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.util.compression;
  
  import alluxio.conf.Configuration;
  import alluxio.conf.PropertyKey;
  
  import org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream;
  import org.apache.commons.compress.compressors.gzip.GzipCompressorOutputStream;
  import org.apache.commons.compress.compressors.gzip.GzipParameters;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.nio.file.Path;
  
  /**
   * Applies a simple Gzip compression to the {@link NoCompressionMarshaller}.
   */
  public class GzipMarshaller implements DirectoryMarshaller {
    private final int mSnapshotCompressionLevel = Configuration.getInt(
        PropertyKey.MASTER_EMBEDDED_JOURNAL_SNAPSHOT_REPLICATION_COMPRESSION_LEVEL);
    private final NoCompressionMarshaller mMarshaller = new NoCompressionMarshaller();
  
    @Override
    public long write(Path path, OutputStream outputStream) throws IOException, InterruptedException {
      GzipParameters params = new GzipParameters();
      params.setCompressionLevel(mSnapshotCompressionLevel);
      GzipCompressorOutputStream zipStream = new GzipCompressorOutputStream(outputStream, params);
      long bytes = mMarshaller.write(path, zipStream);
      zipStream.finish();
      return bytes;
    }
  
    @Override
    public long read(Path path, InputStream inputStream) throws IOException {
      InputStream zipStream = new GzipCompressorInputStream(inputStream);
      return mMarshaller.read(path, zipStream);
    }
  }
  