/**
* Copyright 2013 Netflix, Inc.
*
* Licensed 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 com.netflix.priam.compress;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Iterator;
import org.apache.commons.io.IOUtils;
import org.xerial.snappy.SnappyInputStream;
/**
* Class to generate compressed chunks of data from an input stream using
* SnappyCompression
*/
public class SnappyCompression implements ICompression
{
private static final int BUFFER = 2 * 1024;
@Override
public Iterator<byte[]> compress(InputStream is, long chunkSize) throws IOException
{
return new ChunkedStream(is, chunkSize);
}
@Override
public void decompressAndClose(InputStream input, OutputStream output) throws IOException
{
try
{
decompress(input, output);
}
finally
{
IOUtils.closeQuietly(input);
IOUtils.closeQuietly(output);
}
}
private void decompress(InputStream input, OutputStream output) throws IOException
{
SnappyInputStream is = new SnappyInputStream(new BufferedInputStream(input));
byte data[] = new byte[BUFFER];
BufferedOutputStream dest1 = new BufferedOutputStream(output, BUFFER);
try
{
int c;
while ((c = is.read(data, 0, BUFFER)) != -1)
{
dest1.write(data, 0, c);
}
}
finally
{
IOUtils.closeQuietly(dest1);
IOUtils.closeQuietly(is);
}
}
}