Package org.apache.hadoop.io.erasurecode.coder

Interface ErasureCodingStep

All Known Implementing Classes:

ErasureDecodingStep, ErasureEncodingStep, HHErasureCodingStep, HHXORErasureDecodingStep, HHXORErasureEncodingStep

@Private
public interface ErasureCodingStep

Erasure coding step that's involved in encoding/decoding of a block group.

Method Summary

Modifier and Type	Method	Description
void	finish()	Notify erasure coder that all the chunks of input blocks are processed so the coder can be able to update internal states, considering next step.
ECBlock[]	getInputBlocks()	Input blocks of readable data involved in this step, may be data blocks or parity blocks.
ECBlock[]	getOutputBlocks()	Output blocks of writable buffers involved in this step, may be data blocks or parity blocks.
void	performCoding(ECChunk[] inputChunks, ECChunk[] outputChunks)	Perform encoding or decoding given the input chunks, and generated results will be written to the output chunks.

Method Detail

getInputBlocks

ECBlock[] getInputBlocks()

Input blocks of readable data involved in this step, may be data blocks or parity blocks.

Returns:

input blocks

getOutputBlocks

ECBlock[] getOutputBlocks()

Output blocks of writable buffers involved in this step, may be data blocks or parity blocks.

Returns:

output blocks

performCoding

void performCoding(ECChunk[] inputChunks,
                   ECChunk[] outputChunks)
            throws java.io.IOException

Perform encoding or decoding given the input chunks, and generated results will be written to the output chunks.

Parameters:

inputChunks - inputChunks.

outputChunks - outputChunks.

Throws:

java.io.IOException - raised on errors performing I/O.

finish

void finish()

Notify erasure coder that all the chunks of input blocks are processed so the coder can be able to update internal states, considering next step.