with optimization ish

Netflix · Oct 25, 2024 · 585a349 · 585a349
1 parent a4568a7
commit 585a349
Showing 12 changed files with 299 additions and 83 deletions.
diff --git a/hollow/src/main/java/com/netflix/hollow/core/write/objectmapper/HollowListTypeMapper.java b/hollow/src/main/java/com/netflix/hollow/core/write/objectmapper/HollowListTypeMapper.java
@@ -24,9 +24,8 @@
 import com.netflix.hollow.core.write.HollowListWriteRecord;
 import com.netflix.hollow.core.write.HollowTypeWriteState;
 import com.netflix.hollow.core.write.HollowWriteRecord;
+import com.netflix.hollow.core.write.objectmapper.flatrecords.FlatRecordOrdinalReader;
 import com.netflix.hollow.core.write.objectmapper.flatrecords.FlatRecordWriter;
-import com.netflix.hollow.core.write.objectmapper.flatrecords.traversal.FlatRecordTraversalListNode;
-import com.netflix.hollow.core.write.objectmapper.flatrecords.traversal.FlatRecordTraversalNode;
 
 import java.lang.reflect.ParameterizedType;
 import java.lang.reflect.Type;
@@ -126,14 +125,15 @@ protected Object parseHollowRecord(HollowRecord record) {
     }
 
     @Override
-    protected Object parseFlatRecord(FlatRecordTraversalNode node) {
-        List<Object> collection = new ArrayList<>();
-
-        for (FlatRecordTraversalNode elementNode : (FlatRecordTraversalListNode) node) {
-            Object element = elementMapper.parseFlatRecord(elementNode);
+    protected Object parseFlatRecord(FlatRecordOrdinalReader reader, int ordinal) {
+        FlatRecordOrdinalReader.Offset offset = reader.getOffsetAtDataStartOf(ordinal);
+        int size = reader.readSize(offset);
+        List<Object> collection = new ArrayList<>(size);
+        for (int i = 0; i < size; i++) {
+            int elementOrdinal = reader.readListElementOrdinal(offset);
+            Object element = elementMapper.parseFlatRecord(reader, elementOrdinal);
             collection.add(element);
         }
-
         return collection;
     }
 

diff --git a/hollow/src/main/java/com/netflix/hollow/core/write/objectmapper/HollowMapTypeMapper.java b/hollow/src/main/java/com/netflix/hollow/core/write/objectmapper/HollowMapTypeMapper.java
@@ -25,9 +25,8 @@
 import com.netflix.hollow.core.write.HollowTypeWriteState;
 import com.netflix.hollow.core.write.HollowWriteRecord;
 import com.netflix.hollow.core.write.HollowWriteStateEngine;
+import com.netflix.hollow.core.write.objectmapper.flatrecords.FlatRecordOrdinalReader;
 import com.netflix.hollow.core.write.objectmapper.flatrecords.FlatRecordWriter;
-import com.netflix.hollow.core.write.objectmapper.flatrecords.traversal.FlatRecordTraversalMapNode;
-import com.netflix.hollow.core.write.objectmapper.flatrecords.traversal.FlatRecordTraversalNode;
 
 import java.lang.reflect.ParameterizedType;
 import java.lang.reflect.Type;
@@ -140,13 +139,18 @@ protected Object parseHollowRecord(HollowRecord record) {
     }
 
     @Override
-    protected Object parseFlatRecord(FlatRecordTraversalNode node) {
-        FlatRecordTraversalMapNode mapNode = (FlatRecordTraversalMapNode) node;
-        Map<Object, Object> collection = new HashMap<>();
-
-        for (Map.Entry<FlatRecordTraversalNode, FlatRecordTraversalNode> entry : mapNode.entrySet()) {
-            Object key = keyMapper.parseFlatRecord(entry.getKey());
-            Object value = valueMapper.parseFlatRecord(entry.getValue());
+    protected Object parseFlatRecord(FlatRecordOrdinalReader reader, int ordinal) {
+        FlatRecordOrdinalReader.Offset offset = reader.getOffsetAtDataStartOf(ordinal);
+        int size = reader.readSize(offset);
+        Map<Object, Object> collection = new HashMap<>(size);
+        int keyOrdinal = 0;
+        for (int i = 0; i < size; i++) {
+            long keyOrdinalDeltaAndValueOrdinal = reader.readMapKeyOrdinalDeltaAndValueOrdinal(offset);
+            keyOrdinal += (int) (keyOrdinalDeltaAndValueOrdinal >>> 32);
+            int valueOrdinal = (int) keyOrdinalDeltaAndValueOrdinal;
+
+            Object key = keyMapper.parseFlatRecord(reader, keyOrdinal);
+            Object value = valueMapper.parseFlatRecord(reader, valueOrdinal);
             collection.put(key, value);
         }
         return collection;

diff --git a/hollow/src/main/java/com/netflix/hollow/core/write/objectmapper/HollowObjectMapper.java b/hollow/src/main/java/com/netflix/hollow/core/write/objectmapper/HollowObjectMapper.java
@@ -20,6 +20,7 @@
 import com.netflix.hollow.core.schema.HollowSchema;
 import com.netflix.hollow.core.write.HollowWriteStateEngine;
 import com.netflix.hollow.core.write.objectmapper.flatrecords.FlatRecord;
+import com.netflix.hollow.core.write.objectmapper.flatrecords.FlatRecordOrdinalReader;
 import com.netflix.hollow.core.write.objectmapper.flatrecords.FlatRecordReader;
 import com.netflix.hollow.core.write.objectmapper.flatrecords.FlatRecordWriter;
 import com.netflix.hollow.core.write.objectmapper.flatrecords.traversal.FlatRecordTraversalNode;
@@ -100,13 +101,20 @@ public <T> T readFlat(FlatRecordTraversalNode node) {
         if (typeMapper == null) {
             throw new IllegalArgumentException("No type mapper found for schema " + schemaName);
         }
-        Object obj = typeMapper.parseFlatRecord(node);
+        Object obj = typeMapper.parseFlatRecord(node.getReader(), node.getOrdinal());
         return (T) obj;
     }
 
     public <T> T readFlat(FlatRecord record) {
-        FlatRecordTraversalNode node = new FlatRecordTraversalObjectNode(record);
-        return readFlat(node);
+        FlatRecordOrdinalReader reader = new FlatRecordOrdinalReader(record);
+        int ordinal = reader.getOrdinalCount() - 1;
+        HollowSchema schema = reader.readSchema(ordinal);
+        HollowTypeMapper typeMapper = typeMappers.get(schema.getName());
+        if (typeMapper == null) {
+            throw new IllegalArgumentException("No type mapper found for schema " + schema.getName());
+        }
+        Object obj = typeMapper.parseFlatRecord(reader, ordinal);
+        return (T) obj;
     }
 
     /**