[ONOS-4715] Port chain delete issue fix

Change-Id: I8330367710212be1432c13534f69be96f80637bd

@@ -64,4 +64,15 @@ public interface SfcFlowRuleInstallerService {
      */
     ConnectPoint unInstallLoadBalancedFlowRules(PortChain portChain, FiveTuple fiveTuple,
             NshServicePathId nshSpiId);
+
+    /**
+     * Uninstall load balanced classifier rules.
+     *
+     * @param portChain port-chain
+     * @param fiveTuple five tuple packet information
+     * @param nshSpiId service path index identifier
+     * @return connectPoint the network identifier
+     */
+    ConnectPoint unInstallLoadBalancedClassifierRules(PortChain portChain, FiveTuple fiveTuple,
+            NshServicePathId nshSpiId);
 }

@@ -218,6 +218,20 @@ public class SfcFlowRuleInstallerImpl implements SfcFlowRuleInstallerService {
         return installSfcFlowRules(portChain, fiveTuple, nshSpiId, Objective.Operation.REMOVE);
     }
 
+    @Override
+    public ConnectPoint unInstallLoadBalancedClassifierRules(PortChain portChain, FiveTuple fiveTuple,
+            NshServicePathId nshSpiId) {
+        checkNotNull(portChain, PORT_CHAIN_NOT_NULL);
+
+        List<PortPairId> portPairs = portChain.getLoadBalancePath(fiveTuple);
+        // Get the first port pair
+        ListIterator<PortPairId> portPairListIterator = portPairs.listIterator();
+        PortPairId portPairId = portPairListIterator.next();
+        PortPair portPair = portPairService.getPortPair(portPairId);
+
+        return installSfcClassifierRules(portChain, portPair, nshSpiId, fiveTuple, Objective.Operation.REMOVE);
+    }
+
     public ConnectPoint installSfcFlowRules(PortChain portChain, FiveTuple fiveTuple, NshServicePathId nshSpiId,
             Objective.Operation type) {
         checkNotNull(portChain, PORT_CHAIN_NOT_NULL);

@@ -316,13 +316,15 @@ public class SfcManager implements SfcService {
         Set<FiveTuple> fiveTupleSet = portChain.getLoadBalanceIdMapKeys();
         for (FiveTuple fiveTuple : fiveTupleSet) {
             id = portChain.getLoadBalanceId(fiveTuple);
+            nshSpi = NshServicePathId.of(getNshServicePathId(id, nshSpiId));
             if (processedIdList.contains(id)) {
-                // multiple five tuple can have single path.
+                // Multiple five tuple can have single path. In this case only
+                // the classifier rule need to delete
+                flowRuleInstaller.unInstallLoadBalancedClassifierRules(portChain, fiveTuple, nshSpi);
                 continue;
             } else {
                 processedIdList.add(id);
             }
-            nshSpi = NshServicePathId.of(getNshServicePathId(id, nshSpiId));
             flowRuleInstaller.unInstallLoadBalancedFlowRules(portChain, fiveTuple, nshSpi);
         }