yuqi1129 commented on code in PR #8297:
URL: https://github.com/apache/gravitino/pull/8297#discussion_r2314728445


##########
build.gradle.kts:
##########
@@ -564,9 +569,9 @@ subprojects {
       exclude("test/**")
     }
   }
-  tasks.named("compileJava").configure {
-    dependsOn("spotlessCheck")
-  }
+//  tasks.named("compileJava").configure {

Review Comment:
   Please remove it if it's unused.



##########
core/src/main/java/org/apache/gravitino/cache/CaffeineEntityCache.java:
##########
@@ -331,18 +346,66 @@ private <KEY, VALUE> Caffeine<KEY, VALUE> 
newBaseBuilder(Config cacheConfig) {
   }
 
   /**
-   * Invalidates the entities by the given cache key.
+   * Invalidate entities with iterative BFS algorithm.
    *
    * @param identifier The identifier of the entity to invalidate
    */
-  private boolean invalidateEntities(NameIdentifier identifier) {
-    List<EntityCacheKey> entityKeysToRemove =
-        
Lists.newArrayList(cacheIndex.getValuesForKeysStartingWith(identifier.toString()));
+  private boolean invalidateEntities(
+      NameIdentifier identifier,
+      Entity.EntityType type,
+      Optional<SupportsRelationOperations.Type> relTypeOpt) {
+    Queue<EntityCacheKey> queue = new ArrayDeque<>();
 
-    cacheData.invalidateAll(entityKeysToRemove);
-    entityKeysToRemove.forEach(key -> cacheIndex.remove(key.toString()));
+    EntityCacheKey valueForExactKey;
+    if (relTypeOpt.isEmpty()) {
+      valueForExactKey =
+          cacheIndex.getValueForExactKey(EntityCacheKey.of(identifier, 
type).toString());
+    } else {
+      valueForExactKey =
+          cacheIndex.getValueForExactKey(
+              EntityCacheRelationKey.of(identifier, type, 
relTypeOpt.get()).toString());
+    }
+
+    if (valueForExactKey == null) {
+      // No key to remove
+      return false;
+    }
+
+    queue.offer(valueForExactKey);
+
+    while (!queue.isEmpty()) {
+      EntityCacheKey currentKeyToRemove = queue.poll();
+
+      cacheData.invalidate(currentKeyToRemove);
+      cacheIndex.remove(currentKeyToRemove.toString());
+
+      // Remove related entity keys
+      List<EntityCacheKey> relatedEntityKeysToRemove =
+          Lists.newArrayList(
+              
cacheIndex.getValuesForKeysStartingWith(currentKeyToRemove.identifier().toString()));
+      relatedEntityKeysToRemove.forEach(queue::offer);

Review Comment:
   queue.addAll



##########
core/src/main/java/org/apache/gravitino/cache/CaffeineEntityCache.java:
##########
@@ -331,18 +346,66 @@ private <KEY, VALUE> Caffeine<KEY, VALUE> 
newBaseBuilder(Config cacheConfig) {
   }
 
   /**
-   * Invalidates the entities by the given cache key.
+   * Invalidate entities with iterative BFS algorithm.
    *
    * @param identifier The identifier of the entity to invalidate
    */
-  private boolean invalidateEntities(NameIdentifier identifier) {
-    List<EntityCacheKey> entityKeysToRemove =
-        
Lists.newArrayList(cacheIndex.getValuesForKeysStartingWith(identifier.toString()));
+  private boolean invalidateEntities(
+      NameIdentifier identifier,
+      Entity.EntityType type,
+      Optional<SupportsRelationOperations.Type> relTypeOpt) {
+    Queue<EntityCacheKey> queue = new ArrayDeque<>();
 
-    cacheData.invalidateAll(entityKeysToRemove);
-    entityKeysToRemove.forEach(key -> cacheIndex.remove(key.toString()));
+    EntityCacheKey valueForExactKey;
+    if (relTypeOpt.isEmpty()) {
+      valueForExactKey =
+          cacheIndex.getValueForExactKey(EntityCacheKey.of(identifier, 
type).toString());
+    } else {
+      valueForExactKey =
+          cacheIndex.getValueForExactKey(
+              EntityCacheRelationKey.of(identifier, type, 
relTypeOpt.get()).toString());
+    }

Review Comment:
   ```
   String entityCacheKeyString = relTypeOpt.isEmpty() ? 
EntityCacheKey.of(identifier, type).toString() : 
EntityCacheRelationKey.of(identifier, type, relTypeOpt.get()).toString();
   
   valueForExactKey = cacheIndex.getValueForExactKey
   ```



##########
core/src/main/java/org/apache/gravitino/cache/ReverseIndexRules.java:
##########
@@ -0,0 +1,112 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.gravitino.cache;
+
+import org.apache.gravitino.Entity;
+import org.apache.gravitino.NameIdentifier;
+import org.apache.gravitino.Namespace;
+import org.apache.gravitino.meta.GroupEntity;
+import org.apache.gravitino.meta.RoleEntity;
+import org.apache.gravitino.meta.UserEntity;
+import org.apache.gravitino.utils.NamespaceUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Reverse index rules for different entity types. This class defines how to 
process reverse
+ * indexing for UserEntity, GroupEntity, and RoleEntity. <br>
+ * For example: - UserEntity role is 
{metalake-name}.system.user.{user-name}:USER-{serial-number} -
+ * UserEntity role is 
{metalake-name}.system.group.{group-name}:GROUP-{serial-number} - RoleEntity
+ * role is {metalake-name}.system.role.{role-name}:ROLE-{serial-number} - 
{serial-number}: Because
+ */
+public class ReverseIndexRules {
+  private static final Logger LOG = 
LoggerFactory.getLogger(ReverseIndexRules.class.getName());
+
+  /** UserEntity reverse index processor */
+  public static final ReverseIndexCache.ReverseIndexRule USER_REVERSE_RULE =
+      (entity, key, reverseIndexCache) -> {
+        UserEntity userEntity = (UserEntity) entity;
+        if (userEntity.roleNames() != null) {
+          userEntity
+              .roleNames()
+              .forEach(
+                  role -> {
+                    Namespace ns = 
NamespaceUtil.ofRole(userEntity.namespace().level(0));
+                    NameIdentifier nameIdentifier = NameIdentifier.of(ns, 
role);
+                    reverseIndexCache.put(nameIdentifier, 
Entity.EntityType.ROLE, key);
+                  });
+        }
+      };
+
+  /** GroupEntity reverse index processor */
+  public static final ReverseIndexCache.ReverseIndexRule GROUP_REVERSE_RULE =
+      (entity, key, reverseIndexCache) -> {
+        GroupEntity groupEntity = (GroupEntity) entity;
+        if (groupEntity.roleNames() != null) {
+          groupEntity
+              .roleNames()
+              .forEach(
+                  role -> {
+                    Namespace ns = 
NamespaceUtil.ofRole(groupEntity.namespace().level(0));
+                    NameIdentifier nameIdentifier = NameIdentifier.of(ns, 
role);
+                    reverseIndexCache.put(nameIdentifier, 
Entity.EntityType.ROLE, key);
+                  });
+        }
+      };
+
+  /** * RoleEntity reverse index processor */
+  public static final ReverseIndexCache.ReverseIndexRule ROLE_REVERSE_RULE =
+      (entity, key, reverseIndexCache) -> {
+        RoleEntity roleEntity = (RoleEntity) entity;
+        if (roleEntity.securableObjects() != null) {
+          roleEntity
+              .securableObjects()
+              .forEach(
+                  securableObject -> {
+                    Namespace namespace = Namespace.empty();
+                    Entity.EntityType entityType = Entity.EntityType.METALAKE;
+                    switch (securableObject.type()) {
+                      case METALAKE:
+                        entityType = Entity.EntityType.METALAKE;
+                        namespace = NamespaceUtil.ofMetalake();
+                        break;
+                      case CATALOG:
+                        entityType = Entity.EntityType.CATALOG;
+                        namespace = 
NamespaceUtil.ofCatalog(roleEntity.namespace().level(0));
+                        break;
+                      case FILESET:
+                        entityType = Entity.EntityType.FILESET;
+                        Namespace nsParent = 
Namespace.fromString(securableObject.parent());
+                        namespace =
+                            NamespaceUtil.ofFileset(
+                                roleEntity.namespace().level(0),
+                                nsParent.level(0),
+                                nsParent.level(1));
+                        break;
+                      default:

Review Comment:
   cc @xunliu 



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