[ONOS-3831,ONOS-3836] Load balance algorithm for sfc

Change-Id: I48a428587420ce6d782c128b835b5bb90e0cacfe
diff --git a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/PortChain.java b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/PortChain.java
index ba87010..e89a22e 100644
--- a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/PortChain.java
+++ b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/PortChain.java
@@ -113,6 +113,13 @@
     List<PortPairId> getLoadBalancePath(FiveTuple fiveTuple);
 
     /**
+     * Get the no of load balance paths created.
+     *
+     * @return size of load balanced paths
+     */
+    int getLoadBalancePathSize();
+
+    /**
      * Match the given path with existing load balanced paths.
      *
      * @param path load balanced path