Package org.apache.hadoop.io.erasurecode

Class ECBlock

java.lang.Object

org.apache.hadoop.io.erasurecode.ECBlock

@Private
public class ECBlock
extends java.lang.Object

A wrapper of block level data source/output that ECChunks can be extracted from. For HDFS, it can be an HDFS block (250MB). Note it only cares about erasure coding specific logic thus avoids coupling with any HDFS block details. We can have something like HdfsBlock extend it.

Constructor Summary

Constructors

Constructor	Description
ECBlock()	A default constructor.
ECBlock(boolean isParity, boolean isErased)	A constructor specifying isParity and isErased.

Method Summary

Modifier and Type	Method	Description
boolean	isErased()
boolean	isParity()
void	setErased(boolean isErased)	Set true if the block is missing.
void	setParity(boolean isParity)	Set true if it's for a parity block.

Methods inherited from class java.lang.Object

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

Constructor Detail

ECBlock

public ECBlock()

A default constructor. isParity and isErased are false by default.

ECBlock

public ECBlock(boolean isParity,
               boolean isErased)

A constructor specifying isParity and isErased.

Parameters:

isParity - is a parity block

isErased - is erased or not

Method Detail

setParity

public void setParity(boolean isParity)

Set true if it's for a parity block.

Parameters:

isParity - is parity or not

setErased

public void setErased(boolean isErased)

Set true if the block is missing.

Parameters:

isErased - is erased or not

isParity

public boolean isParity()

Returns:

true if it's parity block, otherwise false

isErased

public boolean isErased()

Returns:

true if it's erased due to erasure, otherwise false