com.hadoop.compression.lzo

Class LzopOutputStream

java.lang.Object

java.io.OutputStream

org.apache.hadoop.io.compress.CompressionOutputStream

org.apache.hadoop.io.compress.CompressorStream

com.hadoop.compression.lzo.LzopOutputStream

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable

public class LzopOutputStream
extends org.apache.hadoop.io.compress.CompressorStream

Field Summary

Fields

Modifier and Type	Field and Description
protected DataOutputStream	indexOut

Fields inherited from class org.apache.hadoop.io.compress.CompressorStream

buffer, closed, compressor

Fields inherited from class org.apache.hadoop.io.compress.CompressionOutputStream

out

Constructor Summary

Constructors

Constructor and Description
LzopOutputStream(OutputStream out, org.apache.hadoop.io.compress.Compressor compressor, int bufferSize, LzoCompressor.CompressionStrategy strategy)
LzopOutputStream(OutputStream out, DataOutputStream indexOut, org.apache.hadoop.io.compress.Compressor compressor, int bufferSize, LzoCompressor.CompressionStrategy strategy)

Method Summary

Modifier and Type	Method and Description
void	close() Close the underlying stream and write a null word to the output stream.
protected void	compress()
void	finish()
void	write(byte[] b, int off, int len)
protected static void	writeLzopHeader(OutputStream out, LzoCompressor.CompressionStrategy strategy, int compressionLevel) Write an lzop-compatible header to the OutputStream provided.

Methods inherited from class org.apache.hadoop.io.compress.CompressorStream

resetState, write

Methods inherited from class org.apache.hadoop.io.compress.CompressionOutputStream

flush

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

indexOut

protected DataOutputStream indexOut

Constructor Detail

LzopOutputStream

public LzopOutputStream(OutputStream out,
                        org.apache.hadoop.io.compress.Compressor compressor,
                        int bufferSize,
                        LzoCompressor.CompressionStrategy strategy)
                 throws IOException

Throws:

IOException

LzopOutputStream

public LzopOutputStream(OutputStream out,
                        DataOutputStream indexOut,
                        org.apache.hadoop.io.compress.Compressor compressor,
                        int bufferSize,
                        LzoCompressor.CompressionStrategy strategy)
                 throws IOException

Throws:

IOException

Method Detail

writeLzopHeader

protected static void writeLzopHeader(OutputStream out,
                                      LzoCompressor.CompressionStrategy strategy,
                                      int compressionLevel)
                               throws IOException

Write an lzop-compatible header to the OutputStream provided.

Parameters:

out - OutputStream

strategy - The lzo compression algorithm

compressionLevel - the lzo compression level

Throws:

IOException - if lzop strategy is incompatible

close

public void close()
           throws IOException

Close the underlying stream and write a null word to the output stream.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class org.apache.hadoop.io.compress.CompressorStream

Throws:

IOException

write

public void write(byte[] b,
                  int off,
                  int len)
           throws IOException

Overrides:

write in class org.apache.hadoop.io.compress.CompressorStream

Throws:

IOException

finish

public void finish()
            throws IOException

Overrides:

finish in class org.apache.hadoop.io.compress.CompressorStream

Throws:

IOException

compress

protected void compress()
                 throws IOException

Overrides:

compress in class org.apache.hadoop.io.compress.CompressorStream

Throws:

IOException