fix format issue and add vector option to properties

Author: hahahahbenny

hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/backend/cache/CachedGraphTransaction.java

@@ -67,7 +67,12 @@ public final class CachedGraphTransaction extends GraphTransaction {
     private EventListener cacheEventListener;
 
     public CachedGraphTransaction(HugeGraphParams graph, BackendStore store) {
-        super(graph, store);
+        this(graph, store, null);
+    }
+
+    public CachedGraphTransaction(HugeGraphParams graph, BackendStore store,
+                                  BackendStore vectorStore) {
+        super(graph, store, vectorStore);
 
         HugeConfig conf = graph.configuration();
 

hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/backend/serializer/VectorBackendEntry.java

@@ -33,16 +33,16 @@
  */
 public class VectorBackendEntry implements BackendEntry {
 
-    // 基础字段（实现BackendEntry接口）
+    // Basic fields (implementing BackendEntry interface)
     private final HugeType type;           // VECTOR_INDEX
-    private final Id id;                   // 索引ID
-    private final Id subId;                // 顶点ID
+    private final Id id;                   // index ID
+    private final Id subId;                // vertex ID
 
-    // 向量核心字段
-    private final String vectorId;         // 向量唯一标识
-    private final float[] vector;          // 向量数据
-    private final String metricType;       // 度量类型 (L2, COSINE, DOT)
-    private final Integer dimension;       // 向量维度
+    // Vector core fields
+    private final String vectorId;         // vector id
+    private final float[] vector;          // vector data
+    private final String metricType;       // metric type (L2, COSINE, DOT)
+    private final Integer dimension;       // vector dimension
 
     public VectorBackendEntry(HugeType type, Id id, Id subId, 
                              String vectorId, float[] vector, 
@@ -56,7 +56,7 @@ public VectorBackendEntry(HugeType type, Id id, Id subId,
         this.dimension = dimension;
     }
 
-    // 实现BackendEntry接口
+    // BackendEntry interface implementation
     @Override
     public HugeType type() { 
         return this.type; 
@@ -79,15 +79,15 @@ public Id subId() {
 
     @Override
     public long ttl() { 
-        return 0L;  // 向量索引不过期
+        return 0L;  // Vector index doesn't expire
     }
 
     @Override
     public boolean olap() { 
-        return false;  // 向量索引不是OLAP数据
+        return false;  // Vector index is not OLAP data
     }
 
-    // 向量特有方法
+    // Vector-specific methods
     public String vectorId() { 
         return this.vectorId; 
     }
@@ -104,7 +104,7 @@ public Integer dimension() {
         return this.dimension; 
     }
 
-    // 为了兼容BackendEntry接口，提供columns方法
+    // For BackendEntry interface compatibility, provide columns method
     @Override
     public Collection<BackendColumn> columns() {
         List<BackendColumn> cols = new ArrayList<>();
@@ -128,7 +128,7 @@ public int columnsSize() {
 
     @Override
     public void columns(Collection<BackendColumn> columns) {
-        // 向量索引不支持动态添加列
+        // Vector index doesn't support dynamic column addition
         throw new UnsupportedOperationException("VectorBackendEntry doesn't support dynamic columns");
     }
 
@@ -144,7 +144,7 @@ public void merge(BackendEntry other) {
 
     @Override
     public boolean mergeable(BackendEntry other) {
-        return false;  // 向量索引不支持合并
+        return false;  // Vector index doesn't support merging
     }
 
     @Override
@@ -154,7 +154,7 @@ public void clear() {
 
     @Override
     public boolean belongToMe(BackendColumn column) {
-        // 向量索引的列都属于自己
+        // All columns of vector index belong to itself
         return true;
     }
 

hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/backend/tx/AbstractTransaction.java

@@ -62,19 +62,26 @@ public abstract class AbstractTransaction implements Transaction {
 
     private final HugeGraphParams graph;
     private final BackendStore store;
+    private final BackendStore vectorStore;
 
     private BackendMutation mutation;
 
     protected final AbstractSerializer serializer;
 
-    public AbstractTransaction(HugeGraphParams graph, BackendStore store) {
+    public AbstractTransaction(HugeGraphParams graph, BackendStore store){
+        this(graph, store, null);
+    }
+
+    public AbstractTransaction(HugeGraphParams graph, BackendStore store,
+                               BackendStore vectorStore) {
         E.checkNotNull(graph, "graph");
         E.checkNotNull(store, "store");
 
         this.graph = graph;
         this.serializer = this.graph.serializer();
 
         this.store = store;
+        this.vectorStore = vectorStore;
         this.reset();
 
         store.open(this.graph.configuration());

hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/backend/tx/GraphTransaction.java

@@ -146,7 +146,11 @@ public class GraphTransaction extends IndexableTransaction {
             new ConcurrentHashMap<>();
 
     public GraphTransaction(HugeGraphParams graph, BackendStore store) {
-        super(graph, store);
+        this(graph, store, null);
+    }
+
+    public GraphTransaction(HugeGraphParams graph, BackendStore store, BackendStore vectorStore) {
+        super(graph, store, vectorStore);
 
         this.indexTx = new GraphIndexTransaction(graph, store);
         assert !this.indexTx.autoCommit();

hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/backend/tx/IndexableTransaction.java

@@ -28,6 +28,11 @@ public IndexableTransaction(HugeGraphParams graph, BackendStore store) {
         super(graph, store);
     }
 
+    public IndexableTransaction(HugeGraphParams graph, BackendStore store,
+                                BackendStore vectorStore) {
+        super(graph, store, vectorStore);
+    }
+
     @Override
     public boolean hasUpdate() {
         AbstractTransaction indexTx = this.indexTransaction();

hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/config/CoreOptions.java

@@ -710,4 +710,18 @@ public static synchronized CoreOptions instance() {
             nonNegativeInt(),
             8L
     );
+
+    public static final ConfigOption<Boolean> VECTOR_ENABLED = new ConfigOption<>(
+            "vector.enabled",
+            "Whether to enable vector index",
+            disallowEmpty(),
+            false
+    );
+
+    public static final ConfigOption<String> VECTOR_BACKEND = new ConfigOption<>(
+            "vector.backend",
+            "vector index backend",
+            disallowEmpty(),
+            "jvector"
+    );
 }

hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/schema/builder/IndexLabelBuilder.java

@@ -533,7 +533,7 @@ private void checkFields(Set<Id> propertyIds) {
         }
 
         // Vector index must build on float list
-        if(this.indexType.isVector()){
+        if (this.indexType.isVector()) {
             E.checkArgument(fields.size() == 1,
                             "vector index can only build on " +
                             "one field, but got %s fields: '%s'",

hugegraph-server/hugegraph-dist/src/assembly/static/conf/graphs/hugegraph.properties

@@ -43,6 +43,12 @@ search.text_analyzer_mode=INDEX
 #rocksdb.data_path=/path/to/disk
 #rocksdb.wal_path=/path/to/disk
 
+#vector backend config
+#vector.enabled=false
+#vector.backend=jvector
+#vector.data_path=/path/to/disk
+#vector.wal_path=/path/to/disk
+
 # hbase backend config
 #hbase.hosts=localhost
 #hbase.port=2181

hugegraph-server/hugegraph-vector/src/main/java/org/apache/hugegraph/backend/store/jvector/VectorFeatures.java

@@ -34,7 +34,6 @@ public boolean supportsScanToken() {
         return false;
     }
 
-
     public boolean supportsDistributed() {
         return false;
     }