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 alluxio.grpc.SaslMessage;
  
  import javax.security.sasl.SaslClient;
  import javax.security.sasl.SaslException;
  
  /**
   * Interface for authentication scheme specific {@link SaslClient} management.
   */
  public interface SaslClientHandler extends AutoCloseable {
    /**
     * Handles the given {@link SaslMessage} from the server.
     *
     * @param message server-side Sasl message to handle
     * @return client's answer. null if client is completed
     * @throws SaslException
     */
    SaslMessage handleMessage(SaslMessage message) throws SaslException;
  
    /**
     * Close the handler and dispose internal resources.
     */
    @Override
    void close();
  }
  