io.airlift.compress.snappy

Class SnappyFramedOutputStream

java.lang.Object

java.io.OutputStream

io.airlift.compress.snappy.SnappyFramedOutputStream

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable

public final class SnappyFramedOutputStream
extends OutputStream

Implements the x-snappy-framed as an OutputStream.

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_BLOCK_SIZE
static double	DEFAULT_MIN_COMPRESSION_RATIO
static int	MAX_BLOCK_SIZE We place an additional restriction that the uncompressed data in a chunk must be no longer than 65536 bytes.

Constructor Summary

Constructors

Constructor and Description
SnappyFramedOutputStream(OutputStream out) Creates a Snappy output stream to write data to the specified underlying output stream.
SnappyFramedOutputStream(OutputStream out, boolean writeChecksums, int blockSize, double minCompressionRatio)

Method Summary

Modifier and Type	Method and Description
void	close()
void	flush()
static SnappyFramedOutputStream	newChecksumFreeBenchmarkOutputStream(OutputStream out) Creates a Snappy output stream with block checksums disabled.
void	write(byte[] input, int offset, int length)
void	write(int b)

Methods inherited from class java.io.OutputStream

write

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAX_BLOCK_SIZE

public static final int MAX_BLOCK_SIZE

We place an additional restriction that the uncompressed data in a chunk must be no longer than 65536 bytes. This allows consumers to easily use small fixed-size buffers.

See Also:

Constant Field Values

DEFAULT_BLOCK_SIZE

public static final int DEFAULT_BLOCK_SIZE

See Also:

Constant Field Values

DEFAULT_MIN_COMPRESSION_RATIO

public static final double DEFAULT_MIN_COMPRESSION_RATIO

See Also:

Constant Field Values

Constructor Detail

SnappyFramedOutputStream

public SnappyFramedOutputStream(OutputStream out)
                         throws IOException

Creates a Snappy output stream to write data to the specified underlying output stream.

Parameters:

out - the underlying output stream

Throws:

IOException

SnappyFramedOutputStream

public SnappyFramedOutputStream(OutputStream out,
                                boolean writeChecksums,
                                int blockSize,
                                double minCompressionRatio)
                         throws IOException

Throws:

IOException

Method Detail

newChecksumFreeBenchmarkOutputStream

public static SnappyFramedOutputStream newChecksumFreeBenchmarkOutputStream(OutputStream out)
                                                                     throws IOException

Creates a Snappy output stream with block checksums disabled. This is only useful for apples-to-apples benchmarks with other compressors that do not perform block checksums.

Parameters:

out - the underlying output stream

Throws:

IOException

write

public void write(int b)
           throws IOException

Specified by:

write in class OutputStream

Throws:

IOException

write

public void write(byte[] input,
                  int offset,
                  int length)
           throws IOException

Overrides:

write in class OutputStream

Throws:

IOException

flush

public void flush()
           throws IOException

Specified by:

flush in interface Flushable

Overrides:

flush in class OutputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class OutputStream

Throws:

IOException