Less record logic instances created

now creates one per database as opposed to one per transaction.
Classes like: RelationshipCreator, RelationshipDeletor and PropertyTraverser.

community/kernel/src/main/java/org/neo4j/kernel/impl/storageengine/impl/recordstorage/RecordStorageEngine.java

@@ -28,6 +28,7 @@
 
 import org.neo4j.concurrent.WorkSync;
 import org.neo4j.graphdb.config.Setting;
+import org.neo4j.graphdb.factory.GraphDatabaseSettings;
 import org.neo4j.io.fs.FileSystemAbstraction;
 import org.neo4j.io.pagecache.PageCache;
 import org.neo4j.kernel.impl.store.id.IdGeneratorFactory;
@@ -80,8 +81,14 @@
 import org.neo4j.kernel.impl.transaction.state.IntegrityValidator;
 import org.neo4j.kernel.impl.transaction.state.Loaders;
 import org.neo4j.kernel.impl.transaction.state.NeoStoreIndexStoreView;
-import org.neo4j.kernel.impl.transaction.state.NeoStoreTransactionContext;
+import org.neo4j.kernel.impl.transaction.state.PropertyCreator;
+import org.neo4j.kernel.impl.transaction.state.PropertyDeleter;
 import org.neo4j.kernel.impl.transaction.state.PropertyLoader;
+import org.neo4j.kernel.impl.transaction.state.PropertyTraverser;
+import org.neo4j.kernel.impl.transaction.state.RecordChangeSet;
+import org.neo4j.kernel.impl.transaction.state.RelationshipCreator;
+import org.neo4j.kernel.impl.transaction.state.RelationshipDeleter;
+import org.neo4j.kernel.impl.transaction.state.RelationshipGroupGetter;
 import org.neo4j.kernel.impl.transaction.state.TransactionRecordState;
 import org.neo4j.kernel.impl.util.DependencySatisfier;
 import org.neo4j.kernel.impl.util.IdOrderingQueue;
@@ -146,6 +153,10 @@ public class RecordStorageEngine implements StorageEngine, Lifecycle
 
     // Immutable state for creating/applying commands
     private final Loaders loaders;
+    private final RelationshipCreator relationshipCreator;
+    private final RelationshipDeleter relationshipDeleter;
+    private final PropertyCreator propertyCreator;
+    private final PropertyDeleter propertyDeleter;
 
     public RecordStorageEngine(
             File storeDir,
@@ -216,6 +227,14 @@ public RecordStorageEngine(
 
             // Immutable state for creating/applying commands
             loaders = new Loaders( neoStores );
+            RelationshipGroupGetter relationshipGroupGetter =
+                    new RelationshipGroupGetter( neoStores.getRelationshipGroupStore() );
+            relationshipCreator = new RelationshipCreator( relationshipGroupGetter,
+                    config.get( GraphDatabaseSettings.dense_node_threshold ) );
+            PropertyTraverser propertyTraverser = new PropertyTraverser();
+            propertyDeleter = new PropertyDeleter( neoStores.getPropertyStore(), propertyTraverser );
+            relationshipDeleter = new RelationshipDeleter( relationshipGroupGetter, propertyDeleter );
+            propertyCreator = new PropertyCreator( neoStores.getPropertyStore(), propertyTraverser );
         }
         catch ( Throwable failure )
         {
@@ -260,9 +279,10 @@ public void createCommands(
     {
         if ( txState != null )
         {
-            NeoStoreTransactionContext context = new NeoStoreTransactionContext( neoStores, loaders, locks );
-            TransactionRecordState recordState = new TransactionRecordState( neoStores, integrityValidator, context );
-            recordState.initialize( lastTransactionIdWhenStarted );
+            RecordChangeSet recordChangeSet = new RecordChangeSet( loaders );
+            TransactionRecordState recordState = new TransactionRecordState( neoStores, integrityValidator,
+                    recordChangeSet, lastTransactionIdWhenStarted, locks,
+                    relationshipCreator, relationshipDeleter, propertyCreator, propertyDeleter );
 
             // Visit transaction state and populate these record state objects
             TxStateVisitor txStateVisitor = new TransactionToRecordStateVisitor( recordState,

community/kernel/src/main/java/org/neo4j/kernel/impl/transaction/state/RecordAccessSet.java

@@ -52,5 +52,7 @@ public interface RecordAccessSet
 
     boolean hasChanges();
 
+    int changeSize();
+
     void close();
 }

community/kernel/src/main/java/org/neo4j/kernel/impl/transaction/state/RecordChangeSet.java

@@ -132,6 +132,12 @@ public boolean hasChanges()
         return changeCounter.value() > 0;
     }
 
+    @Override
+    public int changeSize()
+    {
+        return changeCounter.value();
+    }
+
     @Override
     public void close()
     {