Minor bug fix in stale flow statistics data cleanup
[controller.git] / opendaylight / md-sal / statistics-manager / src / main / java / org / opendaylight / controller / md / statistics / manager / StatisticsUpdateCommiter.java
index 5743865d39539cbf8fb32404abf28c5b9194faa0..5f264abc2cb41cf68939ec323e54c7064707a515 100644 (file)
@@ -7,11 +7,16 @@
  */
 package org.opendaylight.controller.md.statistics.manager;
 
-import java.util.HashMap;
+import java.net.Inet4Address;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
 import java.util.List;
 import java.util.concurrent.ConcurrentMap;
 
+import org.opendaylight.controller.md.statistics.manager.NodeStatisticsAger.FlowEntry;
+import org.opendaylight.controller.md.statistics.manager.NodeStatisticsAger.QueueEntry;
 import org.opendaylight.controller.sal.binding.api.data.DataModificationTransaction;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Prefix;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNodeConnector;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowId;
@@ -44,7 +49,6 @@ import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.table.statistics.rev13
 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.port.rev130925.queues.Queue;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.port.rev130925.queues.QueueBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.port.rev130925.queues.QueueKey;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.queue.rev130925.QueueId;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.flow.Match;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.GroupDescStatsUpdated;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.statistics.rev131111.GroupFeaturesUpdated;
@@ -88,7 +92,8 @@ import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.statistics.rev131111.
 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.statistics.rev131111.nodes.node.meter.MeterStatisticsBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.types.rev130918.meter.config.stats.reply.MeterConfigStats;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.meter.types.rev130918.meter.statistics.reply.MeterStats;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.model.statistics.types.rev130925.GenericQueueStatistics;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.match.Layer3Match;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.match.layer._3.match.Ipv4Match;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.statistics.types.rev130925.GenericStatistics;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.port.statistics.rev131214.FlowCapableNodeConnectorStatisticsData;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.port.statistics.rev131214.FlowCapableNodeConnectorStatisticsDataBuilder;
@@ -108,68 +113,70 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 /**
- * Class implement statistics manager related listener interface and augment all the
+ * Class implement statistics manager related listener interface and augment all the 
  * received statistics data to data stores.
- * TODO: Need to add error message listener and clean-up the associated tx id
+ * TODO: Need to add error message listener and clean-up the associated tx id 
  * if it exists in the tx-id cache.
  * @author vishnoianil
  *
  */
 public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsListener,
-        OpendaylightMeterStatisticsListener,
+        OpendaylightMeterStatisticsListener, 
         OpendaylightFlowStatisticsListener,
         OpendaylightPortStatisticsListener,
         OpendaylightFlowTableStatisticsListener,
         OpendaylightQueueStatisticsListener{
-
+    
     public final static Logger sucLogger = LoggerFactory.getLogger(StatisticsUpdateCommiter.class);
 
     private final StatisticsProvider statisticsManager;
-
-    private final int unaccountedFlowsCounter = 1;
+    private final MultipartMessageManager messageManager;
+    
+    private int unaccountedFlowsCounter = 1;
 
     public StatisticsUpdateCommiter(final StatisticsProvider manager){
 
         this.statisticsManager = manager;
+        this.messageManager = this.statisticsManager.getMultipartMessageManager();
     }
-
+    
     public StatisticsProvider getStatisticsManager(){
         return statisticsManager;
     }
-
+   
     @Override
     public void onMeterConfigStatsUpdated(MeterConfigStatsUpdated notification) {
         //Check if response is for the request statistics-manager sent.
-        if(this.statisticsManager.getMultipartMessageManager().removeTxId(notification.getTransactionId()) == null)
+        if(!messageManager.isRequestTxIdExist(notification.getId(),notification.getTransactionId(),notification.isMoreReplies()))
             return;
+        
+        NodeKey key = new NodeKey(notification.getId());
 
         //Add statistics to local cache
-        ConcurrentMap<NodeId, NodeStatistics> cache = this.statisticsManager.getStatisticsCache();
+        ConcurrentMap<NodeId, NodeStatisticsAger> cache = this.statisticsManager.getStatisticsCache();
         if(!cache.containsKey(notification.getId())){
-            cache.put(notification.getId(), new NodeStatistics());
+            cache.put(notification.getId(), new NodeStatisticsAger(statisticsManager,key));
         }
-        cache.get(notification.getId()).setMeterConfigStats(notification.getMeterConfigStats());
-
+        cache.get(notification.getId()).updateMeterConfigStats(notification.getMeterConfigStats());
+        
         //Publish data to configuration data store
-        NodeKey key = new NodeKey(notification.getId());
-
-        List<MeterConfigStats> eterConfigStatsList = notification.getMeterConfigStats();
-
-        for(MeterConfigStats meterConfigStats : eterConfigStatsList){
+        List<MeterConfigStats> meterConfigStatsList = notification.getMeterConfigStats();
+        
+        for(MeterConfigStats meterConfigStats : meterConfigStatsList){
             DataModificationTransaction it = this.statisticsManager.startChange();
             MeterBuilder meterBuilder = new MeterBuilder();
             MeterKey meterKey = new MeterKey(meterConfigStats.getMeterId());
             meterBuilder.setKey(meterKey);
-
+            
             InstanceIdentifier<Meter> meterRef = InstanceIdentifier.builder(Nodes.class).child(Node.class,key)
                                                                                         .augmentation(FlowCapableNode.class)
                                                                                         .child(Meter.class,meterKey).toInstance();
-
+            
             NodeMeterConfigStatsBuilder meterConfig= new NodeMeterConfigStatsBuilder();
             MeterConfigStatsBuilder stats = new MeterConfigStatsBuilder();
             stats.fieldsFrom(meterConfigStats);
             meterConfig.setMeterConfigStats(stats.build());
-
+            
             //Update augmented data
             meterBuilder.addAugmentation(NodeMeterConfigStats.class, meterConfig.build());
             it.putOperationalData(meterRef, meterBuilder.build());
@@ -180,22 +187,15 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
 
     @Override
     public void onMeterStatisticsUpdated(MeterStatisticsUpdated notification) {
-
+        
         //Check if response is for the request statistics-manager sent.
-        if(this.statisticsManager.getMultipartMessageManager().removeTxId(notification.getTransactionId()) == null)
+        if(!messageManager.isRequestTxIdExist(notification.getId(),notification.getTransactionId(),notification.isMoreReplies()))
             return;
 
-        //Add statistics to local cache
-        ConcurrentMap<NodeId, NodeStatistics> cache = this.statisticsManager.getStatisticsCache();
-        if(!cache.containsKey(notification.getId())){
-            cache.put(notification.getId(), new NodeStatistics());
-        }
-        cache.get(notification.getId()).setMeterStatistics(notification.getMeterStats());
-
         NodeKey key = new NodeKey(notification.getId());
-
+        
         List<MeterStats> meterStatsList = notification.getMeterStats();
-
+        
         for(MeterStats meterStats : meterStatsList){
 
             //Publish data to configuration data store
@@ -203,11 +203,11 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
             MeterBuilder meterBuilder = new MeterBuilder();
             MeterKey meterKey = new MeterKey(meterStats.getMeterId());
             meterBuilder.setKey(meterKey);
-
+            
             InstanceIdentifier<Meter> meterRef = InstanceIdentifier.builder(Nodes.class).child(Node.class,key)
                                                                                         .augmentation(FlowCapableNode.class)
                                                                                         .child(Meter.class,meterKey).toInstance();
-
+            
             NodeMeterStatisticsBuilder meterStatsBuilder= new NodeMeterStatisticsBuilder();
             MeterStatisticsBuilder stats = new MeterStatisticsBuilder();
             stats.fieldsFrom(meterStats);
@@ -222,29 +222,30 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
 
     @Override
     public void onGroupDescStatsUpdated(GroupDescStatsUpdated notification) {
-
+        
         //Check if response is for the request statistics-manager sent.
-        if(this.statisticsManager.getMultipartMessageManager().removeTxId(notification.getTransactionId()) == null)
+        if(!messageManager.isRequestTxIdExist(notification.getId(),notification.getTransactionId(),notification.isMoreReplies()))
             return;
 
+        NodeKey key = new NodeKey(notification.getId());
+
         //Add statistics to local cache
-        ConcurrentMap<NodeId, NodeStatistics> cache = this.statisticsManager.getStatisticsCache();
+        ConcurrentMap<NodeId, NodeStatisticsAger> cache = this.statisticsManager.getStatisticsCache();
         if(!cache.containsKey(notification.getId())){
-            cache.put(notification.getId(), new NodeStatistics());
+            cache.put(notification.getId(), new NodeStatisticsAger(statisticsManager,key));
         }
-        cache.get(notification.getId()).setGroupDescStats(notification.getGroupDescStats());
-
+        cache.get(notification.getId()).updateGroupDescStats(notification.getGroupDescStats());
+        
         //Publish data to configuration data store
-        NodeKey key = new NodeKey(notification.getId());
         List<GroupDescStats> groupDescStatsList = notification.getGroupDescStats();
 
         for(GroupDescStats groupDescStats : groupDescStatsList){
             DataModificationTransaction it = this.statisticsManager.startChange();
-
+            
             GroupBuilder groupBuilder = new GroupBuilder();
             GroupKey groupKey = new GroupKey(groupDescStats.getGroupId());
             groupBuilder.setKey(groupKey);
-
+            
             InstanceIdentifier<Group> groupRef = InstanceIdentifier.builder(Nodes.class).child(Node.class,key)
                                                                                         .augmentation(FlowCapableNode.class)
                                                                                         .child(Group.class,groupKey).toInstance();
@@ -253,7 +254,7 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
             GroupDescBuilder stats = new GroupDescBuilder();
             stats.fieldsFrom(groupDescStats);
             groupDesc.setGroupDesc(stats.build());
-
+            
             //Update augmented data
             groupBuilder.addAugmentation(NodeGroupDescStats.class, groupDesc.build());
 
@@ -264,29 +265,22 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
 
     @Override
     public void onGroupStatisticsUpdated(GroupStatisticsUpdated notification) {
-
+        
         //Check if response is for the request statistics-manager sent.
-        if(this.statisticsManager.getMultipartMessageManager().removeTxId(notification.getTransactionId()) == null)
+        if(!messageManager.isRequestTxIdExist(notification.getId(),notification.getTransactionId(),notification.isMoreReplies()))
             return;
 
-        //Add statistics to local cache
-        ConcurrentMap<NodeId, NodeStatistics> cache = this.statisticsManager.getStatisticsCache();
-        if(!cache.containsKey(notification.getId())){
-            cache.put(notification.getId(), new NodeStatistics());
-        }
-        cache.get(notification.getId()).setGroupStatistics(notification.getGroupStats());
-
         //Publish data to configuration data store
         NodeKey key = new NodeKey(notification.getId());
         List<GroupStats> groupStatsList = notification.getGroupStats();
 
         for(GroupStats groupStats : groupStatsList){
             DataModificationTransaction it = this.statisticsManager.startChange();
-
+            
             GroupBuilder groupBuilder = new GroupBuilder();
             GroupKey groupKey = new GroupKey(groupStats.getGroupId());
             groupBuilder.setKey(groupKey);
-
+            
             InstanceIdentifier<Group> groupRef = InstanceIdentifier.builder(Nodes.class).child(Node.class,key)
                                                                                         .augmentation(FlowCapableNode.class)
                                                                                         .child(Group.class,groupKey).toInstance();
@@ -295,80 +289,66 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
             GroupStatisticsBuilder stats = new GroupStatisticsBuilder();
             stats.fieldsFrom(groupStats);
             groupStatisticsBuilder.setGroupStatistics(stats.build());
-
+            
             //Update augmented data
             groupBuilder.addAugmentation(NodeGroupStatistics.class, groupStatisticsBuilder.build());
             it.putOperationalData(groupRef, groupBuilder.build());
             it.commit();
         }
     }
-
+    
     @Override
     public void onMeterFeaturesUpdated(MeterFeaturesUpdated notification) {
 
-        //Add statistics to local cache
-        ConcurrentMap<NodeId, NodeStatistics> cache = this.statisticsManager.getStatisticsCache();
-        if(!cache.containsKey(notification.getId())){
-            cache.put(notification.getId(), new NodeStatistics());
-        }
         MeterFeaturesBuilder meterFeature = new MeterFeaturesBuilder();
         meterFeature.setMeterBandSupported(notification.getMeterBandSupported());
         meterFeature.setMeterCapabilitiesSupported(notification.getMeterCapabilitiesSupported());
         meterFeature.setMaxBands(notification.getMaxBands());
         meterFeature.setMaxColor(notification.getMaxColor());
         meterFeature.setMaxMeter(notification.getMaxMeter());
-
-        cache.get(notification.getId()).setMeterFeatures(meterFeature.build());
-
+        
         //Publish data to configuration data store
         DataModificationTransaction it = this.statisticsManager.startChange();
         NodeKey key = new NodeKey(notification.getId());
         NodeRef ref = getNodeRef(key);
-
-        final NodeBuilder nodeData = new NodeBuilder();
+        
+        final NodeBuilder nodeData = new NodeBuilder(); 
         nodeData.setKey(key);
-
+        
         NodeMeterFeaturesBuilder nodeMeterFeatures= new NodeMeterFeaturesBuilder();
         nodeMeterFeatures.setMeterFeatures(meterFeature.build());
-
+        
         //Update augmented data
         nodeData.addAugmentation(NodeMeterFeatures.class, nodeMeterFeatures.build());
-
+        
         InstanceIdentifier<? extends Object> refValue = ref.getValue();
         it.putOperationalData(refValue, nodeData.build());
         it.commit();
     }
-
+    
     @Override
     public void onGroupFeaturesUpdated(GroupFeaturesUpdated notification) {
 
-        //Add statistics to local cache
-        ConcurrentMap<NodeId, NodeStatistics> cache = this.statisticsManager.getStatisticsCache();
-        if(!cache.containsKey(notification.getId())){
-            cache.put(notification.getId(), new NodeStatistics());
-        }
-
         GroupFeaturesBuilder groupFeatures = new GroupFeaturesBuilder();
         groupFeatures.setActions(notification.getActions());
         groupFeatures.setGroupCapabilitiesSupported(notification.getGroupCapabilitiesSupported());
         groupFeatures.setGroupTypesSupported(notification.getGroupTypesSupported());
         groupFeatures.setMaxGroups(notification.getMaxGroups());
-        cache.get(notification.getId()).setGroupFeatures(groupFeatures.build());
-
+        
         //Publish data to configuration data store
         DataModificationTransaction it = this.statisticsManager.startChange();
         NodeKey key = new NodeKey(notification.getId());
         NodeRef ref = getNodeRef(key);
-
-        final NodeBuilder nodeData = new NodeBuilder();
+        
+        final NodeBuilder nodeData = new NodeBuilder(); 
         nodeData.setKey(key);
-
+        
         NodeGroupFeaturesBuilder nodeGroupFeatures= new NodeGroupFeaturesBuilder();
         nodeGroupFeatures.setGroupFeatures(groupFeatures.build());
-
+        
         //Update augmented data
         nodeData.addAugmentation(NodeGroupFeatures.class, nodeGroupFeatures.build());
-
+        
         InstanceIdentifier<? extends Object> refValue = ref.getValue();
         it.putOperationalData(refValue, nodeData.build());
         it.commit();
@@ -376,17 +356,17 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
 
     @Override
     public void onFlowsStatisticsUpdate(FlowsStatisticsUpdate notification) {
-
+        
         //Check if response is for the request statistics-manager sent.
-        if(this.statisticsManager.getMultipartMessageManager().removeTxId(notification.getTransactionId()) == null)
+        if(!messageManager.isRequestTxIdExist(notification.getId(),notification.getTransactionId(),notification.isMoreReplies()))
             return;
 
         NodeKey key = new NodeKey(notification.getId());
         sucLogger.debug("Received flow stats update : {}",notification.toString());
-
+        
         for(FlowAndStatisticsMapList map: notification.getFlowAndStatisticsMapList()){
             short tableId = map.getTableId();
-
+            
             DataModificationTransaction it = this.statisticsManager.startChange();
 
             boolean foundOriginalFlow = false;
@@ -416,26 +396,23 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
             flow.setPriority(map.getPriority());
             flow.setStrict(map.isStrict());
             flow.setTableId(tableId);
-
+                
             Flow flowRule = flow.build();
-
+                
             FlowAndStatisticsMapListBuilder stats = new FlowAndStatisticsMapListBuilder();
             stats.setByteCount(map.getByteCount());
             stats.setPacketCount(map.getPacketCount());
             stats.setDuration(map.getDuration());
-
+                
             GenericStatistics flowStats = stats.build();
-
+                
             //Add statistics to local cache
-            ConcurrentMap<NodeId, NodeStatistics> cache = this.statisticsManager.getStatisticsCache();
+            ConcurrentMap<NodeId, NodeStatisticsAger> cache = this.statisticsManager.getStatisticsCache();
             if(!cache.containsKey(notification.getId())){
-                cache.put(notification.getId(), new NodeStatistics());
+                cache.put(notification.getId(), new NodeStatisticsAger(statisticsManager,key));
             }
-            if(!cache.get(notification.getId()).getFlowAndStatsMap().containsKey(tableId)){
-                cache.get(notification.getId()).getFlowAndStatsMap().put(tableId, new HashMap<Flow,GenericStatistics>());
-            }
-            cache.get(notification.getId()).getFlowAndStatsMap().get(tableId).put(flowRule,flowStats);
-
+            NodeStatisticsAger nsa = cache.get(notification.getId());
+                
             //Augment the data to the flow node
 
             FlowStatisticsBuilder flowStatistics = new FlowStatisticsBuilder();
@@ -460,50 +437,92 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
             flowStatistics.setTableId(tableId);
 
             flowStatisticsData.setFlowStatistics(flowStatistics.build());
-
+                
             sucLogger.debug("Flow : {}",flowRule.toString());
             sucLogger.debug("Statistics to augment : {}",flowStatistics.build().toString());
 
             InstanceIdentifier<Table> tableRef = InstanceIdentifier.builder(Nodes.class).child(Node.class, key)
                     .augmentation(FlowCapableNode.class).child(Table.class, new TableKey(tableId)).toInstance();
-
+            
             Table table= (Table)it.readConfigurationData(tableRef);
 
             //TODO: Not a good way to do it, need to figure out better way.
-            //TODO: major issue in any alternate approach is that flow key is incrementally assigned
+            //TODO: major issue in any alternate approach is that flow key is incrementally assigned 
             //to the flows stored in data store.
+            // Augment same statistics to all the matching masked flow
             if(table != null){
 
                 for(Flow existingFlow : table.getFlow()){
                     sucLogger.debug("Existing flow in data store : {}",existingFlow.toString());
                     if(flowEquals(flowRule,existingFlow)){
+                        it = this.statisticsManager.startChange();
                         InstanceIdentifier<Flow> flowRef = InstanceIdentifier.builder(Nodes.class).child(Node.class, key)
                                 .augmentation(FlowCapableNode.class)
                                 .child(Table.class, new TableKey(tableId))
                                 .child(Flow.class,existingFlow.getKey()).toInstance();
                         flowBuilder.setKey(existingFlow.getKey());
                         flowBuilder.addAugmentation(FlowStatisticsData.class, flowStatisticsData.build());
-                        sucLogger.trace("Found matching flow in the datastore, augmenting statistics");
+                        sucLogger.debug("Found matching flow in the datastore, augmenting statistics");
                         foundOriginalFlow = true;
+                        // Update entry with timestamp of latest response 
+                        flow.setKey(existingFlow.getKey());
+                        FlowEntry flowStatsEntry = nsa.new FlowEntry(tableId,flow.build());
+                        cache.get(notification.getId()).updateFlowStats(flowStatsEntry);
+
                         it.putOperationalData(flowRef, flowBuilder.build());
                         it.commit();
-                        break;
                     }
                 }
             }
+            
+            table= (Table)it.readOperationalData(tableRef);
+            if(!foundOriginalFlow && table != null){
 
+                for(Flow existingFlow : table.getFlow()){
+                    FlowStatisticsData augmentedflowStatisticsData = existingFlow.getAugmentation(FlowStatisticsData.class);
+                    if(augmentedflowStatisticsData != null){
+                        FlowBuilder existingOperationalFlow = new FlowBuilder();
+                        existingOperationalFlow.fieldsFrom(augmentedflowStatisticsData.getFlowStatistics());
+                        sucLogger.debug("Existing unaccounted flow in operational data store : {}",existingFlow.toString());
+                        if(flowEquals(flowRule,existingOperationalFlow.build())){
+                            InstanceIdentifier<Flow> flowRef = InstanceIdentifier.builder(Nodes.class).child(Node.class, key)
+                                    .augmentation(FlowCapableNode.class)
+                                    .child(Table.class, new TableKey(tableId))
+                                    .child(Flow.class,existingFlow.getKey()).toInstance();
+                            flowBuilder.setKey(existingFlow.getKey());
+                            flowBuilder.addAugmentation(FlowStatisticsData.class, flowStatisticsData.build());
+                            sucLogger.debug("Found matching unaccounted flow in the operational datastore, augmenting statistics");
+                            foundOriginalFlow = true;
+                            
+                            // Update entry with timestamp of latest response 
+                            flow.setKey(existingFlow.getKey());
+                            FlowEntry flowStatsEntry = nsa.new FlowEntry(tableId,flow.build());
+                            cache.get(notification.getId()).updateFlowStats(flowStatsEntry);
+
+                            it.putOperationalData(flowRef, flowBuilder.build());
+                            it.commit();
+                            break;
+                        }
+                    }
+                }
+            }
             if(!foundOriginalFlow){
-                sucLogger.debug("Associated original flow is not found in data store. Augmenting flow in operational data store");
-                //TODO: Temporary fix: format [ 1+tableid+1+unaccounted flow counter]
-                long flowKey = Long.parseLong(new String("1"+Short.toString(tableId)+"1"+Integer.toString(this.unaccountedFlowsCounter)));
-                FlowKey newFlowKey = new FlowKey(new FlowId(Long.toString(flowKey)));
+                String flowKey = "#UF$TABLE*"+Short.toString(tableId)+"*"+Integer.toString(this.unaccountedFlowsCounter);
+                this.unaccountedFlowsCounter++;
+                FlowKey newFlowKey = new FlowKey(new FlowId(flowKey));
                 InstanceIdentifier<Flow> flowRef = InstanceIdentifier.builder(Nodes.class).child(Node.class, key)
                         .augmentation(FlowCapableNode.class)
                         .child(Table.class, new TableKey(tableId))
                         .child(Flow.class,newFlowKey).toInstance();
                 flowBuilder.setKey(newFlowKey);
                 flowBuilder.addAugmentation(FlowStatisticsData.class, flowStatisticsData.build());
-                sucLogger.trace("Flow was no present in data store, augmenting statistics as an unaccounted flow");
+                sucLogger.debug("Flow {} is not present in config data store, augmenting statistics as an unaccounted flow",flowBuilder.build());
+                
+                // Update entry with timestamp of latest response 
+                flow.setKey(newFlowKey);
+                FlowEntry flowStatsEntry = nsa.new FlowEntry(tableId,flow.build());
+                cache.get(notification.getId()).updateFlowStats(flowStatsEntry);
+
                 it.putOperationalData(flowRef, flowBuilder.build());
                 it.commit();
             }
@@ -513,15 +532,14 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
     @Override
     public void onAggregateFlowStatisticsUpdate(AggregateFlowStatisticsUpdate notification) {
         //Check if response is for the request statistics-manager sent.
-        if(this.statisticsManager.getMultipartMessageManager().removeTxId(notification.getTransactionId()) == null)
+        if(!messageManager.isRequestTxIdExist(notification.getId(),notification.getTransactionId(),notification.isMoreReplies()))
             return;
 
         NodeKey key = new NodeKey(notification.getId());
-        sucLogger.debug("Received aggregate flow statistics update : {}",notification.toString());
-
-        Short tableId = this.statisticsManager.getMultipartMessageManager().getTableIdForTxId(notification.getTransactionId());
+        
+        Short tableId = messageManager.getTableIdForTxId(notification.getId(),notification.getTransactionId());
         if(tableId != null){
-
+            
             DataModificationTransaction it = this.statisticsManager.startChange();
 
             InstanceIdentifier<Table> tableRef = InstanceIdentifier.builder(Nodes.class).child(Node.class, key)
@@ -533,13 +551,7 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
             aggregateFlowStatisticsBuilder.setFlowCount(notification.getFlowCount());
             aggregateFlowStatisticsBuilder.setPacketCount(notification.getPacketCount());
             aggregateFlowStatisticsDataBuilder.setAggregateFlowStatistics(aggregateFlowStatisticsBuilder.build());
-
-            ConcurrentMap<NodeId, NodeStatistics> cache = this.statisticsManager.getStatisticsCache();
-            if(!cache.containsKey(notification.getId())){
-                cache.put(notification.getId(), new NodeStatistics());
-            }
-            cache.get(notification.getId()).getTableAndAggregateFlowStatsMap().put(tableId,aggregateFlowStatisticsBuilder.build());
-
+            
             sucLogger.debug("Augment aggregate statistics: {} for table {} on Node {}",aggregateFlowStatisticsBuilder.build().toString(),tableId,key);
 
             TableBuilder tableBuilder = new TableBuilder();
@@ -554,25 +566,17 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
     @Override
     public void onNodeConnectorStatisticsUpdate(NodeConnectorStatisticsUpdate notification) {
         //Check if response is for the request statistics-manager sent.
-        if(this.statisticsManager.getMultipartMessageManager().removeTxId(notification.getTransactionId()) == null)
+        if(!messageManager.isRequestTxIdExist(notification.getId(),notification.getTransactionId(),notification.isMoreReplies()))
             return;
 
         NodeKey key = new NodeKey(notification.getId());
-        sucLogger.debug("Received port stats update : {}",notification.toString());
-
-        //Add statistics to local cache
-        ConcurrentMap<NodeId, NodeStatistics> cache = this.statisticsManager.getStatisticsCache();
-        if(!cache.containsKey(notification.getId())){
-            cache.put(notification.getId(), new NodeStatistics());
-        }
-
-
+        
         List<NodeConnectorStatisticsAndPortNumberMap> portsStats = notification.getNodeConnectorStatisticsAndPortNumberMap();
         for(NodeConnectorStatisticsAndPortNumberMap portStats : portsStats){
-
+            
             DataModificationTransaction it = this.statisticsManager.startChange();
 
-            FlowCapableNodeConnectorStatisticsBuilder statisticsBuilder
+            FlowCapableNodeConnectorStatisticsBuilder statisticsBuilder 
                                             = new FlowCapableNodeConnectorStatisticsBuilder();
             statisticsBuilder.setBytes(portStats.getBytes());
             statisticsBuilder.setCollisionCount(portStats.getCollisionCount());
@@ -585,20 +589,17 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
             statisticsBuilder.setReceiveOverRunError(portStats.getReceiveOverRunError());
             statisticsBuilder.setTransmitDrops(portStats.getTransmitDrops());
             statisticsBuilder.setTransmitErrors(portStats.getTransmitErrors());
-
-            //Update data in the cache
-            cache.get(notification.getId()).getNodeConnectorStats().put(portStats.getNodeConnectorId(), statisticsBuilder.build());
-
+            
             //Augment data to the node-connector
-            FlowCapableNodeConnectorStatisticsDataBuilder statisticsDataBuilder =
+            FlowCapableNodeConnectorStatisticsDataBuilder statisticsDataBuilder = 
                     new FlowCapableNodeConnectorStatisticsDataBuilder();
-
+            
             statisticsDataBuilder.setFlowCapableNodeConnectorStatistics(statisticsBuilder.build());
-
+            
             InstanceIdentifier<NodeConnector> nodeConnectorRef = InstanceIdentifier.builder(Nodes.class).child(Node.class, key).child(NodeConnector.class, new NodeConnectorKey(portStats.getNodeConnectorId())).toInstance();
-
+            
             NodeConnector nodeConnector = (NodeConnector)it.readOperationalData(nodeConnectorRef);
-
+            
             if(nodeConnector != null){
                 sucLogger.debug("Augmenting port statistics {} to port {}",statisticsDataBuilder.build().toString(),nodeConnectorRef.toString());
                 NodeConnectorBuilder nodeConnectorBuilder = new NodeConnectorBuilder();
@@ -612,37 +613,30 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
     @Override
     public void onFlowTableStatisticsUpdate(FlowTableStatisticsUpdate notification) {
         //Check if response is for the request statistics-manager sent.
-        if(this.statisticsManager.getMultipartMessageManager().removeTxId(notification.getTransactionId()) == null)
+        if(!messageManager.isRequestTxIdExist(notification.getId(),notification.getTransactionId(),notification.isMoreReplies()))
             return;
 
         NodeKey key = new NodeKey(notification.getId());
-        sucLogger.debug("Received flow table statistics update : {}",notification.toString());
-
+        
         List<FlowTableAndStatisticsMap> flowTablesStatsList = notification.getFlowTableAndStatisticsMap();
         for (FlowTableAndStatisticsMap ftStats : flowTablesStatsList){
-
+            
             DataModificationTransaction it = this.statisticsManager.startChange();
 
             InstanceIdentifier<Table> tableRef = InstanceIdentifier.builder(Nodes.class).child(Node.class, key)
                     .augmentation(FlowCapableNode.class).child(Table.class, new TableKey(ftStats.getTableId().getValue())).toInstance();
-
+            
             FlowTableStatisticsDataBuilder statisticsDataBuilder = new FlowTableStatisticsDataBuilder();
-
+            
             FlowTableStatisticsBuilder statisticsBuilder = new FlowTableStatisticsBuilder();
             statisticsBuilder.setActiveFlows(ftStats.getActiveFlows());
             statisticsBuilder.setPacketsLookedUp(ftStats.getPacketsLookedUp());
             statisticsBuilder.setPacketsMatched(ftStats.getPacketsMatched());
-
+            
             statisticsDataBuilder.setFlowTableStatistics(statisticsBuilder.build());
-
-            ConcurrentMap<NodeId, NodeStatistics> cache = this.statisticsManager.getStatisticsCache();
-            if(!cache.containsKey(notification.getId())){
-                cache.put(notification.getId(), new NodeStatistics());
-            }
-            cache.get(notification.getId()).getFlowTableAndStatisticsMap().put(ftStats.getTableId().getValue(),statisticsBuilder.build());
-
+            
             sucLogger.debug("Augment flow table statistics: {} for table {} on Node {}",statisticsBuilder.build().toString(),ftStats.getTableId(),key);
-
+            
             TableBuilder tableBuilder = new TableBuilder();
             tableBuilder.setKey(new TableKey(ftStats.getTableId().getValue()));
             tableBuilder.addAugmentation(FlowTableStatisticsData.class, statisticsDataBuilder.build());
@@ -653,81 +647,69 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
 
     @Override
     public void onQueueStatisticsUpdate(QueueStatisticsUpdate notification) {
-
+        
         //Check if response is for the request statistics-manager sent.
-        if(this.statisticsManager.getMultipartMessageManager().removeTxId(notification.getTransactionId()) == null)
+        if(!messageManager.isRequestTxIdExist(notification.getId(),notification.getTransactionId(),notification.isMoreReplies()))
             return;
 
         NodeKey key = new NodeKey(notification.getId());
-        sucLogger.debug("Received queue stats update : {}",notification.toString());
-
+        
         //Add statistics to local cache
-        ConcurrentMap<NodeId, NodeStatistics> cache = this.statisticsManager.getStatisticsCache();
+        ConcurrentMap<NodeId, NodeStatisticsAger> cache = this.statisticsManager.getStatisticsCache();
         if(!cache.containsKey(notification.getId())){
-            cache.put(notification.getId(), new NodeStatistics());
+            cache.put(notification.getId(), new NodeStatisticsAger(statisticsManager,key));
         }
-
+        
+        NodeStatisticsAger nsa = cache.get(notification.getId());
+        
         List<QueueIdAndStatisticsMap> queuesStats = notification.getQueueIdAndStatisticsMap();
         for(QueueIdAndStatisticsMap swQueueStats : queuesStats){
-
-            if(!cache.get(notification.getId()).getNodeConnectorAndQueuesStatsMap().containsKey(swQueueStats.getNodeConnectorId())){
-                cache.get(notification.getId()).getNodeConnectorAndQueuesStatsMap().put(swQueueStats.getNodeConnectorId(), new HashMap<QueueId,GenericQueueStatistics>());
-            }
-
+            
+            QueueEntry queueEntry = nsa.new QueueEntry(swQueueStats.getNodeConnectorId(),swQueueStats.getQueueId());
+            nsa.updateQueueStats(queueEntry);
+            
             FlowCapableNodeConnectorQueueStatisticsDataBuilder queueStatisticsDataBuilder = new FlowCapableNodeConnectorQueueStatisticsDataBuilder();
-
+            
             FlowCapableNodeConnectorQueueStatisticsBuilder queueStatisticsBuilder = new FlowCapableNodeConnectorQueueStatisticsBuilder();
-
+            
             queueStatisticsBuilder.fieldsFrom(swQueueStats);
-
+            
             queueStatisticsDataBuilder.setFlowCapableNodeConnectorQueueStatistics(queueStatisticsBuilder.build());
-
-            cache.get(notification.getId()).getNodeConnectorAndQueuesStatsMap()
-                                            .get(swQueueStats.getNodeConnectorId())
-                                            .put(swQueueStats.getQueueId(), queueStatisticsBuilder.build());
-
-
+            
             DataModificationTransaction it = this.statisticsManager.startChange();
 
-            InstanceIdentifier<Queue> queueRef
+            InstanceIdentifier<Queue> queueRef 
                     = InstanceIdentifier.builder(Nodes.class)
                                         .child(Node.class, key)
                                         .child(NodeConnector.class, new NodeConnectorKey(swQueueStats.getNodeConnectorId()))
                                         .augmentation(FlowCapableNodeConnector.class)
                                         .child(Queue.class, new QueueKey(swQueueStats.getQueueId())).toInstance();
-
+            
             QueueBuilder queueBuilder = new QueueBuilder();
             queueBuilder.addAugmentation(FlowCapableNodeConnectorQueueStatisticsData.class, queueStatisticsDataBuilder.build());
             queueBuilder.setKey(new QueueKey(swQueueStats.getQueueId()));
 
-            sucLogger.trace("Augmenting queue statistics {} of queue {} to port {}"
+            sucLogger.debug("Augmenting queue statistics {} of queue {} to port {}"
                                         ,queueStatisticsDataBuilder.build().toString(),
                                         swQueueStats.getQueueId(),
                                         swQueueStats.getNodeConnectorId());
-
+            
             it.putOperationalData(queueRef, queueBuilder.build());
             it.commit();
-
+            
         }
-
+        
     }
 
     private NodeRef getNodeRef(NodeKey nodeKey){
         InstanceIdentifierBuilder<?> builder = InstanceIdentifier.builder(Nodes.class).child(Node.class, nodeKey);
         return new NodeRef(builder.toInstance());
     }
-
+   
     public boolean flowEquals(Flow statsFlow, Flow storedFlow) {
         if (statsFlow.getClass() != storedFlow.getClass()) {
             return false;
         }
-        if (statsFlow.getBufferId()== null) {
-            if (storedFlow.getBufferId() != null) {
-                return false;
-            }
-        } else if(!statsFlow.getBufferId().equals(storedFlow.getBufferId())) {
-            return false;
-        }
         if (statsFlow.getContainerName()== null) {
             if (storedFlow.getContainerName()!= null) {
                 return false;
@@ -735,13 +717,6 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
         } else if(!statsFlow.getContainerName().equals(storedFlow.getContainerName())) {
             return false;
         }
-        if (statsFlow.getCookie()== null) {
-            if (storedFlow.getCookie()!= null) {
-                return false;
-            }
-        } else if(!statsFlow.getCookie().equals(storedFlow.getCookie())) {
-            return false;
-        }
         if (statsFlow.getMatch()== null) {
             if (storedFlow.getMatch() != null) {
                 return false;
@@ -750,22 +725,8 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
         else if(!matchEquals(statsFlow.getMatch(), storedFlow.getMatch())) {
             return false;
         }
-        if (statsFlow.getHardTimeout() == null) {
-            if (storedFlow.getHardTimeout() != null) {
-                return false;
-            }
-        } else if(!statsFlow.getHardTimeout().equals(storedFlow.getHardTimeout() )) {
-            return false;
-        }
-        if (statsFlow.getIdleTimeout()== null) {
-            if (storedFlow.getIdleTimeout() != null) {
-                return false;
-            }
-        } else if(!statsFlow.getIdleTimeout().equals(storedFlow.getIdleTimeout())) {
-            return false;
-        }
-        if (statsFlow.getPriority() == null) {
-            if (storedFlow.getPriority() != null) {
+        if (storedFlow.getPriority() == null) {
+            if (statsFlow.getPriority() != null && statsFlow.getPriority()!= 0x8000) {
                 return false;
             }
         } else if(!statsFlow.getPriority().equals(storedFlow.getPriority())) {
@@ -780,28 +741,27 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
         }
         return true;
     }
-
+    
     /**
      * Explicit equals method to compare the 'match' for flows stored in the data-stores and flow fetched from the switch.
-     * Usecase: e.g If user don't set any ethernet source and destination address for match,data store will store null for
-     * these address.
-     * e.g [_ethernetMatch=EthernetMatch [_ethernetDestination=null, _ethernetSource=null, _ethernetType=
-     * EthernetType [_type=EtherType [_value=2048], _mask=null, augmentation=[]]
-     *
-     * But when you fetch the flows from switch, openflow driver library converts all zero bytes of mac address in the
-     * message stream to 00:00:00:00:00:00. Following string shows how library interpret the zero mac address bytes and
-     * eventually when translator convert it to MD-SAL match, this is how it looks
-     * [_ethernetDestination=EthernetDestination [_address=MacAddress [_value=00:00:00:00:00:00], _mask=null, augmentation=[]],
-     * _ethernetSource=EthernetSource [_address=MacAddress [_value=00:00:00:00:00:00], _mask=null, augmentation=[]],
-     * _ethernetType=EthernetType [_type=EtherType [_value=2048], _mask=null, augmentation=[]]
-     *
-     * Similarly for inPort, if user/application don't set any value for it, FRM will store null value for it in data store.
-     * When we fetch the same flow (with its statistics) from switch, plugin converts its value to openflow:X:0.
-     *  e.g _inPort=Uri [_value=openflow:1:0]
-     *
-     * So this custom equals method add additional check to take care of these scenario, in case any match element is null in data-store-flow, but not
-     * in the flow fetched from switch.
-     *
+     * Flow installation process has three steps 
+     * 1) Store flow in config data store 
+     * 2) and send it to plugin for installation
+     * 3) Flow gets installed in switch
+     * 
+     * The flow user wants to install and what finally gets installed in switch can be slightly different. 
+     * E.g, If user installs flow with src/dst ip=10.0.0.1/24, when it get installed in the switch
+     * src/dst ip will be changes to 10.0.0.0/24 because of netmask of 24. When statistics manager fetch 
+     * stats it gets 10.0.0.0/24 rather then 10.0.0.1/24. Custom match takes care of by using masked ip
+     * while comparing two ip addresses.
+     * 
+     * Sometimes when user don't provide few values that is required by flow installation request, like 
+     * priority,hard timeout, idle timeout, cookies etc, plugin usages default values before sending 
+     * request to the switch. So when statistics manager gets flow statistics, it gets the default value.
+     * But the flow stored in config data store don't have those defaults value. I included those checks 
+     * in the customer flow/match equal function. 
+     * 
+     * 
      * @param statsFlow
      * @param storedFlow
      * @return
@@ -860,7 +820,7 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
             if (statsFlow.getLayer3Match() != null) {
                     return false;
             }
-        } else if(!storedFlow.getLayer3Match().equals(statsFlow.getLayer3Match())) {
+        } else if(!layer3MatchEquals(statsFlow.getLayer3Match(),storedFlow.getLayer3Match())) {
             return false;
         }
         if (storedFlow.getLayer4Match()== null) {
@@ -900,4 +860,100 @@ public class StatisticsUpdateCommiter implements OpendaylightGroupStatisticsList
         }
         return true;
     }
+
+    private boolean layer3MatchEquals(Layer3Match statsLayer3Match, Layer3Match storedLayer3Match){
+
+        if(statsLayer3Match instanceof Ipv4Match && storedLayer3Match instanceof Ipv4Match){
+            Ipv4Match statsIpv4Match = (Ipv4Match)statsLayer3Match;
+            Ipv4Match storedIpv4Match = (Ipv4Match)storedLayer3Match;
+            
+            if (storedIpv4Match.getIpv4Destination()== null) {
+                if (statsIpv4Match.getIpv4Destination()!= null) {
+                    return false;
+                }
+            } else if(!IpAddressEquals(statsIpv4Match.getIpv4Destination(),storedIpv4Match.getIpv4Destination())){
+                return false;
+            }
+            if (storedIpv4Match.getIpv4Source() == null) {
+                if (statsIpv4Match.getIpv4Source() != null) {
+                    return false;
+                }
+            } else if(!IpAddressEquals(statsIpv4Match.getIpv4Source(),storedIpv4Match.getIpv4Source())) {
+                return false;
+            }
+            
+            return true;
+        }else{
+            return storedLayer3Match.equals(statsLayer3Match);
+        }
+    }
+    
+    private boolean IpAddressEquals(Ipv4Prefix statsIpAddress, Ipv4Prefix storedIpAddress) {
+        IntegerIpAddress statsIpAddressInt = StrIpToIntIp(statsIpAddress.getValue());
+        IntegerIpAddress storedIpAddressInt = StrIpToIntIp(storedIpAddress.getValue());
+
+        if(IpAndMaskBasedMatch(statsIpAddressInt,storedIpAddressInt)){
+            return true;
+        }
+        if(IpBasedMatch(statsIpAddressInt,storedIpAddressInt)){
+            return true;
+        }
+        return false;
+    }
+
+    private boolean IpAndMaskBasedMatch(IntegerIpAddress statsIpAddressInt,IntegerIpAddress storedIpAddressInt){
+        return ((statsIpAddressInt.getIp() & statsIpAddressInt.getMask()) ==  (storedIpAddressInt.getIp() & storedIpAddressInt.getMask()));
+    }
+
+    private boolean IpBasedMatch(IntegerIpAddress statsIpAddressInt,IntegerIpAddress storedIpAddressInt){
+        return (statsIpAddressInt.getIp() == storedIpAddressInt.getIp());
+    }
+    
+    /*
+     * Method return integer version of ip address. Converted int will be mask if 
+     * mask specified
+     */
+    private IntegerIpAddress StrIpToIntIp(String ipAddresss){
+        
+        String[] parts = ipAddresss.split("/");
+        String ip = parts[0];
+        int prefix;
+
+        if (parts.length < 2) {
+            prefix = 32;
+        } else {
+            prefix = Integer.parseInt(parts[1]);
+        }
+
+        Inet4Address addr =null;
+        try {
+            addr = (Inet4Address) InetAddress.getByName(ip);
+        } catch (UnknownHostException e){}
+
+        byte[] addrBytes = addr.getAddress();
+        int ipInt = ((addrBytes[0] & 0xFF) << 24) |
+                         ((addrBytes[1] & 0xFF) << 16) |
+                         ((addrBytes[2] & 0xFF) << 8)  |
+                         ((addrBytes[3] & 0xFF) << 0);
+
+        int mask = 0xffffffff << 32 - prefix;
+
+        return new IntegerIpAddress(ipInt, mask);
+    }
+    
+    class IntegerIpAddress{
+        int ip;
+        int mask;
+        public IntegerIpAddress(int ip, int mask) {
+            this.ip = ip;
+            this.mask = mask;
+        }
+        public int getIp() {
+            return ip;
+        }
+        public int getMask() {
+            return mask;
+        }
+    }
 }
+