Change OLT app to push Q-in-Q tagging flows rather than transparent VLAN flows.

Device VLAN is set through configuration, subscriber VLAN can be added using
CLI (eventually this will come through a call from the AAA app).

Moving towards generalizing this app as an 'Access Device' app rather than purely OLT.

Change-Id: I9b82b39f6a2dee2c6f10f3fd13b261f3e0313db7
diff --git a/src/main/java/org/onosproject/olt/AccessDeviceService.java b/src/main/java/org/onosproject/olt/AccessDeviceService.java
new file mode 100644
index 0000000..bd82f48
--- /dev/null
+++ b/src/main/java/org/onosproject/olt/AccessDeviceService.java
@@ -0,0 +1,41 @@
+/*
+ * 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.olt;
+
+import org.onlab.packet.VlanId;
+import org.onosproject.net.ConnectPoint;
+
+/**
+ * Service for interacting with an access device (OLT).
+ */
+public interface AccessDeviceService {
+
+    /**
+     * Provisions connectivity for a subscriber on an access device.
+     *
+     * @param port subscriber's connection point
+     * @param vlan VLAN ID to provision for subscriber
+     */
+    void provisionSubscriber(ConnectPoint port, VlanId vlan);
+
+    /**
+     * Removes provisioned connectivity for a subscriber from an access device.
+     *
+     * @param port subscriber's connection point
+     */
+    void removeSubscriber(ConnectPoint port);
+}