Package org.apache.hadoop.io.erasurecode.rawcoder

Class DummyRawDecoder

java.lang.Object

org.apache.hadoop.io.erasurecode.rawcoder.RawErasureDecoder

org.apache.hadoop.io.erasurecode.rawcoder.DummyRawDecoder

@Private
public class DummyRawDecoder
extends RawErasureDecoder

A dummy raw decoder that does no real computation. Instead, it just returns zero bytes. This decoder can be used to isolate the performance issue to HDFS side logic instead of codec, and is intended for test only.

Constructor Summary

Constructors

Constructor	Description
DummyRawDecoder(ErasureCoderOptions coderOptions)

Method Summary

Modifier and Type	Method	Description
protected void	doDecode(org.apache.hadoop.io.erasurecode.rawcoder.ByteArrayDecodingState decodingState)	Perform the real decoding using bytes array, supporting offsets and lengths.
protected void	doDecode(org.apache.hadoop.io.erasurecode.rawcoder.ByteBufferDecodingState decodingState)	Perform the real decoding using Direct ByteBuffer.

Methods inherited from class org.apache.hadoop.io.erasurecode.rawcoder.RawErasureDecoder

allowChangeInputs, allowVerboseDump, decode, decode, decode, getNumAllUnits, getNumDataUnits, getNumParityUnits, preferDirectBuffer, release

Methods inherited from class java.lang.Object

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

Constructor Detail

DummyRawDecoder

public DummyRawDecoder(ErasureCoderOptions coderOptions)

Method Detail

doDecode

protected void doDecode(org.apache.hadoop.io.erasurecode.rawcoder.ByteBufferDecodingState decodingState)

Description copied from class: RawErasureDecoder

Perform the real decoding using Direct ByteBuffer.

Specified by:

doDecode in class RawErasureDecoder

Parameters:

decodingState - the decoding state

doDecode

protected void doDecode(org.apache.hadoop.io.erasurecode.rawcoder.ByteArrayDecodingState decodingState)

Description copied from class: RawErasureDecoder

Perform the real decoding using bytes array, supporting offsets and lengths.

Specified by:

doDecode in class RawErasureDecoder

Parameters:

decodingState - the decoding state