org.apache.hadoop.io.compress

Class CodecPool

java.lang.Object

org.apache.hadoop.io.compress.CodecPool

@InterfaceAudience.Public
@InterfaceStability.Evolving
public class CodecPool
extends Object

A global compressor/decompressor pool used to save and reuse (possibly native) compression/decompression codecs.

Constructor Summary

Constructors

Constructor and Description
CodecPool()

Method Summary

Methods

Modifier and Type	Method and Description
static Compressor	getCompressor(CompressionCodec codec)
static Compressor	getCompressor(CompressionCodec codec, Configuration conf) Get a Compressor for the given CompressionCodec from the pool or a new one.
static Decompressor	getDecompressor(CompressionCodec codec) Get a Decompressor for the given CompressionCodec from the pool or a new one.
static int	getLeasedCompressorsCount(CompressionCodec codec) Return the number of leased Compressors for this CompressionCodec
static int	getLeasedDecompressorsCount(CompressionCodec codec) Return the number of leased Decompressors for this CompressionCodec
static void	returnCompressor(Compressor compressor) Return the Compressor to the pool.
static void	returnDecompressor(Decompressor decompressor) Return the Decompressor to the pool.

Methods inherited from class java.lang.Object

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

Constructor Detail

CodecPool

public CodecPool()

Method Detail

getCompressor

public static Compressor getCompressor(CompressionCodec codec,
                       Configuration conf)

Get a Compressor for the given CompressionCodec from the pool or a new one.

Parameters:

codec - the CompressionCodec for which to get the Compressor

conf - the Configuration object which contains confs for creating or reinit the compressor

Returns:

Compressor for the given CompressionCodec from the pool or a new one

getCompressor

public static Compressor getCompressor(CompressionCodec codec)

getDecompressor

public static Decompressor getDecompressor(CompressionCodec codec)

Get a Decompressor for the given CompressionCodec from the pool or a new one.

Parameters:

codec - the CompressionCodec for which to get the Decompressor

Returns:

Decompressor for the given CompressionCodec the pool or a new one

returnCompressor

public static void returnCompressor(Compressor compressor)

Return the Compressor to the pool.

Parameters:

compressor - the Compressor to be returned to the pool

returnDecompressor

public static void returnDecompressor(Decompressor decompressor)

Return the Decompressor to the pool.

Parameters:

decompressor - the Decompressor to be returned to the pool

getLeasedCompressorsCount

public static int getLeasedCompressorsCount(CompressionCodec codec)

Return the number of leased Compressors for this CompressionCodec

getLeasedDecompressorsCount

public static int getLeasedDecompressorsCount(CompressionCodec codec)

Return the number of leased Decompressors for this CompressionCodec