Package com.linkedin.venice.kafka.validation.checksum

Class CheckSum

java.lang.Object

com.linkedin.venice.kafka.validation.checksum.CheckSum

Direct Known Subclasses:

AdHash, Adler32CheckSum, CRC32CheckSum, MD5CheckSum

public abstract class CheckSum
extends Object

Parent class for various running checksum implementations. CheckSum has 2 modes -- write mode and read mode. Updating check sum is only available in the write mode. When getCheckSum() is called, the object will flip to the read mode and Checksum value will be finalized. reset() can flip the object back to the write mode and checksum value will be re-initialized.

Constructor Summary

Constructors

Constructor	Description
CheckSum()

Method Summary

Modifier and Type	Method	Description
byte[]	getCheckSum()	Get the checkSum of the buffer till now.
byte[]	getEncodedState()
protected abstract byte[]	getFinalCheckSum()
static CheckSum	getInstance(CheckSumType type)
static CheckSum	getInstance(CheckSumType type, byte[] encodedState)
abstract CheckSumType	getType()
void	reset()	Reset the checksum generator
abstract void	resetInternal()
String	toString()
void	update(byte[] input)	Update the checksum buffer to include input
void	update(byte[] input, int startIndex, int length)	Update the checksum buffer to include input with startIndex and length.
void	update(int number)	Update the underlying buffer using the integer
void	update(short number)	Update the underlying buffer using the short
protected abstract void	updateChecksum(byte[] input, int startIndex, int length)

Methods inherited from class java.lang.Object

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

Constructor Details

CheckSum

public CheckSum()

Method Details

update

public void update(byte[] input,
 int startIndex,
 int length)

Update the checksum buffer to include input with startIndex and length. Following calls to multiple 'update's you need to call 'getCheckSum' which will reset the buffer as well.

updateChecksum

protected abstract void updateChecksum(byte[] input,
 int startIndex,
 int length)

getCheckSum

public byte[] getCheckSum()

Get the checkSum of the buffer till now. When it called, the object will flip from write mode to read mode

getFinalCheckSum

protected abstract byte[] getFinalCheckSum()

reset

public void reset()

Reset the checksum generator

resetInternal

public abstract void resetInternal()

getType

public abstract CheckSumType getType()

getEncodedState

public byte[] getEncodedState()

update

public void update(int number)

Update the underlying buffer using the integer

Parameters:

number - number to be stored in checksum buffer

update

public void update(short number)

Update the underlying buffer using the short

Parameters:

number - number to be stored in checksum buffer

update

public void update(byte[] input)

Update the checksum buffer to include input

Parameters:

input - bytes added to the buffer

getInstance

public static CheckSum getInstance(CheckSumType type)

getInstance

public static CheckSum getInstance(CheckSumType type,
 byte[] encodedState)

toString

public String toString()

Overrides:

toString in class Object