Do not use JdkFutureAdapters
[openflowplugin.git] / applications / forwardingrules-manager / src / main / java / org / opendaylight / openflowplugin / applications / frm / impl / FlowNodeReconciliationImpl.java
index bde8214ca80d77d6671eaf32ba1853e32da24efd..ded654f3e7a062c9aab1f1056e79b51187790ec4 100644 (file)
@@ -1,22 +1,25 @@
-/**
+/*
  * Copyright (c) 2014, 2017 Cisco Systems, Inc. and others.  All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
  * and is available at http://www.eclipse.org/legal/epl-v10.html
  */
-
 package org.opendaylight.openflowplugin.applications.frm.impl;
 
-import com.google.common.base.Optional;
-import com.google.common.base.Preconditions;
-import com.google.common.collect.Lists;
+import static java.util.Objects.requireNonNull;
+import static org.opendaylight.openflowplugin.api.openflow.ReconciliationState.ReconciliationStatus.COMPLETED;
+import static org.opendaylight.openflowplugin.api.openflow.ReconciliationState.ReconciliationStatus.FAILED;
+import static org.opendaylight.openflowplugin.api.openflow.ReconciliationState.ReconciliationStatus.STARTED;
+
+import com.google.common.util.concurrent.FluentFuture;
 import com.google.common.util.concurrent.FutureCallback;
 import com.google.common.util.concurrent.Futures;
-import com.google.common.util.concurrent.JdkFutureAdapters;
 import com.google.common.util.concurrent.ListenableFuture;
 import com.google.common.util.concurrent.MoreExecutors;
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
 import java.math.BigInteger;
+import java.time.LocalDateTime;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -24,21 +27,27 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.ListIterator;
 import java.util.Map;
+import java.util.Optional;
 import java.util.concurrent.Callable;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
+import java.util.concurrent.ThreadFactory;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
 import java.util.concurrent.atomic.AtomicLong;
-import org.opendaylight.controller.md.sal.binding.api.DataBroker;
-import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
-import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
-import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
+import org.opendaylight.mdsal.binding.api.DataBroker;
+import org.opendaylight.mdsal.binding.api.ReadTransaction;
+import org.opendaylight.mdsal.common.api.CommitInfo;
+import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
 import org.opendaylight.openflowplugin.api.OFConstants;
+import org.opendaylight.openflowplugin.api.openflow.FlowGroupCacheManager;
+import org.opendaylight.openflowplugin.api.openflow.ReconciliationState;
 import org.opendaylight.openflowplugin.api.openflow.device.DeviceInfo;
 import org.opendaylight.openflowplugin.applications.frm.FlowNodeReconciliation;
 import org.opendaylight.openflowplugin.applications.frm.ForwardingRulesManager;
+import org.opendaylight.openflowplugin.applications.frm.util.FrmUtil;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.action.types.rev131112.action.action.GroupActionCase;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.action.types.rev131112.action.action.OutputActionCase;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.action.types.rev131112.action.list.Action;
@@ -65,27 +74,19 @@ import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.group
 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.groups.GroupKey;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.groups.StaleGroup;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.groups.StaleGroupKey;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeRef;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.types.rev130918.MeterId;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.AddBundleMessagesInput;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.AddBundleMessagesInputBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.AddBundleMessagesOutput;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.ControlBundleInput;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.ControlBundleInputBuilder;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.ControlBundleOutput;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.SalBundleService;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.add.bundle.messages.input.Messages;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.add.bundle.messages.input.MessagesBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.add.bundle.messages.input.messages.Message;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.add.bundle.messages.input.messages.MessageBuilder;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.bundle.inner.message.grouping.bundle.inner.message.BundleAddFlowCaseBuilder;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.bundle.inner.message.grouping.bundle.inner.message.BundleAddGroupCaseBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.bundle.inner.message.grouping.bundle.inner.message.BundleRemoveFlowCaseBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.bundle.inner.message.grouping.bundle.inner.message.BundleRemoveGroupCaseBuilder;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.bundle.inner.message.grouping.bundle.inner.message.bundle.add.flow._case.AddFlowCaseDataBuilder;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.bundle.inner.message.grouping.bundle.inner.message.bundle.add.group._case.AddGroupCaseDataBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.bundle.inner.message.grouping.bundle.inner.message.bundle.remove.flow._case.RemoveFlowCaseDataBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.bundle.service.rev170124.bundle.inner.message.grouping.bundle.inner.message.bundle.remove.group._case.RemoveGroupCaseDataBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.onf.rev170124.BundleControlType;
@@ -97,6 +98,7 @@ import org.opendaylight.yang.gen.v1.urn.opendaylight.table.types.rev131026.table
 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
 import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
 import org.opendaylight.yangtools.yang.common.RpcResult;
+import org.opendaylight.yangtools.yang.common.Uint32;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -108,6 +110,7 @@ import org.slf4j.LoggerFactory;
 public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
 
     private static final Logger LOG = LoggerFactory.getLogger(FlowNodeReconciliationImpl.class);
+    private static final Logger OF_EVENT_LOG = LoggerFactory.getLogger("OfEventLog");
 
     // The number of nanoseconds to wait for a single group to be added.
     private static final long ADD_GROUP_TIMEOUT = TimeUnit.SECONDS.toNanos(3);
@@ -116,13 +119,17 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
     private static final long MAX_ADD_GROUP_TIMEOUT = TimeUnit.SECONDS.toNanos(20);
     private static final String SEPARATOR = ":";
     private static final int THREAD_POOL_SIZE = 4;
-
+    private static final ThreadFactory THREAD_FACTORY = new ThreadFactoryBuilder()
+            .setNameFormat("BundleResync-%d")
+            .setDaemon(false)
+            .setUncaughtExceptionHandler((thread, ex) -> LOG.error("Uncaught exception {}", thread, ex))
+            .build();
     private final DataBroker dataBroker;
     private final ForwardingRulesManager provider;
     private final String serviceName;
     private final int priority;
     private final ResultState resultState;
-    private final Map<DeviceInfo, ListenableFuture<Boolean>> futureMap = new HashMap<>();
+    private final Map<DeviceInfo, ListenableFuture<Boolean>> futureMap = new ConcurrentHashMap<>();
 
     private final ExecutorService executor = Executors.newFixedThreadPool(THREAD_POOL_SIZE);
 
@@ -130,16 +137,18 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
 
     private static final AtomicLong BUNDLE_ID = new AtomicLong();
     private static final BundleFlags BUNDLE_FLAGS = new BundleFlags(true, true);
+    private final Map<String, ReconciliationState> reconciliationStates;
 
     public FlowNodeReconciliationImpl(final ForwardingRulesManager manager, final DataBroker db,
-            final String serviceName, final int priority, final ResultState resultState) {
-        this.provider = Preconditions.checkNotNull(manager, "ForwardingRulesManager can not be null!");
-        dataBroker = Preconditions.checkNotNull(db, "DataBroker can not be null!");
+                                      final String serviceName, final int priority, final ResultState resultState,
+                                      final FlowGroupCacheManager flowGroupCacheManager) {
+        provider = requireNonNull(manager, "ForwardingRulesManager can not be null!");
+        dataBroker = requireNonNull(db, "DataBroker can not be null!");
         this.serviceName = serviceName;
         this.priority = priority;
         this.resultState = resultState;
-        salBundleService = Preconditions.checkNotNull(manager.getSalBundleService(),
-                "salBundleService can not be null!");
+        salBundleService = requireNonNull(manager.getSalBundleService(), "salBundleService can not be null!");
+        reconciliationStates = flowGroupCacheManager.getReconciliationStates();
     }
 
     @Override
@@ -150,20 +159,27 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
     }
 
     @Override
-    public ListenableFuture<Boolean> reconcileConfiguration(InstanceIdentifier<FlowCapableNode> connectedNode) {
+    public ListenableFuture<Boolean> reconcileConfiguration(final InstanceIdentifier<FlowCapableNode> connectedNode) {
         LOG.info("Triggering reconciliation for device {}", connectedNode.firstKeyOf(Node.class));
+        // Clearing the group registry cache for the connected node if exists
+        String nodeId = FrmUtil.getNodeIdValueFromNodeIdentifier(connectedNode);
+        provider.getDevicesGroupRegistry().clearNodeGroups(nodeId);
         if (provider.isStaleMarkingEnabled()) {
             LOG.info("Stale-Marking is ENABLED and proceeding with deletion of " + "stale-marked entities on switch {}",
-                    connectedNode.toString());
+                    connectedNode);
             reconciliationPreProcess(connectedNode);
         }
-        if (provider.isBundleBasedReconciliationEnabled()) {
-            BundleBasedReconciliationTask bundleBasedReconTask = new BundleBasedReconciliationTask(connectedNode);
-            return JdkFutureAdapters.listenInPoolThread(executor.submit(bundleBasedReconTask));
-        } else {
-            ReconciliationTask reconciliationTask = new ReconciliationTask(connectedNode);
-            return JdkFutureAdapters.listenInPoolThread(executor.submit(reconciliationTask));
-        }
+
+        return Futures.submit(provider.isBundleBasedReconciliationEnabled()
+            ? new BundleBasedReconciliationTask(connectedNode) : new ReconciliationTask(connectedNode), executor);
+    }
+
+    @Override
+    public void flowNodeDisconnected(final InstanceIdentifier<FlowCapableNode> disconnectedNode) {
+        final var node = disconnectedNode.firstKeyOf(Node.class).getId().getValue();
+        // FIXME: BigInteger.toString() called here
+        final var dpnId = getDpnIdFromNodeName(node);
+        reconciliationStates.remove(dpnId.toString());
     }
 
     private class BundleBasedReconciliationTask implements Callable<Boolean> {
@@ -176,89 +192,111 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
         @Override
         public Boolean call() {
             String node = nodeIdentity.firstKeyOf(Node.class).getId().getValue();
-            Optional<FlowCapableNode> flowNode = Optional.absent();
-            BundleId bundleIdValue = new BundleId(BUNDLE_ID.getAndIncrement());
+            Optional<FlowCapableNode> flowNode = Optional.empty();
+            BundleId bundleIdValue = new BundleId(Uint32.valueOf(BUNDLE_ID.getAndIncrement()));
             BigInteger dpnId = getDpnIdFromNodeName(node);
+            ExecutorService service = Executors.newSingleThreadExecutor(THREAD_FACTORY);
             LOG.info("Triggering bundle based reconciliation for device : {}", dpnId);
-            try (ReadOnlyTransaction trans = provider.getReadTransaction()) {
+            try (ReadTransaction trans = provider.getReadTransaction()) {
                 flowNode = trans.read(LogicalDatastoreType.CONFIGURATION, nodeIdentity).get();
             } catch (ExecutionException | InterruptedException e) {
                 LOG.error("Error occurred while reading the configuration data store for node {}", nodeIdentity, e);
             }
 
             if (flowNode.isPresent()) {
+                final var reconciliationState = new ReconciliationState(STARTED, LocalDateTime.now());
+                //put the dpn info into the map
+                reconciliationStates.put(dpnId.toString(), reconciliationState);
                 LOG.debug("FlowNode present for Datapath ID {}", dpnId);
-                final NodeRef nodeRef = new NodeRef(nodeIdentity.firstIdentifierOf(Node.class));
+                OF_EVENT_LOG.debug("Bundle Reconciliation Start, Node: {}", dpnId);
+                final var nodeRef = new NodeRef(nodeIdentity.firstIdentifierOf(Node.class));
 
-                final ControlBundleInput closeBundleInput = new ControlBundleInputBuilder().setNode(nodeRef)
+                final var closeBundleInput = new ControlBundleInputBuilder().setNode(nodeRef)
                         .setBundleId(bundleIdValue).setFlags(BUNDLE_FLAGS)
                         .setType(BundleControlType.ONFBCTCLOSEREQUEST).build();
 
-                final ControlBundleInput openBundleInput = new ControlBundleInputBuilder().setNode(nodeRef)
-                        .setBundleId(bundleIdValue).setFlags(BUNDLE_FLAGS).setType(BundleControlType.ONFBCTOPENREQUEST)
-                        .build();
+                final var openBundleInput = new ControlBundleInputBuilder().setNode(nodeRef)
+                        .setBundleId(bundleIdValue).setFlags(BUNDLE_FLAGS)
+                        .setType(BundleControlType.ONFBCTOPENREQUEST).build();
 
-                final ControlBundleInput commitBundleInput = new ControlBundleInputBuilder().setNode(nodeRef)
+                final var commitBundleInput = new ControlBundleInputBuilder().setNode(nodeRef)
                         .setBundleId(bundleIdValue).setFlags(BUNDLE_FLAGS)
                         .setType(BundleControlType.ONFBCTCOMMITREQUEST).build();
 
-                final AddBundleMessagesInput addBundleMessagesInput = new AddBundleMessagesInputBuilder()
+                final var deleteAllFlowGroupsInput = new AddBundleMessagesInputBuilder()
                         .setNode(nodeRef).setBundleId(bundleIdValue).setFlags(BUNDLE_FLAGS)
-                        .setMessages(createMessages(nodeRef, flowNode)).build();
+                        .setMessages(createMessages(nodeRef)).build();
 
+                LOG.debug("Closing openflow bundle for device {}", dpnId);
                 /* Close previously opened bundle on the openflow switch if any */
-                ListenableFuture<RpcResult<ControlBundleOutput>> closeBundle
-                        = salBundleService.controlBundle(closeBundleInput);
+                final var closeBundle = salBundleService.controlBundle(closeBundleInput);
 
                 /* Open a new bundle on the switch */
-                ListenableFuture<RpcResult<ControlBundleOutput>> openBundle =
-                        Futures.transformAsync(closeBundle,
-                            rpcResult -> salBundleService.controlBundle(openBundleInput),
-                            MoreExecutors.directExecutor());
+                final var openBundle = Futures.transformAsync(closeBundle, rpcResult -> {
+                    if (rpcResult.isSuccessful()) {
+                        LOG.debug("Existing bundle is successfully closed for device {}", dpnId);
+                    }
+                    return salBundleService.controlBundle(openBundleInput);
+                }, service);
 
                 /* Push groups and flows via bundle add messages */
-                ListenableFuture<RpcResult<AddBundleMessagesOutput>> addBundleMessagesFuture
-                        = Futures.transformAsync(openBundle, rpcResult -> {
-                            if (rpcResult.isSuccessful()) {
-                                return salBundleService.addBundleMessages(addBundleMessagesInput);
-                            }
-                            return Futures.immediateFuture(null);
-                        }, MoreExecutors.directExecutor());
+                final var deleteAllFlowGroupsFuture = Futures.transformAsync(openBundle, rpcResult -> {
+                    if (rpcResult.isSuccessful()) {
+                        LOG.debug("Open bundle is successful for device {}", dpnId);
+                        return salBundleService.addBundleMessages(deleteAllFlowGroupsInput);
+                    }
+                    return Futures.immediateFuture(null);
+                }, service);
+
+                /* Push flows and groups via bundle add messages */
+                final var finalFlowNode = flowNode;
+                final var addbundlesFuture = Futures.transformAsync(deleteAllFlowGroupsFuture, rpcResult -> {
+                    if (rpcResult.isSuccessful()) {
+                        LOG.debug("Adding delete all flow/group message is successful for device {}", dpnId);
+                        return Futures.allAsList(addBundleMessages(finalFlowNode.orElseThrow(), bundleIdValue,
+                            nodeIdentity));
+                    }
+                    return Futures.immediateFuture(null);
+                }, service);
 
                 /* Commit the bundle on the openflow switch */
-                ListenableFuture<RpcResult<ControlBundleOutput>> commitBundleFuture
-                        = Futures.transformAsync(addBundleMessagesFuture, rpcResult -> {
-                            if (rpcResult.isSuccessful()) {
-                                return salBundleService.controlBundle(commitBundleInput);
-                            }
-                            return Futures.immediateFuture(null);
-                        }, MoreExecutors.directExecutor());
+                final var commitBundleFuture = Futures.transformAsync(addbundlesFuture, rpcResult -> {
+                    LOG.debug("Adding bundle messages completed for device {}", dpnId);
+                    return salBundleService.controlBundle(commitBundleInput);
+                }, service);
 
                 /* Bundles not supported for meters */
-                List<Meter> meters = flowNode.get().getMeter() != null ? flowNode.get().getMeter()
-                        : Collections.emptyList();
+                final var meters = finalFlowNode.orElseThrow().nonnullMeter().values();
                 Futures.transformAsync(commitBundleFuture,
                     rpcResult -> {
                         if (rpcResult.isSuccessful()) {
-                            for (Meter meter : meters) {
-                                final KeyedInstanceIdentifier<Meter, MeterKey> meterIdent = nodeIdentity
-                                        .child(Meter.class, meter.key());
-                                provider.getMeterCommiter().add(meterIdent, meter, nodeIdentity);
+                            for (var meter : meters) {
+                                provider.getMeterCommiter().add(nodeIdentity.child(Meter.class, meter.key()), meter,
+                                    nodeIdentity);
                             }
                         }
                         return Futures.immediateFuture(null);
-                    }, MoreExecutors.directExecutor());
+                    }, service);
 
                 try {
-                    if (commitBundleFuture.get().isSuccessful()) {
+                    final var bundleFuture = commitBundleFuture.get();
+                    if (bundleFuture != null && bundleFuture.isSuccessful()) {
+                        reconciliationState.setState(COMPLETED, LocalDateTime.now());
                         LOG.debug("Completing bundle based reconciliation for device ID:{}", dpnId);
+                        OF_EVENT_LOG.debug("Bundle Reconciliation Finish, Node: {}", dpnId);
                         return true;
                     } else {
+                        reconciliationState.setState(FAILED, LocalDateTime.now());
+                        LOG.error("commit bundle failed for device {} with error {}", dpnId,
+                                commitBundleFuture.get().getErrors());
                         return false;
                     }
                 } catch (InterruptedException | ExecutionException e) {
-                    LOG.error("Error while doing bundle based reconciliation for device ID:{}", nodeIdentity);
+                    reconciliationState.setState(FAILED, LocalDateTime.now());
+                    LOG.error("Error while doing bundle based reconciliation for device ID:{}", dpnId, e);
                     return false;
+                } finally {
+                    service.shutdown();
                 }
             }
             LOG.error("FlowNode not present for Datapath ID {}", dpnId);
@@ -267,18 +305,21 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
     }
 
     @Override
-    public ListenableFuture<Boolean> startReconciliation(DeviceInfo node) {
+    public ListenableFuture<Boolean> startReconciliation(final DeviceInfo node) {
         InstanceIdentifier<FlowCapableNode> connectedNode = node.getNodeInstanceIdentifier()
                 .augmentation(FlowCapableNode.class);
         // Clearing the group registry cache for the connected node if exists
-        provider.getDevicesGroupRegistry().clearNodeGroups(node.getNodeId());
+        provider.getDevicesGroupRegistry().clearNodeGroups(node.toString());
         return futureMap.computeIfAbsent(node, future -> reconcileConfiguration(connectedNode));
     }
 
     @Override
-    public ListenableFuture<Boolean> endReconciliation(DeviceInfo node) {
-        futureMap.computeIfPresent(node, (key, future) -> future).cancel(true);
-        futureMap.remove(node);
+    public ListenableFuture<Boolean> endReconciliation(final DeviceInfo node) {
+        ListenableFuture<Boolean> listenableFuture = futureMap.computeIfPresent(node, (key, future) -> future);
+        if (listenableFuture != null) {
+            listenableFuture.cancel(true);
+            futureMap.remove(node);
+        }
         return Futures.immediateFuture(true);
     }
 
@@ -309,24 +350,28 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
         public Boolean call() {
             String node = nodeIdentity.firstKeyOf(Node.class).getId().getValue();
             BigInteger dpnId = getDpnIdFromNodeName(node);
+            OF_EVENT_LOG.debug("Reconciliation Start, Node: {}", dpnId);
 
-            Optional<FlowCapableNode> flowNode;
+            Optional<FlowCapableNode> optFlowNode;
             // initialize the counter
             int counter = 0;
-            try (ReadOnlyTransaction trans = provider.getReadTransaction()) {
-                flowNode = trans.read(LogicalDatastoreType.CONFIGURATION, nodeIdentity).get();
+            try (ReadTransaction trans = provider.getReadTransaction()) {
+                optFlowNode = trans.read(LogicalDatastoreType.CONFIGURATION, nodeIdentity).get();
             } catch (ExecutionException | InterruptedException e) {
                 LOG.warn("Fail with read Config/DS for Node {} !", nodeIdentity, e);
                 return false;
             }
 
-            if (flowNode.isPresent()) {
+            if (optFlowNode.isPresent()) {
                 /* Tables - have to be pushed before groups */
                 // CHECK if while pushing the update, updateTableInput can be null to emulate a
                 // table add
-                List<TableFeatures> tableList = flowNode.get().getTableFeatures() != null
-                        ? flowNode.get().getTableFeatures()
-                        : Collections.<TableFeatures>emptyList();
+                ReconciliationState reconciliationState = new ReconciliationState(STARTED, LocalDateTime.now());
+                //put the dpn info into the map
+                reconciliationStates.put(dpnId.toString(), reconciliationState);
+                LOG.debug("Triggering reconciliation for node {} with state: {}", dpnId, STARTED);
+                FlowCapableNode flowNode = optFlowNode.orElseThrow();
+                Collection<TableFeatures> tableList = flowNode.nonnullTableFeatures().values();
                 for (TableFeatures tableFeaturesItem : tableList) {
                     TableFeaturesKey tableKey = tableFeaturesItem.key();
                     KeyedInstanceIdentifier<TableFeatures, TableFeaturesKey> tableFeaturesII = nodeIdentity
@@ -335,14 +380,11 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
                 }
 
                 /* Groups - have to be first */
-                List<Group> groups = flowNode.get().getGroup() != null ? flowNode.get().getGroup()
-                        : Collections.<Group>emptyList();
-                List<Group> toBeInstalledGroups = new ArrayList<>();
-                toBeInstalledGroups.addAll(groups);
+                List<Group> toBeInstalledGroups = new ArrayList<>(flowNode.nonnullGroup().values());
                 // new list for suspected groups pointing to ports .. when the ports come up
                 // late
                 List<Group> suspectedGroups = new ArrayList<>();
-                Map<Long, ListenableFuture<?>> groupFutures = new HashMap<>();
+                Map<Uint32, ListenableFuture<?>> groupFutures = new HashMap<>();
 
                 while ((!toBeInstalledGroups.isEmpty() || !suspectedGroups.isEmpty())
                         && counter <= provider.getReconciliationRetryCount()) { // also check if the counter has not
@@ -350,7 +392,7 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
 
                     if (toBeInstalledGroups.isEmpty() && !suspectedGroups.isEmpty()) {
                         LOG.debug("These Groups are pointing to node-connectors that are not up yet {}",
-                                suspectedGroups.toString());
+                                suspectedGroups);
                         toBeInstalledGroups.addAll(suspectedGroups);
                         break;
                     }
@@ -360,18 +402,18 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
                         Group group = iterator.next();
                         boolean okToInstall = true;
                         Buckets buckets = group.getBuckets();
-                        List<Bucket> bucketList = buckets == null ? null : buckets.getBucket();
+                        Collection<Bucket> bucketList = buckets == null ? null : buckets.nonnullBucket().values();
                         if (bucketList == null) {
                             bucketList = Collections.<Bucket>emptyList();
                         }
                         for (Bucket bucket : bucketList) {
-                            List<Action> actions = bucket.getAction();
+                            Collection<Action> actions = bucket.nonnullAction().values();
                             if (actions == null) {
                                 actions = Collections.<Action>emptyList();
                             }
                             for (Action action : actions) {
                                 // chained-port
-                                if (action.getAction().getImplementedInterface().getName()
+                                if (action.getAction().implementedInterface().getName()
                                         .equals("org.opendaylight.yang.gen.v1.urn.opendaylight"
                                                 + ".action.types.rev131112.action.action.OutputActionCase")) {
                                     String nodeConnectorUri = ((OutputActionCase) action.getAction()).getOutputAction()
@@ -392,14 +434,15 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
                                         LOG.debug(
                                                 "Not yet received the node-connector updated for {} "
                                                         + "for the group with id {}",
-                                                nodeConnectorUri, group.getGroupId().toString());
+                                                nodeConnectorUri, group.getGroupId());
                                         break;
                                     }
-                                } else if (action.getAction().getImplementedInterface().getName()
+                                } else if (action.getAction().implementedInterface().getName()
                                         .equals("org.opendaylight.yang.gen.v1.urn.opendaylight"
                                                 + ".action.types.rev131112.action.action.GroupActionCase")) {
                                     // chained groups
-                                    Long groupId = ((GroupActionCase) action.getAction()).getGroupAction().getGroupId();
+                                    Uint32 groupId = ((GroupActionCase) action.getAction()).getGroupAction()
+                                            .getGroupId();
                                     ListenableFuture<?> future = groupFutures.get(groupId);
                                     if (future == null) {
                                         okToInstall = false;
@@ -429,15 +472,13 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
                 if (!toBeInstalledGroups.isEmpty()) {
                     for (Group group : toBeInstalledGroups) {
                         LOG.debug(
-                                "Installing the group {} finally although "
-                                        + "the port is not up after checking for {} times ",
-                                group.getGroupId().toString(), provider.getReconciliationRetryCount());
+                            "Installing the group {} finally although the port is not up after checking for {} times ",
+                            group.getGroupId(), provider.getReconciliationRetryCount());
                         addGroup(groupFutures, group);
                     }
                 }
                 /* Meters */
-                List<Meter> meters = flowNode.get().getMeter() != null ? flowNode.get().getMeter()
-                        : Collections.<Meter>emptyList();
+                Collection<Meter> meters = flowNode.nonnullMeter().values();
                 for (Meter meter : meters) {
                     final KeyedInstanceIdentifier<Meter, MeterKey> meterIdent = nodeIdentity.child(Meter.class,
                             meter.key());
@@ -449,18 +490,20 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
                 awaitGroups(node, groupFutures.values());
 
                 /* Flows */
-                List<Table> tables = flowNode.get().getTable() != null ? flowNode.get().getTable()
-                        : Collections.<Table>emptyList();
-                for (Table table : tables) {
+                int flowCount = 0;
+                for (Table table : flowNode.nonnullTable().values()) {
                     final KeyedInstanceIdentifier<Table, TableKey> tableIdent = nodeIdentity.child(Table.class,
                             table.key());
-                    List<Flow> flows = table.getFlow() != null ? table.getFlow() : Collections.<Flow>emptyList();
+                    Collection<Flow> flows = table.nonnullFlow().values();
+                    flowCount += flows.size();
                     for (Flow flow : flows) {
                         final KeyedInstanceIdentifier<Flow, FlowKey> flowIdent = tableIdent.child(Flow.class,
                                 flow.key());
                         provider.getFlowCommiter().add(flowIdent, flow, nodeIdentity);
                     }
                 }
+                reconciliationState.setState(COMPLETED, LocalDateTime.now());
+                OF_EVENT_LOG.debug("Reconciliation Finish, Node: {}, flow count: {}", dpnId, flowCount);
             }
             return true;
         }
@@ -474,15 +517,14 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
          * @param group
          *            The group to add.
          */
-        private void addGroup(Map<Long, ListenableFuture<?>> map, Group group) {
+        private void addGroup(final Map<Uint32, ListenableFuture<?>> map, final Group group) {
             KeyedInstanceIdentifier<Group, GroupKey> groupIdent = nodeIdentity.child(Group.class, group.key());
-            final Long groupId = group.getGroupId().getValue();
-            ListenableFuture<?> future = JdkFutureAdapters
-                    .listenInPoolThread(provider.getGroupCommiter().add(groupIdent, group, nodeIdentity));
+            final Uint32 groupId = group.getGroupId().getValue();
+            final var future = provider.getGroupCommiter().add(groupIdent, group, nodeIdentity);
 
-            Futures.addCallback(future, new FutureCallback<Object>() {
+            Futures.addCallback(future, new FutureCallback<RpcResult<?>>() {
                 @Override
-                public void onSuccess(Object result) {
+                public void onSuccess(final RpcResult<?> result) {
                     if (LOG.isTraceEnabled()) {
                         LOG.trace("add-group RPC completed: node={}, id={}",
                                 nodeIdentity.firstKeyOf(Node.class).getId().getValue(), groupId);
@@ -490,7 +532,7 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
                 }
 
                 @Override
-                public void onFailure(Throwable cause) {
+                public void onFailure(final Throwable cause) {
                     LOG.debug("add-group RPC failed: node={}, id={}",
                             nodeIdentity.firstKeyOf(Node.class).getId().getValue(), groupId, cause);
                 }
@@ -508,7 +550,7 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
          *            Future associated with add-group RPC that installs the target
          *            group.
          */
-        private void awaitGroup(String nodeId, ListenableFuture<?> future) {
+        private void awaitGroup(final String nodeId, final ListenableFuture<?> future) {
             awaitGroups(nodeId, Collections.singleton(future));
         }
 
@@ -520,7 +562,7 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
          * @param futures
          *            A collection of futures associated with add-group RPCs.
          */
-        private void awaitGroups(String nodeId, Collection<ListenableFuture<?>> futures) {
+        private void awaitGroups(final String nodeId, final Collection<ListenableFuture<?>> futures) {
             if (!futures.isEmpty()) {
                 long timeout = Math.min(ADD_GROUP_TIMEOUT * futures.size(), MAX_ADD_GROUP_TIMEOUT);
                 try {
@@ -533,37 +575,34 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
         }
     }
 
-    private BigInteger getDpnIdFromNodeName(String nodeName) {
-
+    private static BigInteger getDpnIdFromNodeName(final String nodeName) {
         String dpId = nodeName.substring(nodeName.lastIndexOf(SEPARATOR) + 1);
         return new BigInteger(dpId);
     }
 
     private void reconciliationPreProcess(final InstanceIdentifier<FlowCapableNode> nodeIdent) {
-        List<InstanceIdentifier<StaleFlow>> staleFlowsToBeBulkDeleted = Lists.newArrayList();
-        List<InstanceIdentifier<StaleGroup>> staleGroupsToBeBulkDeleted = Lists.newArrayList();
-        List<InstanceIdentifier<StaleMeter>> staleMetersToBeBulkDeleted = Lists.newArrayList();
+        List<InstanceIdentifier<StaleFlow>> staleFlowsToBeBulkDeleted = new ArrayList<>();
+        List<InstanceIdentifier<StaleGroup>> staleGroupsToBeBulkDeleted = new ArrayList<>();
+        List<InstanceIdentifier<StaleMeter>> staleMetersToBeBulkDeleted = new ArrayList<>();
 
-        Optional<FlowCapableNode> flowNode = Optional.absent();
+        Optional<FlowCapableNode> optFlowNode = Optional.empty();
 
-        try (ReadOnlyTransaction trans = provider.getReadTransaction()) {
-            flowNode = trans.read(LogicalDatastoreType.CONFIGURATION, nodeIdent).get();
+        try (ReadTransaction trans = provider.getReadTransaction()) {
+            optFlowNode = trans.read(LogicalDatastoreType.CONFIGURATION, nodeIdent).get();
         } catch (ExecutionException | InterruptedException e) {
             LOG.warn("Reconciliation Pre-Processing Fail with read Config/DS for Node {} !", nodeIdent, e);
         }
 
-        if (flowNode.isPresent()) {
-
+        if (optFlowNode.isPresent()) {
+            final FlowCapableNode flowNode = optFlowNode.orElseThrow();
             LOG.debug("Proceeding with deletion of stale-marked Flows on switch {} using Openflow interface",
-                    nodeIdent.toString());
+                    nodeIdent);
             /* Stale-Flows - Stale-marked Flows have to be removed first for safety */
-            List<Table> tables = flowNode.get().getTable() != null ? flowNode.get().getTable()
-                    : Collections.<Table>emptyList();
+            Collection<Table> tables = flowNode.nonnullTable().values();
             for (Table table : tables) {
                 final KeyedInstanceIdentifier<Table, TableKey> tableIdent = nodeIdent.child(Table.class,
                         table.key());
-                List<StaleFlow> staleFlows = table.getStaleFlow() != null ? table.getStaleFlow()
-                        : Collections.<StaleFlow>emptyList();
+                Collection<StaleFlow> staleFlows = table.nonnullStaleFlow().values();
                 for (StaleFlow staleFlow : staleFlows) {
 
                     FlowBuilder flowBuilder = new FlowBuilder(staleFlow);
@@ -572,42 +611,36 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
                     final KeyedInstanceIdentifier<Flow, FlowKey> flowIdent = tableIdent.child(Flow.class,
                             toBeDeletedFlow.key());
 
-                    this.provider.getFlowCommiter().remove(flowIdent, toBeDeletedFlow, nodeIdent);
+                    provider.getFlowCommiter().remove(flowIdent, toBeDeletedFlow, nodeIdent);
 
                     staleFlowsToBeBulkDeleted.add(getStaleFlowInstanceIdentifier(staleFlow, nodeIdent));
                 }
             }
 
             LOG.debug("Proceeding with deletion of stale-marked Groups for switch {} using Openflow interface",
-                    nodeIdent.toString());
+                    nodeIdent);
 
             // TODO: Should we collate the futures of RPC-calls to be sure that groups are
             // Flows are fully deleted
             // before attempting to delete groups - just in case there are references
 
             /* Stale-marked Groups - Can be deleted after flows */
-            List<StaleGroup> staleGroups = flowNode.get().getStaleGroup() != null ? flowNode.get().getStaleGroup()
-                    : Collections.<StaleGroup>emptyList();
-            for (StaleGroup staleGroup : staleGroups) {
-
+            for (StaleGroup staleGroup : flowNode.nonnullStaleGroup().values()) {
                 GroupBuilder groupBuilder = new GroupBuilder(staleGroup);
                 Group toBeDeletedGroup = groupBuilder.setGroupId(staleGroup.getGroupId()).build();
 
                 final KeyedInstanceIdentifier<Group, GroupKey> groupIdent = nodeIdent.child(Group.class,
                         toBeDeletedGroup.key());
 
-                this.provider.getGroupCommiter().remove(groupIdent, toBeDeletedGroup, nodeIdent);
+                provider.getGroupCommiter().remove(groupIdent, toBeDeletedGroup, nodeIdent);
 
                 staleGroupsToBeBulkDeleted.add(getStaleGroupInstanceIdentifier(staleGroup, nodeIdent));
             }
 
             LOG.debug("Proceeding with deletion of stale-marked Meters for switch {} using Openflow interface",
-                    nodeIdent.toString());
+                    nodeIdent);
             /* Stale-marked Meters - can be deleted anytime - so least priority */
-            List<StaleMeter> staleMeters = flowNode.get().getStaleMeter() != null ? flowNode.get().getStaleMeter()
-                    : Collections.<StaleMeter>emptyList();
-
-            for (StaleMeter staleMeter : staleMeters) {
+            for (StaleMeter staleMeter : flowNode.nonnullStaleMeter().values()) {
 
                 MeterBuilder meterBuilder = new MeterBuilder(staleMeter);
                 Meter toBeDeletedMeter = meterBuilder.setMeterId(staleMeter.getMeterId()).build();
@@ -615,7 +648,7 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
                 final KeyedInstanceIdentifier<Meter, MeterKey> meterIdent = nodeIdent.child(Meter.class,
                         toBeDeletedMeter.key());
 
-                this.provider.getMeterCommiter().remove(meterIdent, toBeDeletedMeter, nodeIdent);
+                provider.getMeterCommiter().remove(meterIdent, toBeDeletedMeter, nodeIdent);
 
                 staleMetersToBeBulkDeleted.add(getStaleMeterInstanceIdentifier(staleMeter, nodeIdent));
             }
@@ -623,94 +656,103 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
         }
 
         LOG.debug("Deleting all stale-marked flows/groups/meters of for switch {} in Configuration DS",
-                nodeIdent.toString());
+                nodeIdent);
         // Now, do the bulk deletions
         deleteDSStaleFlows(staleFlowsToBeBulkDeleted);
         deleteDSStaleGroups(staleGroupsToBeBulkDeleted);
         deleteDSStaleMeters(staleMetersToBeBulkDeleted);
     }
 
-    private void deleteDSStaleFlows(List<InstanceIdentifier<StaleFlow>> flowsForBulkDelete) {
-        WriteTransaction writeTransaction = dataBroker.newWriteOnlyTransaction();
-
-        for (InstanceIdentifier<StaleFlow> staleFlowIId : flowsForBulkDelete) {
+    private void deleteDSStaleFlows(final List<InstanceIdentifier<StaleFlow>> flowsForBulkDelete) {
+        final var writeTransaction = dataBroker.newWriteOnlyTransaction();
+        for (var staleFlowIId : flowsForBulkDelete) {
             writeTransaction.delete(LogicalDatastoreType.CONFIGURATION, staleFlowIId);
         }
-
-        ListenableFuture<Void> submitFuture = writeTransaction.submit();
-        handleStaleEntityDeletionResultFuture(submitFuture);
+        handleStaleEntityDeletionResultFuture(writeTransaction.commit());
     }
 
-    private void deleteDSStaleGroups(List<InstanceIdentifier<StaleGroup>> groupsForBulkDelete) {
-        WriteTransaction writeTransaction = dataBroker.newWriteOnlyTransaction();
-
-        for (InstanceIdentifier<StaleGroup> staleGroupIId : groupsForBulkDelete) {
+    private void deleteDSStaleGroups(final List<InstanceIdentifier<StaleGroup>> groupsForBulkDelete) {
+        final var writeTransaction = dataBroker.newWriteOnlyTransaction();
+        for (var staleGroupIId : groupsForBulkDelete) {
             writeTransaction.delete(LogicalDatastoreType.CONFIGURATION, staleGroupIId);
         }
-
-        ListenableFuture<Void> submitFuture = writeTransaction.submit();
-        handleStaleEntityDeletionResultFuture(submitFuture);
+        handleStaleEntityDeletionResultFuture(writeTransaction.commit());
     }
 
-    private void deleteDSStaleMeters(List<InstanceIdentifier<StaleMeter>> metersForBulkDelete) {
-        WriteTransaction writeTransaction = dataBroker.newWriteOnlyTransaction();
-
-        for (InstanceIdentifier<StaleMeter> staleMeterIId : metersForBulkDelete) {
+    private void deleteDSStaleMeters(final List<InstanceIdentifier<StaleMeter>> metersForBulkDelete) {
+        final var writeTransaction = dataBroker.newWriteOnlyTransaction();
+        for (var staleMeterIId : metersForBulkDelete) {
             writeTransaction.delete(LogicalDatastoreType.CONFIGURATION, staleMeterIId);
         }
-
-        ListenableFuture<Void> submitFuture = writeTransaction.submit();
-        handleStaleEntityDeletionResultFuture(submitFuture);
+        handleStaleEntityDeletionResultFuture(writeTransaction.commit());
     }
 
-    private InstanceIdentifier<org.opendaylight.yang.gen.v1.urn.opendaylight
+    private static InstanceIdentifier<org.opendaylight.yang.gen.v1.urn.opendaylight
         .flow.inventory.rev130819.tables.table.StaleFlow> getStaleFlowInstanceIdentifier(
-            StaleFlow staleFlow, InstanceIdentifier<FlowCapableNode> nodeIdent) {
+            final StaleFlow staleFlow, final InstanceIdentifier<FlowCapableNode> nodeIdent) {
         return nodeIdent.child(Table.class, new TableKey(staleFlow.getTableId())).child(
                 org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.StaleFlow.class,
                 new StaleFlowKey(new FlowId(staleFlow.getId())));
     }
 
-    private InstanceIdentifier<org.opendaylight.yang.gen.v1.urn.opendaylight
+    private static InstanceIdentifier<org.opendaylight.yang.gen.v1.urn.opendaylight
         .group.types.rev131018.groups.StaleGroup> getStaleGroupInstanceIdentifier(
-            StaleGroup staleGroup, InstanceIdentifier<FlowCapableNode> nodeIdent) {
+            final StaleGroup staleGroup, final InstanceIdentifier<FlowCapableNode> nodeIdent) {
         return nodeIdent.child(StaleGroup.class, new StaleGroupKey(new GroupId(staleGroup.getGroupId())));
     }
 
-    private InstanceIdentifier<org.opendaylight.yang.gen.v1.urn.opendaylight
+    private static InstanceIdentifier<org.opendaylight.yang.gen.v1.urn.opendaylight
         .flow.inventory.rev130819.meters.StaleMeter> getStaleMeterInstanceIdentifier(
-            StaleMeter staleMeter, InstanceIdentifier<FlowCapableNode> nodeIdent) {
+            final StaleMeter staleMeter, final InstanceIdentifier<FlowCapableNode> nodeIdent) {
         return nodeIdent.child(StaleMeter.class, new StaleMeterKey(new MeterId(staleMeter.getMeterId())));
     }
 
-    private void handleStaleEntityDeletionResultFuture(ListenableFuture<Void> submitFuture) {
-        Futures.addCallback(submitFuture, new FutureCallback<Void>() {
+    private List<ListenableFuture<RpcResult<AddBundleMessagesOutput>>> addBundleMessages(final FlowCapableNode flowNode,
+                                                         final BundleId bundleIdValue,
+                                                         final InstanceIdentifier<FlowCapableNode> nodeIdentity) {
+        List<ListenableFuture<RpcResult<AddBundleMessagesOutput>>> futureList = new ArrayList<>();
+        for (Group group : flowNode.nonnullGroup().values()) {
+            final KeyedInstanceIdentifier<Group, GroupKey> groupIdent = nodeIdentity.child(Group.class, group.key());
+            futureList.add(provider.getBundleGroupListener().add(groupIdent, group, nodeIdentity, bundleIdValue));
+        }
+
+        for (Table table : flowNode.nonnullTable().values()) {
+            final KeyedInstanceIdentifier<Table, TableKey> tableIdent = nodeIdentity.child(Table.class, table.key());
+            for (Flow flow : table.nonnullFlow().values()) {
+                final KeyedInstanceIdentifier<Flow, FlowKey> flowIdent = tableIdent.child(Flow.class, flow.key());
+                futureList.add(provider.getBundleFlowListener().add(flowIdent, flow, nodeIdentity, bundleIdValue));
+            }
+        }
+        OF_EVENT_LOG.debug("Flow/Group count is {}", futureList.size());
+        return futureList;
+    }
+
+    private static void handleStaleEntityDeletionResultFuture(final FluentFuture<? extends CommitInfo> submitFuture) {
+        submitFuture.addCallback(new FutureCallback<CommitInfo>() {
             @Override
-            public void onSuccess(Void result) {
+            public void onSuccess(final CommitInfo result) {
                 LOG.debug("Stale entity removal success");
             }
 
             @Override
-            public void onFailure(Throwable throwable) {
-                LOG.debug("Stale entity removal failed {}", throwable);
+            public void onFailure(final Throwable throwable) {
+                LOG.debug("Stale entity removal failed", throwable);
             }
         }, MoreExecutors.directExecutor());
     }
 
-    private Flow getDeleteAllFlow() {
-        final FlowBuilder flowBuilder = new FlowBuilder();
-        flowBuilder.setTableId(OFConstants.OFPTT_ALL);
-        return flowBuilder.build();
+    private static Flow getDeleteAllFlow() {
+        return new FlowBuilder().setTableId(OFConstants.OFPTT_ALL).build();
     }
 
-    private Group getDeleteAllGroup() {
-        final GroupBuilder groupBuilder = new GroupBuilder();
-        groupBuilder.setGroupType(GroupTypes.GroupAll);
-        groupBuilder.setGroupId(new GroupId(OFConstants.OFPG_ALL));
-        return groupBuilder.build();
+    private static Group getDeleteAllGroup() {
+        return new GroupBuilder()
+                .setGroupType(GroupTypes.GroupAll)
+                .setGroupId(new GroupId(OFConstants.OFPG_ALL))
+                .build();
     }
 
-    private Messages createMessages(final NodeRef nodeRef, final Optional<FlowCapableNode> flowNode) {
+    private static Messages createMessages(final NodeRef nodeRef) {
         final List<Message> messages = new ArrayList<>();
         messages.add(new MessageBuilder().setNode(nodeRef)
                 .setBundleInnerMessage(new BundleRemoveFlowCaseBuilder()
@@ -721,29 +763,6 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
                 .setBundleInnerMessage(new BundleRemoveGroupCaseBuilder()
                         .setRemoveGroupCaseData(new RemoveGroupCaseDataBuilder(getDeleteAllGroup()).build()).build())
                 .build());
-
-        if (flowNode.get().getGroup() != null) {
-            for (Group gr : flowNode.get().getGroup()) {
-                NodeId nodeId = nodeRef.getValue().firstKeyOf(Node.class).getId();
-                provider.getDevicesGroupRegistry().storeGroup(nodeId,gr.getGroupId().getValue());
-                messages.add(new MessageBuilder().setNode(nodeRef).setBundleInnerMessage(new BundleAddGroupCaseBuilder()
-                        .setAddGroupCaseData(new AddGroupCaseDataBuilder(gr).build()).build()).build());
-            }
-        }
-
-        if (flowNode.get().getTable() != null) {
-            for (Table table : flowNode.get().getTable()) {
-                for (Flow flow : table.getFlow()) {
-                    messages.add(
-                            new MessageBuilder().setNode(nodeRef)
-                                    .setBundleInnerMessage(new BundleAddFlowCaseBuilder()
-                                            .setAddFlowCaseData(new AddFlowCaseDataBuilder(flow).build()).build())
-                                    .build());
-                }
-            }
-        }
-
-        LOG.debug("The size of the flows and group messages created in createMessage() {}", messages.size());
         return new MessagesBuilder().setMessage(messages).build();
     }
 }