[VOL-4246] Feature parity with the previous implementation

Change-Id: I3741edb3c1b88b1cf8b5e6d4ff0900132e2e5e6a
diff --git a/api/src/main/java/org/opencord/olt/AccessDeviceService.java b/api/src/main/java/org/opencord/olt/AccessDeviceService.java
index 4878d97..9f39715 100644
--- a/api/src/main/java/org/opencord/olt/AccessDeviceService.java
+++ b/api/src/main/java/org/opencord/olt/AccessDeviceService.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-present Open Networking Foundation
+ * Copyright 2021-present Open Networking Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,93 +16,62 @@
 
 package org.opencord.olt;
 
-import java.util.List;
-import java.util.Optional;
-import java.util.Set;
-
 import org.onlab.packet.VlanId;
 import org.onosproject.event.ListenerService;
 import org.onosproject.net.ConnectPoint;
 import org.onosproject.net.DeviceId;
 
-import com.google.common.collect.ImmutableMap;
-import org.opencord.sadis.UniTagInformation;
+import java.util.List;
 
-/**
- * Service for interacting with an access device (OLT).
- */
-public interface AccessDeviceService
-        extends ListenerService<AccessDeviceEvent, AccessDeviceListener> {
-
+public interface AccessDeviceService extends ListenerService<AccessDeviceEvent, AccessDeviceListener> {
     /**
      * Provisions connectivity for a subscriber on an access device.
-     * Installs flows for all uni tag information
+     * It installs flows for all uni tag information
      *
-     * @param port subscriber's connection point
-     * @return true if successful false otherwise
+     * @param cp subscriber's connection point
+     * @return true if the request is accepted (does not guarantee the subscriber is provisioned)
      */
-    boolean provisionSubscriber(ConnectPoint port);
+    boolean provisionSubscriber(ConnectPoint cp);
 
     /**
-     * Removes provisioned connectivity for a subscriber from an access device.
-     * Removes flows for all uni tag information
-     *
-     * @param port subscriber's connection point
-     * @return true if successful false otherwise
+     * Removes subscriber flows from a given ConnectPoint.
+     * @param cp subscriber's connect point
+     * @return true if the request is accepted (does not guarantee the subscriber is removed)
      */
-    boolean removeSubscriber(ConnectPoint port);
+    boolean removeSubscriber(ConnectPoint cp);
 
     /**
-     * Provisions a uni tag information for the specific subscriber.
-     * It finds the related uni tag information from the subscriber uni tag list
-     * and installs it
-     *
-     * @param subscriberId Identification of the subscriber
-     * @param sTag         additional outer tag on this port
-     * @param cTag         additional inner tag on this port
-     * @param tpId         additional technology profile id
-     * @return true if successful false otherwise
+     * Provisions connectivity for a particular service for a subscriber.
+     * @param cp subscriber's connect point
+     * @param cTag service's cTag
+     * @param sTag service's sTag
+     * @param tpId service's Technology Profile ID
+     * @return true if the request is accepted (does not guarantee the subscriber is provisioned)
      */
-    boolean provisionSubscriber(AccessSubscriberId subscriberId, Optional<VlanId> sTag,
-                                Optional<VlanId> cTag, Optional<Integer> tpId);
+    boolean provisionSubscriber(ConnectPoint cp, VlanId cTag, VlanId sTag, Integer tpId);
 
     /**
-     * Removes a uni tag information for the specific subscriber.
-     * It finds the related uni tag information from the subscriber uni tag list
-     * and remove it
-     *
-     * @param subscriberId Identification of the subscriber
-     * @param sTag         additional outer tag on this port
-     * @param cTag         additional inner tag on this port
-     * @param tpId         additional technology profile id
-     * @return true if successful false otherwise
+     * Removes connectivity for a particular service for a subscriber.
+     * @param cp subscriber's connect point
+     * @param cTag service's cTag
+     * @param sTag service's sTag
+     * @param tpId service's Technology Profile ID
+     * @return true if the request is accepted (does not guarantee the subscriber is removed)
      */
-    boolean removeSubscriber(AccessSubscriberId subscriberId, Optional<VlanId> sTag,
-                             Optional<VlanId> cTag, Optional<Integer> tpId);
+    boolean removeSubscriber(ConnectPoint cp, VlanId cTag, VlanId sTag, Integer tpId);
 
     /**
-     * Returns the list of active OLTs.
-     *
-     * @return a List
+     * Returns a list of connected OLT devices ID.
+     * @return a list of devices
      */
-    List<DeviceId> fetchOlts();
+    List<DeviceId> getConnectedOlts();
 
     /**
-     * Returns information about subscribers that have been programmed in the
-     * data-plane. It shows all uni tag information list of the subscribers even if
-     * these have not been programmed.
+     * Finds the ConnectPoint to which a subscriber is connected.
      *
-     * @return an immutable map of locations and subscriber information
+     * @param id The id of the subscriber, this is the same ID as in Sadis
+     * @return Subscribers ConnectPoint if found else null
      */
-    ImmutableMap<ConnectPoint, Set<UniTagInformation>> getProgSubs();
-
-    /**
-     * Returns information about subscribers that have NOT been programmed in the
-     * data-plane. It shows all uni tag information list of the subscribers even if
-     * these have not been programmed, meaning no flows have been sent to the device.
-     *
-     * @return an immutable map of locations and subscriber information
-     */
-    ImmutableMap<ConnectPoint, Set<UniTagInformation>> getFailedSubs();
+    ConnectPoint findSubscriberConnectPoint(String id);
 
 }