ONOS-5718 Dynamic Config APIs with RPC and Notification support

Change-Id: I670890efee83c86c7a3b242783c0a62879059849
diff --git a/apps/config/src/main/java/org/onosproject/config/RpcCommand.java b/apps/config/src/main/java/org/onosproject/config/RpcCommand.java
new file mode 100644
index 0000000..ada6b96
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+++ b/apps/config/src/main/java/org/onosproject/config/RpcCommand.java
@@ -0,0 +1,51 @@
+/*
+ * 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.config;
+
+import org.onosproject.config.model.ResourceIdentifier;
+/**
+ * Abstract implementation of an RPC command.
+ */
+public abstract class RpcCommand {
+    /**
+     * Identifier of an RPC command.
+     */
+    ResourceIdentifier cmdId;
+
+    /**
+     * Creates an instance of RpcCommand.
+     *
+     * @param cmdId of RPC command
+     */
+    public RpcCommand(ResourceIdentifier cmdId) {
+        this.cmdId = cmdId;
+    }
+
+    /**
+     * Returns the RPC command id.
+     *
+     * @return cmdId
+     */
+    public ResourceIdentifier cmdId() {
+        return this.cmdId;
+    }
+    /**
+     * Executes the RPC command.
+     *
+     * @param input input data to the RPC command.
+     */
+    public abstract void execute(RpcInput input);
+}
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