org.apache.hadoop.io.compress
Class CodecPool

java.lang.Object
  extended by 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
CodecPool()
           
 
Method Summary
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



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