org.apache.flink.runtime.state.SnappyStreamCompressionDecorator Maven / Gradle / Ivy
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* 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,
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package org.apache.flink.runtime.state;
import org.apache.flink.annotation.Internal;
import org.apache.flink.runtime.util.NonClosingInputStreamDecorator;
import org.apache.flink.runtime.util.NonClosingOutputStreamDecorator;
import org.xerial.snappy.SnappyFramedInputStream;
import org.xerial.snappy.SnappyFramedOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/** This implementation decorates the stream with snappy compression. */
@Internal
public class SnappyStreamCompressionDecorator extends StreamCompressionDecorator {
public static final StreamCompressionDecorator INSTANCE =
new SnappyStreamCompressionDecorator();
private static final long serialVersionUID = 1L;
private static final int COMPRESSION_BLOCK_SIZE = 64 * 1024;
private static final double MIN_COMPRESSION_RATIO = 0.85d;
@Override
protected OutputStream decorateWithCompression(NonClosingOutputStreamDecorator stream)
throws IOException {
return new SnappyFramedOutputStream(stream, COMPRESSION_BLOCK_SIZE, MIN_COMPRESSION_RATIO);
}
@Override
protected InputStream decorateWithCompression(NonClosingInputStreamDecorator stream)
throws IOException {
return new SnappyFramedInputStream(stream, false);
}
}