Bump MRI upstreams
[openflowplugin.git] / applications / forwardingrules-manager / src / main / java / org / opendaylight / openflowplugin / applications / frm / impl / FlowNodeReconciliationImpl.java
index a3b920f4d841e7378c339085869a6de13cf4053d..f9d2378e309891bdc59db42492e4d463698bb59d 100644 (file)
@@ -7,8 +7,11 @@
  */
 package org.opendaylight.openflowplugin.applications.frm.impl;
 
-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;
@@ -16,8 +19,8 @@ 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 edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 import java.math.BigInteger;
+import java.time.LocalDateTime;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -40,6 +43,8 @@ import org.opendaylight.mdsal.binding.api.ReadTransaction;
 import org.opendaylight.mdsal.binding.api.WriteTransaction;
 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;
@@ -136,16 +141,18 @@ 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) {
+        this.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
@@ -156,7 +163,7 @@ 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);
@@ -175,6 +182,13 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
         }
     }
 
+    @Override
+    public void flowNodeDisconnected(final InstanceIdentifier<FlowCapableNode> disconnectedNode) {
+        String node = disconnectedNode.firstKeyOf(Node.class).getId().getValue();
+        BigInteger dpnId = getDpnIdFromNodeName(node);
+        reconciliationStates.remove(dpnId.toString());
+    }
+
     private class BundleBasedReconciliationTask implements Callable<Boolean> {
         final InstanceIdentifier<FlowCapableNode> nodeIdentity;
 
@@ -186,7 +200,7 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
         public Boolean call() {
             String node = nodeIdentity.firstKeyOf(Node.class).getId().getValue();
             Optional<FlowCapableNode> flowNode = Optional.empty();
-            BundleId bundleIdValue = new BundleId(BUNDLE_ID.getAndIncrement());
+            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);
@@ -195,107 +209,116 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
             } catch (ExecutionException | InterruptedException e) {
                 LOG.error("Error occurred while reading the configuration data store for node {}", nodeIdentity, e);
             }
-            try {
-                if (flowNode.isPresent()) {
-                    LOG.debug("FlowNode present for Datapath ID {}", dpnId);
-                    OF_EVENT_LOG.debug("Bundle Reconciliation Start, Node: {}", dpnId);
-                    final NodeRef nodeRef = new NodeRef(nodeIdentity.firstIdentifierOf(Node.class));
-
-                    final ControlBundleInput 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 ControlBundleInput commitBundleInput = new ControlBundleInputBuilder().setNode(nodeRef)
-                            .setBundleId(bundleIdValue).setFlags(BUNDLE_FLAGS)
-                            .setType(BundleControlType.ONFBCTCOMMITREQUEST).build();
-
-                    final AddBundleMessagesInput deleteAllFlowGroupsInput = new AddBundleMessagesInputBuilder()
-                            .setNode(nodeRef).setBundleId(bundleIdValue).setFlags(BUNDLE_FLAGS)
-                            .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);
-
-                    /* Open a new bundle on the switch */
-                    ListenableFuture<RpcResult<ControlBundleOutput>> openBundle =
-                        Futures.transformAsync(closeBundle,
-                            rpcResult -> salBundleService.controlBundle(openBundleInput),
-                                service);
+
+            if (flowNode.isPresent()) {
+                ReconciliationState 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);
+                OF_EVENT_LOG.debug("Bundle Reconciliation Start, Node: {}", dpnId);
+                final NodeRef nodeRef = new NodeRef(nodeIdentity.firstIdentifierOf(Node.class));
+
+                final ControlBundleInput 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 ControlBundleInput commitBundleInput = new ControlBundleInputBuilder().setNode(nodeRef)
+                        .setBundleId(bundleIdValue).setFlags(BUNDLE_FLAGS)
+                        .setType(BundleControlType.ONFBCTCOMMITREQUEST).build();
+
+                final AddBundleMessagesInput deleteAllFlowGroupsInput = new AddBundleMessagesInputBuilder()
+                        .setNode(nodeRef).setBundleId(bundleIdValue).setFlags(BUNDLE_FLAGS)
+                        .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);
+
+                /* Open a new bundle on the switch */
+                ListenableFuture<RpcResult<ControlBundleOutput>> 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>> deleteAllFlowGroupsFuture
-                            = Futures.transformAsync(openBundle, rpcResult -> {
-                                if (rpcResult.isSuccessful()) {
-                                    return salBundleService.addBundleMessages(deleteAllFlowGroupsInput);
-                                }
-                                return Futures.immediateFuture(null);
-                            }, service);
-
-                    /* Push flows and groups via bundle add messages */
-                    Optional<FlowCapableNode> finalFlowNode = flowNode;
-                    ListenableFuture<List<RpcResult<AddBundleMessagesOutput>>> 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.get(), bundleIdValue,
-                                            nodeIdentity));
-                                }
-                                return Futures.immediateFuture(null);
-                            }, service);
+                ListenableFuture<RpcResult<AddBundleMessagesOutput>> 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 */
+                Optional<FlowCapableNode> finalFlowNode = flowNode;
+                ListenableFuture<List<RpcResult<AddBundleMessagesOutput>>> 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.get(), bundleIdValue,
+                                        nodeIdentity));
+                            }
+                            return Futures.immediateFuture(null);
+                        }, service);
 
                     /* Commit the bundle on the openflow switch */
-                    ListenableFuture<RpcResult<ControlBundleOutput>> commitBundleFuture = Futures.transformAsync(
-                            addbundlesFuture, rpcResult -> {
+                ListenableFuture<RpcResult<ControlBundleOutput>> 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();
-                    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);
-                                }
+                /* Bundles not supported for meters */
+                Collection<Meter> meters = flowNode.get().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);
                             }
-                            return Futures.immediateFuture(null);
-                        }, service);
-                    try {
-                        RpcResult<ControlBundleOutput> bundleFuture = commitBundleFuture.get();
-                        if (bundleFuture != null && bundleFuture.isSuccessful()) {
-                            LOG.debug("Completing bundle based reconciliation for device ID:{}", dpnId);
-                            OF_EVENT_LOG.debug("Bundle Reconciliation Finish, Node: {}", dpnId);
-                            return true;
-                        } else {
-                            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:{}", dpnId);
+                        return Futures.immediateFuture(null);
+                    }, service);
+                try {
+                    RpcResult<ControlBundleOutput> 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) {
+                    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);
-                return false;
-            }  finally {
-                service.shutdown();
             }
+            LOG.error("FlowNode not present for Datapath ID {}", dpnId);
+            return false;
         }
     }
 
     @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
@@ -304,7 +327,7 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
     }
 
     @Override
-    public ListenableFuture<Boolean> endReconciliation(DeviceInfo node) {
+    public ListenableFuture<Boolean> endReconciliation(final DeviceInfo node) {
         ListenableFuture<Boolean> listenableFuture = futureMap.computeIfPresent(node, (key, future) -> future);
         if (listenableFuture != null) {
             listenableFuture.cancel(true);
@@ -356,9 +379,12 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
                 /* 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);
+                Collection<TableFeatures> tableList = flowNode.get().nonnullTableFeatures().values();
                 for (TableFeatures tableFeaturesItem : tableList) {
                     TableFeaturesKey tableKey = tableFeaturesItem.key();
                     KeyedInstanceIdentifier<TableFeatures, TableFeaturesKey> tableFeaturesII = nodeIdentity
@@ -367,8 +393,7 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
                 }
 
                 /* Groups - have to be first */
-                List<Group> groups = flowNode.get().getGroup() != null ? flowNode.get().getGroup()
-                        : Collections.<Group>emptyList();
+                Collection<Group> groups = flowNode.get().nonnullGroup().values();
                 List<Group> toBeInstalledGroups = new ArrayList<>();
                 toBeInstalledGroups.addAll(groups);
                 // new list for suspected groups pointing to ports .. when the ports come up
@@ -392,12 +417,12 @@ 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();
                             }
@@ -469,8 +494,7 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
                     }
                 }
                 /* Meters */
-                List<Meter> meters = flowNode.get().getMeter() != null ? flowNode.get().getMeter()
-                        : Collections.<Meter>emptyList();
+                Collection<Meter> meters = flowNode.get().nonnullMeter().values();
                 for (Meter meter : meters) {
                     final KeyedInstanceIdentifier<Meter, MeterKey> meterIdent = nodeIdentity.child(Meter.class,
                             meter.key());
@@ -482,13 +506,13 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
                 awaitGroups(node, groupFutures.values());
 
                 /* Flows */
-                List<Table> tables = flowNode.get().getTable() != null ? flowNode.get().getTable()
+                Collection<Table> tables = flowNode.get().getTable() != null ? flowNode.get().nonnullTable().values()
                         : Collections.<Table>emptyList();
                 int flowCount = 0;
                 for (Table table : tables) {
                     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,
@@ -496,6 +520,7 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
                         provider.getFlowCommiter().add(flowIdent, flow, nodeIdentity);
                     }
                 }
+                reconciliationState.setState(COMPLETED, LocalDateTime.now());
                 OF_EVENT_LOG.debug("Reconciliation Finish, Node: {}, flow count: {}", dpnId, flowCount);
             }
             return true;
@@ -510,7 +535,7 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
          * @param group
          *            The group to add.
          */
-        private void addGroup(Map<Uint32, 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 Uint32 groupId = group.getGroupId().getValue();
             ListenableFuture<?> future = JdkFutureAdapters
@@ -518,7 +543,7 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
 
             Futures.addCallback(future, new FutureCallback<Object>() {
                 @Override
-                public void onSuccess(Object result) {
+                public void onSuccess(final Object result) {
                     if (LOG.isTraceEnabled()) {
                         LOG.trace("add-group RPC completed: node={}, id={}",
                                 nodeIdentity.firstKeyOf(Node.class).getId().getValue(), groupId);
@@ -526,7 +551,7 @@ 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);
                 }
@@ -544,7 +569,7 @@ 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));
         }
 
@@ -556,7 +581,7 @@ 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 {
@@ -569,18 +594,15 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
         }
     }
 
-    @SuppressFBWarnings(value = "UPM_UNCALLED_PRIVATE_METHOD",
-            justification = "https://github.com/spotbugs/spotbugs/issues/811")
-    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.empty();
 
@@ -595,13 +617,11 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
             LOG.debug("Proceeding with deletion of stale-marked Flows on switch {} using Openflow interface",
                     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.get().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);
@@ -624,8 +644,7 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
             // 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();
+            Collection<StaleGroup> staleGroups = flowNode.get().nonnullStaleGroup().values();
             for (StaleGroup staleGroup : staleGroups) {
 
                 GroupBuilder groupBuilder = new GroupBuilder(staleGroup);
@@ -642,8 +661,7 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
             LOG.debug("Proceeding with deletion of stale-marked Meters for switch {} using Openflow interface",
                     nodeIdent);
             /* Stale-marked Meters - can be deleted anytime - so least priority */
-            List<StaleMeter> staleMeters = flowNode.get().getStaleMeter() != null ? flowNode.get().getStaleMeter()
-                    : Collections.<StaleMeter>emptyList();
+            Collection<StaleMeter> staleMeters = flowNode.get().getStaleMeter().values();
 
             for (StaleMeter staleMeter : staleMeters) {
 
@@ -668,7 +686,7 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
         deleteDSStaleMeters(staleMetersToBeBulkDeleted);
     }
 
-    private void deleteDSStaleFlows(List<InstanceIdentifier<StaleFlow>> flowsForBulkDelete) {
+    private void deleteDSStaleFlows(final List<InstanceIdentifier<StaleFlow>> flowsForBulkDelete) {
         WriteTransaction writeTransaction = dataBroker.newWriteOnlyTransaction();
 
         for (InstanceIdentifier<StaleFlow> staleFlowIId : flowsForBulkDelete) {
@@ -679,7 +697,7 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
         handleStaleEntityDeletionResultFuture(submitFuture);
     }
 
-    private void deleteDSStaleGroups(List<InstanceIdentifier<StaleGroup>> groupsForBulkDelete) {
+    private void deleteDSStaleGroups(final List<InstanceIdentifier<StaleGroup>> groupsForBulkDelete) {
         WriteTransaction writeTransaction = dataBroker.newWriteOnlyTransaction();
 
         for (InstanceIdentifier<StaleGroup> staleGroupIId : groupsForBulkDelete) {
@@ -690,7 +708,7 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
         handleStaleEntityDeletionResultFuture(submitFuture);
     }
 
-    private void deleteDSStaleMeters(List<InstanceIdentifier<StaleMeter>> metersForBulkDelete) {
+    private void deleteDSStaleMeters(final List<InstanceIdentifier<StaleMeter>> metersForBulkDelete) {
         WriteTransaction writeTransaction = dataBroker.newWriteOnlyTransaction();
 
         for (InstanceIdentifier<StaleMeter> staleMeterIId : metersForBulkDelete) {
@@ -701,40 +719,38 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
         handleStaleEntityDeletionResultFuture(submitFuture);
     }
 
-    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())));
     }
 
-    @SuppressFBWarnings(value = "UPM_UNCALLED_PRIVATE_METHOD",
-            justification = "https://github.com/spotbugs/spotbugs/issues/811")
     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()) {
+        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()) {
+        for (Table table : flowNode.nonnullTable().values()) {
             final KeyedInstanceIdentifier<Table, TableKey> tableIdent = nodeIdentity.child(Table.class, table.key());
-            for (Flow flow : table.nonnullFlow()) {
+            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));
             }
@@ -743,36 +759,32 @@ public class FlowNodeReconciliationImpl implements FlowNodeReconciliation {
         return futureList;
     }
 
-    private void handleStaleEntityDeletionResultFuture(FluentFuture<?> submitFuture) {
+    private static void handleStaleEntityDeletionResultFuture(final FluentFuture<?> submitFuture) {
         submitFuture.addCallback(new FutureCallback<Object>() {
             @Override
-            public void onSuccess(Object result) {
+            public void onSuccess(final Object result) {
                 LOG.debug("Stale entity removal success");
             }
 
             @Override
-            public void onFailure(Throwable 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();
     }
 
-    @SuppressFBWarnings(value = "UPM_UNCALLED_PRIVATE_METHOD",
-            justification = "https://github.com/spotbugs/spotbugs/issues/811")
-    private Messages createMessages(final NodeRef nodeRef) {
+    private static Messages createMessages(final NodeRef nodeRef) {
         final List<Message> messages = new ArrayList<>();
         messages.add(new MessageBuilder().setNode(nodeRef)
                 .setBundleInnerMessage(new BundleRemoveFlowCaseBuilder()