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.beam.sdk.util;
  
  import java.io.IOException;
  import java.io.Serializable;
  import java.util.List;
  import org.apache.beam.sdk.annotations.Internal;
  
  /**
   * Bare-bones class for using sharded files.
   *
   * <p>For internal use only; used only in SDK tests. Must be {@link Serializable} so it can be
   * shipped as a {@link org.apache.beam.sdk.testing.SerializableMatcher}.
   */
  @Internal
  public interface ShardedFile extends Serializable {
  
    /**
     * Reads the lines from all shards of this file using the provided {@link Sleeper} and {@link
     * BackOff}.
     */
    List<String> readFilesWithRetries(Sleeper sleeper, BackOff backOff)
        throws IOException, InterruptedException;
  }
  