content: /*
   * 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.cassandra.sidecar.acl.authorization;
  
  import com.google.inject.Inject;
  import io.vertx.core.Vertx;
  import org.apache.cassandra.sidecar.acl.AuthCache;
  import org.apache.cassandra.sidecar.concurrent.ExecutorPools;
  import org.apache.cassandra.sidecar.config.SidecarConfiguration;
  import org.apache.cassandra.sidecar.db.SystemAuthDatabaseAccessor;
  import org.apache.cassandra.sidecar.metrics.SidecarMetrics;
  
  /**
   * Caches superuser status of cassandra roles. Returns true if the supplied role or any other role granted to it
   * (directly or indirectly) has superuser status.
   * Note: {@link SuperUserCache} maintains only the superuser status. It can not guarantee whether a role exists
   */
  public class SuperUserCache extends AuthCache<String, Boolean>
  {
      private static final String NAME = "super_user_cache";
  
      @Inject
      public SuperUserCache(Vertx vertx,
                            ExecutorPools executorPools,
                            SidecarConfiguration sidecarConfiguration,
                            SystemAuthDatabaseAccessor systemAuthDatabaseAccessor,
                            SidecarMetrics sidecarMetrics)
      {
          super(NAME,
                vertx,
                executorPools,
                systemAuthDatabaseAccessor::isSuperUser,
                systemAuthDatabaseAccessor::findAllRolesToSuperuserStatus,
                sidecarConfiguration.accessControlConfiguration().permissionCacheConfiguration(),
                sidecarMetrics.server().cache().superUserCacheMetrics);
      }
  
      public boolean isSuperUser(String role)
      {
          Boolean superUserStatus = get(role);
          return superUserStatus != null && superUserStatus;
      }
  }
  