ApplicationId> {
+
+    protected final Logger log = getLogger(getClass());
+
+
+    public static final String NODES = "nodes";
+    public static final String HOST_NAME = "hostname";
+    public static final String OVSDB_IP = "ovsdbIp";
+    public static final String OVSDB_PORT = "ovsdbPort";
+    public static final String BRIDGE_ID = "bridgeId";
+    public static final String NODE_TYPE = "openstackNodeType";
+    public static final String GATEWAY_EXTERNAL_INTERFACE_NAME = "gatewayExternalInterfaceName";
+    public static final String GATEWAY_EXTERNAL_INTERFACE_MAC = "gatewayExternalInterfaceMac";
+
+    /**
+     * Returns the set of nodes read from network config.
+     *
+     * @return set of OpensatckNodeConfig or null
+     */
+    public Set<OpenstackNode> openstackNodes() {
+
+        Set<OpenstackNode> nodes = Sets.newHashSet();
+
+        JsonNode jsonNodes = object.get(NODES);
+        if (jsonNodes == null) {
+            return null;
+        }
+
+        jsonNodes.forEach(jsonNode -> {
+            try {
+                if (OpenstackNodeService.OpenstackNodeType.valueOf(jsonNode.path(NODE_TYPE).asText()) ==
+                        OpenstackNodeService.OpenstackNodeType.COMPUTENODE) {
+                    nodes.add(new OpenstackNode(
+                            jsonNode.path(HOST_NAME).asText(),
+                            Ip4Address.valueOf(jsonNode.path(OVSDB_IP).asText()),
+                            TpPort.tpPort(jsonNode.path(OVSDB_PORT).asInt()),
+                            DeviceId.deviceId(jsonNode.path(BRIDGE_ID).asText()),
+                            OpenstackNodeService.OpenstackNodeType.valueOf(jsonNode.path(NODE_TYPE).asText()),
+                            null, MacAddress.NONE));
+                } else {
+                    nodes.add(new OpenstackNode(
+                            jsonNode.path(HOST_NAME).asText(),
+                            Ip4Address.valueOf(jsonNode.path(OVSDB_IP).asText()),
+                            TpPort.tpPort(jsonNode.path(OVSDB_PORT).asInt()),
+                            DeviceId.deviceId(jsonNode.path(BRIDGE_ID).asText()),
+                            OpenstackNodeService.OpenstackNodeType.valueOf(jsonNode.path(NODE_TYPE).asText()),
+                            jsonNode.path(GATEWAY_EXTERNAL_INTERFACE_NAME).asText(),
+                            MacAddress.valueOf(jsonNode.path(GATEWAY_EXTERNAL_INTERFACE_MAC).asText())));
+                }
+            } catch (IllegalArgumentException | NullPointerException e) {
+                log.error("Failed to read {}", e.toString());
+            }
+        });
+        return nodes;
+    }
+}