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.authentication;
  
  import javax.annotation.concurrent.ThreadSafe;
  
  /**
   * Different authentication types for Alluxio.
   */
  @ThreadSafe
  public enum AuthType {
    /**
     * Authentication is disabled. No user info in Alluxio.
     */
    NOSASL,
  
    /**
     * User is aware in Alluxio. On the client side, the login username is determined by the
     * "alluxio.security.login.username" property, or the OS user upon failure.
     * On the server side, the verification of client user is disabled.
     */
    SIMPLE,
  
    /**
     * User is aware in Alluxio. On the client side, the login username is determined by the
     * "alluxio.security.login.username" property, or the OS user upon failure.
     * On the server side, the user is verified by a Custom authentication provider
     * (Specified by property "alluxio.security.authentication.custom.provider.class").
     */
    CUSTOM,
  
    /**
     * User is aware in Alluxio. The user is verified by Kerberos authentication. NOTE: this
     * authentication is not supported.
     */
    KERBEROS,
    ;
  }
  