/*
 * 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.hadoop.ozone.container.replication;

import java.io.Closeable;
import java.nio.file.Path;
import java.util.List;
import org.apache.hadoop.hdds.protocol.DatanodeDetails;

/**
 * Service to download container data from other datanodes.
 * <p>
 * The implementation of this interface should copy the raw container data in
 * compressed form to working directory.
 * <p>
 * A smart implementation would use multiple sources to do parallel download.
 */
public interface ContainerDownloader extends Closeable {

  Path getContainerDataFromReplicas(long containerId,
      List<DatanodeDetails> sources, Path downloadDir,
      CopyContainerCompression compression);

}
