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/*
 * Copyright (c) 2010-2012 Sonatype, Inc. All rights reserved.
 *
 * This program is licensed to you under the Apache License Version 2.0,
 * and you may not use this file except in compliance with the Apache License Version 2.0.
 * You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0.
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the Apache License Version 2.0 is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
 */

package org.asynchttpclient.extras.simple;

import java.io.IOException;

/**
 * @author Benjamin Hanzelmann
 */
public interface ResumableBodyConsumer extends BodyConsumer {

  /**
   * Prepare this consumer to resume a download, for example by seeking to the end of the underlying file.
   *
   * @throws IOException IO exception
   */
  void resume() throws IOException;

  /**
   * Get the previously transferred bytes, for example the current file size.
   *
   * @return the number of transferred bytes
   * @throws IOException IO exception
   */
  long getTransferredBytes() throws IOException;
}