ONOS-2161 Add OVSDB adapter api in south bound.
Change-Id: I01e2976769b225444ab6fb94cb2fe9d26921ba1f
diff --git a/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/driver/OvsdbAgent.java b/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/driver/OvsdbAgent.java
new file mode 100644
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--- /dev/null
+++ b/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/driver/OvsdbAgent.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2015 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.ovsdb.controller.driver;
+
+import org.onosproject.ovsdb.controller.OvsdbNodeId;
+import org.onosproject.ovsdb.controller.OvsdbClientService;
+
+/**
+ * Responsible for keeping track of the current set of nodes connected to the
+ * system.
+ */
+public interface OvsdbAgent {
+ /**
+ * Add a node that has just connected to the system.
+ *
+ * @param nodeId the nodeId to add
+ * @param ovsdbClient the actual node object.
+ */
+ void addConnectedNode(OvsdbNodeId nodeId, OvsdbClientService ovsdbClient);
+
+ /**
+ * Clear all state in controller node maps for a node that has disconnected
+ * from the local controller. Also release control for that node from the
+ * global repository. Notify node listeners.
+ *
+ * @param nodeId the node id to be removed.
+ */
+ void removeConnectedNode(OvsdbNodeId nodeId);
+}