src/org/redkale/source/EntityCache.java

@@ -31,7 +31,8 @@ public final class EntityCache<T> {
 
     private final ConcurrentHashMap<Serializable, T> map = new ConcurrentHashMap();
 
-    private final Collection<T> list = new ConcurrentLinkedQueue(); // CopyOnWriteArrayList 插入慢、查询快; 10w数据插入需要3.2秒; ConcurrentLinkedQueue 插入快、查询慢；10w数据查询需要 0.062秒，  查询慢40%;
+    // CopyOnWriteArrayList 插入慢、查询快; 10w数据插入需要3.2秒; ConcurrentLinkedQueue 插入快、查询慢；10w数据查询需要 0.062秒，  查询慢40%;
+    private final Collection<T> list = new ConcurrentLinkedQueue();
 
     private final Map<String, Comparator<T>> sortComparators = new ConcurrentHashMap<>();
 
@@ -56,7 +57,8 @@ public final class EntityCache<T> {
         this.type = info.getType();
         this.creator = info.getCreator();
         this.primary = info.primary;
-        this.needcopy = true;
+        VirtualEntity ve = info.getType().getAnnotation(VirtualEntity.class);
+        this.needcopy = ve == null || !ve.direct();
         this.newReproduce = Reproduce.create(type, type, (m) -> {
             try {
                 return type.getDeclaredField(m).getAnnotation(Transient.class) == null;
@@ -81,10 +83,12 @@ public final class EntityCache<T> {
         if (info.fullloader == null) return;
         clear();
         List<T> all = info.fullloader.apply(type);
+        if (all != null) {
             all.stream().filter(x -> x != null).forEach(x -> {
                 this.map.put(this.primary.get(x), x);
             });
             this.list.addAll(all);
+        }
         this.fullloaded = true;
     }
 

src/org/redkale/source/EntityInfo.java

@@ -123,7 +123,6 @@ public final class EntityInfo<T> {
 
     private EntityInfo(Class<T> type, int nodeid, final boolean cacheForbidden, Properties conf, Function<Class, List> fullloader) {
         this.type = type;
-        this.fullloader = fullloader;
         //---------------------------------------------
         this.nodeid = nodeid >= 0 ? nodeid : 0;
         DistributeTables dt = type.getAnnotation(DistributeTables.class);
@@ -135,7 +134,15 @@ public final class EntityInfo<T> {
         Table t = type.getAnnotation(Table.class);
         if (type.getAnnotation(VirtualEntity.class) != null) {
             this.table = null;
+            Function<Class, List> loader = null;
+            try {
+                loader = type.getAnnotation(VirtualEntity.class).loader().newInstance();
+            } catch (Exception e) {
+                logger.severe(type + " init @VirtualEntity.loader error", e);
+            }
+            this.fullloader = loader;
         } else {
+            this.fullloader = fullloader;
             this.table = (t == null) ? type.getSimpleName().toLowerCase() : (t.catalog().isEmpty()) ? t.name() : (t.catalog() + '.' + t.name());
         }
         this.creator = Creator.create(type);
@@ -180,8 +187,10 @@ public final class EntityInfo<T> {
 //                    }
                     DistributeGenerator dg = field.getAnnotation(DistributeGenerator.class);
                     if (dg != null) {
-                        if (!field.getType().isPrimitive())
+                        if (!field.getType().isPrimitive()) {
-                            throw new RuntimeException(cltmp.getName() + "'s @" + DistributeGenerator.class.getSimpleName() + " primary must be primitive class type field");
+                            throw new RuntimeException(cltmp.getName() + "'s @"
+                                + DistributeGenerator.class.getSimpleName() + " primary must be primitive class type field");
+                        }
                         sqldistribute = true;
                         auto = false;
                         allocationSize0 = dg.allocationSize();

src/org/redkale/source/VirtualEntity.java

@@ -8,6 +8,8 @@ package org.redkale.source;
 import static java.lang.annotation.ElementType.TYPE;
 import static java.lang.annotation.RetentionPolicy.RUNTIME;
 import java.lang.annotation.*;
+import java.util.*;
+import java.util.function.*;
 
 /**
  * VirtualEntity表示虚拟的数据实体类， 通常Entity都会映射到数据库中的某个表，而标记为VirtualEntity的Entity类只存在DataCache中
@@ -22,4 +24,17 @@ import java.lang.annotation.*;
 @Retention(RUNTIME)
 public @interface VirtualEntity {
 
+    //DataSource是否直接返回对象的真实引用， 而不是copy一份
+    boolean direct() default false;
+
+    //初始化时数据的加载器
+    Class<? extends Function< Class, List>> loader() default DefaultFunctionLoader.class;
+
+    public static class DefaultFunctionLoader implements Function< Class, List> {
+
+        @Override
+        public List apply(Class u) {
+            return null;
+        }
+    }
 }