content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.security.user;
  
  import alluxio.conf.AlluxioConfiguration;
  
  import javax.security.auth.Subject;
  
  /**
   * A factory for creating new UserState instances.
   */
  public interface UserStateFactory {
    /**
     * @param subject the subject
     * @param conf the configuration
     * @param isServer true if this is from a server process, false otherwise
     * @return a UserState, or null if this UserState is not supported
     */
    UserState create(Subject subject, AlluxioConfiguration conf, boolean isServer);
  }
  